/* UI/UX Pro Max - Premium Design System */

:root {
    /* Brand Colors */
    --primary: #10b981;
    /* Emerald 500 */
    --primary-dark: #059669;
    /* Emerald 600 */
    --accent: #3b82f6;
    /* Blue 500 */

    /* Neutral Colors */
    --text-main: #111827;
    /* Gray 900 */
    --text-muted: #6b7280;
    /* Gray 500 */
    --bg-page: #f9fafb;
    /* Gray 50 */

    /* Glassmorphism Variables */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);

    /* Spacing & Radius */
    --radius-lg: 24px;
    --radius-md: 12px;
}

/* Reset & Base */
*,
*::before,
*::after {
    box_sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    background-color: #f3f4f6;
    background-image:
        radial-gradient(at 0% 0%, rgba(16, 185, 129, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(59, 130, 246, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(236, 72, 153, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    width: 100%;
    max-width: 440px;
    text-align: center;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}

/* Typography */
h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

/* QR Container */
.qr-wrapper {
    margin: 32px auto;
    background: white;
    padding: 16px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.02);
    width: fit-content;
}

.qr-img {
    width: 260px;
    height: 260px;
    object-fit: contain;
    border-radius: 8px;
    display: block;
}

/* Interactive Elements */
.action-area {
    margin-top: 1.5rem;
}

.icon-box {
    width: 48px;
    height: 48px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.icon-box svg {
    width: 24px;
    height: 24px;
}

.instruction-text {
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
}

.expiry-text {
    font-size: 0.8rem;
    color: #ef4444;
    /* Red 500 */
    background: rgba(254, 226, 226, 0.5);
    padding: 4px 12px;
    border-radius: 999px;
    display: inline-block;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.25rem;
    text-align: left;
}

.input-field {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.8);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

/* Upload Area */
.upload-zone {
    border: 2px dashed #d1d5db;
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.upload-zone:hover {
    border-color: var(--primary);
    background: rgba(16, 185, 129, 0.05);
}

.upload-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    text-align: left;
}

.alert-error {
    background: #fee2e2;
    color: #b91c1c;
}

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

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-brand {
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

/* Footer */
.footer {
    padding: 24px;
    text-align: center;
    color: #9ca3af;
    font-size: 0.85rem;
}