/* =================================================================
   EXAMPREP PRO - Modernized Auth Styles (Login / Register)
   Matches Dashboard & Homepage Design System
   Curated by Gajesh Chouhan
   ================================================================= */

:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;

    --dark-bg: #09090b;
    --card-bg: rgba(17, 17, 22, 0.85);
    --card-surface: #121216;
    --input-bg: rgba(255, 255, 255, 0.035);
    --input-border: rgba(255, 255, 255, 0.09);

    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --border-color: rgba(255, 255, 255, 0.08);
    --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-glow: linear-gradient(135deg, rgba(99, 102, 241, 0.4), rgba(139, 92, 246, 0.4));

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Space Grotesk', var(--font-sans);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background: var(--dark-bg);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 24px 16px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Ambient Background Orbs & Tech Grid */
.animated-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(15, 15, 20, 0.8) 0%, #09090b 100%),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

/* Login Container */
.login-container {
    width: 100%;
    max-width: 460px;
    position: relative;
    z-index: 1;
}

/* Login Card */
.login-card {
    position: relative;
    background: var(--card-bg);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 38px 32px;
    box-shadow:
        0 24px 60px -15px rgba(0, 0, 0, 0.8),
        0 0 50px -10px rgba(99, 102, 241, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    overflow: hidden;
    transition: var(--transition);
}

/* Subtle Top Accent Glow */
.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--gradient-1);
    box-shadow: 0 0 20px var(--primary-color);
    border-radius: var(--radius-full);
}

/* Brand Header */
.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.brand-badge {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.35);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
    color: var(--primary-light);
    font-size: 1.6rem;
    transition: var(--transition);
}

.brand-badge:hover {
    transform: scale(1.06) rotate(4deg);
    border-color: rgba(99, 102, 241, 0.6);
}

.login-header h1 {
    font-family: var(--font-display);
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
}

/* Tab Switcher */
.tab-switcher {
    display: flex;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: 26px;
    gap: 4px;
}

.tab-btn {
    flex: 1;
    padding: 10px 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 600;
    border-radius: 9px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--gradient-1);
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

/* Forms */
.form-container {
    display: none;
}

.form-container.active {
    display: block;
    animation: authFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes authFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group label i {
    color: var(--primary-light);
    font-size: 0.85rem;
}

/* Input Fields */
.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.form-group input::placeholder {
    color: var(--text-muted);
    font-size: 0.88rem;
}

.form-group input:hover {
    border-color: rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.05);
}

.form-group input:focus {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.04);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2), 0 4px 20px rgba(99, 102, 241, 0.12);
}

/* Password Toggle Icon */
.pwd-toggle-btn {
    position: absolute;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pwd-toggle-btn:hover {
    color: var(--text-primary);
}

/* Primary Submit Button */
.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--gradient-1);
    border: none;
    border-radius: var(--radius-md);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(99, 102, 241, 0.45);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary i {
    font-size: 0.95rem;
}

/* Form Messages (Success / Error) */
.form-message {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    line-height: 1.5;
    text-align: center;
    display: none;
    animation: authFadeIn 0.2s ease;
}

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

.form-message.success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.form-message.warn {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    width: 100%;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px;
    border-radius: var(--radius-sm);
}

.back-link i {
    font-size: 0.8rem;
    transition: transform var(--transition);
}

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

.back-link:hover i {
    transform: translateX(-3px);
}

/* Feature Badges under form */
.auth-features-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.auth-feature-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
}

.auth-feature-pill i {
    color: var(--primary-light);
    font-size: 0.75rem;
}

/* Responsive */
@media (max-width: 480px) {
    body {
        padding: 16px;
    }
    
    .login-card {
        padding: 28px 20px;
        border-radius: 20px;
    }
    
    .login-header h1 {
        font-size: 1.6rem;
    }
    
    .auth-features-preview {
        flex-direction: column;
        gap: 8px;
    }
}