/**
 * native-support.css
 * Styles for the Native Language Support feature.
 * Loaded on every page via _scripts.html (lightweight).
 * 
 * Sections:
 *   1. Sidebar language section
 *   2. Language pills
 *   3. Timer / status
 *   4. Dictionary card translation injection
 *   5. Unlock modal
 *   6. Animations
 */

/* ══════════════════════════════════════════════════════════════
   1. Sidebar — Native Language Section
   ══════════════════════════════════════════════════════════════ */

#sb-native-section {
    padding: 0 12px 16px;
}

/* Toggle header row */
.sb-native-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 4px 6px;
    gap: 8px;
}

.sb-native-header__label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
    flex: 1;
}

/* iOS-style toggle switch */
.sb-toggle {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.sb-toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

.sb-toggle__track {
    display: flex;
    align-items: center;
    width: 36px;
    height: 20px;
    border-radius: 999px;
    background: var(--border);
    transition: background 0.25s ease;
    padding: 2px;
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.25);
}

.sb-toggle input:checked + .sb-toggle__track {
    background: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), inset 0 1px 3px rgba(0,0,0,0.15);
}

.sb-toggle__thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0,0,0,0.3);
    transition: transform 0.22s cubic-bezier(0.34,1.4,0.64,1);
    position: absolute;
    left: 2px;
}

.sb-toggle input:checked + .sb-toggle__track .sb-toggle__thumb {
    transform: translateX(16px);
}

/* Expandable body — smooth reveal */
#sb-native-body {
    animation: ns-fadein 0.2s ease;
}

/* ══════════════════════════════════════════════════════════════
   2. Slider toggle (pure — no checkbox tick ever shown)
   ══════════════════════════════════════════════════════════════ */

/* iOS-style slider */
.sb-slider {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.sb-slider input {
    /* Fully hidden — never shows tick or check */
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
    clip: rect(0 0 0 0);
    overflow: hidden;
}

.sb-slider__track {
    position: relative;
    display: block;
    width: 38px;
    height: 22px;
    border-radius: 999px;
    background: var(--border);
    transition: background 0.22s ease, box-shadow 0.22s ease;
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.3);
}

.sb-slider input:checked + .sb-slider__track {
    background: var(--accent);
    box-shadow: 0 0 0 2px rgba(0,210,200,0.25), inset 0 1px 4px rgba(0,0,0,0.15);
}

.sb-slider__thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.35);
    transition: left 0.22s cubic-bezier(0.34, 1.4, 0.64, 1);
}

.sb-slider input:checked + .sb-slider__track .sb-slider__thumb {
    left: 19px;
}

/* ══════════════════════════════════════════════════════════════
   3. Current language display (when toggle is ON)
   ══════════════════════════════════════════════════════════════ */

.sb-native-current {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 6px 4px;
    min-height: 32px;
}

.sb-native-current__flag {
    font-size: 1.3rem;
    line-height: 1;
    flex-shrink: 0;
}

.sb-native-current__name {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    flex: 1;
}

.sb-native-current__changes {
    font-size: 0.7rem;
    color: var(--text-dim);
    background: var(--border);
    padding: 2px 6px;
    border-radius: 99px;
    white-space: nowrap;
    flex-shrink: 0;
}

.sb-native-current__changes--low {
    color: #f97316;
    background: rgba(249,115,22,0.12);
}

.sb-native-current__changes--none {
    color: #ef4444;
    background: rgba(239,68,68,0.12);
}

/* Change language button */
.sb-native-change-btn {
    width: 100%;
    margin: 6px 0 4px;
    padding: 7px 12px;
    border-radius: 8px;
    border: 1.5px solid var(--accent);
    background: rgba(0,210,200,0.06);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.18s;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.sb-native-change-btn:hover {
    background: rgba(0,210,200,0.14);
    transform: translateY(-1px);
}

.sb-native-change-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
    border-color: var(--border);
    color: var(--text-dim);
}

/* ══════════════════════════════════════════════════════════════
   4. Language Picker Popup (small floating card)
   ══════════════════════════════════════════════════════════════ */

.ns-lang-picker {
    position: fixed;
    z-index: 1500;
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: 14px;
    padding: 14px 14px 12px;
    width: 240px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.45);
    animation: ns-fadein 0.18s ease;
}

.ns-lang-picker__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.ns-lang-picker__title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.ns-lang-picker__close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 2px 5px;
    border-radius: 5px;
    transition: background 0.15s;
}

.ns-lang-picker__close:hover {
    background: var(--border);
    color: var(--text);
}

.ns-lang-picker__quota {
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-bottom: 10px;
    padding: 4px 8px;
    background: var(--surface-light, rgba(255,255,255,0.04));
    border-radius: 6px;
    text-align: center;
}

.ns-lang-picker__quota--warn {
    color: #f97316;
    background: rgba(249,115,22,0.08);
}

.ns-lang-picker__quota--error {
    color: #ef4444;
    background: rgba(239,68,68,0.08);
}

.ns-lang-picker__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.ns-lang-picker__grid::-webkit-scrollbar { width: 3px; }
.ns-lang-picker__grid::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.ns-picker-pill {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 7px 9px;
    border-radius: 8px;
    border: 1.5px solid var(--border);
    background: var(--surface-light, rgba(255,255,255,0.03));
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text);
    transition: all 0.16s;
    white-space: nowrap;
    overflow: hidden;
}

.ns-picker-pill:hover:not(.ns-picker-pill--coming):not(.ns-picker-pill--active) {
    border-color: var(--accent);
    background: rgba(0,210,200,0.08);
}

.ns-picker-pill--active {
    border-color: var(--accent);
    background: rgba(0,210,200,0.12);
    color: var(--accent);
    font-weight: 700;
    pointer-events: none;
}

.ns-picker-pill--coming {
    opacity: 0.38;
    cursor: default;
    border-style: dashed;
    pointer-events: none;
}

.ns-picker-pill__flag { font-size: 1rem; flex-shrink: 0; }
.ns-picker-pill__name { overflow: hidden; text-overflow: ellipsis; }

/* Expandable body smooth reveal */
#sb-native-body {
    animation: ns-fadein 0.2s ease;
}


.sb-native-status {
    margin-top: 10px;
    min-height: 22px;
    font-size: 0.8rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 6px;
}

.sb-native-timer {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    transition: color 0.4s;
}

.sb-native-timer--green  { color: #22c55e; }
.sb-native-timer--orange { color: #f97316; }
.sb-native-timer--red    { color: #ef4444; animation: ns-pulse 1.2s ease-in-out infinite; }

/* CTA button inside sidebar */
.sb-native-btn {
    margin-top: 10px;
    width: 100%;
    font-size: 0.82rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm, 8px);
    font-weight: 700;
    letter-spacing: 0.02em;
    transition: transform 0.15s, box-shadow 0.15s;
}

.sb-native-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0,210,200,0.25);
}

.sb-native-btn--trial {
    background: linear-gradient(135deg, var(--accent), #0ea5e9);
    color: #000;
    border: none;
}

.sb-native-btn--gem {
    background: linear-gradient(135deg, #7c3aed, #a855f7);
    color: #fff;
    border: none;
}

.sb-native-btn--ads {
    background: var(--surface-light);
    color: var(--text);
    border: 1.5px solid var(--border);
}

.sb-native-dual-btns {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.sb-native-dual-btns .sb-native-btn {
    margin-top: 0;
    flex: 1;
}

/* ══════════════════════════════════════════════════════════════
   4. Dictionary Card — Inline Translation
   ══════════════════════════════════════════════════════════════ */

/* Word translation below the headline English word */
.native-word-trans {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.92em;
    font-style: italic;
    color: var(--text-dim);
    margin-left: 8px;
    vertical-align: middle;
    animation: ns-fadein 0.3s ease;
}

.native-word-trans::before {
    content: '·';
    opacity: 0.4;
    font-style: normal;
}

/* Short definition translation line */
.native-def-line {
    font-size: 0.82em;
    color: var(--text-dim);
    font-style: italic;
    margin-top: 2px;
    padding-left: 4px;
    border-left: 2px solid var(--accent);
    opacity: 0.85;
    animation: ns-fadein 0.35s ease;
}

/* Locked state — blur */
.native-locked {
    filter: blur(5px);
    user-select: none;
    pointer-events: none;
    opacity: 0.6;
    transition: filter 0.3s;
}

.native-locked-wrapper {
    position: relative;
    display: inline-block;
}

.native-lock-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 2;
}

.native-lock-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 8px;
    background: rgba(0,210,200,0.12);
    border: 1px solid var(--accent);
    border-radius: 99px;
    color: var(--accent);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.native-lock-btn:hover {
    background: rgba(0,210,200,0.22);
    transform: scale(1.04);
}

/* MCQ option with translation shown below */
.native-option-trans {
    font-size: 0.72em;
    color: var(--text-dim);
    font-style: italic;
    display: block;
    margin-top: 1px;
    opacity: 0.8;
}

/* Loading shimmer for pending translations */
.native-loading {
    display: inline-block;
    width: 60px;
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--border) 25%, var(--surface-light) 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: ns-shimmer 1.2s infinite linear;
    vertical-align: middle;
    margin-left: 6px;
}

/* ══════════════════════════════════════════════════════════════
   5. Unlock Modal
   ══════════════════════════════════════════════════════════════ */

.native-unlock-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(6px);
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.native-unlock-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.native-unlock-modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 28px 24px 24px;
    max-width: 380px;
    width: 100%;
    position: relative;
    transform: translateY(20px) scale(0.97);
    transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.22s;
    box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

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

.native-unlock-modal__close {
    position: absolute;
    top: 14px;
    right: 16px;
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--text-dim);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 6px;
    transition: background 0.15s, color 0.15s;
}

.native-unlock-modal__close:hover {
    background: var(--border);
    color: var(--text);
}

.native-unlock-modal__icon {
    font-size: 2.4rem;
    text-align: center;
    margin-bottom: 8px;
}

.native-unlock-modal__title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text);
    text-align: center;
    margin-bottom: 4px;
}

.native-unlock-modal__sub {
    font-size: 0.82rem;
    color: var(--text-dim);
    text-align: center;
    margin-bottom: 20px;
    line-height: 1.5;
}

.native-unlock-divider {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 16px 0;
    color: var(--text-dim);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.native-unlock-divider::before,
.native-unlock-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.native-unlock-path {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.native-unlock-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 18px;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
    width: 100%;
}

.native-unlock-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.2);
}

.native-unlock-btn:active:not(:disabled) {
    transform: translateY(0);
}

.native-unlock-btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.native-unlock-btn--trial {
    background: linear-gradient(135deg, var(--accent), #0ea5e9);
    color: #000;
}

.native-unlock-btn--gem {
    background: linear-gradient(135deg, #7c3aed, #a855f7);
    color: #fff;
}

.native-unlock-btn--ads {
    background: var(--surface-light);
    color: var(--text);
    border: 1.5px solid var(--border);
}

.native-unlock-btn--login {
    background: transparent;
    color: var(--accent);
    border: 1.5px solid var(--accent);
}

/* Ad progress bar */
.native-ad-progress {
    margin-top: 12px;
    display: none;
}

.native-ad-progress.visible {
    display: block;
}

.native-ad-bar-track {
    height: 6px;
    border-radius: 99px;
    background: var(--border);
    overflow: hidden;
    margin-bottom: 6px;
}

.native-ad-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #0ea5e9);
    border-radius: 99px;
    width: 0%;
    transition: width 0.5s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.native-ad-progress-label {
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
}

/* Success state */
.native-unlock-success {
    text-align: center;
    padding: 8px 0;
    animation: ns-fadein 0.4s ease;
}

.native-unlock-success__icon {
    font-size: 2.8rem;
    margin-bottom: 8px;
}

.native-unlock-success__text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.native-unlock-success__time {
    font-size: 0.8rem;
    color: var(--accent);
    margin-top: 4px;
}

/* ══════════════════════════════════════════════════════════════
   6. Animations
   ══════════════════════════════════════════════════════════════ */

@keyframes ns-fadein {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes ns-pulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

@keyframes ns-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}