/* ============================================
   Variables CSS & Reset
   ============================================ */
:root {
    --color-bg:        #0f1117;
    --color-surface:   #1a1d27;
    --color-surface-2: #242836;
    --color-border:    #2e3345;
    --color-text:      #e2e4ed;
    --color-text-dim:  #8a8fa8;
    --color-accent:    #f0a030;
    --color-accent-2:  #e06040;
    --color-accent-3:  #40c0a0;
    --color-accent-4:  #6080f0;
    --radius:          12px;
    --radius-sm:       8px;
    --shadow:          0 4px 24px rgba(0,0,0,0.3);
    --transition:      0.3s ease;
    --font:            'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono:       'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Header
   ============================================ */
header {
    text-align: center;
    padding: 2rem 1rem 1rem;
    background: linear-gradient(180deg, var(--color-surface) 0%, transparent 100%);
}

header h1 {
    font-size: clamp(1.4rem, 4vw, 2.2rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.2rem;
}

.subtitle {
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

/* ============================================
   Main
   ============================================ */
main {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem 3rem;
    flex: 1;
}

/* ============================================
   Contrôles
   ============================================ */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    align-items: flex-end;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
    min-width: 120px;
}

.control-group label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.control-group input,
.control-group select {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    padding: 0.5rem 0.7rem;
    font-size: 0.95rem;
    font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(240, 160, 48, 0.15);
}

#calculateBtn {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0.6rem 1.4rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    white-space: nowrap;
    min-height: 40px;
    align-self: flex-end;
}

#calculateBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(240, 160, 48, 0.3);
}

#calculateBtn:active { transform: translateY(0); }

/* ============================================
   Onglets
   ============================================ */
.tabs {
    display: flex;
    gap: 0.3rem;
    margin-bottom: 0;
}

.tab-btn {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-bottom: none;
    border-radius: var(--radius) var(--radius) 0 0;
    color: var(--color-text-dim);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    font-family: var(--font);
}

.tab-btn:hover {
    color: var(--color-text);
    background: var(--color-surface-2);
}

.tab-btn.active {
    background: var(--color-surface-2);
    color: var(--color-accent);
    border-color: var(--color-border);
    border-bottom: 1px solid var(--color-surface-2);
    position: relative;
    z-index: 1;
}

.tab-content {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 0 var(--radius) var(--radius) var(--radius);
    padding: 1.2rem;
    animation: fadeIn 0.3s ease;
}

/* ============================================
   Stats Panel
   ============================================ */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    transition: border-color var(--transition), transform var(--transition);
}

.stat-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-dim);
    margin-bottom: 0.3rem;
}

.stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent);
}

.stat-detail {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-dim);
    margin-top: 0.15rem;
}

/* ============================================
   Chart
   ============================================ */
.chart-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 420px;
}

/* ============================================
   Tableaux
   ============================================ */
.table-section {
    max-height: 70vh;
    overflow-y: auto;
}

.table-scroll {
    overflow-x: auto;
}

.month-group {
    margin-bottom: 1.5rem;
}

.month-title {
    font-size: 1.1rem;
    color: var(--color-accent);
    margin-bottom: 0.6rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--color-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.data-table th {
    background: var(--color-surface);
    color: var(--color-text-dim);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.4rem;
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 2;
    white-space: nowrap;
}

.data-table td {
    padding: 0.35rem 0.4rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    white-space: nowrap;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.data-table tbody tr:hover {
    background: rgba(240, 160, 48, 0.05);
}

.day-num {
    font-weight: 700;
    color: var(--color-text);
    font-family: var(--font);
    font-size: 0.85rem;
}

.day-name {
    color: var(--color-text-dim);
    font-size: 0.72rem;
    font-family: var(--font);
}

.time {
    color: var(--color-accent-4);
}

.duration {
    color: var(--color-accent);
    font-weight: 600;
}

.diff-up {
    color: #50d080;
}

.diff-down {
    color: #e06050;
}

.azimuth {
    color: var(--color-text-dim);
    font-size: 0.75rem;
}

/* ============================================
   Vue mensuelle
   ============================================ */
.monthly-view {
    max-height: 75vh;
    overflow-y: auto;
}

.month-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.nav-btn {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover:not(:disabled) {
    background: var(--color-surface-2);
    border-color: var(--color-accent);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.month-nav-title {
    font-size: 1.2rem;
    color: var(--color-accent);
    min-width: 200px;
    text-align: center;
}

.month-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.6rem;
    margin-bottom: 1.2rem;
}

.stat-mini {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.7rem;
    text-align: center;
}

.stat-mini-label {
    display: block;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-dim);
    margin-bottom: 0.25rem;
}

.stat-mini {
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-accent);
}

.stat-mini-tooltip {
    display: inline-block;
    margin-left: 2px;
    font-size: 0.7rem;
    cursor: help;
    color: var(--color-text-dim);
    position: relative;
}

.stat-mini-tooltip:hover::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.4rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 400;
    font-family: var(--font);
    white-space: nowrap;
    z-index: 100;
    box-shadow: var(--shadow);
    margin-bottom: 4px;
}

.calendar-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
    margin-bottom: 1.5rem;
}

.calendar-table th {
    background: var(--color-surface);
    color: var(--color-text-dim);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.4rem;
    border-bottom: 2px solid var(--color-border);
    text-align: left;
}

.calendar-table td,
.data-table td {
    padding: 0.4rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    white-space: nowrap;
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.calendar-table tbody tr:hover {
    background: rgba(240, 160, 48, 0.05);
}

.today-row {
    background: rgba(240, 160, 48, 0.1) !important;
    border-left: 3px solid var(--color-accent);
}

.day-cell {
    font-family: var(--font) !important;
    font-weight: 600;
    color: var(--color-text);
}

.section-title {
    font-size: 1rem;
    color: var(--color-accent);
    margin: 1.5rem 0 0.8rem;
}

.week-chart-container {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    height: 250px;
}

/* ============================================
   Info Panel
   ============================================ */
.info-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.2rem;
    margin-top: 1rem;
}

.info-panel h2 {
    font-size: 1rem;
    margin-bottom: 0.6rem;
    color: var(--color-accent);
}

.info-panel p {
    margin-bottom: 0.6rem;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.info-panel ul {
    list-style: none;
    padding: 0;
}

.info-panel li {
    padding: 0.3rem 0;
    color: var(--color-text-dim);
    font-size: 0.85rem;
}

.info-panel li strong { color: var(--color-text); }

/* ============================================
   Footer
   ============================================ */
footer {
    text-align: center;
    padding: 1.2rem 1rem;
    color: var(--color-text-dim);
    font-size: 0.75rem;
    border-top: 1px solid var(--color-border);
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
}

footer a:hover { text-decoration: underline; }

/* ============================================
   Utilitaires
   ============================================ */
.no-data {
    color: var(--color-text-dim);
    text-align: center;
    padding: 3rem 1rem;
    font-size: 0.95rem;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .controls { flex-direction: column; align-items: stretch; }
    .control-group { min-width: unset; }
    #calculateBtn { align-self: stretch; }
    .chart-container { height: 300px; }
    .stats { grid-template-columns: repeat(2, 1fr); }
    .tabs { flex-wrap: wrap; }
    .tab-btn { flex: 1; text-align: center; padding: 0.5rem 0.6rem; font-size: 0.8rem; }
    .data-table { font-size: 0.75rem; }
    .data-table th, .data-table td { padding: 0.3rem 0.25rem; }
    .month-nav-title { font-size: 1rem; min-width: 150px; }
}

@media (max-width: 480px) {
    .stats { grid-template-columns: 1fr; }
    .chart-container { height: 250px; }
    .month-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}