/* Auth pages – mobile-first cooperative theme */
:root {
    --auth-green-50: #f0fdf4;
    --auth-green-100: #dcfce7;
    --auth-green-200: #bbf7d0;
    --auth-green-500: #22c55e;
    --auth-green-600: #16a34a;
    --auth-green-700: #15803d;
    --auth-blue-500: #3b82f6;
    --auth-blue-600: #2563eb;
    --auth-amber-500: #f59e0b;
    --auth-amber-600: #d97706;
    --auth-red-50: #fef2f2;
    --auth-red-200: #fecaca;
    --auth-red-600: #dc2626;
    --auth-gray-50: #fafafa;
    --auth-gray-100: #f5f5f5;
    --auth-gray-200: #e5e5e5;
    --auth-gray-400: #a3a3a3;
    --auth-gray-500: #737373;
    --auth-gray-600: #525252;
    --auth-gray-700: #404040;
    --auth-gray-800: #262626;
    --auth-radius: 12px;
    --auth-radius-lg: 20px;
    --auth-radius-sheet: 28px;
    --auth-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --auth-transition: 180ms ease;
}

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

.auth-page {
    font-family: 'Prompt', sans-serif;
    min-height: 100dvh;
    color: var(--auth-gray-700);
    display: flex;
    flex-direction: column;
}

/* Concept B: Hero Top */
.auth-page--hero {
    background: var(--auth-green-600);
}

.auth-hero {
    flex-shrink: 0;
    padding: max(48px, calc(env(safe-area-inset-top) + 32px)) 24px 40px;
    text-align: center;
    background: linear-gradient(145deg, var(--auth-green-500) 0%, var(--auth-green-700) 100%);
    color: #fff;
}

.auth-hero__logo {
    width: 96px;
    height: 96px;
    margin: 0 auto 16px;
    border-radius: 50%;
    overflow: hidden;
    background: #fff;
    border: 3px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    flex-shrink: 0;
}

.auth-hero__logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    border-radius: 50%;
}

.auth-hero__title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.auth-hero__sub {
    font-size: 0.875rem;
    opacity: 0.92;
    font-weight: 400;
}

.auth-sheet {
    flex: 1;
    background: #fff;
    border-radius: var(--auth-radius-sheet) var(--auth-radius-sheet) 0 0;
    margin-top: -20px;
    padding: 12px 24px max(28px, env(safe-area-inset-bottom));
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.12);
    max-width: 480px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

.auth-sheet__handle {
    width: 40px;
    height: 4px;
    background: var(--auth-gray-200);
    border-radius: 2px;
    margin: 0 auto 20px;
}

.auth-sheet__inner {
    max-width: 400px;
    margin: 0 auto;
}

/* Alert */
.auth-alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-radius: var(--auth-radius);
    margin-bottom: 20px;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--auth-red-50);
    border: 1px solid var(--auth-red-200);
    color: var(--auth-red-600);
}

.auth-alert i { flex-shrink: 0; margin-top: 2px; }

/* Form */
.auth-form-group {
    margin-bottom: 16px;
}

.auth-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--auth-gray-700);
    margin-bottom: 6px;
}

.auth-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.auth-input-icon {
    position: absolute;
    left: 14px;
    color: var(--auth-gray-400);
    font-size: 0.95rem;
    pointer-events: none;
    z-index: 1;
}

.auth-input {
    width: 100%;
    min-height: 48px;
    padding: 0 44px;
    border: 1px solid var(--auth-gray-200);
    border-radius: var(--auth-radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--auth-gray-800);
    background: var(--auth-gray-50);
    transition: border-color var(--auth-transition), box-shadow var(--auth-transition), background var(--auth-transition);
}

.auth-input:focus {
    outline: none;
    border-color: var(--auth-green-500);
    background: #fff;
    box-shadow: 0 0 0 3px var(--auth-green-100);
}

.auth-input::placeholder {
    color: var(--auth-gray-400);
}

.auth-toggle-pw {
    position: absolute;
    right: 4px;
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--auth-gray-400);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: color var(--auth-transition);
}

.auth-toggle-pw:hover { color: var(--auth-gray-600); }

.auth-toggle-pw:focus-visible {
    outline: 3px solid var(--auth-green-200);
    outline-offset: -2px;
}

/* Buttons */
.auth-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 8px;
}

.auth-actions--extra {
    margin-top: 0;
}

.auth-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 48px;
    padding: 0 20px;
    border: none;
    border-radius: var(--auth-radius);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform var(--auth-transition), box-shadow var(--auth-transition), background var(--auth-transition);
}

.auth-btn:focus-visible {
    outline: 3px solid var(--auth-green-200);
    outline-offset: 2px;
}

.auth-btn--primary {
    background: linear-gradient(135deg, var(--auth-green-500), var(--auth-green-600));
    color: #fff;
    box-shadow: 0 4px 14px rgba(22, 163, 74, 0.3);
}

.auth-btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(22, 163, 74, 0.35);
    color: #fff;
}

.auth-btn--primary:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.auth-btn--secondary {
    background: #fff;
    color: var(--auth-amber-600);
    border: 1.5px solid #fde68a;
}

.auth-btn--secondary:hover {
    background: #fffbeb;
    color: var(--auth-amber-600);
    text-decoration: none;
}

.auth-btn--outline {
    background: #fff;
    color: var(--auth-blue-600);
    border: 1.5px solid #bfdbfe;
}

.auth-btn--outline:hover {
    background: #eff6ff;
    color: var(--auth-blue-600);
    text-decoration: none;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0 12px;
    color: var(--auth-gray-400);
    font-size: 0.75rem;
}

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

.auth-footer {
    text-align: center;
    padding-top: 24px;
    margin-top: 8px;
}

.auth-footer p {
    font-size: 0.7rem;
    color: var(--auth-gray-400);
    line-height: 1.6;
}

/* Install popup */
.install-popup {
    position: fixed;
    bottom: 16px;
    left: 16px;
    right: 16px;
    max-width: 400px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--auth-gray-200);
    border-radius: var(--auth-radius-lg);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 280ms ease, transform 280ms ease;
}

.install-popup.show {
    opacity: 1;
    transform: translateY(0);
}

.install-popup-content { padding: 20px; }

.install-popup-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}

.install-popup-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    object-fit: contain;
    flex-shrink: 0;
}

.install-popup-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--auth-gray-800);
    line-height: 1.3;
}

.install-popup-text {
    font-size: 0.85rem;
    color: var(--auth-gray-500);
    line-height: 1.5;
    margin-bottom: 16px;
}

.install-popup-buttons {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.install-popup-button {
    min-height: 44px;
    padding: 0 18px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--auth-transition);
}

.install-button {
    background: var(--auth-green-600);
    color: #fff;
    border: none;
}

.install-button:hover { background: var(--auth-green-700); }

.close-button {
    background: #fff;
    color: var(--auth-gray-600);
    border: 1px solid var(--auth-gray-200);
}

.close-button:hover { background: var(--auth-gray-50); }

/* Staff login variant (blue theme) */
.auth-page--staff {
    background: var(--auth-blue-600);
}

.auth-page--staff .auth-hero {
    background: linear-gradient(145deg, #3b82f6 0%, #1d4ed8 100%);
}

.auth-page--staff .auth-input:focus {
    border-color: var(--auth-blue-500);
    box-shadow: 0 0 0 3px #dbeafe;
}

.auth-page--staff .auth-toggle-pw:focus-visible {
    outline-color: #bfdbfe;
}

.auth-page--staff .auth-btn:focus-visible {
    outline-color: #bfdbfe;
}

.auth-btn--staff {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.auth-btn--staff:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.4);
    color: #fff;
}

.auth-btn--staff:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.auth-link-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
    text-align: center;
}

.auth-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--auth-blue-600);
    text-decoration: none;
    transition: color var(--auth-transition);
}

.auth-link:hover {
    color: #1d4ed8;
    text-decoration: none;
}

.auth-link--muted {
    color: var(--auth-gray-500);
}

.auth-link--muted:hover {
    color: var(--auth-gray-700);
}

.auth-back-btn {
    position: absolute;
    top: max(12px, env(safe-area-inset-top));
    left: 12px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    z-index: 10;
    transition: background var(--auth-transition);
}

.auth-back-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.auth-back-btn:focus-visible {
    outline: 3px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.auth-hero {
    position: relative;
}

.auth-hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    padding: 6px 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.18);
    font-size: 0.75rem;
    font-weight: 500;
}

@media (min-width: 480px) {
    .auth-page--hero {
        justify-content: center;
        background: linear-gradient(145deg, var(--auth-green-500) 0%, var(--auth-green-700) 50%, var(--auth-gray-50) 50%);
    }

    .auth-page--staff.auth-page--hero {
        background: linear-gradient(145deg, #3b82f6 0%, #1d4ed8 50%, var(--auth-gray-50) 50%);
    }

    .auth-hero {
        padding-top: 56px;
        padding-bottom: 48px;
        background: transparent;
    }

    .auth-hero__logo {
        width: 104px;
        height: 104px;
    }

    .auth-sheet {
        border-radius: var(--auth-radius-lg);
        margin-top: 0;
        margin-bottom: 32px;
        padding: 28px 32px 32px;
        box-shadow: var(--auth-shadow);
    }

    .auth-sheet__handle {
        display: none;
    }
}

@media (min-width: 768px) {
    .auth-page--hero {
        flex-direction: row;
        align-items: stretch;
        background: linear-gradient(90deg, var(--auth-green-600) 42%, var(--auth-gray-50) 42%);
    }

    .auth-page--staff.auth-page--hero {
        background: linear-gradient(90deg, #2563eb 42%, var(--auth-gray-50) 42%);
    }

    .auth-hero {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 48px 40px;
        text-align: center;
    }

    .auth-sheet {
        flex: 0 0 58%;
        max-width: none;
        margin: 0;
        border-radius: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: none;
        background: var(--auth-gray-50);
    }

    .auth-sheet__inner {
        width: 100%;
        max-width: 400px;
        background: #fff;
        padding: 36px 32px;
        border-radius: var(--auth-radius-lg);
        box-shadow: var(--auth-shadow);
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.01ms !important;
    }

    .install-popup {
        transition: none;
    }
}