/* ============================================
   IRON PULSE - Design System
   Volcanic Glass + Acid Neon Fusion
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Volcanic Glass with Neon Accents */
    --color-bg: #0A0A0A;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1A1A1A;
    --color-surface: #1F1F1F;
    --color-surface-hover: #2A2A2A;
    
    --color-text: #FFFFFF;
    --color-text-secondary: #A0A0A0;
    --color-text-muted: #666666;
    
    --color-accent: #FF6B2B;
    --color-accent-hover: #FF8552;
    --color-accent-glow: rgba(255, 107, 43, 0.3);
    
    --color-neon: #CCFF00;
    --color-neon-dim: rgba(204, 255, 0, 0.1);
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --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;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Typography
   ============================================ */

.section-tag {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

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

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--color-accent-glow);
}

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

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* ============================================
   Navigation
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 0.05em;
}

.logo-icon {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-links a {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-4xl) var(--space-lg);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(255, 107, 43, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(204, 255, 0, 0.05) 0%, transparent 40%),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(255, 255, 255, 0.02) 50px, rgba(255, 255, 255, 0.02) 51px),
        repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(255, 255, 255, 0.02) 50px, rgba(255, 255, 255, 0.02) 51px);
    opacity: 0.5;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 700;
    line-height: 0.95;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-lg);
}

.hero-title .line {
    display: block;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

.hero-title .accent {
    color: var(--color-accent);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.4s;
    opacity: 0;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

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

.hero-stats {
    position: absolute;
    bottom: var(--space-3xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-3xl);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 1s;
    opacity: 0;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
}

.stat-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 1.2s;
    opacity: 0;
}

.scroll-indicator span {
    font-size: 0.625rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: var(--space-4xl) 0;
    background-color: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-content {
    max-width: 540px;
}

.about-content .section-title {
    margin-bottom: var(--space-lg);
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-size: 1.0625rem;
}

.about-features {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.feature {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.feature-text h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.feature-text p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
}

.image-placeholder {
    aspect-ratio: 4/5;
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-hover) 100%);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(255, 107, 43, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(204, 255, 0, 0.05) 0%, transparent 50%);
}

.image-accent {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-lg);
    z-index: -1;
}

/* ============================================
   Classes Section
   ============================================ */

.classes {
    padding: var(--space-4xl) 0;
    background-color: var(--color-bg);
}

.section-header {
    margin-bottom: var(--space-3xl);
}

.section-header.centered {
    text-align: center;
}

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

.class-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.class-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.class-card.featured {
    border-color: var(--color-accent);
}

.class-image {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-surface) 100%);
    position: relative;
    overflow: hidden;
}

.class-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 107, 43, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(204, 255, 0, 0.08) 0%, transparent 40%);
}

.class-content {
    padding: var(--space-lg);
}

.class-level {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--color-neon-dim);
    color: var(--color-neon);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.class-content h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.class-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.class-link {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
    transition: color var(--transition-fast);
}

.class-link:hover {
    color: var(--color-accent-hover);
}

/* ============================================
   Trainers Section
   ============================================ */

.trainers {
    padding: var(--space-4xl) 0;
    background-color: var(--color-bg-secondary);
}

.trainers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.trainer-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.trainer-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.trainer-image {
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-surface) 100%);
    position: relative;
    overflow: hidden;
}

.trainer-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 50% 0%, rgba(255, 107, 43, 0.1) 0%, transparent 50%);
}

.trainer-info {
    padding: var(--space-lg);
}

.trainer-info h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.trainer-role {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.trainer-bio {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ============================================
   Membership Section
   ============================================ */

.membership {
    padding: var(--space-4xl) 0;
    background-color: var(--color-bg);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    align-items: flex-start;
}

.pricing-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.pricing-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.pricing-card.featured {
    border-color: var(--color-accent);
    background: linear-gradient(180deg, var(--color-surface) 0%, rgba(255, 107, 43, 0.05) 100%);
    transform: scale(1.05);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    color: var(--color-bg);
    font-size: 0.625rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.pricing-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.pricing-price {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-xs);
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.pricing-price .amount {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
}

.pricing-price .period {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    align-self: flex-end;
    margin-bottom: var(--space-sm);
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-xl);
}

.pricing-features li {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--space-lg);
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-neon);
    font-weight: 600;
}

/* ============================================
   CTA Section
   ============================================ */

.cta {
    position: relative;
    padding: var(--space-4xl) 0;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 50% 50%, rgba(255, 107, 43, 0.1) 0%, transparent 60%),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 50%, var(--color-bg) 100%);
    z-index: -1;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.cta-text {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.cta-form {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.cta-form input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.cta-form input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.cta-form input::placeholder {
    color: var(--color-text-muted);
}

.cta-note {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: var(--space-3xl) 0 var(--space-lg);
    background-color: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    max-width: 300px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

.footer-links h4,
.footer-hours h4 {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-md);
}

.footer-links ul,
.footer-hours ul {
    list-style: none;
}

.footer-links li,
.footer-hours li {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.footer-links a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-hours li {
    display: flex;
    justify-content: space-between;
}

.footer-hours span {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ============================================
   Animations
   ============================================ */

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

@keyframes scrollPulse {
    0%, 100% {
        opacity: 1;
        transform: scaleY(1);
    }
    50% {
        opacity: 0.5;
        transform: scaleY(0.8);
    }
}

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

@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .about-image {
        order: -1;
    }
    
    .trainers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav .btn {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
        position: static;
        margin-top: var(--space-2xl);
        transform: none;
    }
    
    .classes-grid {
        grid-template-columns: 1fr;
    }
    
    .trainers-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}