:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --accent: #10b981;
    --danger: #ef4444;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Footer & Bando specific styles */
.img-fluid {
    max-width: 100%;
    height: auto;
}

#bando .btn-info {
    background-color: #17a2b8;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

#bando .btn-info:hover {
    background-color: #138496;
}

#bando .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 15px 25px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-controls.hidden {
    display: none;
}

#username-display {
    font-weight: 600;
    color: var(--text-main);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.category-badge {
    background: #e0e7ff;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    user-select: none;
    display: flex;
    align-items: center;
    gap: 5px;
}

.category-badge:hover {
    background: #dbeafe;
}

.category-badge.hidden {
    display: none;
}

.category-menu {
    position: absolute;
    top: 120%;
    left: 0;
    background: white;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    padding: 8px;
    z-index: 1000;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border: 1px solid #e2e8f0;
}

.category-menu.hidden {
    display: none;
}

.category-menu-item {
    padding: 10px 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
    color: var(--text-main);
    text-align: left;
}

.category-menu-item:hover {
    background: var(--bg-color);
    color: var(--primary);
}

/* Screens */
.screen {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.screen.active {
    display: block;
}

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

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

h2 {
    margin-bottom: 20px;
    color: var(--text-main);
}

.back-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    margin-bottom: 15px;
    display: inline-flex;
    align-items: center;
    transition: color 0.2s;
}

.back-btn:hover {
    color: var(--primary);
}

/* Grid for Categories */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.category-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border: 2px solid transparent;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    border-color: var(--primary);
}

.category-card h3 {
    margin-top: 10px;
    font-size: 1.1rem;
}

/* Grid for Admin Dashboard */
#screen-admin .grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

#screen-admin .card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid #f1f5f9;
    display: flex;
    flex-direction: column;
}

#screen-admin .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

#screen-admin h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f1f5f9;
}

/* User List Styling */
#users-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 400px;
    overflow-y: auto;
}

#users-list li {
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid transparent;
    transition: all 0.2s;
}

#users-list li:hover {
    background: white;
    border-color: var(--primary);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

/* Form Styling within Cards */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s;
    background: #f8fafc;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* QR Code Container */
#qr-container {
    background: #f8fafc;
    padding: 20px;
    border-radius: 16px;
    border: 2px dashed #e2e8f0;
}

#qr-image {
    mix-blend-mode: multiply;
}

#otp-secret {
    background: #1e293b;
    color: #10b981;
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 15px;
    display: inline-block;
}

/* Mode Selection */
.mode-options {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 50px;
    flex-wrap: wrap;
}

.mode-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    width: 300px;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
}

.mode-card:hover {
    transform: scale(1.05);
    background: linear-gradient(to bottom right, #ffffff, #f0f9ff);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.mode-card .icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

/* Camera Mode */
.split-view {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    height: 60vh;
}

.video-container {
    background: black;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

#video-feed {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#camera-status {
    position: absolute;
    top: 15px;
    left: 15px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 0.8rem;
}

#snap-btn {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.4);
    transition: all 0.2s;
}

#snap-btn:hover {
    background: var(--primary-hover);
    transform: translateX(-50%) scale(1.05);
}

.info-panel {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-card {
    text-align: center;
}

.product-card .icon {
    font-size: 5rem;
    margin-bottom: 10px;
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.product-card.empty {
    color: var(--text-muted);
}

/* Close Button for Upload Preview */
#close-preview-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.8);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 24px;
    line-height: 1;
    cursor: pointer;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

#close-preview-btn:hover {
    background: white;
    transform: scale(1.1);
}

/* Upload Mode */
.upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
    width: 100%;
}

.upload-area {
    border: 3px dashed var(--text-muted);
    border-radius: 20px;
    padding: 50px;
    text-align: center;
    width: 100%;
    max-width: 600px;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.05);
}

.upload-area.highlight {
    border-color: var(--primary);
    background: rgba(79, 70, 229, 0.05);
}

.upload-area input {
    display: none;
}

.upload-area label {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 10px;
    transition: background 0.2s;
}

.upload-area label:hover {
    background: var(--primary-hover);
}

#upload-preview-container {
    display: flex;
    width: 100%;
}

#upload-preview {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* Forms & Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn.primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
}

.btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn.secondary {
    background: white;
    color: var(--text-main);
    border: 1px solid #e2e8f0;
}

.btn.secondary:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
}

.btn.large {
    padding: 20px 40px;
    font-size: 1.2rem;
    width: 100%;
}

.btn.small {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Login & Cards */
.login-card {
    max-width: 400px;
    margin: 100px auto;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* List Group */
.list-group {
    list-style: none;
    margin-bottom: 15px;
}

.list-group li {
    padding: 10px;
    border-bottom: 1px solid #e2e8f0;
}

.list-group li:last-child {
    border-bottom: none;
}

/* Responsive */
@media (max-width: 768px) {
    .split-view {
        grid-template-columns: 1fr;
        height: auto;
    }

    .video-container {
        height: 400px;
    }

    .mode-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .btn.large {
        width: 100%;
    }

    .login-card {
        margin: 40px auto;
    }
}