/* ==========================================================================
   SageDeck — site.css
   Tokens, base and the components every page shares: header, footer,
   buttons, chips, ask bar, card tiles, section heads, dialogs, focus.
   index.html loads it first; the server-rendered pages load it with
   pages.css (lib/site-chrome.js).
   ========================================================================== */

:root {
    /* Palette — same values as the iOS app */
    --navy: #081020;
    --teal: #0E2A42;
    --teal-2: #16384F;
    --gold: #D7C382;
    --gold-hi: #E4D49E;
    --gold-lo: #C2AB66;
    --purple: #7030A0;
    --purple-hi: #A050C8;
    --cream: #FFF0D9;

    /* Roles */
    --color-bg: var(--navy);
    --color-surface-1: #0D1B2E;
    --color-surface-2: #112339;
    --color-surface-3: #183049;
    --color-glass: rgba(8, 16, 32, 0.78);
    --color-border-subtle: rgba(215, 195, 130, 0.12);
    --color-border: rgba(215, 195, 130, 0.24);
    --color-border-strong: rgba(215, 195, 130, 0.5);
    --color-text: #F5EEDF;
    --color-text-2: #C9C2B3;
    --color-text-3: #918B80;
    --color-gold: var(--gold);
    --color-gold-hover: var(--gold-hi);
    --color-on-gold: var(--navy);
    --color-purple-soft: rgba(112, 48, 160, 0.22);
    --color-success: #8CCFA8;

    --gradient-gold: linear-gradient(180deg, #E2D094 0%, #D7C382 100%);
    --glow-hero: radial-gradient(55% 50% at 50% 45%, rgba(112, 48, 160, 0.32), transparent 70%);

    /* Type */
    --font-heading: "Playfair Display", Georgia, "Times New Roman", "Noto Serif", "Noto Serif Thai", "Noto Serif KR", "AppleMyungjo", "Songti SC", "Noto Serif CJK SC", serif;
    --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans Thai", "Thonburi", "Leelawadee UI", "Apple SD Gothic Neo", "Malgun Gothic", "PingFang SC", "Hiragino Sans", "Microsoft YaHei", sans-serif;
    --step--2: clamp(0.781rem, 0.770rem + 0.048vw, 0.8125rem);
    --step--1: clamp(0.875rem, 0.852rem + 0.095vw, 0.9375rem);
    --step-0: clamp(1rem, 0.954rem + 0.19vw, 1.125rem);
    --step-1: clamp(1.1875rem, 1.118rem + 0.286vw, 1.375rem);
    --step-2: clamp(1.375rem, 1.236rem + 0.571vw, 1.75rem);
    --step-3: clamp(1.6875rem, 1.479rem + 0.857vw, 2.25rem);
    --step-4: clamp(2rem, 1.675rem + 1.333vw, 2.875rem);
    --step-5: clamp(2.375rem, 1.864rem + 2.095vw, 3.75rem);
    --lh-tight: 1.12;
    --lh-snug: 1.3;
    --lh-body: 1.6;
    --lh-reading: 1.7;
    --tracking-display: -0.01em;
    --tracking-eyebrow: 0.14em;

    /* Space (4px base) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
    --space-8: 64px;
    --space-9: 96px;
    --section-y: clamp(4rem, 2.7rem + 5.333vw, 7.5rem);
    --gutter: clamp(1rem, 0.629rem + 1.524vw, 2rem);
    --wrap: 1120px;
    --wrap-narrow: 720px;
    --header-h: 56px;

    /* Radius, shadow, motion */
    --radius-s: 6px;
    --radius-m: 12px;
    --radius-l: 20px;
    --radius-full: 999px;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.2);
    --shadow-2: 0 6px 20px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.25);
    --shadow-3: 0 24px 60px rgba(0, 0, 0, 0.55), 0 8px 20px rgba(0, 0, 0, 0.3);
    --glow-gold: 0 0 0 1px rgba(215, 195, 130, 0.4), 0 8px 28px rgba(215, 195, 130, 0.18);
    --dur-1: 120ms;
    --dur-2: 200ms;
    --dur-3: 320ms;
    --dur-4: 600ms;
    --ease-out: cubic-bezier(0.22, 0.8, 0.24, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
    --z-header: 800;
    --z-dropdown: 850;
    --z-sticky: 900;
    --z-overlay: 1000;
    --z-moment: 1500;
}

@media (min-width: 960px) {
    :root { --header-h: 60px; }
}

:lang(th) { --lh-body: 1.75; --lh-reading: 1.8; --lh-tight: 1.35; }

/* ---------- Base ---------- */
/* Margin reset, the night sky and Inter body type, for every page. */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { background: var(--navy); }

body {
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    background: linear-gradient(135deg, var(--navy) 0%, var(--teal) 100%) fixed;
    color: var(--color-text);
    font-family: var(--font-body);
    font-synthesis-style: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Fixed sky that also covers the safe areas and overscroll */
body::before {
    content: '';
    position: fixed;
    inset: -100px;
    z-index: -1;
    background: linear-gradient(135deg, var(--navy) 0%, var(--teal) 100%);
    pointer-events: none;
}

/* Starfield: two tile scales drifting slowly behind everything */
body::after {
    content: '';
    position: fixed;
    top: -600px;
    right: 0;
    bottom: -600px;
    left: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        radial-gradient(1px 1px at 22px 34px, rgba(255, 255, 255, 0.55), transparent),
        radial-gradient(1px 1px at 178px 122px, rgba(215, 195, 130, 0.5), transparent),
        radial-gradient(1.5px 1.5px at 305px 250px, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(1px 1px at 410px 96px, rgba(255, 255, 255, 0.35), transparent),
        radial-gradient(2px 2px at 95px 405px, rgba(215, 195, 130, 0.35), transparent),
        radial-gradient(1px 1px at 340px 435px, rgba(255, 255, 255, 0.5), transparent),
        radial-gradient(1.5px 1.5px at 60px 210px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(1px 1px at 250px 175px, rgba(215, 195, 130, 0.4), transparent);
    background-size: 480px 480px, 480px 480px, 640px 640px, 640px 640px, 760px 760px, 760px 760px, 520px 520px, 520px 520px;
    opacity: 0.75;
    animation: starDrift 180s linear infinite;
}

@keyframes starDrift {
    to { transform: translateY(600px); }
}

button { font: inherit; color: inherit; }

/* ---------- Utilities ---------- */

.hidden { display: none !important; }

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.wrap {
    width: 100%;
    max-width: var(--wrap);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.icon {
    width: 1.25em;
    height: 1.25em;
    flex: none;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.2em;
}

:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
}

.skip-link {
    position: absolute;
    left: var(--space-4);
    top: -100px;
    z-index: 3000;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-s);
    background: var(--color-gold);
    color: var(--color-on-gold);
    font: 600 var(--step--1) var(--font-body);
    text-decoration: none;
}

.skip-link:focus { top: var(--space-3); }

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: 44px;
    padding: 0 var(--space-5);
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    font-family: var(--font-body);
    font-size: var(--step--1);
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0.01em;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color var(--dur-2) var(--ease-out), border-color var(--dur-2) var(--ease-out),
                color var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out), transform var(--dur-1) var(--ease-out);
}

.btn:active { transform: translateY(1px); }

.btn--gold {
    background: var(--gradient-gold);
    color: var(--color-on-gold);
    box-shadow: var(--shadow-1);
}

.btn--gold:hover { background: var(--color-gold-hover); box-shadow: var(--glow-gold); }

.btn--outline {
    background: transparent;
    border-color: var(--color-border-strong);
    color: var(--color-gold);
}

.btn--outline:hover { border-color: var(--color-gold); background: rgba(215, 195, 130, 0.08); }

.btn--ghost {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn--ghost:hover { border-color: var(--color-border-strong); background: rgba(215, 195, 130, 0.06); }

.btn--sm { min-height: 36px; padding: 0 var(--space-4); font-size: var(--step--2); }
.btn--lg { min-height: 52px; padding: 0 var(--space-6); font-size: var(--step-0); }
.btn--block { width: 100%; }

/* ---------- Chips ---------- */

.chip {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: rgba(17, 35, 57, 0.6);
    color: var(--color-text-2);
    font-family: var(--font-body);
    font-size: var(--step--1);
    line-height: 1.25;
    text-align: left;
    cursor: pointer;
    transition: border-color var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out), background-color var(--dur-2) var(--ease-out);
}

.chip:hover { border-color: var(--color-border-strong); color: var(--color-text); background: var(--color-surface-3); }

.chip--more { color: var(--color-gold); border-style: dashed; }

/* ---------- Section heads, eyebrows ---------- */

.eyebrow {
    display: inline-block;
    color: var(--color-gold);
    font-size: var(--step--2);
    font-weight: 600;
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
}

.section-head {
    max-width: 640px;
    margin: 0 auto var(--space-7);
    text-align: center;
}

.section-head h2 {
    margin-top: var(--space-3) !important;
    font-size: var(--step-3);
    line-height: var(--lh-tight);
}

.section-head p {
    margin-top: var(--space-4) !important;
    color: var(--color-text-2);
    font-size: var(--step-0);
    line-height: var(--lh-body);
}

/* ---------- Ask bar (homepage hero, deck pages) ---------- */

.ask-bar {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    max-width: 34rem;
    margin: var(--space-6) auto 0;
    padding: var(--space-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    background: rgba(17, 35, 57, 0.82);
    box-shadow: var(--shadow-2);
    transition: border-color var(--dur-2) var(--ease-out), box-shadow var(--dur-2) var(--ease-out);
}

.ask-bar:focus-within {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-2), 0 0 0 4px rgba(215, 195, 130, 0.12);
}

.ask-bar textarea,
.ask-bar input {
    flex: 1;
    min-height: 52px;
    max-height: 7.5em;
    padding: 14px var(--space-4);
    border: 0;
    background: transparent;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    resize: none;
    overflow-y: auto;
}

.ask-bar :is(textarea, input)::placeholder { color: var(--color-text-3); }
.ask-bar :is(textarea, input):focus { outline: none; }
.ask-bar .btn { min-height: 48px; }

@media (min-width: 600px) {
    .ask-bar {
        flex-direction: row;
        align-items: flex-end;
        border-radius: 28px;
        padding: 6px;
    }
    .ask-bar textarea,
.ask-bar input { min-height: 48px; padding: 12px var(--space-4) 12px var(--space-5); }
    .ask-bar .btn { border-radius: 24px; padding-inline: var(--space-5); }
}

.ask-hint {
    max-width: 34rem;
    margin: var(--space-3) auto 0 !important;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-m);
    background: var(--color-purple-soft);
    color: var(--color-text);
    font-size: var(--step--1);
    line-height: var(--lh-body);
    text-align: left;
}

/* ---------- Card tiles (homepage deck preview, deck pages) ---------- */

.tiles {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 46%;
    gap: var(--space-4);
    margin: 0 calc(var(--gutter) * -1);
    padding: 0 var(--gutter) var(--space-2);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    list-style: none;
}

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

@media (min-width: 600px) {
    .tiles {
        grid-auto-flow: row;
        grid-template-columns: repeat(4, 1fr);
        grid-auto-columns: auto;
        margin: 0;
        padding: 0;
        overflow: visible;
    }
}

.tile {
    display: block;
    scroll-snap-align: start;
    color: inherit;
    text-decoration: none;
}

.tile img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 3;
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-2);
    transition: transform var(--dur-3) var(--ease-out), box-shadow var(--dur-3) var(--ease-out);
}

.tile:hover img { transform: translateY(-4px); box-shadow: var(--shadow-3); }

.tile__name {
    display: block;
    margin-top: var(--space-3);
    color: var(--color-text);
    font-family: var(--font-heading);
    font-size: var(--step-0);
    font-weight: 600;
}

.tile__meaning {
    display: block;
    margin-top: 2px;
    color: var(--color-text-3);
    font-size: var(--step--1);
}

/* ---------- Closing CTA ---------- */

.closing {
    max-width: 880px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    background:
        radial-gradient(60% 120% at 50% 0%, rgba(112, 48, 160, 0.3), transparent 70%),
        var(--color-surface-1);
    text-align: center;
}

.closing h2 { font-size: var(--step-4); line-height: var(--lh-tight); }

.closing p {
    margin-top: var(--space-3) !important;
    color: var(--color-text-2);
    font-size: var(--step-0);
}

.closing .btn { margin-top: var(--space-6); }

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    height: var(--header-h);
    background: var(--color-glass);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    backdrop-filter: blur(12px) saturate(140%);
    border-bottom: 1px solid transparent;
    transition: border-color var(--dur-3) var(--ease-out), background-color var(--dur-3) var(--ease-out);
}

.site-header.is-scrolled { border-bottom-color: var(--color-border-subtle); }

.site-header__inner {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    height: 100%;
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-gold);
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: var(--tracking-display);
    text-decoration: none;
}

.wordmark .icon { width: 1rem; height: 1rem; fill: currentColor; stroke: none; }

.site-nav {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-left: auto;
}

.site-nav a {
    color: var(--color-text-2);
    font-size: var(--step--1);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--dur-2) var(--ease-out);
}

.site-nav a:hover { color: var(--color-text); }

.site-header #accountBtn {
    gap: var(--space-2);
}

.site-header #accountBtn .account-label { display: none; }

@media (max-width: 599px) {
    .site-header__inner { gap: var(--space-4); }
    .site-nav { gap: var(--space-4); }
    .hide-sm { display: none; }
}

@media (min-width: 600px) {
    .site-header #accountBtn .account-label { display: inline; }
}

/* Off the homepage the header is just the wordmark and the account button */
body[data-screen]:not([data-screen="welcomeScreen"]) .site-nav a.hide-sm { display: none; }

/* ---------- Footer ---------- */

.site-footer {
    text-align: left;
    border-top: 1px solid var(--color-border-subtle);
    background: rgba(8, 16, 32, 0.6);
    padding-block: var(--space-8) var(--space-6);
}

body[data-screen]:not([data-screen="welcomeScreen"]) .site-footer { display: none; }

.site-footer__grid {
    display: grid;
    gap: var(--space-6);
}

@media (min-width: 600px) {
    .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }
}

.site-footer .wordmark { font-size: 1.2rem; }

.site-footer__tagline {
    margin: var(--space-3) 0 0;
    max-width: 32ch;
    color: var(--color-text-2);
    font-size: var(--step--1);
    line-height: var(--lh-body);
}

.site-footer h2 {
    margin: 0 0 var(--space-3);
    color: var(--color-text-3);
    font-family: var(--font-body);
    font-size: var(--step--2);
    font-weight: 600;
    letter-spacing: var(--tracking-eyebrow);
    text-transform: uppercase;
}

.site-footer ul { margin: 0; padding: 0; list-style: none; }
.site-footer li + li { margin-top: var(--space-2); }

.site-footer a:not(.wordmark) {
    color: var(--color-text-2);
    font-size: var(--step--1);
    text-decoration: none;
}

.site-footer a:not(.wordmark):hover { color: var(--color-gold); }

.site-footer__legal {
    margin-top: var(--space-7);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-border-subtle);
    color: var(--color-text-3);
    font-size: var(--step--2);
}

:lang(th) .eyebrow,
:lang(ko) .eyebrow,
:lang(zh) .eyebrow,
:lang(ja) .eyebrow { letter-spacing: 0; text-transform: none; }

/* ---------- Dialogs (native <dialog>, see presentDialog in app.js) ---------- */

.sd-dialog {
    width: 100%;
    max-width: min(460px, calc(100vw - 32px));
    max-height: calc(100dvh - 32px);
    margin: auto;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--color-text);
    overflow: visible;
}

.sd-dialog--wide { max-width: min(760px, calc(100vw - 32px)); }

/* showModal() can focus the dialog itself; its controls show focus instead */
.sd-dialog:focus,
.sd-dialog:focus-visible { outline: none; }

.sd-dialog::backdrop {
    background: rgba(4, 8, 16, 0.72);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
}

.sd-dialog[open] { animation: dialogIn var(--dur-3) var(--ease-out); }

/* The panel inside scrolls when it's taller than the screen */
.sd-dialog > * {
    max-height: calc(100dvh - 32px);
    overflow-y: auto;
    overscroll-behavior: contain;
}

@keyframes dialogIn {
    from { opacity: 0; transform: translateY(8px) scale(0.98); }
}

body:has(dialog[open]) { overflow: hidden; }

/* ---------- Motion preference ---------- */

@media (prefers-reduced-motion: reduce) {
    body::after { animation: none; }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}