/**
 * KOREV Evidence — Login Page (Premium)
 * Split layout: brand panel (left) + form panel (right)
 */

/* ── Tokens ── */
:root {
    --ev-bg-deep: #08080a;
    --ev-bg-base: #0d0d0f;
    --ev-bg-surface: #131316;
    --ev-bg-surface-2: #1a1a1f;
    --ev-bg-surface-3: #212128;
    --ev-border: rgba(255, 255, 255, 0.06);
    --ev-border-hover: rgba(255, 255, 255, 0.12);
    --ev-border-focus: rgba(99, 102, 241, 0.5);
    --ev-text-primary: #eaeaef;
    --ev-text-secondary: #9494a0;
    --ev-text-muted: #5c5c68;
    --ev-accent: #6366f1;
    --ev-accent-bright: #818cf8;
    --ev-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);
    --ev-accent-glow: rgba(99, 102, 241, 0.15);
    --ev-radius: 10px;
    --ev-radius-lg: 14px;
    --ev-font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --ev-font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background: var(--ev-bg-deep);
    color: var(--ev-text-primary);
    font-family: var(--ev-font-body);
    min-height: 100vh;
    overflow: hidden;
}

/* ── Layout ── */
.login-layout {
    display: flex;
    min-height: 100vh;
}

/* ── Brand Panel (left) ── */
.login-brand-panel {
    flex: 0 0 44%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: 3rem 3.5rem;
    background: var(--ev-bg-base);
    overflow: hidden;
}

.login-brand-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 70%),
        repeating-linear-gradient(-3deg, transparent, transparent 60px, rgba(255, 255, 255, 0.012) 60px, rgba(255, 255, 255, 0.012) 61px);
    pointer-events: none;
}

.login-brand-panel::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 1px;
    height: 100%;
    background: linear-gradient(to bottom, transparent, rgba(99, 102, 241, 0.2) 30%, rgba(99, 102, 241, 0.2) 70%, transparent);
}

.brand-content {
    position: relative;
    z-index: 1;
    animation: fadeSlideUp 0.7s ease-out both;
}

.brand-logo-wrap {
    position: relative;
    width: 80px;
    height: 80px;
    margin-bottom: 2rem;
}

.brand-glow {
    position: absolute;
    inset: -20px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(15px);
    animation: glowPulse 4s ease-in-out infinite;
}

.brand-logo {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--ev-radius-lg);
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.2));
}

.brand-title {
    font-family: var(--ev-font-display);
    font-size: 2.4rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--ev-text-primary);
    overflow: visible;
}

.brand-title em {
    font-style: italic;
    background: var(--ev-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    padding-right: 0.15em;
}

.brand-tagline {
    font-size: 1.05rem;
    font-weight: 300;
    color: var(--ev-text-secondary);
    margin-top: 0.5rem;
    letter-spacing: 0.01em;
}

.brand-separator {
    width: 48px;
    height: 2px;
    background: var(--ev-accent-gradient);
    border-radius: 1px;
    margin: 2rem 0;
    opacity: 0.6;
}

.brand-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.brand-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--ev-text-secondary);
    line-height: 1.5;
}

.feature-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--ev-accent-bright);
    margin-top: 1px;
}

.brand-footer {
    position: absolute;
    bottom: 2.5rem;
    left: 3.5rem;
    z-index: 1;
}

.brand-copy {
    font-size: 0.75rem;
    color: var(--ev-text-muted);
    letter-spacing: 0.03em;
}

/* ── Form Panel (right) ── */
.login-form-panel {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    background: var(--ev-bg-deep);
}

.login-form-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 80% 40%, rgba(139, 92, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.form-wrapper {
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 1;
    animation: fadeSlideUp 0.7s ease-out 0.15s both;
}

.form-logo-mobile {
    display: none;
    width: 56px;
    height: 56px;
    border-radius: var(--ev-radius);
    margin-bottom: 1.25rem;
}

.form-header {
    margin-bottom: 2.5rem;
}

.form-header h2 {
    font-family: var(--ev-font-display);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--ev-text-primary);
}

.form-subtitle {
    font-size: 0.9rem;
    color: var(--ev-text-secondary);
    margin-top: 0.4rem;
    font-weight: 300;
}

/* ── Form ── */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--ev-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.input-wrap {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ev-text-muted);
    pointer-events: none;
    transition: color 0.2s;
}

.input-wrap:focus-within .input-icon {
    color: var(--ev-accent-bright);
}

.input-group input {
    width: 100%;
    padding: 0.875rem 1rem 0.875rem 2.75rem;
    border: 1px solid var(--ev-border);
    border-radius: var(--ev-radius);
    background: var(--ev-bg-surface);
    color: var(--ev-text-primary);
    font-family: var(--ev-font-body);
    font-size: 0.9375rem;
    transition: all 0.2s ease;
}

.input-group input::placeholder {
    color: var(--ev-text-muted);
    font-weight: 300;
}

.input-group input:hover {
    border-color: var(--ev-border-hover);
    background: var(--ev-bg-surface-2);
}

.input-group input:focus {
    outline: none;
    border-color: var(--ev-border-focus);
    background: var(--ev-bg-surface-2);
    box-shadow: 0 0 0 3px var(--ev-accent-glow), 0 0 20px rgba(99, 102, 241, 0.06);
}

/* ── Button ── */
button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.95rem 1.5rem;
    border: none;
    border-radius: var(--ev-radius);
    background: var(--ev-accent-gradient);
    color: white;
    font-family: var(--ev-font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    margin-top: 0.75rem;
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.25s;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3), 0 2px 8px rgba(99, 102, 241, 0.15);
}

button:hover::before {
    opacity: 1;
}

button:hover .btn-arrow {
    transform: translateX(3px);
}

button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--ev-bg-deep), 0 0 0 4px var(--ev-accent);
}

button:active {
    transform: translateY(0) scale(0.99);
}

.btn-arrow {
    transition: transform 0.25s ease;
}

/* ── Error ── */
.error {
    color: #f87171;
    font-size: 0.85rem;
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    background: rgba(248, 113, 113, 0.08);
    border-radius: var(--ev-radius);
    border: 1px solid rgba(248, 113, 113, 0.15);
    text-align: center;
}

/* ── Form Footer ── */
.form-footer {
    margin-top: 2.5rem;
    text-align: center;
}

.trust-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.badge {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--ev-text-muted);
    letter-spacing: 0.03em;
}

.badge-sep {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--ev-text-muted);
    opacity: 0.5;
}

/* ── Animations ── */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* ── Responsive: tablet ── */
@media (max-width: 960px) {
    .login-brand-panel {
        flex: 0 0 38%;
        padding: 2.5rem;
    }
    .brand-footer { left: 2.5rem; }
    .brand-title { font-size: 2rem; }
}

/* ── Responsive: mobile ── */
@media (max-width: 720px) {
    .login-layout {
        flex-direction: column;
    }

    .login-brand-panel {
        display: none;
    }

    .login-form-panel {
        min-height: 100vh;
        padding: 2rem 1.5rem;
    }

    .form-logo-mobile {
        display: block;
    }

    .form-header h2 {
        font-size: 1.5rem;
    }

    .form-wrapper {
        max-width: 360px;
    }
}