/* ======================== */
/* Dark Theme Color Scheme  */
/* ======================== */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-card: #1e1e1e;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent: #00d4ff;
    --accent-hover: #00a8cc;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --border-color: #2a2a2a;
}

/* ======================== */
/* General Reset & Basics   */
/* ======================== */
html, body {
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

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

a {
    color: var(--accent);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

/* ======================== */
/* Header (Navbar)          */
/* ======================== */
.navbar {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 999;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
}

/* Profile + Title Wrapper */
.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Profile Image */
.profile-pic {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent);
}

.logo a {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo a:hover {
    color: var(--accent);
}

/* Desktop Navigation */
.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-links li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links li a:hover {
    color: var(--accent);
}

.nav-links li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

.nav-links li a:hover::after {
    width: 100%;
}

/* ======================== */
/* Hamburger Menu (Mobile)  */
/* ======================== */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
    padding: 10px;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle {
    display: none;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        transition: right 0.3s ease;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.5);
    }

    .nav-toggle:checked ~ nav .nav-links {
        right: 0;
    }

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

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

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

    .nav-links li a {
        font-size: 1.2rem;
    }
}

/* ======================== */
/* Hero Section             */
/* ======================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    /* Fallback gradient when video isn't loaded */
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f0f0f 100%);
    background-size: 200% 200%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 20px;
    max-width: 800px;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
    color: var(--text-primary);
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary {
    padding: 15px 35px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: var(--bg-primary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-tagline {
        font-size: 1.1rem;
    }

    .btn-primary,
    .btn-secondary {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* ======================== */
/* Main Content             */
/* ======================== */
main {
    padding: 60px 0;
    text-align: center;
}

/* Remove padding when hero is present (home page) */
main:has(.hero) {
    padding: 0;
}

/* Fallback for browsers without :has() support */
.hero ~ * {
    padding-top: 60px;
}

main h1 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

main p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* ======================== */
/* Footer                   */
/* ======================== */
footer {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 40px 0;
    margin-top: 50px;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-links {
    list-style: none;
    display: flex;
    gap: 30px;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links li {
    display: flex;
    align-items: center;
}

.footer-links a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--text-primary);
}

/* Social Icon */
.social-icon {
    width: 24px;
    height: 24px;
    transition: all 0.3s ease;
    filter: brightness(0) invert(1);
}

.social-icon:hover {
    filter: brightness(0) invert(1) drop-shadow(0 0 5px var(--accent));
}

/* ======================== */
/* Projects Section         */
/* ======================== */
.projects-section {
    padding: 40px 0;
}

.projects-section h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
    color: var(--text-primary);
}

/* The responsive grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

/* The card holding each project */
.project-card {
    background-color: var(--bg-card);
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    text-align: center;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.15);
    border-color: var(--accent);
}

/* The project image */
.project-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

/* Title inside the card */
.project-card h3 {
    padding: 15px 15px 5px;
    font-size: 1.2rem;
    color: var(--text-primary);
    margin: 0;
}

/* Description text */
.project-card p {
    margin: 0 15px 15px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

/* "View Details" button/link */
.btn-project {
    margin: auto 20px 20px;
    padding: 12px 25px;
    background-color: transparent;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    border-radius: 5px;
    border: 2px solid var(--accent);
    transition: all 0.3s ease;
    align-self: center;
}

.btn-project:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* ======================== */
/* Category Headers         */
/* ======================== */
.category-header {
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-top: 50px;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    text-align: left;
}

.projects-section .category-header:first-of-type {
    margin-top: 10px;
}

/* ======================== */
/* Project Detail Pages     */
/* ======================== */
.project-section {
    margin-bottom: 2rem;
}

.project-section p {
    text-align: left !important;
    color: var(--text-secondary);
}

.project-section h2 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* ======================== */
/* Photo Grids              */
/* ======================== */
.photo-grid {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.photo-grid--2x4 {
    grid-template-rows: repeat(2, 1fr);
    grid-template-columns: repeat(4, 1fr);
}

.photo-grid--2x3 {
    grid-template-rows: repeat(2, 1fr);
    grid-template-columns: repeat(3, 1fr);
}

.photo-grid--1x2 {
    grid-template-rows: repeat(1, 1fr);
    grid-template-columns: repeat(2, 1fr);
}

.photo-grid--1x3 {
    grid-template-rows: repeat(1, 1fr);
    grid-template-columns: repeat(3, 1fr);
}

.photo-grid--1x4 {
    grid-template-rows: repeat(1, 1fr);
    grid-template-columns: repeat(4, 1fr);
}

.photo-grid img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.photo-grid.single-photo img {
    width: auto;
    height: auto;
    aspect-ratio: unset;
    object-fit: contain;
    max-width: 100%;
    margin: 0 auto;
}

.photo-grid figure {
    margin: 0;
    text-align: center;
}

.photo-grid figcaption {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .photo-grid--2x4,
    .photo-grid--2x3,
    .photo-grid--1x4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ======================== */
/* Tables & Lists           */
/* ======================== */
.model-steps {
    text-align: left;
    max-width: 800px;
    margin: 20px auto;
    padding-left: 20px;
}

.model-steps li {
    margin-bottom: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.model-tables {
    max-width: 800px;
    margin: 2rem auto;
    text-align: left;
}

.model-tables h2,
.model-tables h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.example-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

.example-table th,
.example-table td {
    border: 1px solid var(--border-color);
    padding: 12px;
    color: var(--text-secondary);
}

.example-table th {
    background-color: var(--bg-card);
    font-weight: bold;
    text-align: left;
    color: var(--text-primary);
}

.example-table tr:hover {
    background-color: var(--bg-card);
}

ol, ul {
    text-align: left;
}

/* ======================== */
/* Video Section            */
/* ======================== */
.video-section {
    margin: 2rem 0;
}

.video-section video {
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* ======================== */
/* Scrollbar Styling        */
/* ======================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}