:root {
    /* Slate Palette */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-750: #2d3b4e;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;

    /* Accents */
    --accent-primary: #38bdf8;
    /* Sky 400 */
    --accent-hover: #0ea5e9;
    /* Sky 500 */
    --danger: #ef4444;
    /* Red 500 */

    /* Typography */
    --font-main: 'Inter', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    background-color: var(--slate-950);
    color: var(--slate-100);
    font-family: var(--font-main);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: grid;
    grid-template-columns: 300px 1fr 300px;
    height: 100%;
    width: 100%;
}

/* Common Panel Styles */
.panel {
    background-color: var(--slate-900);
    border-right: 1px solid var(--slate-800);
    border-left: 1px solid var(--slate-800);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
}

.left-panel {
    border-left: none;
}

.right-panel {
    border-right: none;
    border-left: 1px solid var(--slate-800);
}

.panel-header h2 {
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--slate-500);
    font-weight: 600;
}

h3 {
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--slate-400);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--slate-800);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--slate-500);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--slate-300);
}

.tab-btn.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.tab-content {
    display: none;
    height: 100%;
    flex-direction: column;
}

.tab-content.active {
    display: flex;
}

/* Stats */
.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--slate-800);
}

.stat-item .label {
    font-size: 0.9rem;
    color: var(--slate-300);
}

.stat-item .value {
    font-family: monospace;
    color: var(--accent-primary);
    font-weight: 600;
}

.upgrade-btn {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    color: var(--accent-primary);
    min-width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 700;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.upgrade-btn:hover {
    background: var(--slate-700);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

.upgrade-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    border-color: transparent;
    box-shadow: none;
    background: var(--slate-800);
}

.upgrade-btn.max {
    background: var(--slate-800);
    color: var(--slate-400);
    font-size: 0.65rem;
    padding: 0 0.75rem;
    border-left: none;
    /* Merge look */
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.upgrade-btn.max:hover {
    color: var(--accent-primary);
    background: var(--slate-750);
}

/* Group styling tweak */
.btn-group {
    display: flex;
    gap: 0;
    /* Remove gap for merged look */
    align-items: center;
}

.btn-group .upgrade-btn:first-child {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    width: 40px;
    /* Slightly wider + button */
}

.stat-points {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--slate-400);
    text-align: right;
}

/* Main View (Climb) */
.main-view {
    position: relative;
    background-color: var(--slate-950);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 2rem;
}

.climb-display {
    flex-grow: 1;
    width: 100%;
    position: relative;
    border: 1px solid var(--slate-800);
    border-radius: 8px;
    background: linear-gradient(180deg, var(--slate-900) 0%, var(--slate-950) 100%);
    overflow: hidden;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
}

canvas#route-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.climber-marker {
    display: none;
    /* Handled by canvas now */
}

.difficulty-indicator {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.75rem;
    background: rgba(15, 23, 42, 0.8);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--slate-800);
    color: var(--slate-400);
}

.controls {
    width: 100%;
    max-width: 400px;
    display: flex;
    justify-content: center;
}

.primary-action {
    background-color: var(--slate-100);
    color: var(--slate-900);
    border: none;
    padding: 1rem 3rem;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    border-radius: 6px;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.1);
}

.primary-action:active {
    transform: scale(0.96);
}

.primary-action:hover {
    background-color: white;
}

/* Right Panel Elements */
.metrics-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-large {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.metric-large .value {
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--slate-50);
}

.metric-large .unit {
    font-size: 1.25rem;
    color: var(--slate-500);
    font-weight: 500;
}

.subtitle-metric {
    font-size: 0.8rem;
    color: var(--slate-500);
    margin-top: -1rem;
    margin-left: 0.25rem;
    margin-bottom: 1rem;
}

.metric-sub {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--slate-800);
    padding-top: 1rem;
}

.metric-sub .label {
    font-size: 0.8rem;
    color: var(--slate-500);
}

.metric-sub .value {
    font-size: 1.2rem;
    color: var(--accent-primary);
}

/* Scroll Areas */
.scrollja {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.scrollja::-webkit-scrollbar {
    width: 4px;
}

.scrollja::-webkit-scrollbar-track {
    background: var(--slate-900);
}

.scrollja::-webkit-scrollbar-thumb {
    background: var(--slate-700);
    border-radius: 2px;
}

.empty-state {
    font-size: 0.8rem;
    color: var(--slate-600);
    font-style: italic;
    text-align: center;
    padding: 2rem 0;
}

/* Sponsors */
.sponsor-card {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    animation: slideIn 0.3s ease-out;
}

.sponsor-name {
    font-size: 0.9rem;
    color: var(--slate-200);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.sponsor-income {
    font-size: 0.8rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.sponsor-desc {
    font-size: 0.75rem;
    color: var(--slate-500);
    font-style: italic;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

/* Gear */
.gear-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--slate-800);
}

.gear-info {
    flex-grow: 1;
}

.gear-name {
    font-size: 0.85rem;
    color: var(--slate-200);
    font-weight: 500;
}

.gear-desc {
    font-size: 0.75rem;
    color: var(--slate-500);
}

.buy-btn {
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    color: var(--slate-400);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: not-allowed;
    transition: all 0.2s;
}

.buy-btn.can-afford {
    background: var(--accent-primary);
    color: var(--slate-950);
    border-color: var(--accent-primary);
    cursor: pointer;
    font-weight: 600;
}

.buy-btn.can-afford:hover {
    background: var(--accent-hover);
}

/* Training Items */
.training-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--slate-800);
}

.training-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.training-name {
    font-size: 0.85rem;
    color: var(--slate-200);
    font-weight: 500;
}

.training-level {
    font-size: 0.75rem;
    color: var(--accent-primary);
    font-family: monospace;
}

.training-desc {
    font-size: 0.75rem;
    color: var(--slate-500);
    margin-bottom: 0.5rem;
    font-style: italic;
}

.training-actions {
    display: flex;
    justify-content: flex-end;
}

/* Settings */
.settings-section {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--slate-800);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.danger-btn {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    opacity: 0.7;
}

.danger-btn:hover {
    background: var(--danger);
    color: white;
    opacity: 1;
}

.save-status {
    font-size: 0.7rem;
    color: var(--slate-600);
    min-height: 1em;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 6, 23, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--slate-900);
    border: 1px solid var(--accent-primary);
    padding: 3rem;
    border-radius: 8px;
    text-align: center;
    max-width: 500px;
    box-shadow: 0 0 50px rgba(56, 189, 248, 0.2);
}

.modal-content h1 {
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-size: 2rem;
}

.modal-content p {
    color: var(--slate-300);
    margin-bottom: 2rem;
    line-height: 1.5;
}