:root {
    --geo-primary: #3b82f6;
    --geo-secondary: #8b5cf6;
    --geo-success: #10b981;
    --geo-warning: #f59e0b;
    --geo-dark: var(--gray-900);
    --geo-light: var(--gray-100);
}

.geo-page {
    min-height: calc(100vh - 200px);
    padding: 1.5rem 0;
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--gray-50) 100%);
}

.geo-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.geo-header {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
}

/* .tbi-fs-btn = bouton plein ecran TBI harmonisé (cf projection-mode.css).
   .geo-header doit etre position: relative pour le position: absolute du bouton. */

/* Mode :fullscreen sur .geo-page : tools + canvas restent accessibles */
.geo-page:fullscreen {
    background: #fff;
    padding: 1rem;
    width: 100vw;
    height: 100vh;
    max-width: none;
    overflow-y: auto;
}

.geo-title {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--geo-primary), var(--geo-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.geo-subtitle {
    color: var(--gray-500);
    font-size: 1rem;
}

/* Main Layout */
.geo-main {
    display: grid;
    grid-template-columns: 280px 1fr 300px;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 1200px) {
    .geo-main {
        grid-template-columns: 1fr;
    }
}

/* Tools Panel */
.geo-tools {
    background: var(--white);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.geo-tools h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--geo-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.tool-btn {
    padding: 0.875rem 0.75rem;
    border: 2px solid var(--geo-light);
    border-radius: 12px;
    background: var(--white);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-500);
}

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

.tool-btn.active {
    border-color: var(--geo-primary);
    background: rgba(59, 130, 246, 0.1);
    color: var(--geo-primary);
}

.tool-btn i {
    font-size: 1.5rem;
}

/* Canvas Area */
.geo-canvas-area {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    overflow: hidden;
}

.canvas-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--geo-light);
    border-bottom: 1px solid var(--gray-200);
}

.canvas-toolbar-left {
    display: flex;
    gap: 0.5rem;
}

.canvas-toolbar-btn {
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 8px;
    background: var(--white);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.2s;
}

.canvas-toolbar-btn:hover {
    background: var(--geo-primary);
    color: white;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    height: 500px;
    background: var(--white);
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
    background-size: 20px 20px;
    cursor: crosshair;
}

#geoCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Instructions Panel */
.geo-instructions {
    background: var(--white);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.geo-instructions h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--geo-dark);
    margin-bottom: 1rem;
}

.construction-select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--geo-light);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    cursor: pointer;
}

.construction-select:focus {
    outline: 2px solid transparent;
    border-color: var(--geo-primary);
}

/* Steps */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.step-item {
    padding: 0.875rem;
    border-radius: 10px;
    border: 2px solid var(--geo-light);
    transition: all 0.2s;
}

.step-item.current {
    border-color: var(--geo-primary);
    background: rgba(59, 130, 246, 0.05);
}

.step-item.completed {
    border-color: var(--geo-success);
    background: rgba(16, 185, 129, 0.05);
}

.step-item.locked {
    opacity: 0.5;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.step-number {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--geo-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-item.completed .step-number {
    background: var(--geo-success);
}

.step-tool {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.5rem;
    background: var(--geo-light);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--gray-500);
}

.step-instruction {
    font-size: 0.85rem;
    color: var(--geo-dark);
    line-height: 1.5;
}

/* Progress */
.progress-bar {
    height: 6px;
    background: var(--geo-light);
    border-radius: 3px;
    margin-top: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--geo-primary), var(--geo-secondary));
    border-radius: 3px;
    transition: width 0.3s;
}

/* Buttons */
.geo-btn {
    width: 100%;
    padding: 0.875rem;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.2s;
    margin-top: 1rem;
}

.geo-btn-primary {
    background: linear-gradient(135deg, var(--geo-primary), var(--geo-secondary));
    color: white;
}

.geo-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

.geo-btn-success {
    background: var(--geo-success);
    color: white;
}

/* Color picker */
.color-options {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.color-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.color-btn:hover,
.color-btn.active {
    transform: scale(1.1);
    border-color: var(--geo-dark);
}

/* Thickness */
.thickness-options {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.thickness-btn {
    flex: 1;
    padding: 0.5rem;
    border: 2px solid var(--geo-light);
    border-radius: 8px;
    background: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.thickness-btn.active {
    border-color: var(--geo-primary);
    background: rgba(59, 130, 246, 0.1);
}

.thickness-line {
    width: 30px;
    background: var(--geo-dark);
    border-radius: 2px;
}

/* Grid Size Control */
.grid-size-control {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.grid-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--geo-light);
    border-radius: 3px;
    outline: 2px solid transparent;
}

.grid-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--geo-primary);
    border-radius: 50%;
    cursor: pointer;
}

.grid-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--geo-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.grid-size-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--geo-dark);
    min-width: 45px;
}

/* Angle Display */
.angle-display {
    position: absolute;
    background: rgba(59, 130, 246, 0.9);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    pointer-events: none;
    z-index: 100;
}

/* Virtual Tools Overlay */
.virtual-tool {
    position: absolute;
    pointer-events: none;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.virtual-tool.active {
    opacity: 1;
    pointer-events: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .geo-tools,
    .geo-instructions {
        order: 2;
    }
    .geo-canvas-area {
        order: 1;
    }
    .canvas-wrapper {
        height: 350px;
    }
}

/* TBI / Touch-friendly styles */
@media (pointer: coarse) {
    .tool-btn {
        padding: 1.1rem 1rem;
        min-height: 60px;
    }
    .color-btn {
        width: 40px;
        height: 40px;
    }
    .thickness-btn {
        min-height: 50px;
        padding: 0.75rem;
    }
    .canvas-toolbar-btn {
        padding: 0.75rem 1rem;
        min-height: 44px;
    }
    .canvas-wrapper {
        touch-action: none; /* Prevent browser gestures */
    }
}

/* Prevent text selection on touch */
.geo-tools,
.canvas-toolbar {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* ===== DARK MODE ===== */
[data-theme='dark'] .geo-page {
    background: linear-gradient(135deg, #0f172a 0%, #1a1f35 100%) !important;
}
[data-theme='dark'] .geo-tools,
[data-theme='dark'] .geo-instructions {
    background: #1e293b !important;
    border-color: #334155 !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3) !important;
}
[data-theme='dark'] .geo-tools h3,
[data-theme='dark'] .geo-instructions h3 {
    color: #e2e8f0 !important;
    border-bottom-color: #334155 !important;
}
[data-theme='dark'] .geo-canvas-area {
    background: #162032 !important;
}
[data-theme='dark'] .geo-tool-btn {
    background: #243044 !important;
    border-color: #334155 !important;
    color: #cbd5e1 !important;
}
[data-theme='dark'] .geo-tool-btn:hover {
    background: #2d3d55 !important;
    border-color: #475569 !important;
}
[data-theme='dark'] .geo-tool-btn.active {
    background: rgba(99, 102, 241, 0.25) !important;
    border-color: #6366f1 !important;
    color: #a5b4fc !important;
}
[data-theme='dark'] .geo-label,
[data-theme='dark'] .geo-instructions li {
    color: #94a3b8 !important;
}
[data-theme='dark'] .geo-input {
    background: #243044 !important;
    border-color: #334155 !important;
    color: #e2e8f0 !important;
}
[data-theme='dark'] .geo-header {
    color: #f1f5f9 !important;
}
[data-theme='dark'] .geo-subtitle {
    color: #94a3b8 !important;
}