:root {
    --bg-primary: #0a0d14;
    --bg-secondary: #121622;
    --accent-blue: #00f2fe;
    --accent-purple: #4facfe;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.08);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header & Nav */
.header {
    background: rgba(10, 13, 20, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-accent {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-sub {
    font-size: 12px;
    font-weight: 400;
    vertical-align: super;
    margin-left: 2px;
    opacity: 0.6;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: #000;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 242, 254, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.btn-text {
    background: transparent;
    color: var(--accent-blue);
    text-decoration: none;
}

.btn-text:hover {
    opacity: 0.8;
}

.btn-block {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 96px 0;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15), transparent 70%);
    filter: blur(50px);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
}

.badge {
    display: inline-block;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid rgba(0, 242, 254, 0.2);
    color: var(--accent-blue);
    padding: 6px 12px;
    border-radius: 99px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 24px;
    font-family: var(--font-heading);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 54px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-description {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

/* Glass Card & Visuals */
.hero-visual {
    display: flex;
    justify-content: center;
}

.glass-card {
    background: rgba(18, 22, 34, 0.4);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.glass-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #ef4444;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.4; }
    100% { transform: scale(0.9); opacity: 1; }
}

.fitness-image-placeholder {
    height: 240px;
    background: linear-gradient(rgba(10, 13, 20, 0.8), rgba(10, 13, 20, 0.9)),
                repeating-linear-gradient(0deg, rgba(0, 242, 254, 0.05) 0px, rgba(0, 242, 254, 0.05) 1px, transparent 1px, transparent 2px);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.scanline {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(0, 242, 254, 0.3);
    animation: scan 3s linear infinite;
}

@keyframes scan {
    0% { top: 0; }
    100% { top: 100%; }
}

.fit-text {
    font-family: var(--font-heading);
    color: rgba(0, 242, 254, 0.4);
    font-weight: 800;
    letter-spacing: 4px;
    font-size: 14px;
}

.glass-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
}

.trainer-name {
    display: block;
    font-weight: 600;
    font-size: 14px;
}

.trainer-title {
    font-size: 11px;
    color: var(--text-secondary);
}

.time-elapsed {
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--accent-blue);
    font-weight: 600;
}

/* Features Section */
.features {
    padding: 96px 0;
    background-color: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 64px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 242, 254, 0.2);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 20px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(5, 7, 10, 0.85);
    backdrop-filter: blur(16px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

.modal-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    width: 100%;
    max-width: 400px;
    position: relative;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 24px;
    margin-bottom: 12px;
}

.modal-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
}

input {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 12px 16px;
    font-family: inherit;
    font-size: 14px;
    outline: none;
}

input:focus {
    border-color: var(--accent-blue);
}

.login-error-msg {
    color: #ef4444;
    font-size: 12px;
    margin-top: 16px;
    display: none;
}

.login-error-msg.active {
    display: block;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 13px;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

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

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }
    .hero-actions {
        justify-content: center;
    }
    .grid {
        grid-template-columns: 1fr;
    }
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}