/* ── Variables ─────────────────────────────────────────────── */
:root {
    --bg:          var(--color-bg);
    --bg-panel:    var(--emerald-900);
    --color-gold:  var(--color-accent);
    --color-blue:  var(--color-primary);
    --color-muted: var(--color-text-secondary);
    --color-error: var(--color-danger);
    --radius:      14px;
    --shadow:      0 8px 40px rgba(0,0,0,0.10);
    --transition:  all 0.2s ease;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    min-height: 100vh;
    background: var(--bg);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
}

/* ── Auth layout ───────────────────────────────────────────── */
.auth-page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 420px 1fr;
}

/* ── Left panel ────────────────────────────────────────────── */
.auth-panel {
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 48px 44px;
    position: relative;
    overflow: hidden;
}
.auth-panel::before {
    content: '';
    position: absolute;
    top: -80px; left: -80px;
    width: 320px; height: 320px;
    background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 12%, transparent) 0%, transparent 70%);
    pointer-events: none;
}
.auth-panel::after {
    content: '';
    position: absolute;
    bottom: -60px; right: -60px;
    width: 280px; height: 280px;
    background: radial-gradient(circle, color-mix(in srgb, var(--color-primary) 10%, transparent) 0%, transparent 70%);
    pointer-events: none;
}

.panel-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-text-inverse);
    text-decoration: none;
    position: relative;
    z-index: 1;
}
.panel-brand-icon {
    width: 40px; height: 40px;
    background: var(--color-gold);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--color-on-accent);
    flex-shrink: 0;
}

.panel-body {
    position: relative;
    z-index: 1;
}
.panel-tagline {
    display: inline-block;
    background: color-mix(in srgb, var(--color-accent) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--color-accent) 25%, transparent);
    color: var(--color-gold-on-dark);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 5px 14px;
    border-radius: 50px;
    margin-bottom: 20px;
}
.panel-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 12px;
}
.panel-subtitle {
    font-size: 0.9rem;
    color: color-mix(in srgb, var(--color-text-inverse) 50%, transparent);
    line-height: 1.6;
    margin-bottom: 36px;
}
.panel-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.panel-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.88rem;
    color: color-mix(in srgb, var(--color-text-inverse) 75%, transparent);
}
.panel-feature-icon {
    width: 32px; height: 32px;
    background: color-mix(in srgb, var(--color-text-inverse) 7%, transparent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--color-gold-on-dark);
    flex-shrink: 0;
}

.panel-footer {
    font-size: 0.78rem;
    color: color-mix(in srgb, var(--color-text-inverse) 25%, transparent);
    position: relative;
    z-index: 1;
}

/* ── Right panel (form) ────────────────────────────────────── */
.auth-form-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 32px;
    background: var(--color-surface);
    overflow-y: auto;
}
.auth-form-inner {
    width: 100%;
    max-width: 440px;
}

/* ── Form header ───────────────────────────────────────────── */
.form-header {
    margin-bottom: 32px;
}
.form-header h1 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}
.form-header p {
    font-size: 0.9rem;
    color: var(--color-muted);
}

/* ── Flash messages ────────────────────────────────────────── */
.flash-box {
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 0.88rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.flash-success { background: var(--color-success-light); border: 1px solid color-mix(in srgb, var(--color-success) 40%, transparent); color: var(--color-success-dark); }
.flash-danger  { background: var(--color-danger-light); border: 1px solid color-mix(in srgb, var(--color-danger) 40%, transparent); color: var(--color-error); }

/* ── Form fields ───────────────────────────────────────────── */
.field-group {
    margin-bottom: 18px;
}
.field-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
    letter-spacing: 0.2px;
}
.field-group .form-control {
    width: 100%;
    background: var(--bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    padding: 11px 14px;
    font-size: 0.93rem;
    color: var(--color-text);
    transition: var(--transition);
    outline: none;
    box-shadow: none;
}
.field-group .form-control:focus {
    border-color: var(--color-blue);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 10%, transparent);
}
.field-group .form-control::placeholder {
    color: var(--color-text-muted);
}
.field-error {
    font-size: 0.78rem;
    color: var(--color-error);
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 2-col grid for register */
.field-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

/* ── Submit button ─────────────────────────────────────────── */
.btn-auth {
    width: 100%;
    background: var(--color-gold);
    color: var(--color-on-accent);
    border: none;
    border-radius: var(--radius);
    padding: 13px;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}
.btn-auth:hover {
    background: var(--color-gold);
    filter: brightness(1.08);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--color-accent) 25%, transparent);
}
.btn-auth:active {
    transform: translateY(0);
    filter: brightness(0.96);
}

/* ── Redirect link ─────────────────────────────────────────── */
.auth-redirect {
    text-align: center;
    margin-top: 24px;
    font-size: 0.88rem;
    color: var(--color-muted);
}
.auth-redirect a {
    color: var(--color-blue);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.15s;
}
.auth-redirect a:hover {
    color: var(--color-gold);
    text-decoration: underline;
}

/* ── Back link ─────────────────────────────────────────────── */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--color-muted);
    text-decoration: none;
    margin-bottom: 32px;
    transition: color 0.15s;
}
.back-link:hover { color: var(--color-gold); }

/* ── Divider ───────────────────────────────────────────────── */
.form-divider {
    border: none;
    border-top: 1.5px solid var(--color-border);
    margin: 24px 0;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
    .auth-page {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    .auth-panel {
        padding: 28px 24px;
        min-height: auto;
    }
    .panel-body { display: none; }
    .panel-footer { display: none; }
    .auth-panel { flex-direction: row; align-items: center; justify-content: space-between; }
    .panel-brand { flex: 1; }
}
@media (max-width: 540px) {
    .auth-form-wrap { padding: 32px 20px; }
    .field-grid-2 { grid-template-columns: 1fr; gap: 0; }
}