/* ──────────────────────────────────────────────────────────────
   Settings — modal panels, form controls, custom selects, toggles
   Aimed at premium feel: glass blur, refined focus rings, soft motion
   ────────────────────────────────────────────────────────────── */

/* Shared backdrop rules — duplicated for both settings + chat-settings.
   Keeping them separate so toggling them globally stays predictable. */
.settings-backdrop,
.chat-settings-backdrop {
    position: fixed; inset: 0; z-index: 49;
    background: rgba(0,0,0,0);
    backdrop-filter: blur(0px); -webkit-backdrop-filter: blur(0px);
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity var(--duration-exit) var(--ease-in-expo),
                background-color var(--duration-exit) var(--ease-in-expo),
                backdrop-filter var(--duration-exit) var(--ease-in-expo),
                -webkit-backdrop-filter var(--duration-exit) var(--ease-in-expo),
                visibility var(--duration-exit);
}
.settings-backdrop.show,
.chat-settings-backdrop.show {
    opacity: 1; visibility: visible; pointer-events: auto;
    background: var(--backdrop-modal);
    backdrop-filter: blur(8px) saturate(140%);
    -webkit-backdrop-filter: blur(8px) saturate(140%);
    transition: opacity var(--duration-enter) var(--ease-out-expo),
                background-color var(--duration-enter) var(--ease-out-expo),
                backdrop-filter var(--duration-enter) var(--ease-out-expo),
                -webkit-backdrop-filter var(--duration-enter) var(--ease-out-expo),
                visibility var(--duration-enter);
}

/* Shared modal panel geometry */
.settings-panel,
.chat-settings-panel {
    position: fixed; top: 24px; left: 24px; right: 24px; bottom: 24px;
    display: flex; flex-direction: column; gap: 0; padding: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 22px;
    overflow-y: auto;
    opacity: 0; transform: translateY(14px) scale(0.975);
    will-change: transform, opacity;
    transition: opacity var(--duration-exit) var(--ease-in-expo),
                transform var(--duration-exit) var(--ease-in-expo),
                visibility var(--duration-exit);
    visibility: hidden; pointer-events: none;
    z-index: 50;
    box-shadow: var(--shadow-strong), var(--overlay-hairline);
    width: auto; height: auto; margin: 0;
}
.settings-panel { z-index: 50; }
.chat-settings-panel { z-index: 60; }

.settings-panel.show,
.chat-settings-panel.show {
    opacity: 1; transform: translateY(0) scale(1);
    visibility: visible; pointer-events: auto;
    transition: opacity var(--duration-enter) var(--ease-out-expo),
                transform var(--duration-enter) var(--ease-out-expo),
                visibility var(--duration-enter);
}
.settings-section:last-child,
.chat-settings-panel .settings-section:last-child { margin-bottom: 28px; }

/* ── Range sliders (chat settings) ── */
.chat-settings-panel .range-wrapper { padding: 8px 0 2px; }
.chat-settings-panel input[type="range"] {
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 4px;
    background: var(--border-mid);
    border-radius: 999px;
    outline: none; cursor: pointer;
    transition: background var(--duration-micro) var(--ease-standard);
}
.chat-settings-panel input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 18px; height: 18px;
    border-radius: 999px; background: var(--surface-1);
    cursor: pointer; border: 1px solid var(--accent-color);
    box-shadow: 0 2px 6px rgba(0,0,0,0.18);
    transition: transform var(--duration-micro) var(--ease-standard), box-shadow var(--duration-micro) var(--ease-standard);
}
.chat-settings-panel input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); box-shadow: 0 4px 10px rgba(0,0,0,0.22); }
.chat-settings-panel input[type="range"]::-webkit-slider-thumb:active { transform: scale(0.94); transition-duration: var(--duration-press); }
.chat-settings-panel input[type="range"]::-moz-range-thumb {
    width: 18px; height: 18px;
    border-radius: 999px; background: var(--surface-1);
    cursor: pointer; border: 1px solid var(--accent-color);
    box-shadow: 0 2px 6px rgba(0,0,0,0.18);
}

/* ── Sticky header with eyebrow + title + close ── */
.settings-panel-header {
    position: sticky; top: 0; z-index: 2;
    display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
    padding: 26px 32px 14px;
    background: linear-gradient(180deg, var(--glass-bg) 0%, var(--glass-bg) 60%, transparent 100%);
    backdrop-filter: blur(28px) saturate(180%); -webkit-backdrop-filter: blur(28px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 20px;
}
.settings-eyebrow {
    display: block;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 10.5px; font-weight: 600;
    letter-spacing: 2.4px; text-transform: uppercase;
    margin-bottom: 6px;
}
.settings-panel-header h2 {
    font-family: var(--font-display);
    font-size: 32px; line-height: 1; letter-spacing: -1px;
    font-weight: 700;
    color: var(--text-primary);
}
.settings-close-btn {
    width: 38px; height: 38px;
    border: 1px solid var(--border-mid);
    border-radius: 999px;
    background: var(--surface-1);
    cursor: pointer;
    transition: var(--transition-interactive);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-soft);
}
.settings-close-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: rotate(90deg);
    box-shadow: var(--shadow-mid);
}
.settings-close-btn:active { transform: rotate(90deg) scale(0.92); transition-duration: var(--duration-press); }
.settings-close-btn svg { width: 17px; height: 17px; fill: var(--text-primary); transition: fill var(--duration-micro) var(--ease-standard); }
.settings-close-btn:hover svg { fill: var(--accent-text); }

/* ── Section card — glass over glass, subtle elevation ── */
.settings-section {
    background: var(--surface-2);
    border: 1px solid var(--border-soft);
    border-radius: 18px;
    padding: 18px;
    display: flex; flex-direction: column;
    gap: 14px;
    margin: 0 32px 16px;
    box-shadow: 0 1px 0 var(--surface-1) inset, var(--shadow-soft);
    transition: border-color var(--duration-micro) var(--ease-standard), box-shadow var(--duration-micro) var(--ease-standard);
}
.settings-section:hover { border-color: var(--border-mid); }
.settings-section-title {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.2px;
    color: var(--text-primary);
    display: flex; align-items: center; gap: 8px;
}
.settings-section-title::before {
    content: '';
    width: 4px; height: 14px;
    border-radius: 2px;
    background: var(--accent-color);
    flex-shrink: 0;
}
.settings-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.settings-group { display: flex; flex-direction: column; gap: 6px; }
.settings-group label {
    display: block;
    font-size: 11.5px;
    color: var(--text-tertiary);
    font-weight: 700;
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.7px;
}

.settings-group input,
.settings-group textarea {
    width: 100%;
    padding: 11px 13px;
    border: 1px solid var(--border-mid);
    border-radius: 12px;
    background: var(--surface-1);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: var(--transition-interactive);
    font-family: var(--font-body);
    box-shadow: 0 1px 0 var(--surface-1) inset;
}
.settings-group textarea {
    resize: vertical;
    min-height: 98px;
    line-height: 1.55;
}
.settings-group input:hover,
.settings-group textarea:hover { border-color: var(--text-tertiary); }
.settings-group input:focus,
.settings-group textarea:focus {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-input-focus);
}
::placeholder { color: var(--text-muted); }

.native-select { display: none; }

/* ── Custom select dropdown — animated open with staggered options ── */
.custom-select { position: relative; width: 100%; }
.custom-select-trigger {
    width: 100%;
    min-height: 42px;
    padding: 11px 13px;
    border: 1px solid var(--border-mid);
    border-radius: 12px;
    background: var(--surface-1);
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    color: var(--text-primary);
    font: inherit; font-size: 13px;
    text-align: left;
    transition: var(--transition-interactive);
    box-shadow: 0 1px 0 var(--surface-1) inset;
}
.custom-select-trigger span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.custom-select-trigger svg {
    width: 18px; height: 18px;
    fill: var(--text-tertiary);
    flex-shrink: 0;
    transition: transform var(--duration-enter) var(--ease-out-expo), fill var(--duration-micro) var(--ease-standard);
}
.custom-select-trigger:hover { border-color: var(--text-tertiary); }
.custom-select.open .custom-select-trigger {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-input-focus);
}
.custom-select.open .custom-select-trigger svg { transform: rotate(180deg); fill: var(--accent-color); }

.custom-select-menu {
    position: absolute; left: 0; right: 0; top: calc(100% + 6px);
    max-height: 240px; overflow-y: auto;
    padding: 6px;
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%); -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    box-shadow: var(--shadow-strong), var(--overlay-hairline);
    opacity: 0; visibility: hidden;
    transform: translateY(-6px) scale(0.98);
    transform-origin: top;
    transition: opacity var(--duration-enter) var(--ease-out-expo),
                transform var(--duration-enter) var(--ease-out-expo),
                visibility var(--duration-enter);
    z-index: 40;
}
.custom-select.open .custom-select-menu {
    opacity: 1; visibility: visible;
    transform: translateY(0) scale(1);
}
.custom-select-option {
    width: 100%; border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    display: block;
    font: inherit; font-size: 13px;
    padding: 10px 11px;
    text-align: left;
    transition: background var(--duration-micro) var(--ease-standard), color var(--duration-micro) var(--ease-standard);
}
.custom-select-option:hover,
.custom-select-option.highlighted { background: var(--surface-hover); }
.custom-select-option.active { background: var(--accent-color); color: var(--accent-text); font-weight: 600; }
.custom-select-option.active.highlighted { background: var(--accent-hover); }
.custom-select-option:focus-visible { outline: 2px solid var(--accent-color); outline-offset: -2px; border-radius: 10px; }

/* ── Outline button (used for "fetch models") ── */
.btn-outline {
    position: relative;
    width: 100%; padding: 11px;
    font-size: 12px; font-weight: 700; letter-spacing: 0.2px;
    border: 1px solid var(--accent-color);
    border-radius: 12px;
    background: transparent;
    cursor: pointer;
    transition: var(--transition-interactive);
    color: var(--accent-color);
    overflow: hidden;
}
.btn-outline::before {
    content: '';
    position: absolute; inset: 0;
    background: var(--accent-color);
    transform: scaleY(0); transform-origin: bottom;
    transition: transform var(--duration-enter) var(--ease-out-expo);
    z-index: -1;
}
.btn-outline:hover { color: var(--accent-text); }
.btn-outline:hover::before { transform: scaleY(1); }
.btn-outline:active { transform: scale(0.97); transition-duration: var(--duration-press); }

/* ── Secondary data action buttons (export / import) ── */
.data-actions { display: flex; gap: 8px; margin-top: 5px; }
.data-actions button {
    flex: 1; padding: 9px;
    font-size: 12px; font-weight: 600;
    border: 1px solid var(--border-mid);
    border-radius: var(--radius-md);
    background: var(--surface-1);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-interactive);
    box-shadow: var(--shadow-soft);
}
.data-actions button:hover { background: var(--surface-hover); border-color: var(--text-secondary); transform: translateY(-1px); box-shadow: var(--shadow-mid); }
.data-actions button:active { transform: scale(0.97); transition-duration: var(--duration-press); }

/* ── Toggle switch — polished, with active accent glow ── */
.toggle-container {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}
.toggle-container input[type="checkbox"] { display: none; }
.toggle-container .toggle-label {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 16px;
    cursor: pointer;
    user-select: none;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-primary);
}
.toggle-container .toggle-text { flex: 1; }
.toggle-container .toggle-switch {
    position: relative;
    flex-shrink: 0;
    width: 42px;
    height: 24px;
    border-radius: 999px;
    background: var(--border-mid);
    transition: background var(--duration-enter) var(--ease-out-expo), box-shadow var(--duration-micro) var(--ease-standard);
}
.toggle-container .toggle-switch::after {
    content: '';
    position: absolute;
    top: 2px; left: 2px;
    width: 20px; height: 20px;
    border-radius: 999px;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.25);
    transition: transform var(--duration-enter) var(--ease-out-expo);
}
.toggle-container .toggle-label:hover .toggle-switch { box-shadow: var(--ring-focus); }
.toggle-container input[type="checkbox"]:checked + .toggle-label .toggle-switch {
    background: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-faint);
}
.toggle-container input[type="checkbox"]:checked + .toggle-label .toggle-switch::after {
    transform: translateX(18px);
}