/* ── Theme Variables ── */
:root {
    --bg-body: #f3f4f6;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f9fafb;
    --bg-muted: #f3f4f6;
    --bg-toolbar: #f0f1f3;
    --border: #e5e7eb;
    --border-strong: #d1d5db;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --accent: #e63920;
    --accent-hover: #c42f19;
    --accent-light: #fef2f2;
    --success: #059669;
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --danger-bg: #fef2f2;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius: 10px;
    --radius-sm: 6px;
    --pdf-bg: #6b7280;
}

[data-theme="dark"] {
    --bg-body: #111318;
    --bg-surface: #1c1f28;
    --bg-surface-hover: #252933;
    --bg-muted: #20232d;
    --bg-toolbar: #20232d;
    --border: #2e3244;
    --border-strong: #404660;
    --text-primary: #e8eaf0;
    --text-secondary: #8b91a8;
    --text-muted: #5c6178;
    --accent: #f04b35;
    --accent-hover: #d93d28;
    --accent-light: #2c1a18;
    --success: #3ecf8e;
    --success-bg: #0b2117;
    --success-border: #0d4a30;
    --warning: #f5a623;
    --warning-bg: #221900;
    --warning-border: #7a4b00;
    --danger: #f04b35;
    --danger-hover: #d93d28;
    --danger-bg: #2c1a18;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.55);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.65);
    --pdf-bg: #2a2d38;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Header ── */
header {
    background: color-mix(in srgb, var(--bg-surface) 88%, transparent);
    backdrop-filter: blur(16px) saturate(1.5);
    -webkit-backdrop-filter: blur(16px) saturate(1.5);
    padding: 0 32px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

[data-theme="dark"] header {
    background: color-mix(in srgb, var(--bg-surface) 80%, transparent);
    border-bottom-color: var(--border);
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo svg {
    height: 28px;
    width: auto;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3px;
}

.lang-btn {
    padding: 3px 9px;
    border-radius: 14px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: background 0.18s, color 0.18s;
    line-height: 1.6;
}

.lang-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-hover);
}

.lang-btn.active {
    background: var(--accent);
    color: #fff;
}

/* Theme Toggle */
.theme-toggle {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
    transform: rotate(15deg);
}

.theme-toggle:active {
    transform: scale(0.9) rotate(30deg);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    position: absolute;
}

.theme-toggle .icon-sun {
    transform: rotate(0deg) scale(1);
    opacity: 1;
}

.theme-toggle .icon-moon {
    transform: rotate(-90deg) scale(0);
    opacity: 0;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    transform: rotate(90deg) scale(0);
    opacity: 0;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    transform: rotate(0deg) scale(1);
    opacity: 1;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.15s ease;
    line-height: 1.4;
    white-space: nowrap;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 1px 3px rgba(230, 57, 32, 0.2);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(230, 57, 32, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(230, 57, 32, 0.2);
}

.btn-secondary {
    background: var(--bg-muted);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
    background: var(--bg-muted);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.btn-small:hover {
    background: var(--bg-surface-hover);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.btn-large {
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-danger {
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

.btn-success {
    background: var(--success);
    color: #fff;
    font-weight: 600;
    padding: 12px 24px;
    font-size: 15px;
}

.btn-success:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* ── Main ── */
main {
    max-width: 1160px;
    margin: 32px auto;
    padding: 0 24px;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

/* ── Notice ── */
.notice {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    padding: 20px 24px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: noticeIn 0.3s ease;
}

@keyframes noticeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.notice svg {
    width: 20px;
    height: 20px;
    color: var(--warning);
    flex-shrink: 0;
}

.notice p {
    color: var(--text-primary);
    font-size: 14px;
}

.notice a {
    color: var(--accent);
    font-weight: 500;
}

/* ── File List ── */
.file-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-card {
    background: var(--bg-surface);
    padding: 14px 20px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 14px;
    border: 1px solid var(--border);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.file-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

[data-theme="dark"] .file-card {
    background: var(--bg-surface);
}

[data-theme="dark"] .file-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.45);
    border-color: var(--border-strong);
}

.file-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.file-card:hover .file-icon {
    transform: scale(1.08);
}

.file-icon.unsigned {
    background: var(--warning-bg);
    color: var(--warning);
}

.file-icon.signed {
    background: var(--success-bg);
    color: var(--success);
}

.file-icon svg {
    width: 20px;
    height: 20px;
}

.file-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.file-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

.file-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-status {
    font-size: 12px;
    color: var(--text-muted);
}

.file-status.signed {
    color: var(--success);
}

.file-status.unsigned {
    color: var(--warning);
}

/* ── Sign Page ── */
.sign-page {
    display: grid;
    grid-template-columns: 1fr 380px;
    height: calc(100vh - 61px);
    overflow: hidden;
}

.sign-left {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.pdf-bar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 16px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    height: 42px;
}

.tb-sep {
    width: 1px;
    height: 22px;
    background: var(--border);
    margin: 0 8px;
}

.tb-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.tb-btn:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}

.tb-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

.tb-btn:disabled:hover {
    background: transparent;
}

.tb-label {
    font-size: 12px;
    font-weight: 600;
    min-width: 44px;
    text-align: center;
    color: var(--text-muted);
    user-select: none;
}

.pdf-area {
    flex: 1;
    overflow: hidden;
    background: var(--pdf-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.pdf-area canvas {
    box-shadow: 0 4px 32px rgba(0,0,0,0.35);
    border-radius: 2px;
}

/* ── Sign Right ── */
.sign-right {
    display: flex;
    flex-direction: column;
    background: var(--bg-surface);
    border-left: 1px solid var(--border);
    overflow: hidden;
}

.sign-right-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 24px;
    height: 42px;
    flex-shrink: 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.sign-right-header svg {
    flex-shrink: 0;
    color: var(--accent);
}

.sign-right-body {
    flex: 1;
    overflow-y: auto;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
}

.sign-right-body .form-group {
    margin-bottom: 18px;
}

.sign-right-body .form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sign-right-body .form-group input[type="text"] {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 14px;
    font-family: inherit;
    background: var(--bg-body);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.sign-right-body .form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(230, 57, 32, 0.1);
}

.sign-right-body .btn {
    border-radius: 12px;
}

#success-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 24px;
}

.sign-success {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    border-radius: 16px;
    padding: 36px 28px 28px;
    gap: 10px;
    width: 100%;
    animation: successFadeIn 0.4s ease;
}

@keyframes successFadeIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.sign-success-badge {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 4px 16px rgba(5, 150, 105, 0.3);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
    animation: successPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes successPop {
    0% { transform: scale(0) rotate(-20deg); opacity: 0; }
    60% { transform: scale(1.1) rotate(5deg); opacity: 1; }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

.sign-success strong {
    font-size: 15px;
    color: var(--text-primary);
}

.sign-success p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.4;
    margin: 0;
}

.sign-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 10px;
    transition: all 0.15s;
}

.sign-back-link:hover {
    color: var(--accent);
    background: var(--accent-light);
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="password"] {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    background: var(--bg-muted);
    color: var(--text-primary);
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(230, 57, 32, 0.1);
    background: var(--bg-surface);
}

.form-group small {
    display: block;
    color: var(--text-muted);
    margin-top: 4px;
    font-size: 13px;
}

/* ── Signature Preview ── */
.sig-preview {
    position: relative;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #fff;
    cursor: pointer;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.sig-preview:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(230, 57, 32, 0.1);
}

.sig-preview canvas {
    display: block;
    width: 100%;
    height: 100px;
    pointer-events: none;
}

.sig-preview-hint {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
    transition: opacity 0.2s;
}

.sig-preview.has-signature .sig-preview-hint {
    opacity: 0;
}

/* ── Signature Modal ── */
.sig-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s, visibility 0.25s;
}

.sig-modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

.sig-modal {
    background: var(--bg-surface);
    border-radius: 16px;
    box-shadow: 0 12px 48px rgba(0,0,0,0.2), 0 4px 16px rgba(0,0,0,0.1);
    width: 90vw;
    max-width: 800px;
    overflow: hidden;
    transform: scale(0.95) translateY(10px);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border);
}

.sig-modal-overlay.open .sig-modal {
    transform: scale(1) translateY(0);
}

.sig-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
}

.sig-modal-actions {
    display: flex;
    gap: 8px;
}

.sig-modal-body {
    padding: 4px;
    background: #fff;
    cursor: crosshair;
}

.sig-modal-body canvas {
    display: block;
    width: 100%;
    height: 300px;
    touch-action: none;
}

/* ── Success (list pages) ── */
.success-section {
    text-align: center;
}

.success-box {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    padding: 24px 20px;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.success-box .success-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--success);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-box .success-icon svg {
    width: 20px;
    height: 20px;
}

.success-box h2 {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 0;
}

.success-box p {
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 4px;
    line-height: 1.4;
}

/* ── Login ── */
.login-box {
    max-width: 400px;
    margin: 80px auto;
    background: var(--bg-surface);
    padding: 44px 40px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
    text-align: center;
    animation: loginFadeIn 0.4s ease;
}

@keyframes loginFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-box h1 {
    margin-bottom: 24px;
}

.login-box form {
    text-align: left;
}

.error-msg {
    background: var(--danger-bg);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.15s;
}

.back-link:hover {
    color: var(--accent);
}

.back-link svg {
    width: 16px;
    height: 16px;
}

/* ── Admin ── */
.admin-header {
    margin-bottom: 28px;
}

.admin-header h1 {
    margin-bottom: 6px;
}

.admin-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.admin-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

[data-theme="dark"] .stat-card {
    background: var(--bg-surface);
}

[data-theme="dark"] .stat-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.45);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.stat-card:hover .stat-icon {
    transform: scale(1.08);
}

.stat-icon svg {
    width: 22px;
    height: 22px;
}

.stat-icon.orange {
    background: var(--warning-bg);
    color: var(--warning);
}

.stat-icon.green {
    background: var(--success-bg);
    color: var(--success);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

.admin-section {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.admin-section:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

.admin-section + .admin-section {
    margin-top: 14px;
}

[data-theme="dark"] .admin-section {
    background: var(--bg-surface);
    border-color: var(--border);
}

[data-theme="dark"] .admin-section:hover {
    border-color: var(--border-strong);
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}

.admin-section-header {
    padding: 16px 22px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.admin-section-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.admin-section-icon svg {
    width: 18px;
    height: 18px;
}

.admin-section-icon.orange {
    background: var(--warning-bg);
    color: var(--warning);
}

.admin-section-icon.green {
    background: var(--success-bg);
    color: var(--success);
}

.admin-section-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.admin-section-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 1px;
}

.admin-section-body {
    padding: 18px 22px;
}

.admin-box {
    max-width: 640px;
    margin: 0 auto;
}

/* wider wrap used by the grid admin layout */
.admin-wrap {
    max-width: 1120px;
    margin: 0 auto;
}

.admin-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 28px 0;
}

.save-msg {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.save-msg svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.save-msg.success {
    background: var(--success-bg);
    color: var(--success);
}

.save-msg.error {
    background: var(--danger-bg);
    color: var(--danger);
}

/* ── Directory Browser ── */
.selected-dir {
    background: var(--bg-muted);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.selected-dir svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.selected-dir.configured svg {
    color: var(--success);
}

.selected-dir.not-configured {
    color: var(--text-muted);
    font-style: italic;
}

.selected-dir em {
    color: var(--text-muted);
}

.browser-box {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-top: 16px;
    overflow: hidden;
}

.browser-header {
    background: var(--bg-toolbar);
    padding: 10px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    word-break: break-all;
}

.browser-path {
    font-family: 'JetBrains Mono', monospace;
}

.browser-actions {
    padding: 10px 16px;
    display: flex;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.pdf-found-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--success-bg);
    border-bottom: 1px solid var(--success-border);
    gap: 12px;
    flex-wrap: wrap;
}

.pdf-found-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--success);
}

.browser-list {
    max-height: 350px;
    overflow-y: auto;
}

.browser-list p {
    padding: 20px;
    text-align: center;
    color: var(--text-muted);
}

.browser-item {
    padding: 10px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    transition: background 0.1s;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.browser-item:hover {
    background: var(--accent-light);
}

.browser-item:last-child {
    border-bottom: none;
}

.pdf-item {
    color: var(--text-muted);
    cursor: default;
    background: var(--bg-surface);
    font-size: 13px;
}

.pdf-item:hover {
    background: var(--bg-surface);
}

.empty-dir {
    color: var(--text-muted);
    font-style: italic;
}

.browser-shortcuts {
    border-bottom: 1px solid var(--border);
}

.browser-section-title {
    padding: 8px 16px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--bg-toolbar);
    letter-spacing: 1px;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.shortcut-path {
    font-size: 12px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 0;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.tab-indicator {
    position: absolute;
    bottom: -1px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px 2px 0 0;
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1), width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: color 0.2s;
    margin-bottom: -1px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab svg {
    width: 16px;
    height: 16px;
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--accent);
    border-bottom-color: transparent;
}

.tab-count {
    background: var(--bg-muted);
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 700;
    transition: background 0.2s, color 0.2s;
}

.tab.active .tab-count {
    background: var(--accent-light);
    color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: tabSlideIn 0.35s cubic-bezier(0.4, 0, 0.2, 1) both;
}

@keyframes tabSlideIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Toast Notifications ── */
.toast-container {
    position: fixed;
    top: 72px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    min-width: 300px;
    max-width: 420px;
    pointer-events: auto;
    animation: toastIn 0.25s ease;
    transition: opacity 0.2s, transform 0.2s;
}

[data-theme="dark"] .toast {
    background: var(--bg-surface);
    border-color: var(--border-strong);
    box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.toast.toast-out {
    opacity: 0;
    transform: translateX(20px);
}

.toast-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 1px;
}

.toast-body {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    line-height: 1;
}

.toast-close:hover {
    color: var(--text-primary);
}

.toast.toast-error .toast-icon { color: var(--danger); }
.toast.toast-success .toast-icon { color: var(--success); }
.toast.toast-warning .toast-icon { color: var(--warning); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px) scale(0.96); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

/* ── Confirm Modal ── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.15s ease;
}

[data-theme="dark"] .modal-backdrop {
    background: rgba(0,0,0,0.6);
}

.modal-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.2s ease;
}

.modal-box h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.modal-box p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* ── Theme Transition ── */
html.theme-transition,
html.theme-transition *,
html.theme-transition *::before,
html.theme-transition *::after {
    transition: background 0.4s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ── Theme Popup Pill ── */
.theme-popup {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 10px 22px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-lg);
    z-index: 10001;
    opacity: 0;
    pointer-events: none;
    animation: pillIn 0.35s cubic-bezier(0.34,1.56,0.64,1) forwards;
}

.theme-popup.pill-out {
    animation: pillOut 0.3s ease forwards;
}

.theme-popup svg {
    width: 18px;
    height: 18px;
    color: var(--accent);
    flex-shrink: 0;
}

.theme-popup span {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

@keyframes pillIn {
    0% { opacity: 0; transform: translateX(-50%) translateY(20px) scale(0.9); }
    100% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}

@keyframes pillOut {
    0% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
    100% { opacity: 0; transform: translateX(-50%) translateY(20px) scale(0.9); }
}

/* ── Responsive ── */
@media (max-width: 600px) {
    header {
        padding: 0 16px;
        height: 52px;
    }

    main {
        padding: 0 14px;
        margin: 16px auto;
    }

    h1 {
        font-size: 20px;
    }

    .file-card {
        flex-wrap: wrap;
        gap: 10px;
    }

    .file-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .sign-section {
        padding: 20px;
    }

    .canvas-wrapper canvas {
        height: 120px;
    }

    .sign-page {
        grid-template-columns: 1fr;
        grid-template-rows: 55vh 1fr;
    }

    .sign-right {
        border-left: none;
        border-top: 1px solid var(--border);
    }

    .toast-container {
        left: 12px;
        right: 12px;
    }

    .toast {
        min-width: 0;
        max-width: none;
    }

    .tab {
        padding: 8px 14px;
        font-size: 13px;
    }

    .admin-stats {
        grid-template-columns: 1fr;
    }

    .admin-section-body {
        padding: 14px 16px;
    }
}

/* ── Selection Color ── */
::selection {
    background: rgba(230, 57, 32, 0.15);
    color: var(--text-primary);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ── Subtle page entry ── */
main {
    animation: pageIn 0.35s ease;
}

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

/* ── Local Mode ── */
.lm-card {
    max-width: 520px;
    margin: 40px auto 0;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: pageIn 0.3s ease;
}

.lm-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(230, 57, 32, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.lm-card-icon--ready {
    background: rgba(34, 197, 94, 0.12);
    color: #16a34a;
}

[data-theme="dark"] .lm-card-icon--ready {
    color: #4ade80;
}

.lm-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.lm-card-sub {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.lm-divider {
    height: 1px;
    background: var(--border);
    margin: 0 -32px;
}

.lm-folder-row {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lm-folder-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.lm-folder-pick {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lm-folder-name {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lm-folder-name.is-set {
    color: var(--text-primary);
    font-weight: 500;
}

.lm-folder-summary {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lm-folder-summary-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
}

.lm-folder-summary-label {
    color: var(--text-muted);
    min-width: 60px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
}

.lm-folder-summary-name {
    color: var(--text-primary);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lm-actions {
    display: flex;
    gap: 8px;
}

/* Active state topbar */
.lm-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.lm-topbar-folders {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    flex-wrap: wrap;
}

.lm-topbar-folder {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.lm-topbar-folder strong {
    color: var(--text-primary);
    font-weight: 600;
}

.lm-topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lm-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.lm-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    flex-shrink: 0;
    animation: lmPulse 2s ease-in-out infinite;
}

@keyframes lmPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.85); }
}

@media (max-width: 600px) {
    .lm-card {
        margin: 16px auto 0;
        padding: 20px;
    }
    .lm-topbar {
        flex-direction: column;
        align-items: flex-start;
    }
    .lm-topbar-folders {
        flex-direction: column;
        gap: 4px;
    }
}