/* css/style.css */
:root {
    --primary-color: #0d9488; /* Teal 600 */
    --primary-hover: #0f766e; /* Teal 700 */
    --secondary-color: #14b8a6; /* Teal 500 */
    --bg-gradient-1: #e0f2fe; /* Light Blue */
    --bg-gradient-2: #fdf4ff; /* Light Pink */
    --bg-gradient-3: #ccfbf1; /* Light Teal */
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.07);
    --text-main: #1e293b; /* Slate 800 - High Contrast */
    --text-muted: #475569; /* Slate 600 */
    --danger-color: #ef4444; /* Red 500 */
    --warning-color: #f59e0b; /* Amber 500 */
    --success-color: #10b981; /* Emerald 500 */
    --border-radius: 20px; /* Soft rounded corners */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Prompt', sans-serif;
}

body {
    background: linear-gradient(135deg, var(--bg-gradient-1), var(--bg-gradient-2), var(--bg-gradient-3));
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: var(--text-main);
    font-size: 18px; /* Large readable font for elderly */
    line-height: 1.6;
    min-height: 100vh;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Navbar */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--glass-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 26px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
}

.nav-item {
    text-decoration: none;
    color: var(--text-main);
    font-size: 18px;
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-item:hover {
    color: var(--primary-color);
}

.nav-item.locked {
    color: var(--text-muted);
}

.nav-item.locked::after {
    content: '🔒';
    font-size: 14px;
}

/* Auth Buttons */
.btn {
    padding: 14px 24px;
    border-radius: var(--border-radius);
    border: none;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: all 0.3s ease;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.btn:active {
    transform: translateY(2px);
}

@media (min-width: 768px) {
    .btn {
        width: auto;
    }
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 6px 12px rgba(13, 148, 136, 0.2);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: rgba(255, 255, 255, 0.5);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background-color: #dc2626;
    transform: translateY(-2px);
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Cards (Glassmorphism) */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    padding: 30px;
    box-shadow: var(--glass-shadow);
    margin-bottom: 25px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    box-shadow: 0 12px 40px rgba(31, 38, 135, 0.1);
}

/* Disclaimer */
.disclaimer {
    background: rgba(254, 243, 199, 0.8);
    backdrop-filter: blur(8px);
    color: #92400e;
    border-left: 6px solid #f59e0b;
    border-radius: var(--border-radius);
    padding: 15px 20px;
    margin-bottom: 25px;
    font-size: 18px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 35px;
    padding: 20px 0;
}

.hero h1 {
    color: var(--primary-color);
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(255,255,255,0.8);
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
}

/* Upload & Camera Section */
.upload-area {
    border: 3px dashed rgba(20, 184, 166, 0.5);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.upload-area:hover, .upload-area.dragover {
    background: rgba(255, 255, 255, 0.7);
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 54px;
    margin-bottom: 15px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

@media (min-width: 768px) {
    .action-buttons {
        flex-direction: row;
        justify-content: center;
    }
}

/* Preview */
#preview-container {
    width: 100%;
    max-width: 500px;
    margin: 25px auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border: 4px solid white;
}

#preview-image, #webcam-video {
    width: 100%;
    height: auto;
    display: block;
}

/* Results */
.result-card {
    text-align: center;
    margin-top: 25px;
    padding: 30px;
    border-radius: var(--border-radius);
    font-size: 20px;
    font-weight: 600;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.result-title {
    font-size: 28px;
    margin-bottom: 12px;
}

.result-desc {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.6;
}

.level-0 { background: rgba(220, 252, 231, 0.85); color: #065f46; border: 2px solid var(--success-color); }
.level-1 { background: rgba(224, 242, 254, 0.85); color: #075985; border: 2px solid #0ea5e9; } 
.level-2 { background: rgba(254, 243, 199, 0.85); color: #92400e; border: 2px solid var(--warning-color); }
.level-3 { background: rgba(254, 226, 226, 0.85); color: #991b1b; border: 2px solid var(--danger-color); }

/* Forms */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 16px;
    background: rgba(255, 255, 255, 0.6);
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 12px;
    font-size: 18px;
    color: var(--text-main);
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    background: #ffffff;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.15);
}

.form-actions {
    margin-top: 35px;
    text-align: center;
}

/* Content Pages */
.content-section {
    margin-bottom: 45px;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    padding: 30px;
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
    font-size: 28px;
    border-bottom: 2px solid rgba(13, 148, 136, 0.2);
    padding-bottom: 12px;
}

.content-list {
    list-style-type: none;
    padding-left: 0;
}

.content-list li {
    position: relative;
    padding-left: 35px;
    margin-bottom: 20px;
    font-size: 18px;
}

.content-list li::before {
    content: '✅';
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 20px;
}

.red-flags {
    background: rgba(254, 226, 226, 0.6);
    border: 2px solid rgba(239, 68, 68, 0.4);
}

.red-flags h3 {
    color: var(--danger-color);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(239, 68, 68, 0.2);
    padding-bottom: 12px;
}

.red-flags .content-list li::before {
    content: '⚠️';
}

/* Hide elements */
.d-none { display: none !important; }