/* === PeptideHub — Clean Medical/Health Aesthetic === */

:root {
    /* Type */
    --font-display: 'Cabinet Grotesk', sans-serif;
    --font-body: 'Satoshi', 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark mode (default — deep navy blue) */
[data-theme="dark"] {
    --bg: #060b1f;
    --bg-alt: #0a1228;
    --surface: #0d1633;
    --surface-2: #111d3a;
    --border: #1e2d52;
    --text: #d6dfee;
    --text-muted: #7a8aaf;
    --text-faint: #4a5a7a;
    --primary: #4c8bf5;
    --primary-hover: #3a7be0;
    --primary-dim: rgba(76, 139, 245, 0.12);
    --accent: #6db5ff;
    --accent-dim: rgba(109, 181, 255, 0.12);
    --danger: #ef4444;
    --danger-dim: rgba(239, 68, 68, 0.12);
    --warning: #f59e0b;
    --warning-dim: rgba(245, 158, 11, 0.12);
    --success: #22c55e;
    --success-dim: rgba(34, 197, 94, 0.12);
    --nav-bg: rgba(6, 11, 31, 0.9);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    --color-primary: #4c8bf5;
}

/* Light mode */
[data-theme="light"] {
    --bg: #f0f4fa;
    --bg-alt: #e8eef6;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #c8d4e6;
    --text: #1a2332;
    --text-muted: #5a6573;
    --text-faint: #9aa5b1;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-dim: rgba(37, 99, 235, 0.08);
    --accent: #0288d1;
    --accent-dim: rgba(2, 136, 209, 0.08);
    --danger: #dc2626;
    --danger-dim: rgba(220, 38, 38, 0.08);
    --warning: #d97706;
    --warning-dim: rgba(217, 119, 6, 0.08);
    --success: #16a34a;
    --success-dim: rgba(22, 163, 74, 0.08);
    --nav-bg: rgba(255, 255, 255, 0.85);
    --shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
    --color-primary: #2563eb;
}

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

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

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
    position: relative;
}

/* Molecular background pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400' viewBox='0 0 400 400'%3E%3Cg fill='none' stroke='%234c8bf5' stroke-width='1' opacity='0.06'%3E%3Ccircle cx='50' cy='80' r='6'/%3E%3Ccircle cx='150' cy='50' r='5'/%3E%3Ccircle cx='250' cy='100' r='7'/%3E%3Ccircle cx='350' cy='60' r='5'/%3E%3Ccircle cx='100' cy='180' r='6'/%3E%3Ccircle cx='200' cy='200' r='8'/%3E%3Ccircle cx='300' cy='170' r='5'/%3E%3Ccircle cx='50' cy='300' r='7'/%3E%3Ccircle cx='180' cy='320' r='5'/%3E%3Ccircle cx='280' cy='280' r='6'/%3E%3Ccircle cx='370' cy='350' r='5'/%3E%3Ccircle cx='120' cy='370' r='6'/%3E%3Cline x1='50' y1='80' x2='150' y2='50'/%3E%3Cline x1='150' y1='50' x2='250' y2='100'/%3E%3Cline x1='250' y1='100' x2='350' y2='60'/%3E%3Cline x1='50' y1='80' x2='100' y2='180'/%3E%3Cline x1='100' y1='180' x2='200' y2='200'/%3E%3Cline x1='200' y1='200' x2='300' y2='170'/%3E%3Cline x1='300' y1='170' x2='350' y2='60'/%3E%3Cline x1='200' y1='200' x2='280' y2='280'/%3E%3Cline x1='100' y1='180' x2='50' y2='300'/%3E%3Cline x1='50' y1='300' x2='180' y2='320'/%3E%3Cline x1='180' y1='320' x2='280' y2='280'/%3E%3Cline x1='280' y1='280' x2='370' y2='350'/%3E%3Cline x1='180' y1='320' x2='120' y2='370'/%3E%3Cline x1='250' y1='100' x2='200' y2='200'/%3E%3C/g%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 400px 400px;
    opacity: 1;
    pointer-events: none;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

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

/* === Navigation === */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.logo svg { color: var(--primary); }

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

.nav-links a {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.theme-toggle, .menu-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.theme-toggle:hover, .menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.menu-toggle { display: none; }

/* === Hero === */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: var(--space-3xl) var(--space-lg);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, var(--primary-dim) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 30%, var(--accent-dim) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--primary-dim);
    border: 1px solid var(--primary);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: var(--space-lg);
}

.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--space-lg);
}

.hero p {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats div {
    text-align: center;
}

.hero-stats strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--primary);
}

.hero-stats div:not(:last-child)::after {
    content: '';
    display: inline-block;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-dim);
}

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

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

.btn-full { width: 100%; }

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
}

/* === Section Common === */
section {
    padding: var(--space-3xl) 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
}

.section-sub {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

.badge-free {
    display: inline-block;
    padding: 2px 10px;
    background: var(--success-dim);
    color: var(--success);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: var(--font-body);
    vertical-align: middle;
    margin-left: var(--space-sm);
}

/* === Features === */
.features { background: var(--bg-alt); }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.feature-icon {
    color: var(--primary);
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

/* === Tracker === */
.tracker-section { background: var(--bg); }

.tracker-app {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.tracker-full { grid-column: 1 / -1; }

.tracker-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.tracker-panel h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.panel-header h3 { margin-bottom: 0; }

/* Forms */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    padding: var(--space-md);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    transition: border-color var(--transition);
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-dim);
}

.form-control::placeholder { color: var(--text-faint); }

/* Peptide List */
.peptide-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.peptide-item {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    transition: all var(--transition);
}

.peptide-item:hover { border-color: var(--primary); }

.peptide-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.peptide-item-name {
    font-weight: 700;
    font-size: 1rem;
}

.peptide-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.peptide-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.tag-site { background: var(--accent-dim); color: var(--accent); }
.tag-dose { background: var(--primary-dim); color: var(--primary); }
.tag-freq { background: var(--warning-dim); color: var(--warning); }

.peptide-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.peptide-actions button {
    flex: 1;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition);
}

.peptide-actions button:hover { border-color: var(--primary); color: var(--primary); }
.peptide-actions .btn-log:hover { border-color: var(--success); color: var(--success); }
.peptide-actions .btn-delete:hover { border-color: var(--danger); color: var(--danger); }

.next-dose {
    margin-top: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--primary-dim);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--primary);
    font-weight: 500;
}

/* Dose History */
.dose-history {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-height: 400px;
    overflow-y: auto;
}

.dose-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.dose-entry-info { display: flex; flex-direction: column; gap: 2px; }
.dose-entry-name { font-weight: 600; font-size: 0.9375rem; }
.dose-entry-meta { font-size: 0.75rem; color: var(--text-muted); }
.dose-entry-time { font-size: 0.75rem; color: var(--text-faint); }

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-muted);
}

.empty-state .muted { font-size: 0.8125rem; color: var(--text-faint); }

/* === Guide === */
.guide-section { background: var(--bg-alt); }

.guide-langs {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.lang-btn {
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition);
}

.lang-btn:hover { border-color: var(--primary); }
.lang-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.guide-preview {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--space-lg);
    align-items: start;
}

.guide-toc {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: sticky;
    top: 80px;
}

.guide-toc h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.toc-list {
    list-style: none;
    counter-reset: chapter;
}

.toc-list li {
    counter-increment: chapter;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition);
}

.toc-list li:hover { color: var(--primary); }
.toc-list li::before { content: counter(chapter) ". "; font-weight: 700; color: var(--primary); }

.guide-locked {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
}

.lock-icon {
    color: var(--text-faint);
    margin-bottom: var(--space-md);
    display: flex;
    justify-content: center;
}

.lock-icon.small svg { width: 24px; height: 24px; }

.guide-locked h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.guide-locked > p {
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.guide-preview-content {
    text-align: left;
    background: var(--surface-2);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    max-height: 300px;
    overflow: hidden;
    position: relative;
}

.guide-preview-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--surface));
}

/* Full Guide Content */
.guide-full { margin-top: var(--space-xl); }

.guide-chapter {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.guide-chapter h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--primary);
}

.guide-chapter h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    margin: var(--space-lg) 0 var(--space-sm);
}

.guide-chapter p {
    margin-bottom: var(--space-md);
    color: var(--text);
    line-height: 1.7;
}

.guide-chapter ul, .guide-chapter ol {
    margin-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

.guide-chapter li {
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.guide-chapter .callout {
    background: var(--warning-dim);
    border-left: 3px solid var(--warning);
    padding: var(--space-md) var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: var(--space-lg) 0;
    font-size: 0.875rem;
}

.guide-chapter .callout-danger {
    background: var(--danger-dim);
    border-left-color: var(--danger);
}

.guide-chapter .callout-info {
    background: var(--accent-dim);
    border-left-color: var(--accent);
}

/* Peptide Protocol Card */
.protocol-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
}

.protocol-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--primary);
}

.protocol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.protocol-detail {
    font-size: 0.8125rem;
}

.protocol-detail strong {
    display: block;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2px;
}

/* === Nutrition === */
.nutrition-section { background: var(--bg); }

.nutrition-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.nutrition-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.nutrition-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.nutrition-card > p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.macro-calc { display: flex; flex-direction: column; gap: var(--space-md); }

.macro-results {
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    background: var(--surface-2);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.macro-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border);
}

.macro-item:last-child { border-bottom: none; }

.macro-label { color: var(--text-muted); font-size: 0.875rem; }
.macro-value { font-weight: 700; font-family: var(--font-display); color: var(--primary); }

.nutrition-locked {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.nutrition-features {
    list-style: none;
    text-align: left;
    margin: var(--space-lg) 0;
    width: 100%;
}

.nutrition-features li {
    padding: var(--space-sm) 0;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

/* === Pricing === */
.pricing-section { background: var(--bg-alt); }

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

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

.pricing-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.pricing-featured {
    border-color: var(--primary);
    border-width: 2px;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
}

.pricing-header { text-align: center; margin-bottom: var(--space-lg); }

.pricing-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.price {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
}

.price-sub {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 4px;
}

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

.pricing-features li {
    padding: var(--space-sm) 0;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.pricing-features li:last-child { border-bottom: none; }

.pricing-note {
    text-align: center;
    margin-top: var(--space-xl);
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* === Disclaimer === */
.disclaimer-section { background: var(--bg); }

.disclaimer-card {
    background: var(--surface);
    border: 2px solid var(--warning);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.disclaimer-card .section-title { color: var(--warning); }

.disclaimer-content p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
    color: var(--text);
}

.disclaimer-content strong { color: var(--warning); }

.disclaimer-footer {
    text-align: center;
    margin-top: var(--space-lg);
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* === FAQ === */
.faq-section { background: var(--bg-alt); }

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9375rem;
    list-style: none;
    position: relative;
    padding-right: var(--space-2xl);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: var(--space-lg);
    font-size: 1.25rem;
    color: var(--primary);
    transition: transform var(--transition);
}

.faq-item[open] summary::after { transform: rotate(45deg); }

.faq-item p {
    padding: 0 var(--space-lg) var(--space-md);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* === Footer === */
.footer {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    padding: var(--space-2xl) 0 var(--space-lg);
}

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

.footer-brand .logo { margin-bottom: var(--space-md); }
.footer-brand p { color: var(--text-muted); font-size: 0.875rem; max-width: 300px; }

.footer-links {
    display: flex;
    gap: var(--space-2xl);
    justify-content: flex-end;
}

.footer-links h4 {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-links a {
    display: block;
    color: var(--text);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
    transition: color var(--transition);
}

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

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

.footer-bottom p {
    color: var(--text-faint);
    font-size: 0.75rem;
}

/* === Responsive === */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .menu-toggle { display: flex; }
    
    .nav-links.open {
        display: flex;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--surface);
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--border);
    }
    
    .tracker-app { grid-template-columns: 1fr; }
    .guide-preview { grid-template-columns: 1fr; }
    .guide-toc { position: static; }
    .nutrition-preview { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .footer-links { justify-content: flex-start; }
    .form-row { grid-template-columns: 1fr; }
    .hero-cta { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* === Premium Feature Styles === */
.premium-section {
    position: relative;
    overflow: hidden;
}

.premium-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.premium-header h3 {
    margin: 0;
}

.badge-premium {
    background: linear-gradient(135deg, #00b8a3, #00867d);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
}

.premium-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.premium-card {
    background: var(--color-surface-2, rgba(255,255,255,0.03));
    border: 1px solid var(--color-divider, rgba(255,255,255,0.06));
    border-radius: 12px;
    padding: 20px;
}

.premium-card-header h4 {
    margin: 0 0 8px;
    font-size: 16px;
}

.premium-desc {
    font-size: 13px;
    opacity: 0.6;
    margin: 0 0 14px;
}

.muted-sm {
    font-size: 13px;
    opacity: 0.4;
    text-align: center;
    padding: 16px 0;
}

.reminder-list, .journal-list, .cycle-list {
    margin-top: 12px;
}

.reminder-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: rgba(0,184,163,0.06);
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 13px;
}

.reminder-item .reminder-time {
    color: var(--color-primary);
    font-weight: 600;
}

.reminder-status {
    margin-top: 12px;
    padding: 10px;
    background: rgba(255,193,7,0.08);
    border: 1px solid rgba(255,193,7,0.2);
    border-radius: 8px;
    font-size: 12px;
    display: none;
}

.reminder-status.visible {
    display: block;
}

.journal-input {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}

.form-sm {
    font-size: 13px !important;
    padding: 6px 10px !important;
}

.journal-entry {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-divider);
    font-size: 13px;
}

.journal-entry:last-child {
    border-bottom: none;
}

.severity-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sev-1 { background: #4caf50; }
.sev-2 { background: #8bc34a; }
.sev-3 { background: #ff9800; }
.sev-4 { background: #f57c00; }
.sev-5 { background: #d32f2f; }

.cycle-item {
    margin-bottom: 14px;
}

.cycle-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 13px;
}

.progress-bar {
    height: 8px;
    background: rgba(255,255,255,0.06);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00b8a3, #00d4aa);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.analytics-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.analytics-stat {
    text-align: center;
    padding: 12px 8px;
    background: rgba(0,184,163,0.06);
    border-radius: 8px;
}

.analytics-num {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.analytics-label {
    font-size: 11px;
    opacity: 0.5;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dose-chart {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 80px;
    padding: 8px 0;
}

.dose-bar {
    flex: 1;
    background: linear-gradient(180deg, #00b8a3, rgba(0,184,163,0.3));
    border-radius: 3px 3px 0 0;
    min-height: 4px;
    position: relative;
    transition: height 0.3s ease;
}

.dose-bar:hover {
    background: #00d4aa;
}

.dose-bar-label {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 9px;
    opacity: 0.4;
    white-space: nowrap;
}

/* Premium Lock Overlay */
.premium-lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10,14,20,0.92);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    z-index: 10;
    transition: opacity 0.3s;
}

.premium-lock-overlay.unlocked {
    display: none;
}

.tracker-lock-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10,14,20,0.95);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    z-index: 20;
}

.tracker-app { position: relative; }
#guide-full { scroll-margin-top: 90px; }

.premium-lock-content {
    text-align: center;
    max-width: 480px;
    padding: 32px;
}

.lock-icon-large {
    color: var(--color-primary);
    margin-bottom: 16px;
    opacity: 0.5;
}

.premium-lock-content h3 {
    font-size: 22px;
    margin: 0 0 8px;
}

.premium-lock-content > p {
    font-size: 14px;
    opacity: 0.6;
    margin: 0 0 20px;
}

.premium-features-list {
    text-align: left;
    margin: 0 auto 24px;
    max-width: 360px;
}

.pf-item {
    font-size: 13px;
    padding: 4px 0;
    opacity: 0.8;
}

.premium-hint {
    font-size: 12px;
    opacity: 0.4;
    margin-top: 16px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

/* Free tier limit warning */
.limit-warning {
    background: rgba(255,152,0,0.1);
    border: 1px solid rgba(255,152,0,0.3);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 12px;
    font-size: 13px;
    display: none;
}

.limit-warning.visible {
    display: block;
}

.limit-warning a {
    color: var(--color-primary);
    font-weight: 600;
}

/* Upgrade badge in tracker */
.upgrade-badge {
    display: inline-block;
    background: linear-gradient(135deg, #00b8a3, #00867d);
    color: #fff;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 8px;
    vertical-align: middle;
    font-weight: 600;
}

@media (max-width: 768px) {
    .premium-grid { grid-template-columns: 1fr; }
    .analytics-content { grid-template-columns: repeat(2, 1fr); }
    .journal-input { grid-template-columns: 1fr; }
    .referral-card { grid-template-columns: 1fr !important; }
    .loyalty-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .referral-right { border-left: none !important; border-top: 1px solid var(--color-divider); padding-top: 20px !important; }
}

/* === Trial Banner (removed) === */

/* === Pricing Badge (removed) === */

/* === Referral Program === */
.referral-section { margin-top: 48px; }

.referral-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-divider);
    border-radius: 16px;
    overflow: hidden;
}

.referral-left { padding: 32px; }
.referral-icon { color: var(--color-primary); margin-bottom: 16px; }
.referral-left h3 { font-size: 22px; margin: 0 0 8px; }
.referral-left > p { font-size: 14px; opacity: 0.7; margin: 0 0 20px; line-height: 1.6; }

.referral-link-box { display: flex; gap: 8px; margin-bottom: 20px; }

.referral-input {
    flex: 1;
    background: var(--color-bg);
    border: 1px solid var(--color-divider);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--color-text);
    font-family: monospace;
}

.referral-stats { display: flex; gap: 24px; }
.ref-stat { text-align: center; }
.ref-num { display: block; font-size: 28px; font-weight: 700; color: var(--color-primary); }
.ref-label { font-size: 11px; opacity: 0.5; text-transform: uppercase; letter-spacing: 0.5px; }

.referral-right {
    padding: 32px;
    background: rgba(0,184,163,0.04);
    border-left: 1px solid var(--color-divider);
}

.referral-right h4 { margin: 0 0 16px; font-size: 16px; }

.ref-step {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
    font-size: 14px;
    opacity: 0.8;
}

.ref-step-num {
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}

/* === Loyalty Badges === */
.loyalty-section { margin-top: 48px; }

.loyalty-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.loyalty-badge {
    background: var(--color-surface);
    border: 1px solid var(--color-divider);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    position: relative;
    overflow: hidden;
    opacity: 0.5;
    filter: grayscale(0.8);
    transition: all 0.3s ease;
}

.loyalty-badge.unlocked {
    opacity: 1;
    filter: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 20px rgba(0,184,163,0.1);
}

.loyalty-badge.unlocked::after {
    content: '✓';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

.badge-icon { font-size: 32px; margin-bottom: 8px; }
.badge-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.badge-desc { font-size: 12px; opacity: 0.5; margin-bottom: 8px; }

.badge-reward {
    font-size: 11px;
    color: var(--color-primary);
    font-weight: 600;
    padding: 4px 8px;
    background: rgba(0,184,163,0.08);
    border-radius: 6px;
    display: inline-block;
}

/* === Nav Auth === */
.nav-auth {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-user {
    display: flex;
    gap: 10px;
    align-items: center;
}

.user-greeting {
    font-size: 14px;
    color: var(--text-muted);
}

.user-greeting strong {
    color: var(--primary);
}

/* === Auth Modal === */
.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 400px;
    width: 100%;
    position: relative;
    box-shadow: var(--shadow);
}

.auth-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
}

.auth-close:hover {
    color: var(--text);
}

.auth-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--surface-2);
    border-radius: var(--radius-md);
    padding: 4px;
}

.auth-tab {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.auth-tab.active {
    background: var(--primary);
    color: #fff;
}

.auth-form .form-group {
    margin-bottom: 16px;
}

.auth-form label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-muted);
}

.auth-error {
    color: var(--danger);
    font-size: 13px;
    margin-top: 12px;
    text-align: center;
    min-height: 18px;
}

.auth-note {
    text-align: center;
    font-size: 12px;
    color: var(--text-faint);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.auth-links {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 12px;
    font-size: 13px;
}
.auth-links a {
    color: var(--primary);
    text-decoration: none;
}
.auth-links a:hover {
    text-decoration: underline;
}
.auth-links span {
    color: var(--text-faint);
}
.auth-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}
.auth-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}
.auth-back {
    display: block;
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--primary);
    text-decoration: none;
}
.auth-back:hover {
    text-decoration: underline;
}
.auth-success {
    color: var(--success);
    text-align: center;
    font-size: 14px;
    margin-top: 12px;
}
.auth-form.hide-tabs .auth-tabs {
    display: none;
}

@media (max-width: 640px) {
    .nav-auth { display: none; }
    .nav-user { display: none !important; }
}

/* Account Section */
.account-section {
    padding: 60px 0;
}
.account-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    max-width: 600px;
    margin: 0 auto;
}
.account-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.account-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.account-header h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
}
.account-email {
    color: var(--text-muted);
    font-size: 14px;
    margin: 4px 0 0;
}
.account-details {
    margin-bottom: 28px;
}
.account-detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}
.account-detail-row:last-child {
    border-bottom: none;
}
.account-label {
    color: var(--text-muted);
    font-size: 14px;
}
.account-value {
    font-weight: 600;
    font-size: 14px;
}
.account-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Guide Purchase Card */
.guide-purchase-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-top: 32px;
}
.guide-purchase-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}
.guide-purchase-inner h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 4px;
}
.guide-purchase-inner p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
    max-width: 500px;
}
.guide-buy-options {
    margin-top: 16px;
    text-align: center;
}
.guide-buy-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
}
.guide-buy-note a {
    color: var(--primary);
}