/* ☀️ SolsticeTilt — Deep Solar Navy & Sun Gold Theme */
:root {
    --bg-primary: #060e1a;
    --bg-surface: #0f2038;
    --bg-hover: #162c4c;
    --bg-card: #0a1628;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #f59e0b;
    --accent-gold: #fbbf24;
    --accent-glow: rgba(245, 158, 11, 0.2);
    --border: #1e3a5f;
    --border-glow: #38bdf8;
    --sky-blue: #38bdf8;
    --sun-orange: #f97316;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.app-header {
    background: linear-gradient(180deg, rgba(15, 32, 56, 0.8) 0%, rgba(6, 14, 26, 1) 100%);
    border-bottom: 1px solid var(--border);
    padding: 2.5rem 1rem 2rem;
    text-align: center;
}

.header-container {
    max-width: 900px;
    margin: 0 auto;
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--accent-gold);
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.app-header h1 {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    font-weight: 800;
    margin: 0;
    background: linear-gradient(135deg, #ffffff 0%, #fbbf24 50%, #f97316 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.15rem;
    margin: 0.5rem 0 0;
}

.app-main {
    max-width: 1140px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.calculator-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.75rem;
    box-shadow: var(--card-shadow);
}

/* Preset Buttons Section */
.preset-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.75rem;
}

.preset-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.75rem 0.85rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
}

.preset-btn:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
    transform: translateY(-2px);
}

.preset-btn.active {
    border-color: var(--accent-gold);
    background: rgba(245, 158, 11, 0.15);
    box-shadow: 0 0 12px var(--accent-glow);
}

.preset-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.preset-spec {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    margin-top: 0.2rem;
}

/* Main Grid Layout */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 860px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
}

.controls-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.input-group label, .input-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.tooltip-icon {
    color: var(--text-muted);
    cursor: help;
    font-size: 0.85rem;
}

.input-with-slider {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.input-with-slider input[type="number"] {
    width: 90px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--accent-gold);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 600;
    padding: 0.6rem 0.75rem;
    text-align: center;
}

.input-with-slider input[type="number"]:focus {
    outline: none;
    border-color: var(--sky-blue);
    box-shadow: 0 0 8px rgba(56, 189, 248, 0.3);
}

.input-with-slider input[type="range"] {
    flex: 1;
    accent-color: var(--accent-gold);
}

/* Toggle Group for Hemisphere */
.toggle-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.toggle-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    padding: 0.65rem 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.toggle-btn:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.toggle-btn.active {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--sky-blue);
    color: var(--sky-blue);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.2);
}

/* Strategy Selector */
.strategy-selector {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.strategy-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.strategy-btn:hover {
    border-color: var(--accent-gold);
    background: var(--bg-hover);
}

.strategy-btn.active {
    border-color: var(--accent-gold);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(249, 115, 22, 0.1) 100%);
    box-shadow: 0 0 12px var(--accent-glow);
}

.strategy-title {
    display: block;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.strategy-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.info-callout {
    background: rgba(15, 32, 56, 0.6);
    border: 1px solid var(--border);
    border-left: 4px solid var(--sky-blue);
    border-radius: 8px;
    padding: 0.9rem 1rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.callout-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--sky-blue);
    margin-bottom: 0.3rem;
}

/* Results Column */
.results-summary-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1.5rem;
}

.card-subtitle {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    margin: 0 0 1.25rem;
    color: var(--text-primary);
}

.angle-cards-grid {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.angle-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    position: relative;
}

.angle-badge {
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.summer-card .angle-badge { color: var(--accent-gold); }
.equinox-card .angle-badge { color: var(--sky-blue); }
.winter-card .angle-badge { color: #60a5fa; }

.angle-value {
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.2rem 0;
}

.angle-subtext {
    font-size: 0.82rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

.angle-desc {
    font-size: 0.84rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
}

/* Yield Comparison Bars */
.yield-comparison-box {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.box-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

.yield-bars {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.yield-bar-row {
    display: grid;
    grid-template-columns: 120px 1fr 50px;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.85rem;
}

.yield-bar-row.highlight .yield-label {
    color: var(--accent-gold);
    font-weight: 700;
}

.yield-track {
    background: rgba(255, 255, 255, 0.06);
    border-radius: 9999px;
    height: 12px;
    overflow: hidden;
}

.yield-fill {
    height: 100%;
    border-radius: 9999px;
    transition: width 0.4s ease;
}

.fixed-fill { background: var(--text-muted); }
.pos2-fill { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.pos4-fill { background: linear-gradient(90deg, #38bdf8, #22c55e); }
.tracking-fill { background: rgba(255, 255, 255, 0.25); }

.yield-val {
    font-family: var(--font-mono);
    font-weight: 700;
    text-align: right;
}

.yield-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    font-style: italic;
}

/* Solar Simulator Section */
.simulator-container {
    margin-top: 2.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
}

.simulator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.simulator-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin: 0;
    color: var(--text-primary);
}

.simulator-header p {
    margin: 0.2rem 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.sim-btn {
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 8px;
    padding: 0.55rem 1.1rem;
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sim-btn:hover {
    background: var(--accent-gold);
    transform: scale(1.03);
}

.sim-month-slider-row {
    margin-bottom: 1rem;
}

.sim-month-slider-row label {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.sim-month-slider-row input[type="range"] {
    width: 100%;
    accent-color: var(--accent-gold);
}

.month-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.canvas-wrapper {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    justify-content: center;
}

canvas#solarCanvas {
    width: 100%;
    max-width: 900px;
    height: auto;
    display: block;
}

.sim-metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.85rem 1rem;
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.metric-val {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.2rem 0;
}

.metric-val.highlight { color: var(--accent-gold); }
.metric-val.success { color: var(--success); }

.metric-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Schedule Section */
.schedule-section {
    margin-top: 2.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
}

.section-heading {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

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

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    text-align: left;
}

.schedule-table th {
    background: var(--bg-card);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 2px solid var(--border);
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.05em;
}

.schedule-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
}

.schedule-table tr:hover td {
    background: var(--bg-hover);
}

.angle-tag {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-gold);
}

/* Content Depth Section */
.content-depth-section {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.guide-article h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.guide-article h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--accent-gold);
    margin: 1.75rem 0 0.75rem;
}

.guide-article p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.formula-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent-gold);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin: 1rem 0;
    font-family: var(--font-mono);
    color: var(--text-primary);
    overflow-x: auto;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin: 1.25rem 0;
}

.comp-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
}

.comp-card.highlight-card {
    border-color: var(--accent-gold);
    background: rgba(245, 158, 11, 0.08);
}

.comp-card h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
}

.comp-card p {
    font-size: 0.88rem;
    margin: 0.4rem 0;
}

@media (max-width: 600px) {
    .app-header h1 {
        font-size: 2rem;
    }
    .calculator-card {
        padding: 1.25rem;
    }
    .yield-bar-row {
        grid-template-columns: 90px 1fr 45px;
    }
}