/* 
   Modern Tech & Glassmorphism Styling - Buku Tamu Stand Panglima
   IT Exhibition Theme - Compact & Perfectly Fitted Layout
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.75);
    --primary: #06b6d4;
    --primary-glow: rgba(6, 182, 212, 0.4);
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.4);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.1);
    --input-bg: rgba(15, 23, 42, 0.6);
    --gold: #f59e0b;
    --gold-glow: rgba(245, 158, 11, 0.5);
    --radius-lg: 18px;
    --radius-md: 10px;
}

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

body {
    background: radial-gradient(circle at 15% 15%, #1e1b4b 0%, #0f172a 50%, #020617 100%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px 12px;
    position: relative;
    overflow-x: hidden;
}

/* Dynamic background glow shapes */
body::before, body::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    pointer-events: none;
}

body::before {
    background: var(--primary);
    top: -50px;
    left: -50px;
    opacity: 0.3;
}

body::after {
    background: var(--accent);
    bottom: -50px;
    right: -50px;
    opacity: 0.3;
}

.container {
    width: 100%;
    max-width: 440px;
    position: relative;
    z-index: 1;
    margin: auto;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.brand-header {
    text-align: center;
    margin-bottom: 16px;
}

.brand-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(6, 182, 212, 0.12);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.brand-title {
    font-family: 'Outfit', sans-serif;
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.brand-subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

/* Form Controls */
.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #cbd5e1;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-label i {
    color: var(--primary);
    margin-right: 6px;
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 14px;
    outline: none;
    transition: all 0.25s ease;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px var(--primary-glow);
    background: rgba(15, 23, 42, 0.8);
}

.form-control::placeholder {
    color: #64748b;
}

/* Modern Button */
.btn-submit {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 8px 20px var(--primary-glow);
    transition: all 0.3s ease;
    margin-top: 16px;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 25px var(--primary-glow);
}

.btn-submit:active {
    transform: translateY(0);
}

/* Alert Messages */
.alert {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.footer-note {
    text-align: center;
    margin-top: 14px;
    font-size: 11px;
    color: #64748b;
}

.footer-note a {
    color: var(--primary);
    text-decoration: none;
}