/* ============================================================
   Quran Web — stylesheet
   Mobile-first, no frameworks, no external fonts.
   - All colors are CSS variables, switched by [data-theme]
   - Honors OS dark/light via prefers-color-scheme by default
   - Honors user override stored in localStorage ("quran.theme")
   ============================================================ */

:root {
    /* Light theme (default) — warm cream paper, deep emerald accent */
    --bg: #fbf7ee;
    --bg-elevated: #ffffff;
    --bg-variant: #ede6d3;
    --fg: #1b1b1b;
    --fg-muted: #555050;
    --fg-faint: #7a7670;
    --primary: #0e5c3f;
    --on-primary: #ffffff;
    --outline: #d7cfb8;
    --divider: #e8e0c8;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);

    /* Type system — system fonts for native feel, no network calls */
    --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --font-arabic: "Geeza Pro", "SF Arabic", "Al Bayan", "Geeza",
        "Times New Roman", "Noto Naskh Arabic", "Amiri", serif;
    --font-arabic-fallback: "Geeza Pro", "SF Arabic", "Al Bayan",
        "Geeza", "Times New Roman", serif;

    color-scheme: light;
}

[data-theme="dark"] {
    --bg: #101312;
    --bg-elevated: #161a19;
    --bg-variant: #222827;
    --fg: #e7e5de;
    --fg-muted: #b7b6b0;
    --fg-faint: #888a85;
    --primary: #7bd0a7;
    --on-primary: #003824;
    --outline: #2e3633;
    --divider: #1f2624;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
}

/* Honor system preference only if user hasn't picked one. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg: #101312;
        --bg-elevated: #161a19;
        --bg-variant: #222827;
        --fg: #e7e5de;
        --fg-muted: #b7b6b0;
        --fg-faint: #888a85;
        --primary: #7bd0a7;
        --on-primary: #003824;
        --outline: #2e3633;
        --divider: #1f2624;
        --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
        color-scheme: dark;
    }
}

/* ============= Reset ============= */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    min-height: 100%;
    overscroll-behavior-y: contain;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
    min-height: 44px;
    min-width: 44px;
}

input,
textarea,
select {
    font: inherit;
    color: inherit;
}

img,
svg {
    max-width: 100%;
    display: block;
}

ul,
ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

/* ============= Splash ============= */
.splash {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    gap: 16px;
    background: var(--bg);
}

.splash__emblem {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    position: relative;
}

.splash__emblem::before,
.splash__emblem::after {
    content: "";
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    bottom: -16px;
}

.splash__emblem::before {
    left: 12px;
}

.splash__emblem::after {
    right: 12px;
}

.splash__text {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
    color: var(--fg-muted);
    letter-spacing: 0.02em;
}

/* ============= App shell ============= */
#app {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* ============= Top app bar ============= */
.appbar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg);
    border-bottom: 1px solid var(--divider);
    padding-top: var(--safe-top);
    /* The system status bar is transparent over our bg thanks to the
       viewport-fit=cover + body bg, so the appbar bleeds upward. */
    backdrop-filter: saturate(180%) blur(8px);
    -webkit-backdrop-filter: saturate(180%) blur(8px);
}

.appbar__inner {
    display: grid;
    grid-template-columns: 48px 1fr 48px;
    align-items: center;
    min-height: 56px;
    padding: 0 4px;
}

.appbar__slot {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.appbar__title {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: var(--fg);
    margin: 0;
    padding: 0 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.appbar__back,
.appbar__action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    min-width: 48px;
    border-radius: 50%;
    color: var(--fg);
}

.appbar__back:hover,
.appbar__back:focus-visible,
.appbar__action:hover,
.appbar__action:focus-visible {
    background: var(--bg-variant);
}

.appbar__back:focus-visible,
.appbar__action:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
}

/* ============= Home ============= */
.home__header {
    padding: 16px 20px 8px;
}

.home__subtitle {
    margin: 0;
    font-size: 14px;
    color: var(--fg-muted);
    line-height: 1.4;
}

.home__count {
    margin: 4px 0 0;
    font-size: 13px;
    color: var(--fg-faint);
}

.search {
    position: relative;
    padding: 8px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--divider);
}

.search input {
    width: 100%;
    height: 44px;
    padding: 0 16px 0 44px;
    border-radius: 22px;
    background: var(--bg-variant);
    border: 1px solid transparent;
    color: var(--fg);
    font-size: 16px;
    /* iOS zoom prevention */
    -webkit-appearance: none;
    appearance: none;
    transition: border-color 0.15s, background 0.15s;
}

.search input::placeholder {
    color: var(--fg-faint);
}

.search input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-elevated);
}

.search__icon {
    position: absolute;
    left: 30px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--fg-faint);
    pointer-events: none;
    width: 18px;
    height: 18px;
}

.filters {
    display: flex;
    gap: 8px;
    padding: 8px 16px;
    overflow-x: auto;
    scrollbar-width: none;
    background: var(--bg);
    border-bottom: 1px solid var(--divider);
}

.filters::-webkit-scrollbar {
    display: none;
}

.chip {
    flex-shrink: 0;
    height: 36px;
    padding: 0 16px;
    border-radius: 18px;
    background: var(--bg-variant);
    color: var(--fg-muted);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.chip[aria-pressed="true"] {
    background: var(--primary);
    color: var(--on-primary);
}

.surah-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px 16px;
    padding-bottom: calc(16px + var(--safe-bottom));
}

.surah-card {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 12px;
    border-radius: 12px;
    background: var(--bg-elevated);
    border: 1px solid transparent;
    box-shadow: var(--shadow);
    margin-bottom: 8px;
    transition: transform 0.1s ease-out, background 0.15s;
}

.surah-card:hover,
.surah-card:focus-visible {
    background: var(--bg-variant);
    outline: none;
}

.surah-card:active {
    transform: scale(0.98);
}

.surah-card__num {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--bg-variant);
    color: var(--fg-muted);
    font-size: 13px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.surah-card__body {
    flex: 1;
    min-width: 0;
}

.surah-card__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--fg);
    margin: 0 0 2px;
}

.surah-card__meta {
    font-size: 13px;
    color: var(--fg-muted);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.surah-card__arabic {
    font-family: var(--font-arabic);
    font-size: 22px;
    color: var(--primary);
    text-align: right;
    line-height: 1.2;
    flex-shrink: 0;
}

.empty {
    text-align: center;
    color: var(--fg-muted);
    padding: 48px 16px;
    font-size: 14px;
}

/* ============= Reader ============= */
.reader {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
    padding-bottom: calc(32px + var(--safe-bottom));
}

.reader__header {
    text-align: center;
    padding: 16px 8px 20px;
}

.reader__arabic-name {
    font-family: var(--font-arabic);
    font-size: 32px;
    line-height: 1.4;
    color: var(--primary);
    margin: 0 0 8px;
}

.reader__meta {
    font-size: 14px;
    color: var(--fg-muted);
    margin: 0;
    line-height: 1.5;
}

.reader__divider {
    border: 0;
    border-top: 1px solid var(--divider);
    margin: 8px 16px 0;
}

.ayah {
    background: var(--bg-elevated);
    border-radius: 12px;
    padding: 16px 18px;
    margin: 0 0 10px;
    box-shadow: var(--shadow);
}

.ayah__num {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    background: var(--bg-variant);
    color: var(--fg-muted);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 10px;
    font-variant-numeric: tabular-nums;
}

.ayah__text {
    font-family: var(--font-arabic);
    font-size: 26px;
    line-height: 2;
    color: var(--fg);
    text-align: right;
    direction: rtl;
    margin: 0;
    word-spacing: 0.05em;
}

.reader__footer {
    text-align: center;
    color: var(--fg-faint);
    font-size: 13px;
    margin-top: 24px;
    padding: 16px 0;
}

/* ============= Settings ============= */
.settings,
.licenses,
.about {
    padding: 16px;
    padding-bottom: calc(32px + var(--safe-bottom));
}

.settings h2,
.licenses h2,
.about h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--fg);
    margin: 16px 0 8px;
}

.settings h2:first-child,
.licenses h2:first-child,
.about h2:first-child {
    margin-top: 0;
}

.radio-list {
    background: var(--bg-elevated);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.radio-list__item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 14px 16px;
    min-height: 52px;
    color: var(--fg);
    border-top: 1px solid var(--divider);
    font-size: 15px;
}

.radio-list__item:first-child {
    border-top: 0;
}

.radio-list__item:active {
    background: var(--bg-variant);
}

.radio-list__item input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 2px solid var(--outline);
    margin: 0;
    flex-shrink: 0;
    position: relative;
    transition: border-color 0.15s, background 0.15s;
}

.radio-list__item input[type="radio"]:checked {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: inset 0 0 0 3px var(--bg-elevated);
}

.link-list {
    background: var(--bg-elevated);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.link-list__item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    text-align: left;
    padding: 14px 16px;
    min-height: 52px;
    color: var(--fg);
    border-top: 1px solid var(--divider);
    font-size: 15px;
}

.link-list__item:first-child {
    border-top: 0;
}

.link-list__item:active {
    background: var(--bg-variant);
}

.link-list__icon {
    width: 22px;
    height: 22px;
    color: var(--fg-muted);
    flex-shrink: 0;
}

.link-list__chev {
    margin-left: auto;
    color: var(--fg-faint);
    flex-shrink: 0;
}

.licenses p,
.about p {
    color: var(--fg);
    line-height: 1.6;
    margin: 0 0 12px;
}

.licenses .credit-verse {
    text-align: center;
    font-family: var(--font-arabic);
    font-size: 24px;
    color: var(--primary);
    margin: 24px 0 0;
    direction: rtl;
}

.licenses .url {
    font-size: 12px;
    color: var(--fg-faint);
    word-break: break-all;
}

.about .version {
    font-size: 13px;
    color: var(--fg-faint);
    margin: 0 0 16px;
}

/* ============= Modal (jump to ayah) ============= */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    padding: 16px;
    background: rgba(0, 0, 0, 0.4);
    animation: fade-in 0.15s ease-out;
}

.modal__panel {
    width: 100%;
    max-width: 360px;
    background: var(--bg-elevated);
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    animation: scale-in 0.15s ease-out;
}

.modal__title {
    margin: 0 0 16px;
    font-size: 18px;
    font-weight: 600;
}

.modal__input {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border-radius: 12px;
    background: var(--bg-variant);
    border: 1px solid var(--outline);
    color: var(--fg);
    font-size: 16px;
    -webkit-appearance: none;
    appearance: none;
}

.modal__input:focus {
    outline: none;
    border-color: var(--primary);
}

.modal__actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 20px;
}

.btn {
    min-height: 44px;
    padding: 0 20px;
    border-radius: 22px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    transition: background 0.15s;
}

.btn:hover,
.btn:focus-visible {
    background: var(--bg-variant);
    outline: none;
}

.btn:disabled {
    opacity: 0.4;
    pointer-events: none;
}

.btn--primary {
    background: var(--primary);
    color: var(--on-primary);
}

.btn--primary:hover,
.btn--primary:focus-visible {
    background: var(--primary);
    filter: brightness(0.9);
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* ============= Larger screens ============= */
@media (min-width: 720px) {
    .home__header {
        padding: 24px 32px 12px;
    }
    .search,
    .filters {
        padding-left: 32px;
        padding-right: 32px;
    }
    .surah-list {
        padding: 12px 24px 24px;
        max-width: 720px;
        margin: 0 auto;
    }
    .reader {
        max-width: 720px;
        margin: 0 auto;
    }
    .ayah__text {
        font-size: 30px;
        line-height: 2.1;
    }
    .settings,
    .licenses,
    .about {
        max-width: 640px;
        margin: 0 auto;
    }
}

/* ============= Reduced motion ============= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}