/* ============================================================
   DESIGN SYSTEM — 땡피싱 v2 (Auth subset)
   ============================================================ */
:root {
    --brand-primary: #2563eb;
    --brand-primary-hover: #1d4ed8;
    --brand-primary-light: #dbeafe;
    --brand-primary-50: #eff6ff;
    --brand-secondary: #0ea5e9;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    --font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
}

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

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
.hidden { display: none !important; }

/* ============================================================
   LOGIN PAGE
   ============================================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}

/* ── Background decoration ── */
.login-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    background: linear-gradient(135deg, var(--brand-primary-50) 0%, #f0f9ff 50%, #f8fafc 100%);
}

.login-bg::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%);
}

.login-bg::after {
    content: '';
    position: absolute;
    bottom: -15%;
    left: -5%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(14,165,233,0.05) 0%, transparent 70%);
}

/* ── Card ── */
.login-card {
    position: relative;
    z-index: 1;
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
    animation: cardFadeIn 0.5s ease;
}

@keyframes cardFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── Card Header (Gradient) ── */
.login-card-header {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    padding: var(--space-10) var(--space-8) var(--space-8);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-card-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 20%, rgba(255,255,255,0.06) 0%, transparent 50%);
}

.login-logo {
    position: relative;
    z-index: 1;
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-5);
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.login-logo img {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
}

.login-logo-fallback {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
}

.login-title {
    position: relative;
    z-index: 1;
    font-size: var(--text-2xl);
    font-weight: 800;
    color: #fff;
    margin-bottom: var(--space-2);
    letter-spacing: -0.3px;
}

.login-subtitle {
    position: relative;
    z-index: 1;
    font-size: var(--text-sm);
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
}

/* ── Card Body ── */
.login-card-body {
    padding: var(--space-8);
}

/* ── Login Required Notice ── */
.login-notice-required {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: #fff7ed;
    border: 1px solid #fed7aa;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    animation: noticeSlide 0.4s ease;
}

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

.login-notice-required-icon {
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.login-notice-required-text {
    font-size: var(--text-sm);
    font-weight: 600;
    color: #c2410c;
}

/* ── Google Login Button ── */
.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: #fff;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-google:hover {
    background: var(--gray-50);
    border-color: var(--gray-300);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transform: translateY(-1px);
}

.btn-google:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-google svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

/* ── Divider ── */
.login-divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

.login-divider span {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--gray-400);
    white-space: nowrap;
}

/* ── Info Box ── */
.login-info-box {
    background: var(--brand-primary-50);
    border-radius: var(--radius-md);
    padding: var(--space-5);
}

.login-info-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--gray-700);
    margin-bottom: var(--space-3);
}

.login-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.login-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--gray-600);
}

.login-info-item i {
    color: var(--brand-primary);
    font-size: var(--text-sm);
    flex-shrink: 0;
}

/* ── Card Footer ── */
.login-card-footer {
    padding: var(--space-5) var(--space-8);
    border-top: 1px solid var(--gray-100);
    text-align: center;
}

.login-footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
}

.login-footer-links a {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--gray-400);
    transition: color 0.15s;
}

.login-footer-links a:hover {
    color: var(--brand-primary);
}

.login-footer-links .divider {
    width: 1px;
    height: 12px;
    background: var(--gray-200);
}

.login-copyright {
    font-size: var(--text-xs);
    color: var(--gray-300);
}

/* ── Back to Home ── */
.login-back {
    position: fixed;
    top: var(--space-6);
    left: var(--space-6);
    z-index: 10;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-600);
    box-shadow: var(--shadow-sm);
    transition: all 0.15s;
}

.login-back:hover {
    background: #fff;
    color: var(--brand-primary);
    box-shadow: var(--shadow-md);
}

/* ── In-App Browser Warning ── */
.login-inapp-warning {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4);
    margin-bottom: var(--space-5);
    background: #fff8e1;
    border-left: 4px solid #ffc107;
    border-radius: var(--radius-lg);
}

.login-inapp-warning-icon {
    flex-shrink: 0;
    font-size: var(--text-lg);
}

.login-inapp-warning-content strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: #856404;
    margin-bottom: var(--space-1);
}

.login-inapp-warning-content p {
    font-size: var(--text-xs);
    color: #856404;
    line-height: 1.6;
    margin: 0;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 480px) {
    .login-page {
        padding: 0;
        align-items: stretch;
    }

    .login-card {
        max-width: 100%;
        border-radius: 0;
        min-height: 100vh;
        box-shadow: none;
    }

    .login-card-header {
        padding: var(--space-8) var(--space-6) var(--space-6);
    }

    .login-title {
        font-size: var(--text-xl);
    }

    .login-card-body {
        padding: var(--space-6);
    }

    .login-card-footer {
        padding: var(--space-5) var(--space-6);
    }

    .login-back {
        top: var(--space-4);
        left: var(--space-4);
    }
}