:root {
    --primary-color: #2196F3;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

* {
    box-sizing: border-box;
}

body, html {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--light-color);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* PWA Specific Styles */
@media (display-mode: standalone) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    .container-fluid {
        padding-top: 20px;
    }
}

/* iOS PWA adjustments */
@supports (-webkit-touch-callout: none) {
    @media (display-mode: standalone) {
        body {
            padding-top: 44px; /* iOS status bar */
        }
    }
}

/* Scanner Card Styles */
.scanner-card {
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px dashed #dee2e6;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 200px;
    display: flex;
    align-items: center;
}

.scanner-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.15);
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
}

.scanner-card:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.2);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(3px);
}

.loading-overlay .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3em;
}

/* Tallas Section */
.talla-row {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
    padding: 8px;
    background-color: #f8f9fa;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.talla-row:hover {
    background-color: #e9ecef;
}

.talla-label {
    width: 70px;
    font-weight: 600;
    color: var(--dark-color);
    flex-shrink: 0;
}

.talla-input {
    width: 80px;
    text-align: center;
    margin: 0 10px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    font-weight: 500;
    font-size: 16px;
    transition: all 0.2s ease;
}

.talla-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(33, 150, 243, 0.25);
    outline: none;
}

.btn-talla {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    font-size: 14px;
    flex-shrink: 0;
}

.btn-talla:hover {
    transform: scale(1.1);
}

.btn-talla:active {
    transform: scale(0.95);
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid #ced4da;
    padding: 12px 16px;
    font-size: 16px; /* Prevent zoom on iOS */
    transition: all 0.2s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(33, 150, 243, 0.25);
    outline: none;
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 12px 24px;
    transition: all 0.2s ease;
    border: none;
    font-size: 16px; /* Prevent zoom on iOS */
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1976D2 100%);
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1976D2 0%, #1565C0 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #218838 100%);
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838 0%, #1e7e34 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #e0a800 100%);
    box-shadow: 0 2px 8px rgba(255, 193, 7, 0.3);
    color: #212529;
}

.btn-warning:hover {
    background: linear-gradient(135deg, #e0a800 0%, #d39e00 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.4);
}

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}

.card-header {
    border-radius: 12px 12px 0 0 !important;
    border-bottom: none;
    font-weight: 600;
}

/* Modal improvements */
.modal-content {
    border: none;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

.modal-header {
    border-radius: 16px 16px 0 0;
    border-bottom: 1px solid #e9ecef;
}

.modal-body {
    padding: 2rem;
}

/* QR Reader styling */
#qr-reader {
    border-radius: 12px;
    overflow: hidden;
}

#qr-reader video {
    border-radius: 8px;
}

/* Install prompt */
.install-prompt {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    z-index: 1050;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    border: none;
    backdrop-filter: blur(10px);
}

/* Touch targets for mobile */
@media (max-width: 768px) {
    .btn, .form-control, .form-select {
        min-height: 44px; /* iOS recommended touch target */
        font-size: 16px; /* Prevent zoom */
    }
    
    .scanner-card {
        margin: 15px 0;
        min-height: 180px;
    }
    
    .container-fluid {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .talla-row {
        margin-bottom: 8px;
        padding: 6px;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
}

/* Landscape mobile adjustments */
@media (max-width: 768px) and (orientation: landscape) {
    .scanner-card {
        min-height: 120px;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .scanner-card {
        border-width: 3px;
    }
    
    .btn {
        border: 2px solid transparent;
    }
    
    .btn-primary {
        border-color: var(--primary-color);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark mode support (if needed in future) */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here if needed */
}

/* Utilities */
.text-shadow {
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.glass-effect {
    backdrop-filter: blur(10px);
    background-color: rgba(255,255,255,0.9);
}

/* Animation keyframes */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

.pulse {
    animation: pulse 2s infinite;
}