/* ==========================================
   QRCode-RS — Design System
   ========================================== */

:root {
    --font-body: "LXGW WenKai Screen", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

    --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;

    --primary: #0d9488;
    --primary-light: #14b8a6;
    --primary-dark: #0f766e;
    --primary-bg: #f0fdfa;

    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --danger-border: #fecaca;

    --success: #10b981;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;

    --warning: #f59e0b;
    --warning-bg: #fffbeb;

    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

/* ---- Reset & Base ---- */

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

body {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-100);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

/* ---- Animation ---- */

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

.fade-in {
    animation: fadeIn 0.35s ease-out both;
}

/* ---- Layout ---- */

.page-center {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.page-admin {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ---- Buttons ---- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    border-radius: 6px;
    border: 1px solid var(--gray-200);
    background: #fff;
    color: var(--gray-700);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn:hover {
    border-color: var(--gray-300);
    background: var(--gray-50);
    color: var(--gray-800);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--gray-500);
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-outline {
    background: #fff;
    border-color: var(--gray-200);
    color: var(--gray-600);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-block { width: 100%; justify-content: center; }

/* ---- Form Fields ---- */

.field { margin-bottom: 20px; }

.field label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.required { color: var(--danger); }

.field input,
.field textarea {
    width: 100%;
    padding: 10px 12px;
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    color: var(--gray-800);
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.field input::placeholder,
.field textarea::placeholder {
    color: var(--gray-400);
}

.field-hint {
    margin-top: 6px;
    font-size: 12px;
    color: var(--gray-400);
}

/* ---- Alert ---- */

.alert {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 20px;
}

.alert-error {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
}

/* ==========================================
   Login Page
   ========================================== */

.body-login {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 50%, #164e63 100%);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-xl);
}

.login-brand {
    text-align: center;
    margin-bottom: 32px;
}

.brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.login-brand h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

.login-subtitle {
    font-size: 14px;
    color: var(--gray-400);
    margin-top: 4px;
}

.login-form button[type="submit"] {
    margin-top: 8px;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
}

/* ==========================================
   Admin Pages — Topbar
   ========================================== */

.body-admin {
    background: var(--gray-50);
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
    color: var(--gray-900);
}

.topbar-brand svg { color: var(--primary); }

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-user {
    font-size: 13px;
    color: var(--gray-500);
}

/* ---- Admin Main ---- */

.admin-main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px;
    width: 100%;
    flex: 1;
}

.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.admin-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.01em;
}

.admin-card {
    background: #fff;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* ---- Card Toolbar ---- */

.card-toolbar {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 360px;
}

.search-icon {
    position: absolute;
    left: 10px;
    color: var(--gray-400);
    pointer-events: none;
}

.search-bar input {
    width: 100%;
    padding: 8px 32px 8px 34px;
    font-family: var(--font-body);
    font-size: 13px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: var(--gray-50);
    color: var(--gray-700);
    transition: all 0.15s ease;
}

.search-bar input:focus {
    outline: none;
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.search-clear {
    position: absolute;
    right: 8px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--gray-200);
    color: var(--gray-500);
    font-size: 14px;
    line-height: 1;
    text-decoration: none;
}

.search-clear:hover {
    background: var(--gray-300);
    color: var(--gray-700);
}

/* ---- Data Table ---- */

.table-wrap { overflow-x: auto; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    padding: 10px 14px;
    text-align: left;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    white-space: nowrap;
}

.data-table tbody tr { transition: background 0.1s ease; }
.data-table tbody tr:hover { background: var(--gray-50); }
.data-table tbody tr:last-child td { border-bottom: none; }

.col-num { text-align: center; }
.col-action { text-align: center; width: 1%; white-space: nowrap; }

/* ---- Action Buttons (icon-only) ---- */

.action-group {
    display: inline-flex;
    gap: 2px;
    background: var(--gray-50);
    border-radius: 8px;
    padding: 2px;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    color: var(--gray-400);
    transition: all 0.15s ease;
    text-decoration: none;
}

.action-btn:hover {
    background: #fff;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.action-btn-danger:hover {
    color: var(--danger);
}

.cell-time {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--gray-500);
}

.cell-muted { color: var(--gray-400); }

.cell-mono {
    font-family: var(--font-mono);
    font-size: 12px;
}

.text-truncate {
    display: inline-block;
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
}

.cell-empty {
    text-align: center;
    padding: 48px 16px !important;
    color: var(--gray-400);
}

.cell-empty svg { display: block; margin: 0 auto 12px; }

/* ---- Badge ---- */

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    padding: 2px 8px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
}

.badge-idle { background: var(--gray-100); color: var(--gray-500); }
.badge-active { background: var(--primary-bg); color: var(--primary); }
.badge-exhausted { background: var(--danger-bg); color: var(--danger); }

/* ---- Pagination ---- */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 14px 20px;
    border-top: 1px solid var(--gray-100);
    flex-wrap: wrap;
}

.page-info {
    font-size: 13px;
    color: var(--gray-400);
    min-width: 60px;
    text-align: center;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}

.page-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-800);
}

.page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
    pointer-events: none;
}

.page-btn.disabled {
    color: var(--gray-300);
    pointer-events: none;
    cursor: default;
}

.page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    font-size: 14px;
    color: var(--gray-400);
    letter-spacing: 1px;
    user-select: none;
}

.page-sep {
    width: 1px;
    height: 18px;
    background: var(--gray-200);
    margin: 0 6px;
}

.page-jump {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 4px;
    font-size: 13px;
    color: var(--gray-500);
}

.page-jump input {
    width: 48px;
    height: 32px;
    padding: 0 6px;
    font-family: var(--font-mono);
    font-size: 13px;
    text-align: center;
    color: var(--gray-800);
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    outline: none;
    transition: all 0.15s ease;
    -moz-appearance: textfield;
}

.page-jump input::-webkit-outer-spin-button,
.page-jump input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.page-jump input:focus {
    background: #fff;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.page-jump-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    padding: 0 10px;
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-bg);
    border: 1px solid rgba(13, 148, 136, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.page-jump-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ---- Create Form ---- */

.form-create {
    padding: 24px;
    max-width: 520px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-100);
}

.form-actions .btn-primary {
    padding: 10px 24px;
    font-size: 14px;
}

/* ==========================================
   Extract Pages (Public / Mobile)
   ========================================== */

.body-extract {
    background: linear-gradient(160deg, #f0fdfa 0%, var(--gray-100) 100%);
}

.extract-card {
    width: 100%;
    max-width: 480px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
}

.extract-header {
    text-align: center;
    margin-bottom: 28px;
}

.extract-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    margin-bottom: 16px;
}

.extract-icon.success { background: var(--success-bg); color: var(--success); }
.extract-icon.error { background: var(--danger-bg); color: var(--danger); }

.extract-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

.extract-header-success h1 { color: var(--success); }

/* ---- Meta Info ---- */

.extract-meta {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 4px 0;
    margin-bottom: 24px;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
}

.meta-row + .meta-row {
    border-top: 1px solid var(--gray-100);
}

.meta-label {
    font-size: 13px;
    color: var(--gray-500);
}

.meta-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-800);
}

.remaining-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 10px;
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    border-radius: 999px;
}

.remaining-zero {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ---- Extract Button ---- */

.btn-extract {
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius);
}

.extract-tip {
    text-align: center;
    margin-top: 12px;
    font-size: 12px;
    color: var(--gray-400);
}

/* ---- Extract Result ---- */

.result-content {
    padding: 20px;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.result-text {
    font-size: 17px;
    line-height: 1.7;
    color: var(--gray-900);
    word-break: break-all;
    white-space: pre-wrap;
    text-align: center;
}

.btn-copy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    margin-bottom: 24px;
    padding: 10px;
    font-size: 15px;
    transition: background 0.2s, transform 0.1s;
}

.btn-copy:active { transform: scale(0.98); }

.btn-copied {
    background: var(--success) !important;
    border-color: var(--success) !important;
}

/* ---- Extract Empty ---- */

.extract-empty {
    text-align: center;
    padding: 20px 0;
    color: var(--gray-400);
}

.extract-empty svg { display: block; margin: 0 auto 16px; }

.extract-empty p { font-size: 15px; }

.extract-contact {
    text-align: center;
    font-size: 13px;
    color: var(--gray-400);
    margin-top: 12px;
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 640px) {
    .admin-main { padding: 16px; }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .admin-header .btn-primary { width: 100%; justify-content: center; }

    .card-toolbar { padding: 12px 16px; }

    .search-bar { max-width: none; }

    .data-table th { padding: 8px 10px; }
    .data-table td { padding: 8px 10px; font-size: 12px; }

    .text-truncate { max-width: 140px; }

    .action-btn { width: 28px; height: 28px; }
    .action-btn svg { width: 13px; height: 13px; }

    .pagination { gap: 2px; padding: 12px 12px; }
    .page-btn { min-width: 28px; height: 28px; font-size: 12px; }
    .page-ellipsis { width: 24px; height: 28px; font-size: 12px; }
    .page-sep { margin: 0 4px; }
    .page-jump { margin-left: 2px; font-size: 12px; }
    .page-jump input { width: 40px; height: 28px; font-size: 12px; }
    .page-jump-btn { height: 28px; padding: 0 8px; font-size: 11px; }

    .form-create { padding: 20px 16px; }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn { width: 100%; justify-content: center; }

    /* Extract mobile */
    .extract-card {
        padding: 28px 20px;
        border-radius: var(--radius);
    }

    .login-card {
        padding: 32px 24px;
    }

    .topbar-inner { padding: 0 16px; }
}

@media (max-width: 480px) {
    .page-center { padding: 12px; }

    .extract-card { padding: 24px 16px; }
}