/* ─────────────────────────────────────────────────────────────────────────────
   GymVise Premium Dark Mode & Glassmorphism Theme (iOS HIG Inspired)
────────────────────────────────────────────────────────────────────────────── */

:root {
    /* Brand Colors */
    --accent: #FF453A;       /* Apple HIG iOS Red/Orange */
    --accent-hover: #FF6961;
    --accent-glow: rgba(255, 69, 58, 0.4);

    /* Premium Dark Theme */
    --bg: #000000;
    --card: rgba(28, 28, 30, 0.6);        /* Translucent Dark */
    --elevated: rgba(44, 44, 46, 0.8);
    
    /* Glassmorphism Tokens */
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-highlight: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.6);
    --nav-bg: rgba(0, 0, 0, 0.65);

    /* Typography (High Contrast) */
    --text-primary: #FFFFFF;
    --text-secondary: rgba(235, 235, 245, 0.6);
    --text-tertiary: rgba(235, 235, 245, 0.3);
}

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

html {
    scroll-behavior: smooth;
    background: var(--bg);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Add a subtle background radial glow for that premium feel */
    background-image: radial-gradient(circle at 50% -20%, rgba(255, 69, 58, 0.15) 0%, transparent 60%);
    background-attachment: fixed;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Navigation (Glassmorphism)
────────────────────────────────────────────────────────────────────────────── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    background: var(--nav-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hide the old theme toggle since we are forced premium dark mode */
.theme-toggle {
    display: none !important;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Typography & Layout
────────────────────────────────────────────────────────────────────────────── */
.page-content {
    padding: 140px 0 80px;
    min-height: 100vh;
}

.page-header {
    text-align: center;
    margin-bottom: 80px;
}

.page-header h1 {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 800;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.page-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Buttons
────────────────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 100px; /* iOS pill shape */
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    border: none;
    min-height: 52px;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 8px 20px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px var(--accent-glow);
}

.btn-secondary {
    background: var(--card);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--elevated);
    border-color: var(--glass-border-highlight);
    transform: translateY(-2px);
}

/* ─────────────────────────────────────────────────────────────────────────────
   Glass Feature Cards
────────────────────────────────────────────────────────────────────────────── */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px 32px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--glass-shadow);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

/* Subtle inner glow on hover */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at top left, rgba(255,255,255,0.05), transparent 60%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--glass-border-highlight);
    box-shadow: 0 20px 40px rgba(0,0,0,0.8);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--accent), #FF2D55);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
    box-shadow: 0 8px 16px var(--accent-glow);
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Stats Section
────────────────────────────────────────────────────────────────────────────── */
.stats {
    padding: 80px 0;
    background: var(--card);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    margin: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -2px;
    background: linear-gradient(135deg, #FFFFFF, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 15px;
    font-weight: 500;
    color: var(--accent);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ─────────────────────────────────────────────────────────────────────────────
   Footer
────────────────────────────────────────────────────────────────────────────── */
footer {
    padding: 60px 0;
    border-top: 1px solid var(--glass-border);
    margin-top: 80px;
    background: rgba(0,0,0,0.8);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copy {
    font-size: 14px;
    color: var(--text-tertiary);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   Responsive
────────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .feature-card {
        padding: 32px 24px;
    }
}