/* ── TOKENS ── */
:root {
    --ud-yellow:   #FFCC00;
    --ud-black:    #1D1D1D;
    --ud-white:    #FFFFFF;
    --ud-gray-bg:  #F5F5F5;
    --ud-gray-mid: #9C9C9C;
    --ud-gray-dk:  #3D3D3D;
    --ud-border:   #CCCCCC;
    --ud-green:    #5A9E46;
    --ud-yellow-tile: #C9A227;
    --ud-empty:    #E0E0E0;
    --ud-empty-dark:#6C6C6C;
    --tile-size: 62px;
    --tile-gap: 6px;
    --font-main: 'Arial', 'Helvetica Neue', sans-serif;
}

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

body {
    background: var(--ud-gray-bg);
    font-family: var(--font-main), serif;
    color: var(--ud-black);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── HEADER ── */
header {
    background: #212936;
    border-bottom: 3px solid #212936;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 58px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}
.header-logo {
    height: 46px;
    width: auto;
    display: block;
}
@media (max-width: 480px) {
    .header-logo { height: 34px; }
}
nav {
    display: flex;
    align-items: center;
    gap: 12px;
}
nav a {
    font-size: 13px;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 20px;
    background: transparent;
    transition: background 0.15s;
}
nav a:hover { background: rgba(255,255,255,0.12); }
.nav-play {
    background: #EFFF00 !important;
    color: #212936 !important;
}

/* ── MAIN LAYOUT ── */
main {
    flex: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: 24px 16px 40px;
    width: 100%;
}

/* ── WORD DEFINITION CARD (UD style) ── */
.word-card {
    background: var(--ud-white);
    border: 2px solid var(--ud-border);
    border-radius: 8px;
    padding: 18px 20px 14px;
    margin-bottom: 20px;
}
.word-card h1 {
    font-size: 28px;
    font-weight: 900;
    color: var(--ud-black);
    margin-bottom: 2px;
}
.word-card .tagline {
    font-size: 13px;
    color: var(--ud-gray-mid);
    margin-bottom: 10px;
}
.word-card .definition {
    font-size: 15px;
    color: var(--ud-gray-dk);
    line-height: 1.5;
    border-top: 1px solid var(--ud-border);
    padding-top: 10px;
}
.word-card .definition strong {
    color: var(--ud-black);
}

/* ── LEGEND ── */
.legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 12px;
    justify-content: center;
}
.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    color: var(--ud-gray-dk);
}
.legend-tile {
    width: 22px;
    height: 22px;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 900;
    color: white;
}
.lt-green  { background: var(--ud-green); }
.lt-yellow { background: var(--ud-yellow-tile); }
.lt-gray   { background: var(--ud-gray-mid); }

/* ── BOARD ── */
#board {
    display: grid;
    grid-template-rows: repeat(6, var(--tile-size));
    gap: var(--tile-gap);
    width: fit-content;
    margin: 0 auto 24px;
}
.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(--ud-border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--ud-black);
    background: var(--ud-white);
    transition: border-color 0.1s;
    user-select: none;
    position: relative;
}
.tile.filled {
    border-color: var(--ud-gray-mid);
    animation: pop 0.08s ease;
}
.tile.correct {
    background: var(--ud-green);
    border-color: var(--ud-green);
    color: white;
}
.tile.present {
    background: var(--ud-yellow-tile);
    border-color: var(--ud-yellow-tile);
    color: white;
}
.tile.absent {
    background: var(--ud-gray-mid);
    border-color: var(--ud-gray-mid);
    color: white;
}
.tile.flip {
    animation: flip 0.5s ease forwards;
}

@keyframes pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.1); }
    100% { transform: scale(1); }
}
@keyframes flip {
    0%   { transform: rotateX(0deg); }
    50%  { transform: rotateX(-90deg); }
    100% { transform: rotateX(0deg); }
}
@keyframes shake {
    0%,100% { transform: translateX(0); }
    20%     { transform: translateX(-6px); }
    40%     { transform: translateX(6px); }
    60%     { transform: translateX(-4px); }
    80%     { transform: translateX(4px); }
}
.row.shake { animation: shake 0.4s ease; }

/* ── MESSAGE TOAST ── */
#toast {
    position: fixed;
    top: 76px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: var(--ud-black);
    color: #EFFF00;
    font-weight: 900;
    font-size: 15px;
    padding: 10px 20px;
    border-radius: 6px;
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
    z-index: 999;
    text-align: center;
    max-width: 280px;
    white-space: nowrap;
}
#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── KEYBOARD ── */
#keyboard {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 500px;
    margin: 0 auto;
}
.kb-row {
    display: flex;
    justify-content: center;
    gap: 6px;
}
.key {
    height: 58px;
    min-width: 43px;
    padding: 0 6px;
    border: none;
    border-radius: 5px;
    background: var(--ud-border);
    color: var(--ud-black);
    font-size: 14px;
    font-weight: 800;
    font-family: var(--font-main), serif;
    cursor: pointer;
    text-transform: uppercase;
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.key.wide { min-width: 66px; font-size: 12px; }
.key:active { opacity: 0.75; }
.key.correct {
    background: var(--ud-green);
    color: white;
}
.key.present {
    background: var(--ud-yellow-tile);
    color: white;
}
.key.absent {
    background: var(--ud-empty-dark);
    color: white;
}

/* ── RESULT SECTION ── */
#result-section {
    display: none;
    background: var(--ud-white);
    border: 2px solid var(--ud-border);
    border-radius: 8px;
    padding: 20px;
    margin-top: 24px;
    text-align: center;
}
#result-section h2 {
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 6px;
}
#result-section p {
    font-size: 14px;
    color: var(--ud-gray-mid);
}
#result-section .answer-reveal {
    font-size: 26px;
    font-weight: 900;
    color: var(--ud-black);
    background: #EFFF00;
    display: inline-block;
    padding: 4px 18px;
    border-radius: 4px;
    text-transform: uppercase;
    margin-bottom: 16px;
    letter-spacing: 3px;
}

#result-description {
    display: flex;
    margin-inline: 12px;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

#result-example {
    display: flex;
    margin-inline: 12px;
    align-items: center;
    justify-content: center;
    font-style: italic;
    margin-bottom: 15px;
}

.btn-ud-link {
    display: none; /* Toggled to inline-block by script.js */
    background: #EFFF00;
    color: var(--ud-black);
    text-decoration: none;
    padding: 12px 28px;
    border-radius: 6px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 15px;
    transition: opacity 0.15s;
}

.btn-ud-link:hover {
    opacity: 0.85;
}

.btn-share {
    background: var(--ud-black);
    color: #EFFF00;
    border: none;
    border-radius: 6px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 900;
    font-family: var(--font-main), serif;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: opacity 0.15s;
    margin-top: 16px;
}
.btn-share:hover { opacity: 0.85; }

/* ── FOOTER ── */
footer {
    background: var(--ud-black);
    color: var(--ud-gray-mid);
    text-align: center;
    font-size: 12px;
    padding: 14px 20px;
}
footer a { color: #EFFF00; text-decoration: none; }

/* ── LOADING ── */
#loading {
    text-align: center;
    padding: 40px;
    color: var(--ud-gray-mid);
    font-weight: 700;
    font-size: 16px;
}

/* ── RESPONSIVE ── */
@media (max-width: 480px) {
    :root {
        --tile-size: 52px;
    }
    .key { height: 50px; min-width: 33px; font-size: 12px; }
    .key.wide { min-width: 50px; }
    header { height: 50px; }
    .logo-text { font-size: 15px; }
    nav a { font-size: 12px; padding: 5px 8px; }
}