/* ============================================================
   PHONETIC ALPHABET STUDIO — themeable UI.
   Pure CSS, no dependencies. Colours are driven by CSS variables
   so each [data-theme] simply overrides the palette below.
   Default (no attribute) = the "Professional" theme.
   ============================================================ */

:root,
:root[data-theme="pro"] {
    /* Professional — clean steel-blue on graphite (default) */
    --bg: #0d1117;
    --bg-2: #141b26;
    --panel: rgba(22, 28, 40, 0.82);
    --panel-2: rgba(30, 38, 54, 0.6);
    --accent: #4c8dff;
    --accent-rgb: 76, 141, 255;
    --accent-soft: #a9c8ff;
    --accent-dim: #3b6fd0;
    --accent-faint: #24446f;
    --ink: #e6edf3;
    --ink-dim: #9aa7b6;
    --border: rgba(76, 141, 255, 0.26);
    --border-strong: rgba(76, 141, 255, 0.55);
    --input-bg: rgba(0, 0, 0, 0.32);
    --amber: #ffb84d;
    --red: #ff6b7a;
    --glow: 0 0 8px rgba(76, 141, 255, 0.22);
    --glow-strong: 0 0 16px rgba(76, 141, 255, 0.3);
    --letter-shadow: 0 0 8px rgba(76, 141, 255, 0.35);
    --mono: "SF Mono", "Cascadia Code", "JetBrains Mono", "Roboto Mono", "Courier New", ui-monospace, monospace;
    --radius: 12px;
}

/* ---- Slate — neutral, muted grey (bland) ---- */
:root[data-theme="slate"] {
    --bg: #0f1216;
    --bg-2: #171b21;
    --panel: rgba(26, 30, 36, 0.85);
    --panel-2: rgba(36, 41, 48, 0.6);
    --accent: #9fb0c3;
    --accent-rgb: 159, 176, 195;
    --accent-soft: #cdd7e2;
    --accent-dim: #7a899b;
    --accent-faint: #3a444f;
    --ink: #e4e8ee;
    --ink-dim: #97a1ad;
    --border: rgba(159, 176, 195, 0.22);
    --border-strong: rgba(159, 176, 195, 0.45);
    --input-bg: rgba(0, 0, 0, 0.28);
    --amber: #e0b877;
    --red: #e58b93;
    --glow: 0 0 6px rgba(159, 176, 195, 0.16);
    --glow-strong: 0 0 12px rgba(159, 176, 195, 0.22);
    --letter-shadow: none;
}

/* ---- Paper — light, minimal (bland) ---- */
:root[data-theme="paper"] {
    --bg: #eef1f5;
    --bg-2: #e2e7ee;
    --panel: rgba(255, 255, 255, 0.9);
    --panel-2: rgba(246, 248, 251, 0.92);
    --accent: #2563eb;
    --accent-rgb: 37, 99, 235;
    --accent-soft: #1e40af;
    --accent-dim: #3b82f6;
    --accent-faint: #bcd0f5;
    --ink: #1a2230;
    --ink-dim: #5b6675;
    --border: rgba(37, 99, 235, 0.22);
    --border-strong: rgba(37, 99, 235, 0.5);
    --input-bg: rgba(255, 255, 255, 0.9);
    --amber: #b7791f;
    --red: #dc2626;
    --glow: none;
    --glow-strong: 0 0 0 rgba(0, 0, 0, 0);
    --letter-shadow: none;
}

/* ---- Amber CRT — classic phosphor (normal) ---- */
:root[data-theme="amber"] {
    --bg: #140d02;
    --bg-2: #1e1405;
    --panel: rgba(30, 20, 5, 0.75);
    --panel-2: rgba(42, 28, 8, 0.6);
    --accent: #ffb000;
    --accent-rgb: 255, 176, 0;
    --accent-soft: #ffd27f;
    --accent-dim: #b57a00;
    --accent-faint: #5c3d00;
    --ink: #ffe6b3;
    --ink-dim: #c79a55;
    --border: rgba(255, 176, 0, 0.28);
    --border-strong: rgba(255, 176, 0, 0.6);
    --input-bg: rgba(0, 0, 0, 0.35);
    --amber: #ffd27f;
    --red: #ff6b5a;
    --glow: 0 0 10px rgba(255, 176, 0, 0.4);
    --glow-strong: 0 0 22px rgba(255, 176, 0, 0.5);
    --letter-shadow: 0 0 10px rgba(255, 176, 0, 0.7), 0 0 22px rgba(255, 176, 0, 0.35);
}

/* ---- Terminal Green — the original phosphor look ---- */
:root[data-theme="terminal"] {
    --bg: #03100a;
    --bg-2: #061c11;
    --panel: rgba(6, 26, 16, 0.72);
    --panel-2: rgba(9, 38, 22, 0.6);
    --accent: #39ff9e;
    --accent-rgb: 57, 255, 158;
    --accent-soft: #9bffcb;
    --accent-dim: #1f9e63;
    --accent-faint: #0f5537;
    --ink: #c8ffe2;
    --ink-dim: #6fcf9c;
    --border: rgba(57, 255, 158, 0.28);
    --border-strong: rgba(57, 255, 158, 0.6);
    --input-bg: rgba(0, 0, 0, 0.35);
    --amber: #ffb84d;
    --red: #ff5a6e;
    --glow: 0 0 10px rgba(57, 255, 158, 0.45);
    --glow-strong: 0 0 22px rgba(57, 255, 158, 0.5);
    --letter-shadow: 0 0 10px rgba(57, 255, 158, 0.7), 0 0 22px rgba(57, 255, 158, 0.35);
}

/* ---- Arcane — magical violet & gold ---- */
:root[data-theme="arcane"] {
    --bg: #0d0518;
    --bg-2: #170a2c;
    --panel: rgba(28, 14, 48, 0.75);
    --panel-2: rgba(40, 20, 68, 0.6);
    --accent: #b98bff;
    --accent-rgb: 185, 139, 255;
    --accent-soft: #e6c8ff;
    --accent-dim: #8b5cf6;
    --accent-faint: #43296e;
    --ink: #efe6ff;
    --ink-dim: #b8a8d8;
    --border: rgba(185, 139, 255, 0.3);
    --border-strong: rgba(185, 139, 255, 0.62);
    --input-bg: rgba(10, 4, 22, 0.5);
    --amber: #ffd76a;
    --red: #ff6b9d;
    --glow: 0 0 12px rgba(185, 139, 255, 0.5);
    --glow-strong: 0 0 26px rgba(185, 139, 255, 0.6);
    --letter-shadow: 0 0 12px rgba(185, 139, 255, 0.75), 0 0 26px rgba(255, 215, 106, 0.3);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--mono);
    color: var(--ink);
    min-height: 100vh;
    padding: clamp(14px, 3vw, 40px)
             calc(clamp(14px, 3vw, 40px) + env(safe-area-inset-right))
             calc(clamp(14px, 3vw, 40px) + env(safe-area-inset-bottom))
             calc(clamp(14px, 3vw, 40px) + env(safe-area-inset-left));
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background:
        radial-gradient(1100px 600px at 50% -10%, rgba(var(--accent-rgb), 0.08), transparent 60%),
        radial-gradient(900px 500px at 50% 120%, rgba(var(--accent-rgb), 0.06), transparent 60%),
        linear-gradient(180deg, var(--bg-2), var(--bg));
    background-attachment: fixed;
}

/* ---------- CRT overlays (only shown on the phosphor themes) ---------- */
.scanlines, .vignette { display: none; }
:root[data-theme="amber"] .scanlines,
:root[data-theme="terminal"] .scanlines,
:root[data-theme="arcane"] .scanlines,
:root[data-theme="amber"] .vignette,
:root[data-theme="terminal"] .vignette,
:root[data-theme="arcane"] .vignette { display: block; }
.scanlines {
    position: fixed; inset: 0; z-index: 60; pointer-events: none;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0) 0px,
        rgba(0, 0, 0, 0) 2px,
        rgba(0, 20, 10, 0.28) 3px,
        rgba(0, 20, 10, 0.28) 3px);
    mix-blend-mode: multiply;
    animation: scan 8s linear infinite;
    opacity: 0.5;
}
@keyframes scan { to { background-position: 0 100px; } }

.vignette {
    position: fixed; inset: 0; z-index: 61; pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.75) 100%);
}

/* ---------- Terminal shell ---------- */
.terminal {
    position: relative;
    width: 100%;
    max-width: 1120px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.6),
                0 0 60px rgba(var(--accent-rgb), 0.06),
                inset 0 0 80px rgba(var(--accent-rgb), 0.03);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: clamp(16px, 3vw, 28px);
    z-index: 1;
}
/* Corner accents */
.terminal::before,
.terminal::after {
    content: ""; position: absolute; width: 18px; height: 18px; pointer-events: none;
}
.terminal::before { top: 8px; left: 8px; border-top: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.terminal::after { bottom: 8px; right: 8px; border-bottom: 2px solid var(--accent); border-right: 2px solid var(--accent); }

/* ---------- Header ---------- */
.term-header {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 12px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-dot {
    width: 11px; height: 11px; border-radius: 50%;
    background: var(--accent); box-shadow: var(--glow);
    animation: pulse 2.4s ease-in-out infinite; flex: none;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }
.term-title {
    font-size: clamp(0.95rem, 2.4vw, 1.35rem);
    font-weight: 700; letter-spacing: 0.14em;
    color: var(--accent-soft); text-shadow: var(--glow);
}

.header-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* Wake-lock status pill (toggle button) */
.status-pill {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em;
    padding: 7px 12px; border-radius: 999px; cursor: pointer;
    color: var(--ink-dim);
    background: var(--panel-2);
    border: 1px solid var(--border);
    transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}
.status-pill:hover { border-color: var(--border-strong); }
.status-pill .pip { width: 8px; height: 8px; border-radius: 50%; background: var(--ink-dim); flex: none; }
#mutePip { width: auto; height: auto; border-radius: 0; background: transparent; box-shadow: none; font-size: 0.9rem; line-height: 1; }
.status-pill.on { color: var(--accent); border-color: var(--border-strong); box-shadow: var(--glow); }
.status-pill.on .pip { background: var(--accent); box-shadow: var(--glow); }
.status-pill.on #mutePip { background: transparent; box-shadow: none; }
.status-pill.off { color: var(--amber); }
.status-pill.off .pip { background: var(--amber); }
.status-pill.off #mutePip { background: transparent; }
.status-pill.unsupported { color: var(--red); }
.status-pill.unsupported .pip { background: var(--red); }

/* ---------- Controls (alphabet + theme selectors) ---------- */
.controls {
    display: flex; flex-wrap: wrap; gap: 12px; margin: 14px 0 4px;
}
.control { display: flex; flex-direction: column; gap: 5px; flex: 1 1 200px; min-width: 0; }
.control-label {
    font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--ink-dim);
}
.select {
    font-family: var(--mono); font-size: 0.86rem; font-weight: 600; letter-spacing: 0.03em;
    color: var(--accent-soft); cursor: pointer;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px; padding: 10px 12px;
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none; appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--accent) 50%),
                      linear-gradient(135deg, var(--accent) 50%, transparent 50%);
    background-position: calc(100% - 18px) center, calc(100% - 13px) center;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    padding-right: 34px;
}
.select:hover { border-color: var(--border-strong); }
.select:focus-visible { outline: none; border-color: var(--border-strong); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.14); }
.select option, .select optgroup { color: #111; background: #fff; }

/* ---------- Intro ---------- */
.intro {
    margin: 16px 0 4px; color: var(--ink);
    font-size: clamp(0.85rem, 2vw, 0.98rem); line-height: 1.6;
}
.intro strong { color: var(--accent-soft); text-shadow: var(--glow); }
.intro-sub { display: block; color: var(--ink-dim); font-size: 0.82rem; margin-top: 4px; }

/* ---------- Translator ---------- */
.translator {
    margin: 18px 0 22px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(14px, 2.5vw, 20px);
}
.field-label {
    font-size: 0.72rem; letter-spacing: 0.12em; color: var(--ink-dim);
    margin-bottom: 10px; text-transform: uppercase;
}
.field-label .prompt { color: var(--accent); text-shadow: var(--glow); font-weight: 700; }

.translate-input {
    width: 100%; resize: vertical; min-height: 54px;
    font-family: var(--mono); font-size: 1.05rem; line-height: 1.4;
    color: var(--accent-soft);
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px; padding: 12px 14px;
    caret-color: var(--accent);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.translate-input::placeholder { color: var(--ink-dim); opacity: 0.7; }
.translate-input:focus {
    outline: none; border-color: var(--border-strong);
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.12), inset 0 0 18px rgba(var(--accent-rgb), 0.05);
}

.io-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.btn {
    font-family: var(--mono); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em;
    color: var(--accent); cursor: pointer;
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.12), rgba(var(--accent-rgb), 0.04));
    border: 1px solid var(--border-strong);
    border-radius: 8px; padding: 9px 16px;
    transition: transform 0.12s, box-shadow 0.2s, background 0.2s, color 0.2s;
}
.btn:hover { box-shadow: var(--glow); background: rgba(var(--accent-rgb), 0.18); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-ghost { color: var(--ink-dim); background: transparent; border-color: var(--border); }
.btn-ghost:hover { color: var(--red); border-color: var(--red); box-shadow: 0 0 10px rgba(255, 90, 110, 0.35); background: transparent; }

.output {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; min-height: 8px;
}
.chip {
    display: inline-flex; align-items: baseline; gap: 7px; cursor: pointer;
    padding: 6px 11px; border-radius: 7px;
    background: rgba(var(--accent-rgb), 0.08);
    border: 1px solid var(--border);
    transition: border-color 0.18s, box-shadow 0.18s, background 0.18s;
}
.chip:hover { border-color: var(--border-strong); box-shadow: var(--glow); background: rgba(var(--accent-rgb), 0.14); }
.chip .chip-char { font-size: 0.72rem; color: var(--accent); font-weight: 700; }
.chip .chip-word { font-size: 0.92rem; color: var(--accent-soft); letter-spacing: 0.05em; }
.chip.is-space { background: transparent; border: none; box-shadow: none; cursor: default; width: 100%; height: 0; padding: 0; }
.chip.is-literal { background: rgba(255, 184, 77, 0.1); border-color: rgba(255, 184, 77, 0.35); }
.chip.is-literal .chip-word { color: var(--amber); }
.output-empty { color: var(--ink-dim); font-size: 0.82rem; opacity: 0.7; }

/* ---------- Alphabet grid ---------- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}
.tile {
    position: relative; overflow: hidden; cursor: pointer; text-align: left;
    font-family: var(--mono);
    display: flex; flex-direction: column; gap: 4px;
    padding: 16px 16px 14px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: inset 0 0 24px rgba(var(--accent-rgb), 0.03);
    transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s, background 0.18s;
}
.tile::after {
    content: "\25B6"; position: absolute; top: 10px; right: 12px;
    font-size: 0.7rem; color: var(--accent); opacity: 0; transform: translateX(4px);
    transition: opacity 0.18s, transform 0.18s; text-shadow: var(--glow);
}
.tile:hover, .tile:focus-visible {
    transform: translateY(-3px); border-color: var(--border-strong); outline: none;
    background: linear-gradient(180deg, rgba(var(--accent-rgb), 0.16), rgba(var(--accent-rgb), 0.04));
    box-shadow: var(--glow-strong), inset 0 0 24px rgba(var(--accent-rgb), 0.08);
}
.tile:hover::after, .tile:focus-visible::after { opacity: 1; transform: translateX(0); }
.tile:active { transform: translateY(-1px) scale(0.99); }
.tile.flash { animation: flash 0.5s ease; }
@keyframes flash {
    0% { box-shadow: var(--glow-strong), inset 0 0 40px rgba(var(--accent-rgb), 0.4); border-color: var(--accent); }
    100% { box-shadow: inset 0 0 24px rgba(var(--accent-rgb), 0.03); }
}
.tile .t-letter {
    font-size: clamp(2rem, 6vw, 2.6rem); font-weight: 700; line-height: 1;
    color: var(--accent); text-shadow: var(--letter-shadow);
}
.tile .t-word { font-size: 0.98rem; letter-spacing: 0.12em; color: var(--accent-soft); }
.tile .t-pron { font-size: 0.68rem; letter-spacing: 0.05em; color: var(--ink-dim); }
.tile.is-digit .t-letter { color: var(--accent-soft); }

/* ---------- Footer ---------- */
.term-footer {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--border);
    color: var(--ink-dim); font-size: 0.74rem; letter-spacing: 0.06em;
}
.blink { color: var(--accent); text-shadow: var(--glow); animation: blink 1.1s step-end infinite; }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* ---------- Toast ---------- */
.toast {
    position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 20px);
    z-index: 80; pointer-events: none;
    font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.04em;
    color: var(--accent); background: var(--bg-2);
    border: 1px solid var(--border-strong); border-radius: 999px;
    padding: 9px 18px; box-shadow: var(--glow-strong);
    opacity: 0; transition: opacity 0.25s, transform 0.25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Konami hue burst ---------- */
@keyframes matrix { 0%, 100% { filter: hue-rotate(0deg); } 50% { filter: hue-rotate(140deg) saturate(1.4); } }

/* ---------- Arcane theme flourish ---------- */
:root[data-theme="arcane"] .term-title {
    background: linear-gradient(120deg, var(--accent-soft), var(--amber), var(--accent));
    background-size: 220% auto;
    -webkit-background-clip: text; background-clip: text;
    color: transparent; -webkit-text-fill-color: transparent;
    animation: arcane-shimmer 7s linear infinite;
}
:root[data-theme="arcane"] .brand-dot { background: var(--amber); box-shadow: 0 0 12px rgba(255, 215, 106, 0.7); }
@keyframes arcane-shimmer { to { background-position: 220% center; } }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
    .grid { grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 9px; }
    .tile { padding: 12px 12px 11px; }
    .term-title { letter-spacing: 0.08em; }
    .io-actions .btn { flex: 1 1 auto; text-align: center; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .scanlines { display: none; }
}