/* =========================================
   UMBRAIX AI — TRANSLATOR STYLE v2026
   Matches the unified design system.
   ========================================= */

:root {
    --brand-primary: oklch(48% 0.18 268);
    --brand-hover:   oklch(42% 0.20 268);
    --brand-active:  oklch(38% 0.22 268);
    --brand-surface: oklch(96% 0.03 268);
    --color-success: oklch(52% 0.16 148);
    --color-warning: oklch(62% 0.18 85);
    --color-error:   oklch(54% 0.20 25);
    --primary-bg:    oklch(99.5% 0.002 270);
    --surface-0:     #ffffff;
    --surface-1:     #f8f9fb;
    --surface-2:     #f1f3f6;
    --surface-3:     #e8ebf0;
    --surface-input: #f4f5f8;
    --bg-panel:      #ffffff;
    --text-main:      oklch(12% 0.02 270);
    --text-secondary: oklch(28% 0.02 270);
    --text-muted:     oklch(46% 0.02 270);
    --text-dim:       oklch(60% 0.015 270);
    --text-disabled:  oklch(72% 0.01 270);
    --font-display: 'Space Grotesk', -apple-system, sans-serif;
    --font-body:    'Manrope', -apple-system, sans-serif;
    --font-code:    'Cascadia Code', monospace;
    --border-subtle: #e5e8ed;
    --border-medium: #d8dce4;
    --border-strong: #c6ccd6;
    --border-focus:  var(--brand-primary);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-sm: 0 2px 6px rgba(0,0,0,0.07);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.09);
    --radius-xs:   0.375rem;
    --radius-sm:   0.75rem;
    --radius-md:   1rem;
    --radius-lg:   1.25rem;
    --radius-pill: 9999px;
    --transition-fast: 120ms;
    --transition-base: 220ms;
    --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
    --container-md: 1000px;
}

[data-theme="dark"] {
    --brand-primary: oklch(68% 0.20 265);
    --brand-hover:   oklch(74% 0.21 265);
    --brand-active:  oklch(62% 0.22 265);
    --brand-surface: oklch(20% 0.06 265);
    --color-success: oklch(68% 0.20 148);
    --color-warning: oklch(78% 0.18 88);
    --color-error:   oklch(64% 0.22 25);
    --primary-bg:  oklch(13% 0.014 272);
    --surface-0:   oklch(13% 0.014 272);
    --surface-1:   oklch(17% 0.016 272);
    --surface-2:   oklch(21% 0.018 272);
    --surface-3:   oklch(25% 0.020 272);
    --surface-input: oklch(16% 0.014 272);
    --bg-panel:    oklch(17% 0.016 272);
    --text-main:      oklch(96% 0.01 265);
    --text-secondary: oklch(88% 0.02 265);
    --text-muted:     oklch(70% 0.025 265);
    --text-dim:       oklch(54% 0.02 265);
    --text-disabled:  oklch(40% 0.015 265);
    --border-subtle: oklch(24% 0.018 272);
    --border-medium: oklch(28% 0.020 272);
    --border-strong: oklch(34% 0.022 272);
}

[data-theme="void"] {
    --brand-primary: oklch(72% 0.22 265);
    --brand-hover:   oklch(78% 0.23 265);
    --brand-active:  oklch(66% 0.24 265);
    --brand-surface: oklch(15% 0.08 265);
    --color-success: oklch(70% 0.22 148);
    --color-warning: oklch(80% 0.20 88);
    --color-error:   oklch(66% 0.24 25);
    --primary-bg:  #000;
    --surface-0:   #000;
    --surface-1:   #0d0d0d;
    --surface-2:   #161616;
    --surface-3:   #202020;
    --surface-input: #0a0a0a;
    --bg-panel:    #0d0d0d;
    --text-main:      #f5f5f5;
    --text-secondary: #d0d0d0;
    --text-muted:     #888;
    --text-dim:       #555;
    --text-disabled:  #383838;
    --border-subtle: #1e1e1e;
    --border-medium: #282828;
    --border-strong: #333;
}

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font-body);
    background: var(--primary-bg);
    color: var(--text-main);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    display: flex; flex-direction: column;
}

/* =========================================
   FLOATING HEADER — Standardized
   ========================================= */
.translate-floating-header {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: var(--container-md);
    z-index: 200;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0;
    height: 3rem;
    pointer-events: none;
}

.translate-back-btn {
    pointer-events: auto;
    width: 2.85rem;
    height: 2.85rem;
    border-radius: 50%;
    border: 1px solid var(--border-subtle);
    background: var(--surface-0);
    color: var(--text-main);
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.translate-back-btn:hover {
    background: var(--surface-2);
    color: var(--brand-primary);
    border-color: var(--border-medium);
    transform: translateX(-2px);
    box-shadow: var(--shadow-md);
}

.translate-header-title {
    pointer-events: none;
    background: var(--surface-0);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-pill);
    padding: 0 1.25rem;
    height: 2.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.translate-header-title span {
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-main);
}

/* =========================================
   MAIN LAYOUT
   ========================================= */
.app-main {
    flex: 1; display: flex; flex-direction: column;
    padding: 6.5rem 1.5rem 4rem;
    gap: 1.25rem;
    max-width: var(--container-md);
    margin: 0 auto; width: 100%;
}

/* =========================================
   KEY WARNING CARD
   ========================================= */
.key-warning-card {
    background: oklch(98% 0.01 25);
    border: 1px solid oklch(90% 0.05 25);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0.5rem;
    corner-shape: squircle;
    animation: fadeInDown 0.4s var(--ease-out);
}
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
.kw-icon {
    width: 3rem;
    height: 3rem;
    background: oklch(95% 0.08 25);
    color: var(--color-error);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    corner-shape: squircle;
}
.kw-content { flex: 1; }
.kw-content strong {
    display: block;
    font-family: var(--font-display);
    font-size: 1rem;
    color: oklch(25% 0.02 25);
    margin-bottom: 0.25rem;
}
.kw-content p {
    font-size: 0.88rem;
    color: oklch(45% 0.02 25);
    line-height: 1.4;
}

[data-theme="dark"] .key-warning-card,
[data-theme="void"] .key-warning-card {
    background: oklch(20% 0.04 25);
    border-color: oklch(30% 0.08 25);
}
[data-theme="dark"] .kw-content strong,
[data-theme="void"] .kw-content strong {
    color: oklch(90% 0.02 25);
}
[data-theme="dark"] .kw-content p,
[data-theme="void"] .kw-content p {
    color: oklch(75% 0.02 25);
}
.kw-btn {
    background: var(--brand-primary);
    color: white;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 0.88rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
}
.kw-btn:hover {
    background: var(--brand-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* =========================================
   SETTINGS GRID
   ========================================= */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    background: var(--surface-0);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    corner-shape: squircle;
}
.sg { display: flex; flex-direction: column; gap: 0.45rem; }
.sg > label {
    font-family: var(--font-display); font-size: 0.72rem; font-weight: 700;
    color: var(--text-dim); letter-spacing: 0.05em; text-transform: uppercase;
}
/* CUSTOM SELECT */
.custom-select {
    position: relative;
    width: 100%;
    user-select: none;
}
.select-trigger {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 500;
    background: var(--surface-1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-main);
    padding: 0.65rem 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-fast);
}
.custom-select.active .select-trigger {
    border-color: var(--border-focus);
    background: var(--surface-0);
    box-shadow: 0 0 0 3px oklch(from var(--brand-primary) l c h / 0.1);
}
.select-trigger i {
    font-size: 0.75rem;
    color: var(--text-dim);
    transition: transform var(--transition-base);
}
.custom-select.active .select-trigger i {
    transform: rotate(180deg);
}

.select-options {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--surface-0);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base) var(--ease-out);
    max-height: 250px;
    overflow-y: auto;
    padding: 0.4rem;
}
.custom-select.active .select-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.option {
    padding: 0.6rem 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.option:hover {
    background: var(--surface-2);
    color: var(--text-main);
}
.option.selected {
    background: var(--brand-surface);
    color: var(--brand-primary);
    font-weight: 600;
}

/* Scrollbar for select options */
.select-options::-webkit-scrollbar { width: 4px; }
.select-options::-webkit-scrollbar-track { background: transparent; }
.select-options::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; }
.ctrl-row {
    display: flex; align-items: center; gap: 0.75rem;
    background: var(--surface-1); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md); padding: 0.6rem 0.85rem; min-height: 42px;
}
.ctrl-row input[type="range"] { flex: 1; accent-color: var(--brand-primary); cursor: pointer; }
.ctrl-val { font-family: var(--font-code); font-size: 0.85rem; color: var(--text-secondary); min-width: 20px; text-align: right; }
.ctrl-row span { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.switch { position: relative; display: inline-block; width: 34px; height: 18px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; inset: 0; background: var(--border-medium);
    border-radius: var(--radius-pill); cursor: pointer;
    transition: background var(--transition-fast);
}
.slider::before {
    content: ''; position: absolute; width: 12px; height: 12px;
    left: 3px; top: 3px; background: white; border-radius: 50%;
    transition: transform var(--transition-fast);
}
.switch input:checked + .slider { background: var(--brand-primary); }
.switch input:checked + .slider::before { transform: translateX(16px); }

/* =========================================
   ACTION ROW
   ========================================= */
.action-row {
    display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
}
.btn {
    font-family: var(--font-display); font-size: 0.88rem; font-weight: 700;
    border-radius: var(--radius-md); padding: 0.75rem 1.25rem;
    cursor: pointer; border: none;
    transition: all var(--transition-fast) var(--ease-out);
    display: flex; align-items: center; gap: 0.5rem;
    letter-spacing: -0.01em; white-space: nowrap;
}
.btn-primary { background: var(--brand-primary); color: #fff; box-shadow: var(--shadow-brand); }
.btn-primary:hover:not(:disabled) { background: var(--brand-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.btn-primary:active:not(:disabled) { background: var(--brand-active); transform: none; }
.btn-primary:disabled { opacity: 0.40; cursor: not-allowed; }

.btn-sec { background: var(--surface-1); color: var(--text-secondary); border: 1px solid var(--border-subtle); }
.btn-sec:hover:not(:disabled) { background: var(--surface-2); border-color: var(--border-medium); color: var(--text-main); }
.btn-sec:disabled { opacity: 0.36; cursor: not-allowed; }

.btn-danger { background: oklch(98% 0.02 25); color: var(--color-error); border: 1px solid oklch(88% 0.08 25); }
.btn-danger:hover:not(:disabled) { background: oklch(95% 0.05 25); border-color: var(--color-error); }
.btn-danger:disabled { opacity: 0.36; cursor: not-allowed; }

.file-lbl {
    font-family: var(--font-display); font-size: 0.88rem; font-weight: 700;
    border-radius: var(--radius-md); padding: 0.75rem 1.25rem;
    cursor: pointer; background: var(--surface-1); color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    display: flex; align-items: center; gap: 0.5rem;
    transition: all var(--transition-fast); white-space: nowrap;
}
.file-lbl:hover { background: var(--surface-2); border-color: var(--border-medium); color: var(--text-main); }
input[type="file"] { display: none; }
.a-spacer { flex: 1; min-width: 0; }

/* =========================================
   PROGRESS SECTION
   ========================================= */
.progress-section {
    background: var(--surface-0); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg); padding: 1.25rem;
    box-shadow: var(--shadow-sm); display: none;
    corner-shape: squircle;
}
.progress-section.visible { display: block; }
.prog-top {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 0.75rem; gap: 0.75rem; flex-wrap: wrap;
}
.prog-label {
    font-family: var(--font-display); font-size: 0.9rem; font-weight: 700;
    color: var(--text-main); display: flex; align-items: center; gap: 0.6rem;
}
.spinner {
    width: 16px; height: 16px;
    border: 2px solid var(--border-medium); border-top-color: var(--brand-primary);
    border-radius: 50%; animation: spin 0.65s linear infinite; flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.prog-track {
    height: 8px; background: var(--surface-2);
    border-radius: var(--radius-pill); overflow: hidden; margin-bottom: 0.75rem;
}
.prog-fill {
    height: 100%; border-radius: var(--radius-pill);
    background: var(--brand-primary);
    transition: width 0.28s var(--ease-out); width: 0%;
}
.prog-fill.done  { background: var(--color-success); }
.prog-fill.mixed { background: linear-gradient(90deg, var(--color-success), var(--color-warning)); }
.prog-stats {
    display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
    font-family: var(--font-code); font-size: 0.8rem; color: var(--text-muted);
}
.ps { display: flex; align-items: center; gap: 0.35rem; }
.psdot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.psdot-ok   { background: var(--color-success); }
.psdot-err  { background: var(--color-error); }
.psdot-wait { background: var(--color-warning); animation: pulse 1s ease-in-out infinite; }
.prog-eta { margin-left: auto; font-family: var(--font-code); font-size: 0.78rem; color: var(--text-dim); }
.retry-badge {
    font-size: 0.75rem; color: var(--color-warning); font-family: var(--font-code);
    padding: 0.25rem 0.65rem;
    background: oklch(98.5% 0.02 85);
    border-radius: var(--radius-xs);
    border: 1px solid oklch(90% 0.08 85);
    display: none; align-items: center; gap: 0.35rem;
}
.retry-badge.show { display: inline-flex; }

/* =========================================
   TRANSLATE PANES
   ========================================= */
.translate-area {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
}
.pane {
    display: flex; flex-direction: column;
    background: var(--surface-0); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden;
    corner-shape: squircle;
}
.pane-hdr {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.75rem 1.25rem; background: var(--surface-1);
    border-bottom: 1px solid var(--border-subtle); flex-shrink: 0;
    gap: 0.75rem; flex-wrap: wrap;
}
.pane-title {
    font-family: var(--font-display); font-size: 0.75rem; font-weight: 700;
    color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase;
}
.pane-meta { font-family: var(--font-code); font-size: 0.75rem; color: var(--text-dim); }
.pane-acts { display: flex; gap: 0.45rem; align-items: center; flex-wrap: wrap; }
.pbtn {
    font-family: var(--font-display); font-size: 0.75rem; font-weight: 700;
    color: var(--text-secondary); background: var(--surface-2);
    border: 1px solid var(--border-subtle); border-radius: 0.5rem;
    padding: 0.35rem 0.75rem; cursor: pointer;
    transition: all var(--transition-fast);
    display: flex; align-items: center; gap: 0.35rem;
}
.pbtn:hover { background: var(--surface-3); color: var(--text-main); border-color: var(--border-medium); }
.pbtn.danger:hover { background: oklch(95% 0.05 25); color: var(--color-error); border-color: var(--color-error); }
.pbtn.ok { color: var(--color-success); border-color: var(--color-success); }
.pane-ta {
    flex: 1; font-family: var(--font-body); font-size: 0.95rem; line-height: 1.6;
    background: var(--surface-0); border: none; color: var(--text-main);
    padding: 1.25rem; resize: none; outline: none; min-height: 380px; width: 100%;
    caret-color: var(--brand-primary);
}
.pane-ta::placeholder { color: var(--text-disabled); font-family: var(--font-body); }
.pane-ta:focus { background: var(--surface-0); }
.pane-ta[readonly] { cursor: default; }
.fail-notice {
    padding: 0.75rem 1.25rem;
    background: oklch(98% 0.02 25);
    border-top: 1px solid oklch(88% 0.08 25);
    font-size: 0.85rem; color: var(--color-error); font-family: var(--font-body);
    font-weight: 500; display: none; line-height: 1.6;
}
.fail-notice.show { display: block; }

/* =========================================
   STATUS BAR
   ========================================= */
.status-bar {
    background: var(--surface-0); border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md); padding: 0.6rem 1rem;
    font-family: var(--font-code); font-size: 0.78rem; color: var(--text-dim);
    display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; min-height: 42px;
    box-shadow: var(--shadow-sm);
    corner-shape: squircle;
}
.sdot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; background: var(--text-disabled); transition: background var(--transition-fast); }
.sdot.ok   { background: var(--color-success); }
.sdot.err  { background: var(--color-error); }
.sdot.warn { background: var(--color-warning); }
.sdot.busy { background: var(--color-warning); animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.35} }
.smsg { flex: 1; color: var(--text-muted); font-weight: 600; }
.smsg.err  { color: var(--color-error); }
.smsg.warn { color: var(--color-warning); }
.smsg.ok   { color: var(--color-success); }
.sinfo { margin-left: auto; font-size: 0.75rem; color: var(--text-disabled); white-space: nowrap; font-family: var(--font-display); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;}

/* =========================================
   RESPONSIVE — TABLET ≤900px
   ========================================= */
@media (max-width: 900px) {
    .translate-area { grid-template-columns: 1fr; }
    .pane-ta { min-height: 280px; }
    .settings-grid { grid-template-columns: repeat(3,1fr); }
    .translate-floating-header { width: 95%; }
}

/* =========================================
   RESPONSIVE — MOBILE ≤600px
   ========================================= */
@media (max-width: 600px) {
    .app-main { padding: 5.5rem 1rem 3rem; gap: 1rem; }
    .translate-header-title span { font-size: 0.75rem; letter-spacing: 0.04em; }
    .brand-badge { display: none; }
    .settings-grid { grid-template-columns: 1fr 1fr; padding: 1rem; }
    .api-key-bar { padding: 1rem; gap: 0.75rem; }
    .api-key-input-wrap { min-width: 150px; }
    .action-row { gap: 0.5rem; }
    .btn, .file-lbl { padding: 0.65rem 1rem; font-size: 0.82rem; }
    .a-spacer { display: none; }
    .pane-hdr { padding: 0.65rem 1rem; }
    .pane-ta { padding: 1rem; font-size: 0.88rem; min-height: 220px; }
    .sinfo { display: none; }
    .progress-section { padding: 1rem; }
    .prog-stats { gap: 0.75rem; }
}

/* =========================================
   RESPONSIVE — SMALL ≤420px
   ========================================= */
@media (max-width: 420px) {
    .settings-grid { grid-template-columns: 1fr 1fr; }
    .btn, .file-lbl { padding: 0.6rem 0.85rem; font-size: 0.78rem; }
}