/* ==========================================
   MODERN PROFESSIONAL WEBSITE STYLES
   Navy + Cyan Glassmorphism Theme
   ========================================== */

:root {
    /* Navy Gradient Palette */
    --bg-100: #0a192f;
    --bg-200: #112240;
    --bg-300: #1d3557;
    --bg-400: #233554;

    /* Primary Colors */
    --primary-100: #1a365d;
    --primary-200: #2c5282;
    --primary-300: #3182ce;

    /* Accent Colors - Cyan Teal */
    --accent-100: #64ffda;
    --accent-200: #4fd1c5;
    --accent-300: #38b2ac;

    /* Text Colors */
    --text-100: #e6f1ff;
    --text-200: #a8b2d1;
    --text-300: #8892b0;

    /* Glassmorphism */
    --glass-bg: rgba(17, 34, 64, 0.75);
    --glass-bg-light: rgba(29, 53, 87, 0.5);
    --glass-border: rgba(100, 255, 218, 0.1);
    --glass-border-hover: rgba(100, 255, 218, 0.3);

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #0a192f 0%, #112240 50%, #1a365d 100%);
    --gradient-accent: linear-gradient(135deg, #64ffda 0%, #4fd1c5 100%);
    --gradient-card: linear-gradient(145deg, rgba(17, 34, 64, 0.8), rgba(10, 25, 47, 0.9));

    /* Typography */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.7;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;

    /* Borders */
    --border-radius: 12px;
    --border-radius-lg: 20px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(100, 255, 218, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==========================================
   RESET & BASE
   ========================================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    background: var(--bg-100);
    color: var(--text-200);
    line-height: var(--line-height-base);
    font-size: var(--font-size-base);
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(100, 255, 218, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(49, 130, 206, 0.05) 0%, transparent 50%),
        var(--gradient-hero);
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite alternate;
}

@keyframes backgroundShift {
    0% {
        opacity: 1;
    }

    100% {
        opacity: 0.9;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

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

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

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

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease forwards;
}

/* Staggered Animations */
.stagger-1 {
    animation-delay: 0.1s;
}

.stagger-2 {
    animation-delay: 0.2s;
}

.stagger-3 {
    animation-delay: 0.3s;
}

.stagger-4 {
    animation-delay: 0.4s;
}

.stagger-5 {
    animation-delay: 0.5s;
}

/* ==========================================
   LINKS & TYPOGRAPHY
   ========================================== */

a {
    color: var(--accent-100);
    text-decoration: none;
    transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
    color: var(--accent-200);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-100);
    font-weight: 600;
    line-height: 1.3;
}

/* ==========================================
   LAYOUT
   ========================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-100);
    font-weight: 700;
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.logo-container:hover {
    transform: scale(1.02);
    color: var(--text-100);
}

.logo-img {
    height: 42px;
    width: auto;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--text-200);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-100);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav-links a:hover {
    color: var(--accent-100);
}

.nav-links a:hover::after {
    width: 80%;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 1px solid var(--glass-border);
}

.lang-switcher a {
    font-size: 0.85rem;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.lang-switcher a.active {
    color: var(--accent-100);
    background: rgba(100, 255, 218, 0.1);
}

/* Hamburger Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-100);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

#menu-checkbox {
    display: none;
}

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

#menu-checkbox:checked~.menu-toggle span:nth-child(2) {
    opacity: 0;
}

#menu-checkbox:checked~.menu-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        background: var(--bg-200);
        backdrop-filter: blur(20px);
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        transition: right var(--transition-base);
        border-left: 1px solid var(--glass-border);
    }

    #menu-checkbox:checked~.nav-links {
        right: 0;
    }

    .nav-links a {
        font-size: 1.2rem;
        width: 100%;
        text-align: center;
    }

    .lang-switcher {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        padding-top: var(--spacing-md);
        border-top: 1px solid var(--glass-border);
    }
}

/* ==========================================
   MAIN CONTENT
   ========================================== */

main {
    padding-top: 80px;
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(100, 255, 218, 0.05) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: pulse 8s ease-in-out infinite;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    animation: fadeInUp 0.8s ease forwards;
}

.hero h1 .highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.35rem);
    color: var(--text-200);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s forwards;
    opacity: 0;
}

/* ==========================================
   SECTIONS
   ========================================== */

.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: var(--spacing-lg);
    color: var(--text-100);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    margin-top: var(--spacing-sm);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-300);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient-accent);
    color: var(--bg-100);
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-md);
    color: var(--bg-100);
}

.btn:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent-100);
    color: var(--accent-100);
    box-shadow: none;
}

.btn-secondary:hover {
    background: rgba(100, 255, 218, 0.1);
    color: var(--accent-100);
}

.btn-ghost {
    background: transparent;
    color: var(--text-200);
    padding: var(--spacing-sm) var(--spacing-md);
    box-shadow: none;
}

.btn-ghost:hover {
    color: var(--accent-100);
    background: transparent;
    box-shadow: none;
}

/* ==========================================
   CARDS
   ========================================== */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--glass-border-hover);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    font-size: 1.35rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-100);
}

.card p {
    color: var(--text-200);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.card-tagline {
    font-size: 0.95rem;
    color: var(--accent-100);
    margin-bottom: var(--spacing-sm);
}

.card .btn-ghost {
    margin-top: auto;
    align-self: flex-start;
}

/* Lab Cards (Experimental) */
.card-lab {
    border-style: dashed;
    background: transparent;
}

.card-lab::before {
    background: linear-gradient(90deg, var(--accent-100), var(--primary-300));
}

/* ==========================================
   TAGS
   ========================================== */

.tag {
    display: inline-block;
    font-size: 0.8rem;
    padding: 4px 12px;
    background: rgba(100, 255, 218, 0.1);
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: 20px;
    margin-right: 6px;
    margin-top: 6px;
    color: var(--accent-100);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(100, 255, 218, 0.2);
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   PROFILE / ABOUT SECTION
   ========================================== */

.profile-card {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--glass-border);
}

@media (max-width: 768px) {
    .profile-card {
        flex-direction: column;
        text-align: center;
    }
}

.profile-image {
    flex: 0 0 180px;
}

.profile-image img {
    width: 100%;
    border-radius: 50%;
    border: 3px solid var(--accent-100);
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition-base);
}

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

.profile-content {
    flex: 1;
}

.profile-content p {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   FEATURED SECTION
   ========================================== */

.featured-section {
    background: var(--glass-bg-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--glass-border);
}

/* ==========================================
   SOCIAL LINKS
   ========================================== */

.social-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(100, 255, 218, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    color: var(--text-100);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: rgba(100, 255, 218, 0.2);
    border-color: var(--accent-100);
    color: var(--accent-100);
    transform: translateY(-2px);
}

.social-link i {
    font-size: 1.1rem;
}

/* ==========================================
   FOOTER
   ========================================== */

footer {
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-300);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-100);
}

.footer-copy {
    color: var(--text-300);
    font-size: 0.9rem;
}

/* ==========================================
   PROSE / BLOG CONTENT
   ========================================== */

.prose {
    max-width: 720px;
    margin: 0 auto;
}

.prose h1,
.prose h2,
.prose h3 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.prose h1 {
    font-size: 2.5rem;
}

.prose h2 {
    font-size: 1.75rem;
}

.prose h3 {
    font-size: 1.35rem;
}

.prose p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-200);
    font-size: 1.1rem;
    line-height: 1.8;
}

.prose ul,
.prose ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-lg);
}

.prose li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-200);
}

.prose code {
    background: var(--glass-bg);
    padding: 3px 8px;
    border-radius: 6px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.9em;
    border: 1px solid var(--glass-border);
}

.prose pre {
    background: var(--bg-200);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--glass-border);
}

.prose pre code {
    background: transparent;
    padding: 0;
    border: none;
}

.prose blockquote {
    border-left: 3px solid var(--accent-100);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    color: var(--text-300);
    font-style: italic;
}

.prose a {
    color: var(--accent-100);
    text-decoration: underline;
    text-decoration-color: rgba(100, 255, 218, 0.3);
    text-underline-offset: 3px;
}

.prose a:hover {
    text-decoration-color: var(--accent-100);
}

/* ==========================================
   BLOG ARTICLE LIST
   ========================================== */

.article-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-item {
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-fast);
}

.article-item:hover {
    padding-left: var(--spacing-md);
}

.article-item h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.article-item:hover h2 {
    color: var(--accent-100);
}

.article-link {
    color: var(--accent-100);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ==========================================
   BACK LINK
   ========================================== */

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-300);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-fast);
}

.back-link:hover {
    color: var(--accent-100);
    transform: translateX(-4px);
}

/* ==========================================
   IMPACT CARD (Case Study)
   ========================================== */

.impact-card {
    background: var(--gradient-accent);
    color: var(--bg-100);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

.impact-card h3 {
    color: var(--bg-100);
    margin-bottom: var(--spacing-sm);
}

.impact-card p {
    color: var(--bg-100);
    font-size: 1.2rem;
    font-weight: 600;
}

/* ==========================================
   RESPONSIVE GRID UTILS
   ========================================== */

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

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

/* ==========================================
   UTILITIES
   ========================================== */

.text-center {
    text-align: center;
}

.text-accent {
    color: var(--accent-100);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

/* Hide/Show utilities */
.hide-mobile {
    display: block;
}

.show-mobile {
    display: none;
}

@media (max-width: 768px) {
    .hide-mobile {
        display: none;
    }

    .show-mobile {
        display: block;
    }
}

/* ==========================================
   COOKIE CONSENT BANNER
   ========================================== */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    padding: var(--spacing-md);
    transform: translateY(100%);
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
}

.cookie-banner.visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.cookie-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.cookie-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    color: var(--accent-100);
}

.cookie-content p {
    flex: 1;
    color: var(--text-200);
    font-size: 0.95rem;
    line-height: 1.5;
    margin: 0;
}

.cookie-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.cookie-buttons .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .cookie-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .cookie-icon {
        display: none;
    }

    .cookie-buttons {
        width: 100%;
        flex-direction: column;
    }

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