/* Color Variables */
:root {
    /* Primary Colors */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-primary-light: #f8f9ff;
    --color-primary-lighter: #f0f2ff;
    --color-primary-lightest: #e8ebff;

    /* Success Colors */
    --color-success: #28a745;
    --color-success-bg: #d4edda;
    --color-success-text: #155724;

    /* Error Colors */
    --color-error: #dc3545;
    --color-error-bg: #f8d7da;
    --color-error-text: #721c24;

    /* Warning Colors */
    --color-warning: #856404;
    --color-warning-bg: #fff3cd;
    --color-warning-border: #ffeeba;
    --color-warning-hover: #ffe8a1;

    /* Gray Scale */
    --color-text-dark: #333;
    --color-text-gray: #666;
    --color-text-light: #999;
    --color-bg-default: #f8f9fa;
    --color-bg-hover: #e8e8e8;
    --color-border-light: #eee;
    --color-spinner-bg: #f3f3f3;

    /* White and Black */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-overlay: rgba(0, 0, 0, 0.9);
    --color-shadow-light: rgba(0, 0, 0, 0.3);
    --color-shadow-dark: rgba(0, 0, 0, 0.5);
    --color-frame-overlay: rgba(0, 0, 0, 0.25);

    /* Font and Spacing */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius-sm: 10px;
    --border-radius-md: 15px;
    --border-radius-lg: 20px;
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 20px;
}

/* Container */
.container {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--color-shadow-light);
    max-width: 600px;
    width: 100%;
    padding: 40px;
    animation: slideIn 0.6s ease-out;
    margin: 0 auto;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    color: var(--color-primary);
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    color: var(--color-text-gray);
    font-size: 1.1em;
}

.btn-home {
    display: inline-block;
    margin-top: 15px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-home:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

/* Upload Options Grid */
.upload-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 30px;
}

/* Upload Option Cards */
.upload-option {
    position: relative;
    border: 3px dashed var(--color-primary);
    border-radius: var(--border-radius-md);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--color-primary-light);
}

.upload-option:hover {
    border-color: var(--color-primary-dark);
    background: var(--color-primary-lighter);
    transform: scale(1.02);
}

.upload-option.drag-over {
    border-color: var(--color-primary-dark);
    background: var(--color-primary-lightest);
    transform: scale(1.05);
}

.upload-icon {
    font-size: 2.5em;
    margin-bottom: 10px;
    display: block;
}

.upload-option h3 {
    color: var(--color-primary);
    margin-bottom: 5px;
    font-size: 1.1em;
}

.upload-option p {
    color: var(--color-text-light);
    font-size: 0.85em;
}

/* File Input Hidden */
input[type="file"],
input[type="datetime-local"] {
    display: none;
}

/* Upload Area */
.upload-area {
    position: relative;
    border: 3px dashed var(--color-primary);
    border-radius: var(--border-radius-md);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--color-primary-light);
    margin-bottom: 30px;
}

.upload-area:hover {
    border-color: var(--color-primary-dark);
    background: var(--color-primary-lighter);
    transform: scale(1.02);
}

.upload-area.drag-over {
    border-color: var(--color-primary-dark);
    background: var(--color-primary-lightest);
    transform: scale(1.05);
}

.file-input {
    cursor: pointer;
}

/* Selected File Display */
.selected-file {
    display: none;
    background: var(--color-primary-lighter);
    padding: 15px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    border-left: 4px solid var(--color-primary);
}

.selected-file.show {
    display: block;
    animation: slideIn 0.3s ease-out;
}

.file-name {
    color: var(--color-primary);
    font-weight: 600;
    word-break: break-all;
}

.file-size {
    color: var(--color-text-light);
    font-size: 0.9em;
    margin-top: 5px;
}

/* Button Group */
.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

button {
    flex: 1;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Upload Button */
.btn-upload {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.btn-upload:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-upload:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Clear Button */
.btn-clear {
    background: var(--color-bg-default);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-clear:hover {
    background: var(--color-bg-hover);
}

/* Response Messages */
.response-message {
    display: none;
    padding: 20px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 20px;
    animation: slideIn 0.3s ease-out;
}

.response-message.show {
    display: block;
}

.response-message.success {
    background: var(--color-success-bg);
    border-left: 4px solid var(--color-success);
    color: var(--color-success-text);
}

.response-message.error {
    background: var(--color-error-bg);
    border-left: 4px solid var(--color-error);
    color: var(--color-error-text);
}

.response-message h4 {
    margin-bottom: 10px;
}

/* Metadata Display */
.metadata {
    background: var(--color-bg-default);
    border-radius: var(--border-radius-sm);
    padding: 15px;
    margin-top: 15px;
    font-size: 0.9em;
}

.metadata-item {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.metadata-item:last-child {
    border-bottom: none;
}

.metadata-label {
    color: var(--color-primary);
    font-weight: 600;
}

.metadata-value {
    color: var(--color-text-dark);
    word-break: break-all;
}

/* Camera Modal */
.camera-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.camera-container {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 500px;
    overflow: hidden;
    box-shadow: 0 20px 60px var(--color-shadow-dark);
}

/* Camera Header */
.camera-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.camera-header h2 {
    margin: 0;
    font-size: 1.5em;
}

.close-btn {
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 2em;
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    transform: scale(1.2);
}

/* Camera Preview */
.camera-preview {
    position: relative;
    width: 100%;
    height: 400px;
    background: var(--color-black);
}

#cameraFeed {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Camera Overlay Frame */
.camera-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.camera-frame {
    width: 80%;
    max-width: 420px;
    aspect-ratio: 2 / 1;
    border: 3px solid rgba(255, 255, 255, 0.85);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 0 0 9999px var(--color-frame-overlay);
}

/* Camera Buttons */
.camera-buttons {
    display: flex;
    gap: 10px;
    padding: 20px;
    background: var(--color-bg-default);
}

.btn-capture,
.btn-switch {
    flex: 1;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Capture Button */
.btn-capture {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.btn-capture:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Switch Camera Button */
.btn-switch {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 2px solid var(--color-warning-border);
}

.btn-switch:hover {
    background: var(--color-warning-hover);
}

/* Loading Spinner */
.loading {
    display: none;
    text-align: center;
    margin: 20px 0;
}

.spinner {
    border: 4px solid var(--color-spinner-bg);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

/* Recent Uploads */
.recent-uploads {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 2px solid var(--color-border-light);
}

.recent-uploads h3 {
    color: var(--color-primary);
    margin-bottom: 20px;
}

/* Upload Item */
.upload-item {
    background: var(--color-bg-default);
    border-radius: var(--border-radius-sm);
    padding: 15px;
    margin-bottom: 10px;
    border-left: 4px solid var(--color-primary);
}

.upload-item-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.upload-item-time {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.95em;
}

.upload-item-location {
    color: var(--color-text-light);
    font-size: 0.9em;
}

/* Footer Styles */
footer.footer {
    background: transparent;
    color: var(--color-white);
    padding: 20px;
    text-align: center;
    margin-top: auto;
    border-top: 2px solid var(--color-border-light);
}

.footer-link {
    color: var(--color-white);
    text-decoration: none;
    transition: opacity 0.3s ease;
    font-weight: 500;
}

.footer-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.footer-separator {
    color: var(--color-white);
    margin: 0 10px;
    opacity: 0.7;
}

/* Legal Content Styles */
.legal-content {
    background: var(--color-white);
    padding: 30px;
    border-radius: var(--border-radius-sm);
    line-height: 1.8;
}

.legal-content h2 {
    color: var(--color-primary);
    margin-bottom: 30px;
    font-size: 2em;
}

.legal-content h3 {
    color: var(--color-primary-dark);
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.legal-content p {
    color: var(--color-text-dark);
    margin-bottom: 15px;
    text-align: justify;
}

.legal-content ul {
    margin-left: 25px;
    margin-bottom: 15px;
}

.legal-content li {
    color: var(--color-text-dark);
    margin-bottom: 10px;
}

.legal-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-light);
    color: var(--color-text-light);
    font-size: 0.9em;
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    .header h1 {
        font-size: 2em;
    }

    .upload-area {
        padding: 25px;
    }

    .upload-options {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .legal-content {
        padding: 20px;
    }

    .legal-content h2 {
        font-size: 1.5em;
    }

    .legal-content h3 {
        font-size: 1.1em;
    }

    footer.footer {
        padding: 15px;
        font-size: 0.9em;
    }
}