/**
 * Shared UI — combobox, modals, locale settings, buttons.
 * Loaded by SPA (via style.css @import) and landing page.
 */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --border: rgba(139, 92, 246, 0.2);
    --border-hover: rgba(139, 92, 246, 0.4);
    --text-primary: #e4e4e7;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #8b5cf6;
    --bg-hover: rgba(139, 92, 246, 0.08);
    --violet-400: #a78bfa;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-xl: 20px;
    --glass-blur: blur(20px);
    --glass-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(139, 92, 246, 0.1);
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Icon button (globe trigger) ===== */
.icon-btn {
    padding: 7px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    background: transparent;
    border: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
    display: block;
}

.locale-settings-btn:hover {
    color: var(--violet-400);
}

.landing-locale-btn.icon-btn,
.landing-locale-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 10px;
    border: 1px solid rgba(139, 92, 246, 0.35);
    background: rgba(0, 0, 0, 0.25);
    color: #e4e4e7;
}

.landing-locale-btn.icon-btn:hover,
.landing-locale-btn:hover {
    color: #c4b5fd;
    border-color: rgba(139, 92, 246, 0.55);
    background: rgba(139, 92, 246, 0.12);
}

/* ===== Buttons (modal footer) ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
    background: rgba(30, 30, 46, 0.6);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: var(--text-primary);
}

.btn:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: #8b5cf6;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

.btn-primary,
.btn.btn-primary {
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid var(--border-hover);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: none;
}

.btn-primary:hover,
.btn.btn-primary:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: #8b5cf6;
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.35);
}

.btn-secondary {
    background: rgba(30, 30, 46, 0.6);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: rgba(139, 92, 246, 0.15);
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

/* ===== Textarea ===== */
.ui-textarea {
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    background: rgba(30, 30, 46, 0.8);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.88rem;
    line-height: 1.5;
    outline: none;
    resize: vertical;
    min-height: 88px;
    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        background var(--transition-fast);
}

.ui-textarea::placeholder {
    color: var(--text-muted);
}

.ui-textarea:hover:not(:disabled):not(:read-only) {
    border-color: rgba(139, 92, 246, 0.45);
}

.ui-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
    background: rgba(30, 30, 46, 0.92);
}

.ui-textarea:disabled,
.ui-textarea:read-only {
    opacity: 0.72;
    cursor: default;
    resize: none;
}

.ui-textarea--sm {
    min-height: 72px;
    padding: 10px 12px;
    font-size: 0.85rem;
}

.ui-textarea--lg {
    min-height: 160px;
    font-size: 0.84rem;
    line-height: 1.55;
}

.ui-textarea--mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.78rem;
    line-height: 1.45;
    white-space: pre;
    overflow: auto;
}

.ui-textarea--code {
    min-height: 280px;
    max-height: 50vh;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.28);
}

/* ===== Dialog / Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: rgba(15, 15, 23, 0.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-base);
    box-shadow: var(--glass-shadow);
    font-family: var(--font-sans);
    color: var(--text-primary);
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    font-family: var(--font-sans);
    margin: 0;
}

.modal-close {
    padding: 4px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--accent);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.modal-body {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ===== Locale settings modal ===== */
.locale-settings-modal {
    max-width: 420px;
    padding: 0;
    overflow: visible;
}

.locale-settings-modal .modal-header {
    gap: 12px;
    padding: 20px 22px 16px;
    border-bottom: 1px solid var(--border);
    margin: 0;
    position: relative;
    z-index: 1;
    background: rgba(15, 15, 23, 0.98);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.locale-settings-modal .modal-title {
    font-size: 1.05rem;
}

.locale-settings-body {
    padding: 18px 22px 12px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow: visible;
}

.locale-settings-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.locale-settings-modal .ui-combobox.is-open {
    z-index: 3;
}

.locale-settings-modal .ui-combobox-menu {
    z-index: 60;
}

.locale-timezone-field .ui-combobox-menu {
    max-height: min(52vh, 320px);
}

.locale-settings-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.locale-settings-footer {
    display: flex;
    gap: 10px;
    padding: 16px 22px 20px;
    border-top: 1px solid var(--border);
    margin: 0;
    justify-content: stretch;
    position: relative;
    z-index: 1;
    background: rgba(15, 15, 23, 0.98);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.locale-settings-footer .btn {
    flex: 1;
    min-height: 42px;
}

.locale-settings-modal .ui-combobox-option-prefix {
    background: transparent;
    width: auto;
    min-width: 24px;
    height: auto;
    font-size: 1.05rem;
    line-height: 1;
}

.locale-settings-modal .ui-combobox-option-prefix:has(.ui-flag-icon) {
    min-width: 0;
    font-size: inherit;
}

.locale-settings-overlay {
    z-index: 1100;
}

body.locale-settings-open {
    overflow: hidden;
}

/* ===== Combobox ===== */
.ui-combobox {
    position: relative;
    width: 100%;
}

.ui-combobox-compact {
    width: auto;
    min-width: 6.75rem;
    max-width: 8.5rem;
}

.ui-combobox-compact .ui-combobox-trigger {
    min-height: 44px;
    padding: 0 0.55rem 0 0.75rem;
    gap: 6px;
}

.ui-combobox-compact .ui-combobox-value {
    gap: 6px;
}

.ui-combobox-compact .ui-combobox-option-text {
    font-size: 0.82rem;
}

.ui-combobox-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    width: 100%;
    min-height: 44px;
    padding: 0 1rem 0 1.25rem;
    border-radius: var(--radius-md);
    background: rgba(30, 30, 46, 0.8);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: var(--text-primary);
    font-size: 0.88rem;
    font-family: var(--font-sans);
    font-weight: 600;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    box-sizing: border-box;
    text-align: left;
}

.ui-combobox-trigger:hover {
    border-color: rgba(139, 92, 246, 0.45);
}

.ui-combobox-search-trigger {
    cursor: text;
    padding-right: 0.5rem;
}

.ui-combobox-search-input {
    flex: 1;
    min-width: 0;
    width: 100%;
    border: none;
    background: transparent;
    color: inherit;
    font-size: inherit;
    font-family: inherit;
    font-weight: 600;
    letter-spacing: 0.03em;
    outline: none;
    padding: 0;
}

.ui-combobox-search-input::placeholder {
    color: var(--text-muted);
    font-weight: 500;
}

.ui-combobox-search-trigger .ui-combobox-chevron {
    cursor: pointer;
    pointer-events: auto;
    flex-shrink: 0;
    padding: 10px 12px 10px 8px;
    margin: -10px -4px -10px 0;
    box-sizing: content-box;
}

.ui-combobox.is-open .ui-combobox-search-trigger,
.ui-combobox-search-trigger:focus-within {
    border-color: #8b5cf6;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
    outline: none;
}

.ui-combobox.is-open .ui-combobox-trigger,
.ui-combobox-trigger:focus-visible {
    border-color: #8b5cf6;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
    outline: none;
}

.ui-combobox-value {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    flex: 1;
}

.ui-combobox-chevron {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.ui-combobox.is-open .ui-combobox-chevron {
    transform: rotate(180deg);
    color: var(--text-primary);
}

.ui-combobox-menu {
    position: absolute;
    z-index: 50;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 6px;
    list-style: none;
    border-radius: var(--radius-md);
    background: rgba(22, 22, 34, 0.98);
    border: 1px solid rgba(139, 92, 246, 0.35);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(139, 92, 246, 0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    max-height: 240px;
    overflow-y: auto;
}

.ui-combobox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: calc(var(--radius-md) - 4px);
    color: var(--text-secondary);
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.ui-combobox-option:hover {
    background: rgba(139, 92, 246, 0.12);
    color: var(--text-primary);
}

.ui-combobox-option.is-selected {
    background: rgba(139, 92, 246, 0.18);
    color: var(--text-primary);
}

.ui-combobox-option[hidden] {
    display: none;
}

.ui-combobox-group {
    list-style: none;
    margin: 0;
    padding: 10px 12px 4px;
    position: sticky;
    top: 0;
    z-index: 1;
    background: rgba(22, 22, 34, 0.98);
}

.ui-combobox-group:first-child {
    padding-top: 4px;
}

.ui-combobox-group[hidden] {
    display: none;
}

.ui-combobox-group-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.ui-combobox-option-prefix {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.06);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1;
    flex-shrink: 0;
}

.ui-combobox-option-prefix:has(.ui-flag-icon) {
    width: auto;
    height: auto;
    padding: 0;
    background: transparent;
    border-radius: 0;
}

.ui-flag-icon {
    display: block;
    width: 18px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.locale-settings-modal .ui-flag-icon {
    width: 20px;
    height: 13px;
    border-radius: 3px;
}

.locale-settings-modal .ui-combobox-option.is-selected .ui-combobox-option-prefix:not(:has(.ui-flag-icon)),
.locale-settings-modal .ui-combobox-value .ui-combobox-option-prefix:not(:has(.ui-flag-icon)) {
    background: transparent;
}

.ui-combobox-option.is-selected .ui-combobox-option-prefix:not(:has(.ui-flag-icon)),
.ui-combobox-value .ui-combobox-option-prefix:not(:has(.ui-flag-icon)) {
    background: rgba(139, 92, 246, 0.28);
    color: #ede9fe;
}

.ui-combobox-option-text {
    flex: 1;
    min-width: 0;
    letter-spacing: 0.03em;
}

.ui-combobox-option-hint {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-muted);
}

.ui-combobox-placeholder {
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== Email @domain suggestions ===== */
.email-suggest-anchor {
    position: relative;
    overflow: visible;
}

.email-suggest-menu {
    position: absolute;
    z-index: 40;
    margin: 0;
    padding: 4px;
    list-style: none;
    background: var(--bg-secondary, #1a1a2e);
    border: 1px solid rgba(139, 92, 246, 0.35);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    max-height: 220px;
    overflow-y: auto;
}

.email-suggest-item {
    display: flex;
    align-items: center;
    gap: 0;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.88rem;
    line-height: 1.3;
    color: var(--text-primary);
    transition: background 0.12s ease;
}

.email-suggest-item:hover,
.email-suggest-item.is-active {
    background: rgba(139, 92, 246, 0.15);
}

.email-suggest-local {
    color: var(--text-muted);
    max-width: 55%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.email-suggest-domain {
    color: #c4b5fd;
    font-weight: 600;
    flex-shrink: 0;
}

/* ===== UI hint (reusable field helper text) ===== */
.ui-hint {
    margin: 0;
    font-size: 0.72rem;
    line-height: 1.45;
    color: var(--text-muted);
}

.ui-hint--inline {
    display: inline;
}

.ui-hint-link {
    color: var(--accent);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.ui-hint-link:hover {
    color: var(--text-primary);
}

.ui-hint-body {
    display: inline-flex;
    align-items: flex-start;
    gap: 6px;
}

.ui-hint-icon {
    flex-shrink: 0;
    margin-top: 1px;
    opacity: 0.85;
}

.ui-hint-text {
    min-width: 0;
}

.ui-hint--info {
    color: var(--text-secondary);
}

.ui-hint--info .ui-hint-icon {
    color: #60a5fa;
}

.ui-hint--success {
    color: #86efac;
}

.ui-hint--success .ui-hint-icon {
    color: #4ade80;
}

.ui-hint--warning {
    color: #fcd34d;
}

.ui-hint--warning .ui-hint-icon {
    color: #fbbf24;
}

/* Legacy alias — prefer renderUiHint() in new code */
.form-hint {
    margin: 0;
    font-size: 0.72rem;
    line-height: 1.45;
    color: var(--text-muted);
}

/* ===== UI hint tip (hover / focus bubble) ===== */
.ui-hint-tip {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.ui-hint-tip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-muted);
    cursor: default;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.ui-hint-tip-icon:hover,
.ui-hint-tip:focus-within .ui-hint-tip-icon {
    color: var(--text-secondary);
    background: rgba(139, 92, 246, 0.1);
}

.ui-hint-tip-bubble {
    position: absolute;
    z-index: 60;
    left: auto;
    right: 0;
    bottom: calc(100% + 8px);
    min-width: 11rem;
    max-width: 18rem;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    background: rgba(22, 22, 34, 0.98);
    border: 1px solid rgba(139, 92, 246, 0.35);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(139, 92, 246, 0.08);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    font-size: 0.72rem;
    line-height: 1.45;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: left;
    white-space: normal;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
}

.ui-hint-tip--bottom .ui-hint-tip-bubble {
    bottom: auto;
    top: calc(100% + 8px);
    transform: translateY(-4px);
}

.ui-hint-tip-bubble--info {
    border-color: rgba(96, 165, 250, 0.35);
}

.ui-hint-tip-bubble--warning {
    color: #fcd34d;
    border-color: rgba(251, 191, 36, 0.4);
}

.ui-hint-tip-bubble--success {
    color: #86efac;
    border-color: rgba(74, 222, 128, 0.35);
}

.ui-hint-tip-bubble::after {
    content: '';
    position: absolute;
    right: 14px;
    bottom: -5px;
    width: 10px;
    height: 10px;
    background: rgba(22, 22, 34, 0.98);
    border-right: 1px solid rgba(139, 92, 246, 0.35);
    border-bottom: 1px solid rgba(139, 92, 246, 0.35);
    transform: rotate(45deg);
}

.ui-hint-tip--bottom .ui-hint-tip-bubble::after {
    bottom: auto;
    top: -5px;
    border-right: none;
    border-bottom: none;
    border-left: 1px solid rgba(139, 92, 246, 0.35);
    border-top: 1px solid rgba(139, 92, 246, 0.35);
}

.ui-hint-tip--block {
    display: block;
    width: 100%;
}

.ui-hint-tip--icon {
    display: inline-flex;
    vertical-align: middle;
}

.ui-hint-tip--icon > .icon-btn,
.ui-hint-tip--icon > .locale-settings-btn,
.ui-hint-tip--icon > .sb-logout-btn,
.ui-hint-tip--icon > button {
    position: relative;
    z-index: 0;
}

.ui-hint-tip:hover .ui-hint-tip-bubble,
.ui-hint-tip:focus-within .ui-hint-tip-bubble {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}