/* ============================================
   UNCERTAIN SYSTEMS - MAIN STYLESHEET
   Númenor-inspired aesthetic with sci-fi fusion
   ============================================ */

/* ============================================
   CSS VARIABLES / DESIGN TOKENS
   ============================================ */
:root {
    /* Core Colors - Númenor palette */
    --marble-white: #F5F5F5;
    --sea-indigo: #003366;
    --gold: #D4AF37;
    --forest-green: #228B22;
    --neon-cyan: #00FFFF;
    --slate-gray: #708090;
    --bronze: #CD7F32;
    
    /* Extended palette */
    --deep-indigo: #001a33;
    --mist-white: rgba(245, 245, 245, 0.8);
    --gold-light: rgba(212, 175, 55, 0.2);
    --cyan-glow: rgba(0, 255, 255, 0.3);
    --shadow-dark: rgba(0, 26, 51, 0.4);
    
    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'Jost', sans-serif;
    
    /* Spacing scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;
    
    /* Container widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* ============================================
   CSS RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.6;
    color: var(--sea-indigo);
    background-color: var(--marble-white);
    overflow-x: hidden;
}

img, video, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    font-size: 1rem;
    line-height: 1.7;
}

.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }

/* Metallic gradient text effect */
.text-metallic {
    background: linear-gradient(
        135deg,
        var(--gold) 0%,
        var(--bronze) 50%,
        var(--gold) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-glow {
    text-shadow: 
        0 0 20px var(--gold-light),
        0 0 40px rgba(212, 175, 55, 0.1);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

section {
    padding: var(--space-3xl) 0;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(245, 245, 245, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 51, 102, 0.1);
    transition: background var(--transition-base);
}

.nav-dark {
    background: rgba(0, 26, 51, 0.9);
    border-bottom-color: rgba(212, 175, 55, 0.2);
}

.nav-dark .nav-link {
    color: var(--marble-white);
    opacity: 0.8;
}

.nav-dark .nav-link:hover {
    opacity: 1;
    color: var(--gold);
}

.nav-dark .logo-text {
    color: var(--marble-white);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
    height: 72px;
}

@media (min-width: 768px) {
    .nav-container {
        padding: var(--space-sm) var(--space-lg);
    }
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--gold);
    text-shadow: 0 0 10px var(--gold-light);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--sea-indigo);
}

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

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--sea-indigo);
    opacity: 0.8;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    opacity: 1;
    color: var(--gold);
}

.nav-link-github {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.github-icon {
    width: 18px;
    height: 18px;
}

/* ============================================
   HERO SECTION (Landing Page)
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 72px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: 
        url('../assets/images/hero-bg.jpg') center top / cover no-repeat,
        linear-gradient(180deg, #1a3a5c 0%, #0d2440 50%, #061a2e 100%);
    background-size: cover, 100% 100%;
}

/* Dark overlay for text readability */
.hero-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(180deg, 
            rgba(0, 26, 51, 0.6) 0%,
            rgba(0, 26, 51, 0.5) 30%,
            rgba(0, 26, 51, 0.3) 60%,
            rgba(245, 245, 245, 0.5) 85%,
            rgba(245, 245, 245, 1) 100%
        );
}

/* Center focus overlay */
.hero-background::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 50% 50%, rgba(0, 26, 51, 0.4) 0%, transparent 70%);
}

/* Stars layer */
.stars {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, var(--gold) 1px, transparent 2px),
        radial-gradient(2px 2px at 40% 70%, var(--gold) 1px, transparent 2px),
        radial-gradient(1px 1px at 60% 20%, var(--gold) 0.5px, transparent 1px),
        radial-gradient(2px 2px at 80% 50%, var(--gold) 1px, transparent 2px),
        radial-gradient(1px 1px at 10% 80%, var(--gold) 0.5px, transparent 1px),
        radial-gradient(1px 1px at 90% 10%, var(--gold) 0.5px, transparent 1px),
        radial-gradient(1px 1px at 50% 90%, var(--gold) 0.5px, transparent 1px);
    opacity: 0.4;
    animation: twinkle 8s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.6; }
}

/* Mist effect */
.mist {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 50% 100%, rgba(245, 245, 245, 0.9) 0%, transparent 60%);
    animation: mist-drift 20s ease-in-out infinite;
}

@keyframes mist-drift {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(20px); }
}

/* Constellation pattern */
.constellation {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='400' height='400' viewBox='0 0 400 400' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='100' cy='100' r='2' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Ccircle cx='200' cy='50' r='1.5' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Ccircle cx='300' cy='100' r='2' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Ccircle cx='150' cy='200' r='1.5' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Ccircle cx='250' cy='200' r='1.5' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Ccircle cx='200' cy='300' r='2' fill='%23D4AF37' fill-opacity='0.3'/%3E%3Cpath d='M100 100 L200 50 L300 100 M150 200 L200 300 L250 200' stroke='%23D4AF37' stroke-opacity='0.1' stroke-width='0.5'/%3E%3C/svg%3E");
    background-size: 400px 400px;
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 var(--space-md);
}

.hero-badge {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--gold);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    animation: fade-in-up 0.8s ease-out;
    background: rgba(0, 26, 51, 0.6);
    backdrop-filter: blur(4px);
}

.hero-title {
    margin-bottom: var(--space-md);
    animation: fade-in-up 0.8s ease-out 0.1s backwards;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.title-line {
    display: block;
    color: var(--marble-white);
}

.title-accent {
    background: linear-gradient(
        135deg,
        var(--gold) 0%,
        #f0d78c 50%,
        var(--gold) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 2px 10px rgba(212, 175, 55, 0.5));
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--marble-white);
    margin-bottom: var(--space-lg);
    animation: fade-in-up 0.8s ease-out 0.2s backwards;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.4);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--marble-white);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    animation: fade-in-up 0.8s ease-out 0.3s backwards;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.5);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    color: var(--marble-white);
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid rgba(245, 245, 245, 0.5);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    animation: fade-in-up 0.8s ease-out 0.4s backwards;
    background: rgba(0, 51, 102, 0.5);
    backdrop-filter: blur(4px);
}

.hero-cta:hover {
    background: var(--gold);
    color: var(--deep-indigo);
    border-color: var(--gold);
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
}

.cta-arrow {
    width: 16px;
    height: 16px;
    animation: bounce-down 2s ease-in-out infinite;
}

@keyframes bounce-down {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(4px); }
}

/* Palantír orb effect */
.hero-orb {
    position: absolute;
    right: 10%;
    bottom: 20%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: 
        radial-gradient(circle at 30% 30%, 
            rgba(0, 255, 255, 0.2) 0%, 
            transparent 50%),
        radial-gradient(circle at 50% 50%, 
            rgba(212, 175, 55, 0.1) 0%, 
            var(--sea-indigo) 100%);
    box-shadow: 
        0 0 60px var(--cyan-glow),
        0 0 100px rgba(0, 51, 102, 0.3),
        inset 0 0 60px rgba(0, 255, 255, 0.1);
    opacity: 0.6;
    animation: orb-pulse 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes orb-pulse {
    0%, 100% { 
        transform: scale(1);
        opacity: 0.6;
    }
    50% { 
        transform: scale(1.05);
        opacity: 0.8;
    }
}

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

/* ============================================
   VISION SECTION
   ============================================ */
.vision {
    background: 
        linear-gradient(180deg, 
            rgba(235, 235, 240, 1) 0%,
            var(--marble-white) 100%
        );
    padding: var(--space-4xl) 0;
}

.vision-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: var(--space-sm);
}

.section-title {
    color: var(--sea-indigo);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--slate-gray);
    margin-top: var(--space-sm);
}

.vision-content {
    display: grid;
    gap: var(--space-3xl);
}

.vision-manifesto {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.manifesto-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--sea-indigo);
    margin-bottom: var(--space-lg);
}

.manifesto-text em {
    font-style: italic;
    color: var(--gold);
}

.vision-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.pillar {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 51, 102, 0.1);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.pillar:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--shadow-dark);
    border-color: var(--gold);
}

.pillar-icon {
    font-size: 2rem;
    color: var(--gold);
    margin-bottom: var(--space-md);
    text-shadow: 0 0 20px var(--gold-light);
}

.pillar-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    color: var(--sea-indigo);
    margin-bottom: var(--space-sm);
}

.pillar-text {
    font-size: 0.9375rem;
    color: var(--slate-gray);
}

/* ============================================
   STACK SECTION (Project Cards)
   ============================================ */
.stack {
    background: var(--sea-indigo);
    padding: var(--space-4xl) 0;
    position: relative;
    overflow: hidden;
}

.stack::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 0%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(0, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.stack .section-label,
.stack .section-title,
.stack .section-subtitle {
    color: var(--marble-white);
}

.stack .section-label {
    color: var(--gold);
}

.stack-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    position: relative;
    z-index: 1;
}

.stack-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    position: relative;
    z-index: 1;
}

/* Omega Quest spans both columns on desktop */
.project-card-wide {
    grid-column: 1 / -1;
    background: url('../assets/images/omega-quest-card.jpg') center right / cover no-repeat !important;
    position: relative;
    min-height: 400px;
}

.project-card-wide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to right,
        rgba(0, 51, 102, 0.95) 0%,
        rgba(0, 51, 102, 0.85) 40%,
        rgba(0, 51, 102, 0.6) 70%,
        rgba(0, 51, 102, 0.4) 100%
    );
    border-radius: inherit;
    z-index: 1;
}

.project-card-wide > * {
    position: relative;
    z-index: 2;
}

@media (max-width: 768px) {
    .stack-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card-wide {
        grid-column: auto;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--deep-indigo);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer-brand .logo-icon {
    color: var(--gold);
}

.footer-brand .logo-text {
    color: var(--marble-white);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--marble-white);
    opacity: 0.7;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--gold);
}

.footer-badge {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.badge-text {
    color: var(--gold);
    font-weight: 600;
}

.badge-year {
    color: var(--marble-white);
    opacity: 0.5;
}

.footer-bottom {
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-tagline {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--marble-white);
    opacity: 0.5;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in-up {
    animation: fade-in-up 0.6s ease-out forwards;
}

/* Scroll-triggered animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays for children */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children > *:nth-child(6) { transition-delay: 500ms; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
    :root {
        --space-3xl: 4rem;
        --space-4xl: 5rem;
    }
    
    .nav-links {
        gap: var(--space-md);
    }
    
    .nav-link:not(.nav-link-github) {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.625rem;
        padding: var(--space-xs) var(--space-sm);
    }
    
    .hero-cta {
        font-size: 0.75rem;
        padding: var(--space-sm) var(--space-md);
    }
}