:root {
    --primary: #FF6B35;
    --primary-dark: #E85A24;
    --secondary: #2EC4B6;
    --success: #2EC4B6;
    --warning: #FF9F1C;
    --danger: #E71D36;
    --dark: #011627;
    --light: #FDFFFC;
    --gray: #6c757d;
    --glass-bg: rgba(255, 255, 255, 0.98);
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    --border-radius: 20px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text x="50" y="50" font-size="40" text-anchor="middle" fill="rgba(255,255,255,0.03)">📦</text></svg>') repeat;
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.6s ease-out;
}

/* ============== HEADER ============== */
.header {
    text-align: center;
    margin-bottom: 2rem;
    animation: slideDown 0.5s ease-out;
}

.header h1 {
    color: white;
    font-size: 2rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.header p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
}

/* ============== CARDS ============== */
.scanner-card, .form-card {
    background: white;
    border-radius: 24px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.scanner-card:hover, .form-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.15);
}

/* ============== INPUT GROUP ============== */
.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

#skuInput {
    flex: 1;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 16px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: 'Inter', monospace;
}

#skuInput:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* ============== BOTONES ============== */
button {
    padding: 1rem;
    border: none;
    border-radius: 16px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

#scanBtn, #scanCameraBtn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-camera {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    width: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

#scanBtn:hover, #scanCameraBtn:hover, .btn-camera:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

#saveBtn {
    background: linear-gradient(135deg, var(--success), #219B8A);
    color: white;
    flex: 1;
}

#cancelBtn {
    background: var(--gray);
    color: white;
    flex: 1;
}

#saveBtn:hover, #cancelBtn:hover {
    transform: scale(1.02);
}

/* ============== DIMENSIONES ============== */
.dimensions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
}

.dimensions input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}

.dimensions input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ============== EMPAQUE ============== */
.packaging {
    display: flex;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.packBtn {
    flex: 1;
    background: #f0f0f0;
    color: #333;
    border: 2px solid #e0e0e0;
    border-radius: 16px;
    padding: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.packBtn.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-color: transparent;
    transform: scale(1.02);
}

/* ============== INFORMACIÓN DEL PRODUCTO ============== */
.product-info {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.product-info label {
    font-weight: 600;
    color: var(--dark);
    min-width: 60px;
}

.sku-highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 12px;
    font-family: monospace;
    font-weight: 600;
    font-size: 1rem;
}

.articulo-highlight {
    background: #f0f0f0;
    color: var(--dark);
    padding: 0.5rem 1rem;
    border-radius: 12px;
    font-weight: 500;
    flex: 1;
    word-break: break-word;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* ============== CÁMARA Y ESCÁNER ============== */
.camera-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.camera-card {
    background: white;
    border-radius: 24px;
    padding: 1.5rem;
    width: 90%;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.camera-controls {
    margin-top: 1rem;
}

.camera-controls button {
    background: var(--danger);
    color: white;
    width: 100%;
}

.camera-hint {
    margin-top: 0.75rem;
    color: #FF6B35;
    font-weight: bold;
    font-size: 0.9rem;
}

/* ============== MODAL ============== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 24px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.modal-content h3 {
    color: var(--danger);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

#alertDetails {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 12px;
    margin: 1rem 0;
    text-align: left;
}

#alertDetails p {
    margin: 0.5rem 0;
}

/* ============== STATUS MESSAGE ============== */
.status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 12px;
    font-size: 0.9rem;
    text-align: center;
    animation: fadeInUp 0.3s ease;
}

.status.error {
    background: #fee;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.status.success {
    background: #e8f5e9;
    color: var(--success);
    border-left: 4px solid var(--success);
}

/* ============== ANIMACIONES ============== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============== RESPONSIVE ============== */
@media (max-width: 640px) {
    body {
        padding: 10px;
    }
    
    .scanner-card, .form-card {
        padding: 1.5rem;
    }
    
    .dimensions {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .packaging {
        flex-direction: column;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .btn-camera {
        width: 100%;
    }
    
    .camera-card {
        padding: 1rem;
        width: 95%;
    }
    
    .modal-content {
        padding: 1.5rem;
        width: 95%;
    }
    
    .product-info {
        flex-direction: column;
        text-align: center;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

/* ============== HTML5-QRCODE ============== */
#reader {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
}

#reader video {
    width: 100%;
    border-radius: 16px;
}

#reader__scan_region {
    min-height: 300px;
}

/* ============== GUÍA VISUAL OPCIONAL ============== */
/* Puedes descomentar esto si quieres un recuadro de guía */
/*
#reader::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 30%;
    border: 2px dashed #FF6B35;
    border-radius: 12px;
    pointer-events: none;
    z-index: 10;
}

/* Viewport para Quagga */
.viewport {
    position: relative;
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
}

.viewport video {
    width: 100%;
    border-radius: 16px;
    background: #000;
}

.viewport canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
/* Video del escáner */
#scanner-video {
    width: 100%;
    border-radius: 16px;
    background: #000;
    transform: scaleX(1);
}