/* ============================================
   WORDTAP — stylesheet
   ============================================ */

:root {
    --bg:            #0d1117;
    --surface:       #161b22;
    --surface-alt:   #21262d;
    --border:        #30363d;
    --border-filled: #8b949e;
    --text:          #e6edf3;
    --text-muted:    #8b949e;
    --text-dim:      #484f58;

    --correct:       #3fb950;
    --correct-glow:  rgba(63, 185, 80, 0.35);
    --present:       #e3b341;
    --present-glow:  rgba(227, 179, 65, 0.35);
    --absent:        #2d333b;

    --key-bg:        #21262d;
    --key-text:      #e6edf3;

    --tile-size:     62px;
    --tile-gap:      6px;
    --tile-radius:   6px;

    --header-h:      60px;
    --font:          'Space Grotesk', sans-serif;

    --ease-bounce:   cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset ─────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;

    /* subtle ambient glow */
    background-image:
        radial-gradient(ellipse at 15% 40%, rgba(129, 140, 248, 0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 20%, rgba(232, 121, 249, 0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 50% 100%, rgba(63, 185, 80, 0.04) 0%, transparent 50%);
    background-attachment: fixed;
}

/* ── App shell ─────────────────────────────── */
#app {
    width: 100%;
    max-width: 500px;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ── Header ────────────────────────────────── */
header {
    width: 100%;
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
}

.brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    background: linear-gradient(-45deg, #e879f9, #818cf8, #38bdf8, #4ade80);
    background-size: 300% 300%;
    animation: gradient-shift 5s ease infinite;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

@keyframes gradient-shift {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.day-badge {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 2px 8px;
    letter-spacing: 0.05em;
}

.tagline {
    font-size: 0.68rem;
    color: var(--text-muted);
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.icon-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover {
    color: var(--text);
    border-color: var(--border-filled);
    background: var(--surface-alt);
}

/* ── Toast ─────────────────────────────────── */
#toast-container {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--text);
    color: var(--bg);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 8px;
    animation: toast-in 0.2s var(--ease-bounce) forwards;
    letter-spacing: 0.03em;
}
.toast.fade-out { animation: toast-out 0.3s ease forwards; }

@keyframes toast-in {
    from { opacity: 0; transform: translateY(-8px) scale(0.95); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toast-out {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(-8px); }
}

/* ── Board ─────────────────────────────────── */
main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 0 10px;
}

#board-container { display: flex; justify-content: center; }

#board {
    display: grid;
    grid-template-rows: repeat(6, var(--tile-size));
    gap: var(--tile-gap);
}

/* ── Tile ──────────────────────────────────── */
.tile-row {
    display: grid;
    grid-template-columns: repeat(5, var(--tile-size));
    gap: var(--tile-gap);
}

.tile {
    width: var(--tile-size);
    height: var(--tile-size);
    border: 2px solid var(--border);
    border-radius: var(--tile-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text);
    background: var(--bg);
    transition: border-color 0.1s;
    position: relative;
    user-select: none;
}

.tile[data-letter] {
    border-color: var(--border-filled);
}

/* Pop animation when a letter is typed */
.tile.pop {
    animation: pop 0.08s var(--ease-bounce);
}
@keyframes pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.12); }
    100% { transform: scale(1); }
}

/* Flip animation for reveal */
.tile.flip {
    animation: flip 0.45s ease forwards;
}
@keyframes flip {
    0%   { transform: rotateX(0deg); }
    49%  { transform: rotateX(-90deg); }
    50%  { transform: rotateX(-90deg); }
    100% { transform: rotateX(0deg); }
}

/* Tile states (applied mid-flip) */
.tile.correct {
    background: var(--correct);
    border-color: var(--correct);
    box-shadow: 0 0 16px var(--correct-glow), 0 0 4px var(--correct-glow);
    color: #fff;
}
.tile.present {
    background: var(--present);
    border-color: var(--present);
    box-shadow: 0 0 16px var(--present-glow), 0 0 4px var(--present-glow);
    color: #fff;
}
.tile.absent {
    background: var(--absent);
    border-color: var(--absent);
    color: var(--text-muted);
}

/* Bounce animation on win */
.tile.bounce {
    animation: bounce 0.6s var(--ease-bounce) forwards;
}
@keyframes bounce {
    0%   { transform: translateY(0); }
    40%  { transform: translateY(-22px); }
    70%  { transform: translateY(-10px); }
    85%  { transform: translateY(-16px); }
    100% { transform: translateY(0); }
}

/* Shake animation on invalid word */
.tile-row.shake {
    animation: shake 0.45s ease;
}
@keyframes shake {
    0%, 100%  { transform: translateX(0); }
    15%       { transform: translateX(-6px); }
    35%       { transform: translateX(6px); }
    55%       { transform: translateX(-4px); }
    75%       { transform: translateX(4px); }
    90%       { transform: translateX(-2px); }
}

/* ── Keyboard ──────────────────────────────── */
#keyboard {
    width: 100%;
    max-width: 500px;
    padding: 0 8px 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.key-row {
    display: flex;
    justify-content: center;
    gap: 5px;
}

.key {
    height: 56px;
    min-width: 36px;
    flex: 1;
    max-width: 43px;
    border: none;
    border-radius: 6px;
    background: var(--key-bg);
    color: var(--key-text);
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, transform 0.08s, box-shadow 0.15s;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.key:hover { background: #2d333b; }
.key:active { transform: scale(0.93); }

.key.wide {
    min-width: 54px;
    max-width: 66px;
    font-size: 0.72rem;
}

.key.correct {
    background: var(--correct);
    box-shadow: 0 0 10px var(--correct-glow);
    color: #fff;
}
.key.present {
    background: var(--present);
    box-shadow: 0 0 10px var(--present-glow);
    color: #fff;
}
.key.absent {
    background: var(--absent);
    color: var(--text-dim);
}

/* ── Modals ────────────────────────────────── */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.modal.open { display: flex; }

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    width: 100%;
    max-width: 420px;
    max-height: 90dvh;
    overflow-y: auto;
    animation: modal-in 0.25s var(--ease-bounce);
}
@keyframes modal-in {
    from { opacity: 0; transform: scale(0.92) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 16px;
    width: 30px;
    height: 30px;
    font-size: 1.3rem;
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: color 0.15s, background 0.15s;
}
.modal-close:hover { color: var(--text); background: var(--border); }

.modal-content h2 {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-align: center;
    margin-bottom: 16px;
    text-transform: uppercase;
    color: var(--text);
}
.modal-content h3 {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 20px 0 10px;
}
.modal-content p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 10px; }
.modal-content p strong { color: var(--text); }
.modal-content ul { padding-left: 18px; color: var(--text-muted); font-size: 0.9rem; line-height: 1.8; }

/* How to play examples */
.examples { margin: 18px 0; border-top: 1px solid var(--border); padding-top: 16px; }
.examples-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 14px !important;
}

.example-row {
    display: flex;
    gap: 5px;
    margin-bottom: 6px;
}
.example-tile {
    width: 46px;
    height: 46px;
    border: 2px solid var(--border);
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    text-transform: uppercase;
    background: var(--bg);
    color: var(--text);
}
.example-tile.correct {
    background: var(--correct); border-color: var(--correct); color: #fff;
    box-shadow: 0 0 10px var(--correct-glow);
}
.example-tile.present {
    background: var(--present); border-color: var(--present); color: #fff;
    box-shadow: 0 0 10px var(--present-glow);
}
.example-tile.absent {
    background: var(--absent); border-color: var(--absent); color: var(--text-muted);
}
.help-footer {
    border-top: 1px solid var(--border);
    padding-top: 14px;
    text-align: center;
    font-size: 0.8rem !important;
    color: var(--text-dim) !important;
}

/* Stats grid */
#stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 4px;
}
.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--surface-alt);
    border-radius: 10px;
    padding: 12px 6px;
    border: 1px solid var(--border);
}
.stat-item span {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}
.stat-item label {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 4px;
}

/* Guess distribution */
#guess-distribution {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.dist-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
}
.dist-label {
    width: 14px;
    text-align: right;
    color: var(--text-muted);
    font-weight: 600;
    flex-shrink: 0;
}
.dist-bar-wrap {
    flex: 1;
    background: var(--surface-alt);
    border-radius: 4px;
    height: 24px;
    overflow: hidden;
}
.dist-bar {
    height: 100%;
    min-width: 28px;
    background: var(--border-filled);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    transition: width 0.6s ease;
}
.dist-bar.highlight { background: var(--correct); box-shadow: 0 0 8px var(--correct-glow); }

/* Share */
#share-section {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}
.share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--correct);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 28px;
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
    letter-spacing: 0.05em;
    box-shadow: 0 0 16px var(--correct-glow);
}
.share-btn svg { width: 16px; height: 16px; }
.share-btn:hover { background: #2da040; transform: translateY(-1px); box-shadow: 0 4px 20px var(--correct-glow); }
.share-btn:active { transform: scale(0.97); }

/* ── Confetti canvas ───────────────────────── */
#confetti-canvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 300;
}

/* ── Responsive ────────────────────────────── */
@media (max-height: 680px) {
    :root { --tile-size: 52px; }
    .key { height: 48px; }
    main { padding: 10px 0 6px; }
}
@media (max-width: 380px) {
    :root { --tile-size: 54px; }
    #keyboard { padding-inline: 6px; }
    .key-row { gap: 4px; }
    .key { height: 52px; min-width: 0; max-width: none; font-size: 0.72rem; }
    .key.wide { min-width: 44px; max-width: 58px; }
    .logo h1 { font-size: 1.55rem; }
    .tagline { font-size: 0.62rem; }
}