@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --bg-color: #f8f8f4;
    --primary-text: #2d3436;
    --secondary-text: #636e72;
    --accent-wood: #a67c52;
    --accent-moss: #4a5d4e;
    --accent-earth: #c5a059;
    --card-bg: #ffffff;
    --border-radius: 12px;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --primary-text: #f5f5f5;
    --secondary-text: #c0c0c0;
    --accent-wood: #e8b896;
    --accent-moss: #9dc4a1;
    --accent-earth: #f0d090;
    --card-bg: #2d2d2d;
}

[data-theme="dark"] .text-primary-text {
    color: var(--primary-text) !important;
}

[data-theme="dark"] .text-secondary-text {
    color: var(--secondary-text) !important;
}

[data-theme="dark"] .bg-gray-100 {
    background-color: #3a3a3a !important;
}

[data-theme="dark"] .bg-green-100 { background-color: rgba(34, 197, 94, 0.15) !important; }
[data-theme="dark"] .bg-blue-100 { background-color: rgba(59, 130, 246, 0.15) !important; }
[data-theme="dark"] .bg-purple-100 { background-color: rgba(168, 85, 247, 0.15) !important; }
[data-theme="dark"] .bg-yellow-100 { background-color: rgba(234, 179, 8, 0.15) !important; }
[data-theme="dark"] .bg-gray-50 { background-color: #3a3a3a !important; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes ripple {
    0% { transform: scale(0); opacity: 1; }
    100% { transform: scale(4); opacity: 0; }
}

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

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--primary-text);
    animation: fadeIn 1s ease-out;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.03);
    animation: slideUp 0.8s cubic-bezier(0.165, 0.84, 0.44, 1) forwards;
    opacity: 0;
}

[data-theme="dark"] .card {
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.06);
}

[data-theme="dark"] .card:hover {
    box-shadow: 0 12px 30px rgba(0,0,0,0.5);
}

.card.no-hover:hover {
    transform: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.section-title {
    font-size: 1.5rem;
    color: var(--accent-moss);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 700;
}

.section-title svg {
    flex-shrink: 0;
}

.bullet-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

.bullet-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-earth);
    font-weight: bold;
}

.tag {
    background: #f1f2f6;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--secondary-text);
    display: inline-block;
    margin: 2px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .tag {
    background: #3a3a3a;
}

.tag:hover {
    background: var(--accent-earth);
    color: white;
    transform: translateY(-2px);
}

.tag.active {
    background: var(--accent-moss);
    color: white;
}

.tag::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.tag:active::before {
    width: 300px;
    height: 300px;
}

.contact-item:hover, .project-link:hover {
    color: var(--accent-earth);
}

.animated-section:nth-child(1) { animation-delay: 0.2s; }
.animated-section:nth-child(2) { animation-delay: 0.3s; }
.animated-section:nth-child(3) { animation-delay: 0.4s; }
.animated-section:nth-child(4) { animation-delay: 0.5s; }

.impact-box {
    background: #faf7f2;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    border: 1px solid rgba(197, 160, 89, 0.2);
}

[data-theme="dark"] .impact-box {
    background: #3a3a2a;
    border: 1px solid rgba(229, 192, 121, 0.2);
}

.progress-bar {
    height: 8px;
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 8px;
}

[data-theme="dark"] .progress-bar {
    background: #4a4a4a;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-moss), var(--accent-earth));
    border-radius: 10px;
    transition: width 1.5s cubic-bezier(0.165, 0.84, 0.44, 1);
    width: 0;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-moss), var(--accent-earth));
    z-index: 9999;
    transition: width 0.1s ease;
}

.nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    backdrop-filter: blur(10px);
}

.nav-menu.visible {
    transform: translateY(0);
}

/* For project pages: always visible nav */
.nav-menu.always-visible {
    transform: translateY(0);
    position: sticky;
}

.nav-menu a {
    color: var(--secondary-text);
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-earth);
    transition: width 0.3s ease;
}

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

.nav-menu a.active {
    color: var(--accent-moss);
}

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-moss);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    animation: pulse 1s infinite;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    background: var(--accent-earth);
    border-radius: 50%;
    position: absolute;
    left: -39px;
    top: 6px;
    border: 2px solid var(--bg-color);
    transition: var(--transition);
}

.project-item:hover .timeline-dot {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px rgba(197, 160, 89, 0.2);
}

.project-item {
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    padding-left: 5px;
}

.project-item.collapsed .project-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.project-item .project-details {
    max-height: 1000px;
    transition: max-height 0.5s ease;
}

.counter {
    font-weight: bold;
    color: var(--accent-moss);
}

.filter-btn {
    padding: 8px 16px;
    border-radius: 20px;
    border: 2px solid var(--accent-moss);
    background: transparent;
    color: var(--accent-moss);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-moss);
    color: white;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--accent-moss);
    color: var(--accent-moss);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.social-link:hover {
    background: var(--accent-moss);
    color: white;
    transform: translateY(-5px) rotate(360deg);
}

/* ===== Project Detail Page Styles ===== */

.project-hero {
    animation: slideUp 0.6s ease forwards;
    opacity: 0;
}

.metric-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
    animation: slideUp 0.8s ease forwards;
    opacity: 0;
}

.metric-card:nth-child(1) { animation-delay: 0.1s; }
.metric-card:nth-child(2) { animation-delay: 0.2s; }
.metric-card:nth-child(3) { animation-delay: 0.3s; }
.metric-card:nth-child(4) { animation-delay: 0.4s; }

[data-theme="dark"] .metric-card {
    border: 1px solid rgba(255,255,255,0.1);
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-moss);
    line-height: 1;
    margin-bottom: 8px;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--secondary-text);
    font-weight: 500;
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent-moss), var(--accent-earth));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: white;
}

.detail-section {
    animation: slideUp 0.8s ease forwards;
    opacity: 0;
}

.detail-section:nth-child(1) { animation-delay: 0.2s; }
.detail-section:nth-child(2) { animation-delay: 0.3s; }
.detail-section:nth-child(3) { animation-delay: 0.4s; }
.detail-section:nth-child(4) { animation-delay: 0.5s; }

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: 8px;
    background: var(--card-bg);
    border: 2px solid var(--accent-moss);
    color: var(--accent-moss);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    text-decoration: none;
}

.back-btn:hover {
    background: var(--accent-moss);
    color: white;
}

.project-nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 8px;
    background: var(--card-bg);
    border: 1px solid rgba(0,0,0,0.1);
    color: var(--primary-text);
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
    text-decoration: none;
}

[data-theme="dark"] .project-nav-btn {
    border: 1px solid rgba(255,255,255,0.15);
}

.project-nav-btn:hover {
    border-color: var(--accent-moss);
    color: var(--accent-moss);
    transform: translateY(-2px);
}

.contribution-item {
    padding: 16px;
    border-radius: 8px;
    background: var(--card-bg);
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

[data-theme="dark"] .contribution-item {
    border: 1px solid rgba(255,255,255,0.08);
}

.contribution-item:hover {
    border-color: var(--accent-earth);
    transform: translateX(4px);
}

.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    background: #f1f2f6;
    color: var(--primary-text);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

[data-theme="dark"] .tech-badge {
    background: #3a3a3a;
}

.tech-badge:hover {
    background: var(--accent-moss);
    color: white;
    transform: translateY(-2px);
}

/* Project card on homepage - clickable */
.project-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.project-card-link:hover {
    transform: translateY(-3px);
}

.view-details-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0;
    background: none;
    color: var(--accent-moss);
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
    margin-top: 12px;
}

.view-details-btn:hover {
    color: var(--accent-earth);
    transform: translateX(4px);
}

/* ===== Responsive ===== */

/* Extra Small devices */
@media (max-width: 575.98px) {
    .section-title {
        font-size: 1.25rem;
        margin-bottom: 20px;
        gap: 10px;
    }
    
    .section-title svg {
        width: 20px;
        height: 20px;
    }
    
    .card {
        padding: 1.25rem !important;
    }
    
    .filter-controls {
        justify-content: center;
    }
    
    .filter-btn {
        padding: 6px 12px;
        font-size: 0.8rem;
    }
    
    .impact-box {
        padding: 12px;
    }
    
    .bullet-list li {
        font-size: 0.9rem;
        padding-left: 16px;
    }
    
    .timeline-dot {
        width: 10px;
        height: 10px;
        left: -35px;
    }
    
    .scroll-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }
    
    .social-link {
        width: 40px;
        height: 40px;
    }
    
    .tag {
        padding: 3px 10px;
        font-size: 0.8rem;
    }

    .metric-value {
        font-size: 1.8rem;
    }

    .metric-card {
        padding: 16px;
    }
}

/* Small devices */
@media (min-width: 576px) and (max-width: 767.98px) {
    .section-title {
        font-size: 1.35rem;
    }
}

/* Medium devices */
@media (min-width: 768px) and (max-width: 991.98px) {
    .card {
        padding: 1.5rem !important;
    }
}

/* Navigation responsive */
.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--accent-moss);
}

@media (max-width: 767.98px) {
    .nav-menu .desktop-nav {
        display: none;
    }
    
    .nav-menu .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu .mobile-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--card-bg);
        padding: 1rem;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        flex-direction: column;
        gap: 0.75rem;
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    .nav-menu.mobile-open .mobile-nav {
        display: flex;
    }
    
    .nav-menu .mobile-nav a {
        padding: 0.5rem 0;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .nav-menu .mobile-nav a:last-child {
        border-bottom: none;
    }
    
    #downloadPDF span {
        display: none;
    }
    
    #downloadPDF::before {
        content: '📄';
        font-size: 1rem;
    }
}

@media (min-width: 768px) {
    .nav-menu .desktop-nav {
        display: flex;
    }
    
    .nav-menu .mobile-menu-btn {
        display: none;
    }
    
    .nav-menu .mobile-nav {
        display: none !important;
    }
}

/* Timeline responsive */
@media (max-width: 767.98px) {
    .border-l-2 {
        margin-left: 0.5rem;
    }
    
    .pl-8 {
        padding-left: 1.5rem !important;
    }
    
    .timeline-dot {
        left: -23px !important;
    }
    
    .project-item h5 {
        font-size: 1rem;
    }
}

/* Card hover disabled on touch devices */
@media (hover: none) {
    .card:hover {
        transform: none;
    }
    
    .tag:hover {
        transform: none;
    }
    
    .social-link:hover {
        transform: translateY(-3px) rotate(0deg);
    }
}

@media print {
    .nav-menu, .scroll-to-top, .filter-controls, .no-print, .scroll-progress {
        display: none !important;
    }
    * {
        color: #2d3436 !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    body {
        background: white !important;
        font-size: 11px !important;
    }
    .card {
        box-shadow: none !important;
        border: 1px solid #e0e0e0 !important;
        page-break-inside: avoid;
    }
    .section-title {
        color: #4a5d4e !important;
    }
    .section-title span, .section-title svg {
        color: #4a5d4e !important;
        stroke: #4a5d4e !important;
    }
    h4.text-accent-moss { color: #4a5d4e !important; }
    .text-accent-wood, p.font-semibold { color: #a67c52 !important; }
    .tag {
        border: 1px solid #ccc !important;
        background: #f5f5f5 !important;
        color: #333 !important;
    }
    .impact-box {
        border-left: 3px solid #c5a059 !important;
        background: #fafaf5 !important;
    }
    a { color: #4a5d4e !important; text-decoration: underline !important; }
    .container { max-width: 100% !important; padding: 0 20px !important; }
    .project-details { display: block !important; max-height: none !important; overflow: visible !important; opacity: 1 !important; }
}