/* Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #7c3aed;
    --secondary-dark: #6d28d9;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --neutral-color: #6b7280;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

.back-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    margin-bottom: 1rem;
    font-weight: 500;
}

.back-link:hover {
    text-decoration: underline;
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.features li {
    padding: 0.25rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

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

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

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
}

.btn-large {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Info Section */
.info-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.info-section h3 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.protection-layers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.layer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 8px;
}

.layer-num {
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.layer-name {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Forms */
.upload-form {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* File Upload */
.file-upload {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    transition: border-color 0.2s, background-color 0.2s;
    cursor: pointer;
}

.file-upload:hover,
.file-upload.dragover {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

.file-upload input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload-content {
    color: var(--text-light);
}

.file-upload-content svg {
    margin-bottom: 1rem;
    color: var(--neutral-color);
}

.file-upload-content .highlight {
    color: var(--primary-color);
    font-weight: 500;
}

.file-name {
    margin-top: 1rem;
    font-weight: 600;
    color: var(--text-color);
}

/* Checkbox Group */
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    background: var(--bg-color);
    border-radius: 6px;
    cursor: pointer;
}

.checkbox-item input {
    width: 18px;
    height: 18px;
}

/* Alerts */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-error {
    background-color: #fef2f2;
    color: var(--error-color);
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #f0fdf4;
    color: var(--success-color);
    border: 1px solid #bbf7d0;
}

/* Results Section */
.results-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.results-section h2 {
    margin-bottom: 1.5rem;
}

.result-summary {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
}

.result-summary.success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.result-summary.warning {
    background-color: #fffbeb;
    border: 1px solid #fde68a;
}

.result-icon {
    flex-shrink: 0;
}

.result-summary.success .result-icon {
    color: var(--success-color);
}

.result-summary.warning .result-icon {
    color: var(--warning-color);
}

.result-content h3 {
    margin-bottom: 0.25rem;
}

.result-content p {
    color: var(--text-light);
}

/* Best Match */
.best-match {
    background: var(--bg-color);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.best-match h3 {
    margin-bottom: 1rem;
}

.data-grid {
    display: grid;
    gap: 1rem;
}

.data-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.data-label {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

.data-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
}

.data-value.uuid {
    font-family: monospace;
    font-size: 0.9rem;
    word-break: break-all;
}

/* Details Table */
.details-section h3 {
    margin-bottom: 1rem;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
}

.results-table th,
.results-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.results-table th {
    background: var(--bg-color);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-light);
}

.results-table tr.found {
    background-color: #f0fdf4;
}

.data-cell code {
    background: var(--bg-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-neutral {
    background-color: #f3f4f6;
    color: #6b7280;
}

/* Confidence */
.confidence {
    font-size: 0.875rem;
    font-weight: 500;
}

.confidence-high {
    color: var(--success-color);
}

.confidence-medium {
    color: var(--warning-color);
}

.confidence-low {
    color: var(--neutral-color);
}

.confidence-none {
    color: var(--text-light);
}

/* Info Box */
.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 10px;
    padding: 1.5rem;
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.info-box ul {
    margin-left: 1.25rem;
}

.info-box li {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* User Detected Display */
.user-detected {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin-top: 1.5rem;
}

.user-name {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Responsive */
@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .protection-layers {
        grid-template-columns: repeat(2, 1fr);
    }

    .results-table {
        font-size: 0.875rem;
    }

    .results-table th,
    .results-table td {
        padding: 0.5rem;
    }

    .user-name {
        font-size: 1.5rem;
    }

    .user-detected {
        padding: 1.5rem;
    }
}