/* CSS Custom Properties & Reset */
:root {
    --bg-dark: #0d0f12;
    --bg-darker: #08090a;
    --bg-panel: rgba(26, 29, 36, 0.6);
    --text-primary: #ffffff;
    --text-secondary: #D8DBE2;
    --accent-cyan: #00F0FF;
    --accent-blue: #1E90FF;
    --font-main: 'Inter', sans-serif;
    --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.4);
    --glow-blue: 0 0 15px rgba(30, 144, 255, 0.4);
    --border-glass: 1px solid rgba(255, 255, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-secondary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, .text-primary {
    color: var(--text-primary);
    font-weight: 800;
}

.text-cyan { color: var(--accent-cyan); }
.text-glow {
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Animations (applied via JS IntersectionObserver) */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Glassmorphism Panels */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border-glass);
    border-radius: 12px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-main);
    text-align: center;
    border: none;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-darker);
    box-shadow: 0 4px 14px rgba(255, 255, 255, 0.2);
    transition: all 0.3s;
}

.btn-primary:hover {
    background: var(--text-secondary);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-large {
    background: var(--accent-cyan);
    color: #000;
    box-shadow: var(--glow-cyan);
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-large:hover {
    background: #fff;
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.6);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
    background: rgba(0, 240, 255, 0.1);
    box-shadow: var(--glow-cyan);
}

.btn-block {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(13, 15, 18, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: var(--border-glass);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    color: var(--text-primary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: radial-gradient(circle at center top, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                var(--bg-dark);
}

.grid-bg {
    background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
    width: 100%;
    text-align: center;
    padding: 80px 0;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    max-width: 800px;
    margin: 0 auto 48px;
}

/* Manifesto Section */
.manifesto {
    padding: 100px 0;
    background: var(--bg-darker);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
}

.manifesto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.manifesto-card {
    padding: 40px 30px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s;
}

.manifesto-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 240, 255, 0.3);
}

.card-number {
    position: absolute;
    top: -10px;
    right: 10px;
    font-size: 8rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
    z-index: 0;
}

.manifesto-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.manifesto-card p {
    position: relative;
    z-index: 1;
}

/* Equation Section */
.equation {
    padding: 120px 0;
}

.equation-visual {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 24px;
    margin-top: 40px;
}

.equation-element {
    padding: 30px 40px;
    text-align: center;
    min-width: 250px;
}

.equation-element.glow-cyan {
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.05);
}

.equation-element.glow-blue {
    border-color: rgba(30, 144, 255, 0.2);
    box-shadow: inset 0 0 20px rgba(30, 144, 255, 0.05);
}

.tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.equation-operator {
    font-size: 3rem;
    font-weight: 300;
    color: var(--text-secondary);
}

.equation-result {
    font-size: 2rem;
    padding: 20px 40px;
    border-bottom: 2px solid var(--accent-cyan);
}

/* Apply Section */
.apply {
    padding: 100px 0;
    background: var(--bg-darker);
    display: flex;
    justify-content: center;
}

.apply-container {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 60px;
}

.apply-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.apply-form {
    width: 100%;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.05);
}

.form-group select option {
    background: var(--bg-darker);
    color: var(--text-primary);
}

/* Footer */
.footer {
    padding: 60px 0;
    border-top: var(--border-glass);
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-quote {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.footer-social a {
    display: inline-block;
    margin: 0 12px;
    color: var(--text-secondary);
}

.footer-social a:hover {
    color: var(--accent-cyan);
}

/* Responsive */
@media (max-width: 992px) {
    .apply-container {
        grid-template-columns: 1fr;
        padding: 40px 24px;
    }
}

@media (max-width: 768px) {
    .equation-visual {
        flex-direction: column;
    }
    
    .equation-operator {
        transform: rotate(90deg);
        margin: -10px 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .apply-container {
        padding: 30px 20px;
    }
}