/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animation Classes */
.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.8s ease-out forwards;
    opacity: 0;
}

.animate-fade-in-right {
    animation: fadeInRight 0.8s ease-out forwards;
    opacity: 0;
}

.animate-slide-in-left {
    animation: slideInLeft 0.8s ease-out forwards;
    opacity: 0;
}

.animate-slide-in-right {
    animation: slideInRight 0.8s ease-out forwards;
    opacity: 0;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* Delay Classes */
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-600 { animation-delay: 0.6s; }
.delay-700 { animation-delay: 0.7s; }
.delay-1000 { animation-delay: 1s; }

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    animation: slideDown 0.6s ease-out forwards;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    font-size: 2rem;
    font-weight: bold;
    color: #22d3ee;
    animation: pulse 2s ease-in-out infinite;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: #f4f4f4;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #22d3ee;
    transform: scale(1.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #22d3ee;
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #f4f4f4;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background: #22d3ee;
    color: #0f172a;
}

.btn-primary:hover {
    background: #0891b2;
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(34, 211, 238, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #22d3ee;
    border: 2px solid #22d3ee;
}

.btn-secondary:hover {
    background: #22d3ee;
    color: #0f172a;
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(34, 211, 238, 0.3);
}

/* Home Section */
.home-section {
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    display: flex;
    align-items: center;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.home-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23334155" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.1;
}

.home-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.home-text {
    color: white;
}

.home-title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.highlight {
    color: #22d3ee;
}

.home-subtitle {
    font-size: 1.5rem;
    color: #cbd5e1;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.home-description {
    font-size: 1.1rem;
    color: #94a3b8;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.home-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.home-image {
    display: flex;
    justify-content: center;
}

.profile-image-container {
    position: relative;
    width: 320px;
    height: 400px;
    background: linear-gradient(135deg, #22d3ee, #3b82f6);
    border-radius: 20px;
    padding: 4px;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
    transition: transform 0.3s ease;
}

.profile-image:hover {
    transform: scale(1.05);
}

/* About Section */
.about-section {
    padding: 100px 0;
    background: #ffffff;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 3rem;
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.about-description {
    text-align: center;
    margin-bottom: 4rem;
}

.about-description p {
    font-size: 1.1rem;
    color: #475569;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat-item {
    text-align: center;
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    color: #22d3ee;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #64748b;
    font-weight: 500;
}

.skills-section {
    margin-bottom: 4rem;
}

.skills-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    color: #1e293b;
    margin-bottom: 3rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.skill-category h4 {
    font-size: 1.3rem;
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 1.5rem;
    text-align: center;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.skill-item:hover {
    background: #e0f2fe;
    transform: translateX(10px);
}

.skill-item i {
    font-size: 1.5rem;
    color: #22d3ee;
    width: 24px;
}

.skill-item span {
    color: #475569;
    font-weight: 500;
}

.education-section {
    margin-top: 4rem;
}

.education-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    color: #1e293b;
    margin-bottom: 3rem;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.education-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: #f8fafc;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.education-item:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.education-item i {
    font-size: 2rem;
    color: #22d3ee;
    margin-top: 0.25rem;
}

.education-item h4 {
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.education-item p {
    color: #64748b;
}

/* Experience Section */
.experience-section {
    padding: 100px 0;
    background: #f8fafc;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #22d3ee;
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
    padding-right: 2rem;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 20px;
    background: #22d3ee;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 4px #22d3ee;
}

.timeline-item:nth-child(odd)::before {
    right: -10px;
}

.timeline-item:nth-child(even)::before {
    left: -10px;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #22d3ee;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.timeline-header {
    margin-bottom: 1rem;
}

.timeline-header h3 {
    font-size: 1.3rem;
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 0.5rem;
}

.company {
    color: #22d3ee;
    font-weight: 600;
    display: block;
    margin-bottom: 0.25rem;
}

.period {
    color: #64748b;
    font-size: 0.9rem;
    font-weight: 500;
}

.timeline-content p {
    color: #475569;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: #e0f2fe;
    color: #0891b2;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.skill-tag:hover {
    background: #22d3ee;
    color: white;
    transform: scale(1.1);
}

/* Portfolio Section */
.portfolio-section {
    padding: 100px 0;
    background: white;
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #22d3ee;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.github-link:hover {
    color: #0891b2;
    transform: scale(1.1);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.portfolio-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.portfolio-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

.portfolio-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.portfolio-card:hover img {
    transform: scale(1.1);
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-content h3 {
    font-size: 1.3rem;
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 1rem;
}

.portfolio-content p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: #f1f5f9;
    color: #475569;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tech-tag:hover {
    background: #e0f2fe;
    color: #0891b2;
    transform: scale(1.1);
}

/* Calculator Section */
.calculator-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.calculator-section .section-header h2 {
    color: white;
}

.calculator-section .section-header p {
    color: #cbd5e1;
}

.legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.legend-title {
    font-weight: bold;
    color: white;
}

.legend-items {
    display: flex;
    gap: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.legend-color.current {
    background: white;
}

.legend-color.new {
    background: #22d3ee;
}

.calculator-container {
    max-width: 1400px;
    margin: 0 auto;
}

.calculator-level {
    margin-bottom: 3rem;
}

.calculator-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 2px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
    color: #1e293b;
}

.calculator-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
    border-color: #22d3ee;
}

.calculator-card.main-card {
    max-width: 400px;
    margin: 0 auto;
}

.calculator-card h3 {
    text-align: center;
    font-weight: bold;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #0f172a;
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #64748b;
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus {
    outline: none;
    border-color: #22d3ee;
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.input-group input:hover {
    border-color: #22d3ee;
}

.result-display {
    background: #22d3ee;
    color: #0f172a;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    font-size: 1.1rem;
    margin-top: 1rem;
    animation: pulse 2s ease-in-out infinite;
}

.result-display.highlight {
    font-size: 2rem;
    background: linear-gradient(135deg, #22d3ee, #3b82f6);
    animation: pulse 1.5s ease-in-out infinite;
}

.additional-costs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.cost-item {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1rem;
    text-align: center;
    border: 1px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
}

.cost-item:hover {
    transform: translateY(-3px) scale(1.05);
    border-color: #22d3ee;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.cost-item h4 {
    font-size: 0.8rem;
    font-weight: bold;
    color: #0f172a;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cost-item input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
}

.cost-item input:focus {
    outline: none;
    border-color: #22d3ee;
}

.result-mini {
    background: #22d3ee;
    color: #0f172a;
    padding: 0.5rem;
    border-radius: 6px;
    font-weight: bold;
    font-size: 0.9rem;
    animation: pulse 2s ease-in-out infinite;
}

.operational-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid rgba(34, 211, 238, 0.2);
}

.operational-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.operational-item label {
    color: white;
    font-weight: 500;
    font-size: 0.9rem;
}

.operational-item input {
    padding: 0.75rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.operational-item input:focus {
    outline: none;
    border-color: #22d3ee;
    background: rgba(255, 255, 255, 0.2);
}

.operational-item input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.results-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 3rem;
    margin-top: 3rem;
    border: 2px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
}

.results-section:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #22d3ee;
}

.results-section h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: bold;
    color: white;
    margin-bottom: 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.main-result {
    text-align: center;
    margin-bottom: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, #22d3ee, #3b82f6);
    border-radius: 12px;
    animation: pulse 2s ease-in-out infinite;
}

.main-result h4 {
    color: #0f172a;
    font-weight: bold;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-result-value {
    font-size: 3rem;
    font-weight: bold;
    color: #0f172a;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.result-item {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 2px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
}

.result-item:hover {
    transform: translateY(-5px) scale(1.05);
    border-color: #22d3ee;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.result-item h4 {
    color: #0f172a;
    font-weight: bold;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #22d3ee;
}

.calculator-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.calculator-actions .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Modern Calculator Styles */
.calc-info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.info-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.3s ease;
}

.info-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.info-card i {
    font-size: 2.5rem;
    color: #22d3ee;
}

.info-card h4 {
    color: #22d3ee;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.info-card p {
    color: #cbd5e1;
    font-size: 0.9rem;
    margin: 0;
}

.calc-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.05);
    padding: 10px;
    border-radius: 12px;
    flex-wrap: wrap;
}

.calc-tab-btn {
    flex: 1;
    min-width: 200px;
    padding: 15px 25px;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 8px;
    color: #cbd5e1;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.calc-tab-btn:hover {
    background: rgba(34, 211, 238, 0.1);
    color: #22d3ee;
}

.calc-tab-btn.active {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
    color: #0f172a;
    border-color: #22d3ee;
}

.calc-tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.calc-tab-content.active {
    display: block;
}

.tab-section-title {
    color: #22d3ee;
    font-size: 1.4rem;
    margin: 30px 0 20px 0;
    display: flex;
    align-items: center;
    gap: 15px;
}

.tab-section-title i {
    font-size: 1.6rem;
}

.modern-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.modern-input-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 20px;
    border: 2px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
}

.modern-input-card:hover {
    border-color: #22d3ee;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transform: translateY(-3px);
}

.modern-input-card label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #0f172a;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1rem;
}

.modern-input-card input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    background: white;
    color: #0f172a;
}

.modern-input-card input:focus {
    outline: none;
    border-color: #22d3ee;
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.input-hint {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: #64748b;
    font-style: italic;
}

.modern-result-card {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

.modern-result-card.fuel {
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
}

.modern-result-card.personnel {
    background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
}

.modern-result-card.maintenance {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.modern-result-card .result-label {
    color: white;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
}

.modern-result-card .result-value {
    color: white;
    font-size: 1.8rem;
    font-weight: bold;
}

.modern-card-grid-sm {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.modern-input-card-sm {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    padding: 15px;
    border: 2px solid rgba(34, 211, 238, 0.2);
    text-align: center;
    transition: all 0.3s ease;
}

.modern-input-card-sm:hover {
    border-color: #22d3ee;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.modern-input-card-sm label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #0f172a;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.modern-input-card-sm input {
    width: 100%;
    padding: 10px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s ease;
}

.modern-input-card-sm input:focus {
    outline: none;
    border-color: #22d3ee;
}

.results-hero {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 20px 50px rgba(34, 211, 238, 0.4);
}

.hero-result {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
}

.hero-result i {
    font-size: 4rem;
    color: white;
}

.hero-label {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.hero-value {
    display: block;
    color: white;
    font-size: 3rem;
    font-weight: bold;
}

.results-modern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.result-modern-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    padding: 25px;
    border: 2px solid rgba(34, 211, 238, 0.2);
    text-align: center;
    transition: all 0.3s ease;
}

.result-modern-card:hover {
    border-color: #22d3ee;
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.result-modern-card.success {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    border-color: #22c55e;
}

.result-modern-card i {
    font-size: 2.5rem;
    color: #22d3ee;
    margin-bottom: 15px;
}

.result-modern-card.success i {
    color: #22c55e;
}

.result-modern-label {
    display: block;
    color: #64748b;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.result-modern-value {
    display: block;
    color: #0f172a;
    font-size: 1.8rem;
    font-weight: bold;
}

.calculator-actions-modern {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.btn-modern {
    padding: 15px 35px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-modern:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.btn-modern.btn-primary {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
    color: white;
}

.btn-modern.btn-export {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-modern.btn-reset {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    color: white;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background: #f8fafc;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.contact-item:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.contact-item i {
    font-size: 2rem;
    color: #22d3ee;
    width: 40px;
}

.contact-item h4 {
    font-weight: bold;
    color: #1e293b;
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: #64748b;
    margin: 0;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.contact-form:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #22d3ee;
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: #22d3ee;
}

.message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.message.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.message.error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

/* Footer */
.footer {
    background: #0f172a;
    color: white;
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #22d3ee;
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .home-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .home-title {
        font-size: 2.5rem;
    }

    .home-subtitle {
        font-size: 1.2rem;
    }

    .home-buttons {
        justify-content: center;
    }

    .profile-image-container {
        width: 250px;
        height: 300px;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .stats {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .education-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 3rem !important;
        padding-right: 0 !important;
    }

    .timeline-item::before {
        left: 10px !important;
        right: auto !important;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .calculator-grid {
        grid-template-columns: 1fr;
    }

    .additional-costs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .operational-grid {
        grid-template-columns: 1fr;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .main-result-value {
        font-size: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .legend {
        flex-direction: column;
        gap: 1rem;
    }

    .calculator-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .home-title {
        font-size: 2rem;
    }

    .home-subtitle {
        font-size: 1rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .skills-title,
    .education-title {
        font-size: 1.8rem;
    }

    .additional-costs-grid {
        grid-template-columns: 1fr;
    }

    .main-result-value {
        font-size: 1.5rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #22d3ee;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }

.hidden { display: none; }
.visible { opacity: 1; }

/* Forum Section Styles */
.forum-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #e2e8f0;
}

.forum-guidelines {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.guidelines-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    color: #22d3ee;
}

.guidelines-header i {
    font-size: 2rem;
}

.guidelines-header h3 {
    font-size: 1.8rem;
    margin: 0;
}

.guidelines-content p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.guidelines-content ul {
    list-style: none;
    padding-left: 0;
}

.guidelines-content li {
    padding: 10px 0 10px 30px;
    position: relative;
}

.guidelines-content li:before {
    content: "▶";
    position: absolute;
    left: 0;
    color: #22d3ee;
}

.admin-access {
    text-align: center;
    margin: 30px 0;
}

.forum-tabs {
    display: flex;
    gap: 20px;
    margin: 40px 0;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    max-width: 300px;
    padding: 20px 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(34, 211, 238, 0.3);
    border-radius: 12px;
    color: #e2e8f0;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.tab-btn i {
    font-size: 1.5rem;
}

.tab-btn:hover {
    background: rgba(34, 211, 238, 0.1);
    border-color: #22d3ee;
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, #22d3ee 0%, #0ea5e9 100%);
    border-color: #22d3ee;
    color: #0f172a;
    font-weight: bold;
}

.forum-ask-section {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 30px;
    margin: 40px 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.forum-ask-section h3 {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    color: #22d3ee;
    font-size: 1.6rem;
}

.forum-ask-section h3 i {
    font-size: 1.8rem;
}

.forum-ask-section .form-group {
    margin-bottom: 20px;
}

.forum-ask-section input,
.forum-ask-section textarea {
    width: 100%;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #e2e8f0;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.forum-ask-section input:focus,
.forum-ask-section textarea:focus {
    outline: none;
    border-color: #22d3ee;
    background: rgba(255, 255, 255, 0.15);
}

.forum-ask-section small {
    display: block;
    margin-top: 8px;
    color: #94a3b8;
    font-size: 0.9rem;
}

.forum-questions-section {
    margin: 40px 0;
}

.forum-questions-section h3 {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    color: #22d3ee;
    font-size: 1.6rem;
}

.questions-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.question-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.question-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 15px;
}

.question-meta {
    flex: 1;
}

.question-title {
    font-size: 1.4rem;
    color: #22d3ee;
    margin-bottom: 10px;
    font-weight: 600;
}

.question-author {
    color: #94a3b8;
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.question-date {
    color: #64748b;
    font-size: 0.85rem;
}

.question-status {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.question-status.pending {
    background: rgba(251, 191, 36, 0.2);
    color: #fbbf24;
    border: 1px solid #fbbf24;
}

.question-status.answered {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
    border: 1px solid #22c55e;
}

.question-status.closed {
    background: rgba(148, 163, 184, 0.2);
    color: #94a3b8;
    border: 1px solid #94a3b8;
}

.question-content {
    color: #e2e8f0;
    line-height: 1.8;
    margin-bottom: 15px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.question-image {
    max-width: 100%;
    border-radius: 8px;
    margin: 15px 0;
}

.question-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.admin-answer-section {
    background: rgba(34, 211, 238, 0.1);
    border-left: 4px solid #22d3ee;
    padding: 20px;
    margin-top: 20px;
    border-radius: 8px;
}

.answer-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: #22d3ee;
}

.answer-header i {
    font-size: 1.3rem;
}

.answer-admin {
    color: #94a3b8;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.answer-content {
    color: #e2e8f0;
    line-height: 1.8;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.answer-image {
    max-width: 100%;
    border-radius: 8px;
    margin: 15px 0;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #94a3b8;
    font-size: 1.1rem;
}

.loading i {
    font-size: 2rem;
    margin-bottom: 15px;
    display: block;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    padding: 40px;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 1px solid rgba(34, 211, 238, 0.3);
    animation: fadeInUp 0.3s ease;
}

.admin-modal-content {
    max-width: 800px;
}

.modal-content h3 {
    color: #22d3ee;
    margin-bottom: 25px;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    color: #94a3b8;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close:hover {
    color: #22d3ee;
    background: rgba(34, 211, 238, 0.1);
    transform: rotate(90deg);
}

#question-message,
#answer-message,
#admin-login-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    display: none;
}

#question-message.success,
#answer-message.success,
#admin-login-message.success {
    display: block;
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
    border: 1px solid #22c55e;
}

#question-message.error,
#answer-message.error,
#admin-login-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border: 1px solid #ef4444;
}

#answer-question-preview {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 25px;
    border-left: 4px solid #22d3ee;
}

#answer-question-preview h4 {
    color: #22d3ee;
    margin-bottom: 10px;
}

#answer-question-preview p {
    color: #e2e8f0;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .forum-tabs {
        flex-direction: column;
    }

    .tab-btn {
        max-width: 100%;
    }

    .question-header {
        flex-direction: column;
    }

    .modal-content {
        padding: 25px;
        width: 95%;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .calculator-actions {
        display: none;
    }

    .calculator-section {
        background: white;
        color: black;
    }

    .calculator-card {
        border: 1px solid #ccc;
        break-inside: avoid;
    }
}
/* Mini Projetos Section */
.mini-projetos-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #e2e8f0;
}

.projects-menu {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin: 40px 0;
    flex-wrap: wrap;
}

.project-menu-btn {
    flex: 1;
    max-width: 300px;
    min-width: 250px;
    padding: 25px 35px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(34, 211, 238, 0.3);
    border-radius: 12px;
    color: #e2e8f0;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.project-menu-btn i {
    font-size: 2.5rem;
    color: #22d3ee;
}

.project-menu-btn:hover {
    background: rgba(34, 211, 238, 0.1);
    border-color: #22d3ee;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(34, 211, 238, 0.3);
}

.project-menu-btn.active {
    background: linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
    border-color: #22d3ee;
    color: #0f172a;
}

.project-menu-btn.active i {
    color: #0f172a;
}

.project-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.project-content.active {
    display: block;
}

.project-intro {
    text-align: center;
    margin: 40px 0 30px 0;
}

.project-intro h3 {
    color: #22d3ee;
    font-size: 2rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.project-intro p {
    color: #cbd5e1;
    font-size: 1.1rem;
}

/* Shopping List Styles */
.shopping-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 30px;
    margin-top: 30px;
    min-height: 600px;
}

.shopping-sidebar {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.shopping-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.shopping-sidebar-header h4 {
    color: #22d3ee;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: #22d3ee;
    color: #0f172a;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: 1.1rem;
}

.btn-icon:hover {
    background: #3b82f6;
    transform: scale(1.1);
}

.btn-icon.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-icon.btn-danger:hover {
    background: #dc2626;
}

.btn-icon.btn-danger-small {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
}

.shopping-lists {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.shopping-list-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 2px solid transparent;
}

.shopping-list-item:hover {
    background: rgba(34, 211, 238, 0.1);
    border-color: #22d3ee;
}

.shopping-list-item.active {
    background: rgba(34, 211, 238, 0.2);
    border-color: #22d3ee;
}

.shopping-list-item i {
    color: #22d3ee;
    font-size: 1.3rem;
}

.shopping-list-item strong {
    color: #e2e8f0;
    display: block;
    font-size: 1rem;
}

.shopping-list-item small {
    color: #94a3b8;
    font-size: 0.85rem;
}

.shopping-main {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.shopping-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    text-align: center;
}

.shopping-empty i {
    font-size: 5rem;
    color: #64748b;
    margin-bottom: 20px;
}

.shopping-empty h4 {
    color: #cbd5e1;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.shopping-empty p {
    color: #94a3b8;
}

.shopping-list-view {
    animation: fadeIn 0.3s ease;
}

.shopping-list-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid rgba(34, 211, 238, 0.3);
}

.shopping-list-header h3 {
    color: #22d3ee;
    font-size: 1.8rem;
    margin: 0 0 5px 0;
}

.shopping-list-header p {
    color: #94a3b8;
    margin: 0;
}

.shopping-list-actions {
    display: flex;
    gap: 10px;
}

.shopping-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
    max-height: 400px;
    overflow-y: auto;
}

.shopping-item {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    border: 2px solid rgba(34, 211, 238, 0.2);
    transition: all 0.3s ease;
}

.shopping-item:hover {
    border-color: #22d3ee;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.shopping-item.completed {
    opacity: 0.6;
    background: rgba(100, 116, 139, 0.3);
}

.shopping-item.completed .item-details strong {
    text-decoration: line-through;
}

.item-checkbox input[type="checkbox"] {
    width: 24px;
    height: 24px;
    cursor: pointer;
}

.item-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.item-details strong {
    color: #0f172a;
    font-size: 1.1rem;
}

.item-quantity {
    color: #64748b;
    font-size: 0.9rem;
}

.item-price {
    color: #22d3ee;
    font-weight: 600;
    font-size: 1rem;
}

.shopping-summary {
    background: rgba(34, 211, 238, 0.1);
    border-radius: 8px;
    padding: 20px;
    border-left: 4px solid #22d3ee;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    color: #e2e8f0;
}

.summary-row.highlight {
    font-size: 1.2rem;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 10px;
}

.summary-row.highlight strong {
    color: #22d3ee;
    font-size: 1.5rem;
}

.empty-lists,
.empty-items {
    text-align: center;
    padding: 40px 20px;
    color: #94a3b8;
}

.empty-lists i,
.empty-items i {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
    color: #64748b;
}

.loading-small {
    text-align: center;
    padding: 20px;
    color: #94a3b8;
}

.loading-small i {
    font-size: 1.5rem;
}

.modal-sm {
    max-width: 500px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.full-width {
    width: 100%;
}

.optional {
    color: #94a3b8;
    font-size: 0.85rem;
    font-weight: normal;
}

select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    color: #0f172a;
    transition: all 0.3s ease;
}

select:focus {
    outline: none;
    border-color: #22d3ee;
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

@media (max-width: 768px) {
    .shopping-container {
        grid-template-columns: 1fr;
    }

    .shopping-sidebar {
        max-height: 300px;
        overflow-y: auto;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .projects-menu {
        flex-direction: column;
    }

    .project-menu-btn {
        max-width: 100%;
    }
}

/* WhatsApp Section */
.whatsapp-section {
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    border-radius: 12px;
    padding: 25px;
    margin-top: 30px;
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.3);
}

.whatsapp-section h4 {
    color: white;
    font-size: 1.3rem;
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.whatsapp-section h4 i {
    font-size: 1.5rem;
}

.whatsapp-input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.whatsapp-input-group input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    font-size: 1.1rem;
    background: rgba(255, 255, 255, 0.95);
    color: #0f172a;
    transition: all 0.3s ease;
}

.whatsapp-input-group input:focus {
    outline: none;
    border-color: white;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.whatsapp-input-group input::placeholder {
    color: #94a3b8;
}

.btn-whatsapp {
    padding: 15px 30px;
    background: white;
    color: #25D366;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-whatsapp:hover {
    background: #f0fdf4;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.btn-whatsapp i {
    font-size: 1.3rem;
}

.whatsapp-hint {
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.whatsapp-hint i {
    font-size: 1rem;
}

@media (max-width: 768px) {
    .whatsapp-input-group {
        flex-direction: column;
    }

    .btn-whatsapp {
        width: 100%;
        justify-content: center;
    }
}

/* Country Code Select */
.country-code-select {
    min-width: 120px;
    max-width: 140px;
    padding: 15px 12px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    font-size: 1.05rem;
    background: rgba(255, 255, 255, 0.95);
    color: #0f172a;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.country-code-select:focus {
    outline: none;
    border-color: white;
    background: white;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.country-code-select option {
    padding: 10px;
    font-size: 1rem;
}

@media (max-width: 768px) {
    .country-code-select {
        width: 100%;
        max-width: 100%;
    }
}