/* ═══════════════════════════════════════════════════════════════════════════
   MigraineTracker - Premium Dark Theme CSS
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── CSS Variables / Design Tokens ───────────────────────────────────────── */
:root {
    /* Colors */
    --bg-primary: #0f0f1a;
    --bg-secondary: #161625;
    --bg-card: rgba(22, 22, 37, 0.85);
    --bg-card-hover: rgba(30, 30, 50, 0.9);
    --text-primary: #e8e8f0;
    --text-secondary: #8888a8;
    --text-muted: #5a5a78;

    /* Accent Colors */
    --accent-primary: #7c5cfc;
    --accent-primary-glow: rgba(124, 92, 252, 0.4);
    --accent-secondary: #5eead4;
    --migraine-color: #f43f5e;
    --migraine-glow: rgba(244, 63, 94, 0.35);
    --migraine-bg: rgba(244, 63, 94, 0.15);
    --today-color: #38bdf8;
    --today-glow: rgba(56, 189, 248, 0.35);
    --success-color: #34d399;
    --warning-color: #fbbf24;

    /* Glass Effect */
    --glass-bg: rgba(22, 22, 37, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Spacing */
    --nav-height: 60px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode overrides */
[data-bs-theme="light"] {
    --bg-primary: #f0f0f8;
    --bg-secondary: #e8e8f0;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.95);
    --text-primary: #1a1a2e;
    --text-secondary: #555570;
    --text-muted: #8888a0;
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(0, 0, 0, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --accent-primary: #6d4cf5;
    --migraine-color: #e11d48;
    --migraine-glow: rgba(225, 29, 72, 0.25);
    --migraine-bg: rgba(225, 29, 72, 0.1);
    --today-color: #0284c7;
    --today-glow: rgba(2, 132, 199, 0.25);
}

/* ─── Global Styles ──────────────────────────────────────────────────────── */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    touch-action: manipulation;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: clamp(14px, 3.5vw, 16px);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated gradient background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 20%, rgba(124, 92, 252, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(244, 63, 94, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(94, 234, 212, 0.04) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

main {
    flex: 1;
}

/* ─── Glass Effect ───────────────────────────────────────────────────────── */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--glass-shadow);
    padding: 1.25rem;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-alert {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
}

/* ─── Navigation ─────────────────────────────────────────────────────────── */
.glass-nav {
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 0.5rem 0;
    z-index: 1000;
}

.brand-icon {
    font-size: 1.6rem;
    filter: drop-shadow(0 0 8px var(--accent-primary-glow));
}

.brand-text {
    font-weight: 700;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-nav {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-nav:hover,
.btn-nav:focus {
    background: rgba(124, 92, 252, 0.1);
    color: var(--accent-primary);
    border-color: rgba(124, 92, 252, 0.2);
}

.btn-nav.active {
    background: rgba(124, 92, 252, 0.15);
    color: var(--accent-primary);
    border-color: rgba(124, 92, 252, 0.3);
}

/* ─── Auth Page ──────────────────────────────────────────────────────────── */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 120px);
    padding: 1rem;
}

.auth-card {
    max-width: 420px;
    width: 100%;
    padding: 2rem;
    animation: slideUp 0.5s ease-out;
}

.auth-logo {
    font-size: 4rem;
    margin-bottom: 0.5rem;
    animation: pulse 2s infinite;
    filter: drop-shadow(0 0 16px var(--accent-primary-glow));
}

.auth-title {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.glass-input {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.glass-input:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-primary-glow);
    color: var(--text-primary);
}

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

.btn-primary-glow {
    background: linear-gradient(135deg, var(--accent-primary), #9b7cfc);
    border: none;
    color: white;
    font-weight: 600;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 20px var(--accent-primary-glow);
    transition: all var(--transition-normal);
}

.btn-primary-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-primary-glow);
    background: linear-gradient(135deg, #8b6cfc, #ab8cfc);
    color: white;
}

.btn-primary-glow:active {
    transform: translateY(0);
}

.auth-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* ─── Calendar ───────────────────────────────────────────────────────────── */
.calendar-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding: 1rem;
}

.calendar-title-wrapper {
    text-align: center;
    flex: 1;
}

.calendar-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

#today-btn {
    font-size: 0.75rem;
    margin-top: 0.25rem;
    border-radius: var(--radius-sm);
    padding: 0.2rem 0.6rem;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 0.75rem;
    padding: 0.75rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.25rem;
}

.stat-divider {
    width: 1px;
    height: 30px;
    background: var(--glass-border);
}

/* Calendar Grid */
.calendar-grid {
    padding: 1rem;
}

.calendar-day-names {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 8px;
}

.calendar-day-names span {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.4rem 0;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    min-height: 280px;
}

.calendar-loading {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.day-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: all var(--transition-fast);
    min-height: 48px;
    min-width: 48px;
    user-select: none;
    -webkit-user-select: none;
}

.day-cell:hover {
    background: rgba(124, 92, 252, 0.1);
    transform: scale(1.05);
}

.day-cell:active {
    transform: scale(0.95);
}

.day-cell.empty {
    cursor: default;
    pointer-events: none;
}

.day-cell.today {
    border: 2px solid var(--today-color);
    box-shadow: 0 0 12px var(--today-glow);
    font-weight: 700;
}

.day-cell.migraine {
    background: var(--migraine-bg);
    color: var(--migraine-color);
    font-weight: 700;
    box-shadow: 0 0 12px var(--migraine-glow);
    border: 1px solid rgba(244, 63, 94, 0.3);
}

.day-cell.migraine::after {
    content: '';
    position: absolute;
    bottom: 4px;
    width: 6px;
    height: 6px;
    background: var(--migraine-color);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--migraine-color);
}

.day-cell.migraine.today {
    border: 2px solid var(--migraine-color);
    box-shadow: 0 0 16px var(--migraine-glow), 0 0 8px var(--today-glow);
}

.day-cell.future {
    opacity: 0.4;
    cursor: default;
    pointer-events: none;
}

/* Toggle animation */
.day-cell.toggling {
    animation: togglePulse 0.4s ease-out;
}

/* Legend */
.calendar-legend {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.75rem;
    padding: 0.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.legend-migraine {
    background: var(--migraine-color);
    box-shadow: 0 0 6px var(--migraine-glow);
}

.legend-today {
    background: var(--today-color);
    box-shadow: 0 0 6px var(--today-glow);
}

/* ─── Reports ────────────────────────────────────────────────────────────── */
.reports-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.page-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.summary-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    transition: transform var(--transition-fast);
}

.summary-card:hover {
    transform: translateY(-2px);
}

.summary-icon {
    font-size: 1.5rem;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(124, 92, 252, 0.12);
    color: var(--accent-primary);
    flex-shrink: 0;
}

.summary-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.summary-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
}

.summary-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-top: 0.15rem;
}

/* Chart */
.report-chart {
    margin-bottom: 1rem;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 120px;
    padding: 0.5rem 0;
    overflow-x: auto;
}

.chart-bar {
    flex: 1;
    min-width: 12px;
    max-width: 40px;
    background: linear-gradient(to top, var(--accent-primary), rgba(124, 92, 252, 0.5));
    border-radius: 4px 4px 0 0;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
}

.chart-bar:hover {
    background: linear-gradient(to top, var(--migraine-color), rgba(244, 63, 94, 0.5));
    transform: scaleY(1.05);
}

.chart-bar .chart-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    white-space: nowrap;
    margin-bottom: 4px;
    border: 1px solid var(--glass-border);
    z-index: 10;
}

.chart-bar:hover .chart-tooltip {
    display: block;
}

/* Report Table */
.report-table {
    margin-bottom: 1rem;
}

.report-table .table {
    color: var(--text-primary);
    margin-bottom: 0;
}

.report-table .table thead th {
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    padding: 0.75rem;
}

.report-table .table tbody td {
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    padding: 0.75rem;
    vertical-align: middle;
}

.report-table .table tbody tr:hover td {
    background: rgba(124, 92, 252, 0.05);
}

.interval-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.interval-short {
    background: rgba(244, 63, 94, 0.15);
    color: var(--migraine-color);
}

.interval-normal {
    background: rgba(124, 92, 252, 0.15);
    color: var(--accent-primary);
}

.interval-long {
    background: rgba(52, 211, 153, 0.15);
    color: var(--success-color);
}

/* ─── Duration Badge ─────────────────────────────────────────────────────── */
.duration-badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(94, 234, 212, 0.15);
    color: var(--accent-secondary);
}

/* ─── PWA Install Button ─────────────────────────────────────────────────── */
.install-pulse {
    animation: installGlow 2s ease-in-out infinite;
}

@keyframes installGlow {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(94, 234, 212, 0.4);
    }

    50% {
        box-shadow: 0 0 12px 4px rgba(94, 234, 212, 0.2);
        border-color: var(--accent-secondary);
        color: var(--accent-secondary);
    }
}

#pwa-install-btn:not(.d-none) {
    color: var(--accent-secondary);
    border-color: rgba(94, 234, 212, 0.3);
}

/* ─── Footer ─────────────────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--glass-border);
}

/* ─── Animations ─────────────────────────────────────────────────────────── */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

@keyframes togglePulse {
    0% {
        transform: scale(1);
    }

    30% {
        transform: scale(0.85);
    }

    60% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Day cells appear with animation */
.day-cell {
    animation: fadeIn 0.3s ease-out;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .calendar-header {
        padding: 0.75rem;
    }

    .calendar-title {
        font-size: 1.1rem;
    }

    .day-cell {
        font-size: 0.85rem;
        min-height: 42px;
        min-width: 42px;
    }

    .report-summary {
        grid-template-columns: 1fr;
    }

    .summary-card {
        padding: 0.75rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .auth-logo {
        font-size: 3rem;
    }

    .auth-title {
        font-size: 1.5rem;
    }
}

@media (min-width: 768px) {
    .report-summary {
        grid-template-columns: repeat(4, 1fr);
    }

    .day-cell {
        font-size: 1rem;
        border-radius: var(--radius-md);
    }

    .glass-card {
        padding: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .calendar-wrapper {
        max-width: 650px;
    }

    .reports-wrapper {
        max-width: 800px;
    }
}

/* ─── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(124, 92, 252, 0.3);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(124, 92, 252, 0.5);
}

/* ─── Selection ──────────────────────────────────────────────────────────── */
::selection {
    background: rgba(124, 92, 252, 0.3);
    color: var(--text-primary);
}