/* ============================================
   AUTH PAGES — Premium UI
   Dark Glassmorphism Design
   ============================================ */

:root {
    --primary-purple: #541fc0;
    --light-purple: #e9d8fd;
    --bg-white: #ffffff;
    --bg-light: #f9f5ff;
    --navy-deep: #2d3748;
    --accent-purple: #541fc0;
    --accent-glow: rgba(159, 122, 234, 0.2);
    --bg-glass: rgba(255, 255, 255, 0.85);
    --bg-glass-hover: rgba(255, 255, 255, 0.98);
    --border-glass: rgba(159, 122, 234, 0.15);
    --text-pure: #2d3748;
    --text-main: #4a5568;
    --text-dim: #718096;
    --text-muted: #a0aec0;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-soft: 0 10px 30px rgba(84, 31, 192, 0.08);
}

body {
    margin: 0;
    padding: 0;
    font-family: 'DM Sans', sans-serif;
    background: radial-gradient(circle at 50% 10%, rgba(159, 122, 234, 0.15) 0%, transparent 50%),
                url('https://images.unsplash.com/photo-1558494949-ef010cbdcc51?q=80&w=2000&auto=format&fit=crop') center/cover no-repeat;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, transparent 20%, var(--bg-white) 100%);
    z-index: -1;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.auth-card {
    background: var(--bg-glass);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-soft);
    text-align: center;
}

.auth-logo {
    height: 60px;
    margin-bottom: 25px;
}

.auth-card h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-pure);
    margin-bottom: 10px;
}

.auth-card p {
    color: var(--text-dim);
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.form-group {
    position: relative;
    margin-bottom: 20px;
    text-align: left;
}

.form-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
}

.form-group input {
    width: 100%;
    padding: 14px 15px 14px 45px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text-pure);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    background: #ffffff;
    border-color: var(--primary-purple);
    box-shadow: 0 0 0 4px rgba(84, 31, 192, 0.05);
}

.btn-auth {
    width: 100%;
    padding: 14px;
    background: var(--primary-purple);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    box-shadow: 0 10px 20px rgba(84, 31, 192, 0.2);
}

.btn-auth:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(84, 31, 192, 0.3);
}

.auth-footer {
    margin-top: 25px;
    font-size: 0.9rem;
    color: var(--text-dim);
}

.auth-footer a {
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 700;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 20px;
    display: none;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.back-home {
    position: absolute;
    top: 30px;
    left: 30px;
    color: var(--primary-purple);
    text-decoration: none;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.back-home:hover {
    transform: translateX(-5px);
}