/* 登录 / 注册 — Academy 品牌认证页 */
.fe-auth-page {
    margin: 0;
    min-height: 100dvh;
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background:
        radial-gradient(ellipse 70% 50% at 85% 15%, color-mix(in srgb, var(--primary-color, #0288d1) 8%, transparent), transparent 60%),
        radial-gradient(ellipse 50% 40% at 10% 90%, color-mix(in srgb, var(--primary-color, #0288d1) 5%, transparent), transparent 55%),
        var(--bg-primary, #f5f7fa);
    color: var(--text-primary, #0f172a);
}

.fe-auth-layout {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) minmax(320px, 440px);
    min-height: 100dvh;
}

.fe-auth-brand {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 48px 56px;
    color: #fff;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 70% at 20% 10%, rgba(255, 255, 255, 0.14), transparent 60%),
        linear-gradient(155deg, var(--primary-color, #0288d1) 0%, var(--primary-dark, #0277bd) 55%, #01579b 100%);
}

.fe-auth-brand::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -60px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.fe-auth-brand::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -40px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    pointer-events: none;
}

.fe-auth-brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    padding: 8px 14px;
    margin-bottom: 24px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.08em;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color, #0288d1);
}

.fe-auth-brand h1 {
    margin: 0 0 12px;
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.fe-auth-brand p {
    margin: 0;
    max-width: 420px;
    font-size: 0.95rem;
    line-height: 1.65;
    color: rgba(255, 255, 255, 0.88);
}

.fe-auth-brand__features {
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
}

.fe-auth-brand__features li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.9);
}

.fe-auth-brand__features li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.75);
    flex-shrink: 0;
}

.fe-auth-main {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 24px;
    background-image:
        linear-gradient(color-mix(in srgb, var(--primary-color, #0288d1) 3%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in srgb, var(--primary-color, #0288d1) 3%, transparent) 1px, transparent 1px);
    background-size: 28px 28px;
}

.fe-auth-card {
    position: relative;
    width: 100%;
    max-width: 400px;
    padding: 28px 28px 24px;
    border-radius: 18px;
    background: color-mix(in srgb, var(--card-bg, #fff) 96%, transparent);
    border: 1px solid color-mix(in srgb, var(--primary-color, #0288d1) 16%, var(--border-color, #e2e8f0));
    box-shadow:
        0 16px 48px color-mix(in srgb, var(--primary-color, #0288d1) 12%, transparent),
        0 0 0 1px rgba(15, 23, 42, 0.03),
        inset 0 1px 0 rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
}

.fe-auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 3px;
    border-radius: 0 0 6px 6px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--primary-color, #0288d1),
        color-mix(in srgb, var(--primary-color, #0288d1) 60%, #6366f1),
        transparent
    );
    pointer-events: none;
}

.fe-auth-card__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 18px;
    border-radius: 14px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: #fff;
    background: var(--gradient-primary, linear-gradient(135deg, #0288d1, #0277bd));
    box-shadow: 0 8px 24px color-mix(in srgb, var(--primary-color, #0288d1) 38%, transparent);
}

.fe-auth-card h2 {
    margin: 0 0 6px;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary, #0f172a);
}

.fe-auth-card__hint {
    margin: 0 0 22px;
    font-size: 0.85rem;
    color: var(--text-secondary, #64748b);
}

.fe-auth-form .form-group {
    margin-bottom: 16px;
    text-align: left;
}

.fe-auth-form label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary, #334155);
}

.fe-auth-form input,
.fe-auth-form select {
    width: 100%;
    padding: 11px 12px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary, #0f172a);
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #e2e8f0);
    border-radius: 10px;
    box-sizing: border-box;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.fe-auth-form input:focus,
.fe-auth-form select:focus {
    outline: none;
    border-color: var(--primary-color, #0288d1);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color, #0288d1) 18%, transparent);
}

.fe-auth-form .form-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-tertiary, #94a3b8);
}

.fe-auth-btn {
    width: 100%;
    margin-top: 8px;
    padding: 12px 18px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    color: #fff;
    background: var(--gradient-primary, linear-gradient(135deg, #0288d1, #0277bd));
    border: none;
    border-radius: 11px;
    cursor: pointer;
    letter-spacing: 0.02em;
    box-shadow:
        0 4px 14px color-mix(in srgb, var(--primary-color, #0288d1) 35%, transparent),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.fe-auth-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    filter: brightness(1.04);
    box-shadow:
        0 8px 26px color-mix(in srgb, var(--primary-color, #0288d1) 42%, transparent),
        inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.fe-auth-btn:active:not(:disabled) {
    transform: translateY(0);
}

.fe-auth-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.fe-auth-message {
    margin-top: 14px;
    padding: 10px 12px;
    font-size: 13px;
    border-radius: 8px;
    display: none;
}

.fe-auth-message.error {
    display: block;
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.fe-auth-message.success {
    display: block;
    background: #f0fdf4;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.fe-auth-footer-link {
    margin-top: 20px;
    font-size: 13px;
    text-align: center;
    color: var(--text-secondary, #64748b);
}

.fe-auth-footer-link a {
    color: var(--primary-color, #0288d1);
    font-weight: 600;
    text-decoration: none;
}

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

.fe-auth-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary, #64748b);
    text-decoration: none;
}

.fe-auth-back:hover {
    color: var(--primary-color, #0288d1);
}

@media (max-width: 860px) {
    .fe-auth-layout {
        grid-template-columns: 1fr;
    }

    .fe-auth-brand {
        padding: 32px 24px 28px;
    }

    .fe-auth-brand__features {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .fe-auth-btn:hover:not(:disabled) {
        transform: none;
    }
}