/* Layout-only theme: puzzle generation and input rules remain in sudoku.html. */
.sudoku-page {
    margin: 0;
    background: radial-gradient(ellipse at top, #3a2e18, #1a1409 70%);
    color: #f5f1e2;
}

.sudoku-page .sudoku-page-main {
    width: 100%;
    max-width: none;
    padding: max(clamp(12px, 2vw, 28px), env(safe-area-inset-top)) max(clamp(12px, 2vw, 28px), env(safe-area-inset-right)) max(clamp(12px, 2vw, 28px), env(safe-area-inset-bottom)) max(clamp(12px, 2vw, 28px), env(safe-area-inset-left));
}

.sudoku-view {
    --sudoku-board-size: min(100%, max(360px, calc(100vh - 164px)), 860px);
    --game-toolbar-bg: #1a1409;
    min-width: 0;
}

@supports (height: 100dvh) {
    .sudoku-view { --sudoku-board-size: min(100%, max(360px, calc(100dvh - 164px)), 860px); }
}

.sudoku-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: clamp(12px, 2vh, 24px);
}

.sudoku-title { min-width: 0; }
.sudoku-title h1 {
    margin: 0;
    color: #e6c760;
    font-size: clamp(1.65rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.15;
    text-shadow: 0 0 14px #d4af3740;
}
.sudoku-title p {
    margin: 6px 0 0;
    color: #f5f1e2b8;
    font-size: 0.95rem;
}
.sudoku-view-actions { flex-shrink: 0; text-align: right; }
.sudoku-view .game-fullscreen { color: #f5f1e2; border-color: #d4af3770; }
.sudoku-view .game-view-status { color: #f5f1e2b8; }

.sudoku-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 370px);
    align-items: start;
    gap: clamp(16px, 3vw, 44px);
    width: 100%;
    max-width: 1360px;
    margin-inline: auto;
}
.sudoku-board-stage { display: grid; justify-items: center; min-width: 0; }
.sudoku-board-frame {
    box-sizing: border-box;
    width: var(--sudoku-board-size);
    padding: clamp(6px, 1.1vw, 16px);
    border: 2px solid #d4af37;
    border-radius: 12px;
    background: #f5f1e2;
    box-shadow: 0 14px 48px #0005, 0 0 40px #d4af3714;
}
#sudoku-board {
    display: grid;
    grid-template-columns: repeat(9, minmax(0, 1fr));
    grid-template-rows: repeat(9, minmax(0, 1fr));
    width: 100%;
    height: auto;
    aspect-ratio: 1;
    container-type: inline-size;
    color: #1a1409;
    background: #fffdf6;
    text-shadow: none;
    touch-action: manipulation;
}
/* Keep puzzle digits aligned even when the decorative title uses serif text. */
#sudoku-board .cell-value,
#sudoku-board .cell-hints,
#sudoku-board .hint-number,
.sudoku-keypad .num-btn {
    font-family: Arial, Helvetica, sans-serif;
    font-variant-numeric: lining-nums tabular-nums;
    font-feature-settings: "lnum" 1, "tnum" 1;
    line-height: 1;
}
#sudoku-board .cell-value {
    font-size: clamp(1.25rem, 3vw, 2.7rem);
    font-size: clamp(1.15rem, 6cqi, 3rem);
}
#sudoku-board .cell-hints {
    font-size: clamp(9px, 1.5vw, 16px);
    font-size: clamp(9px, 2.35cqi, 18px);
    color: #6b5834;
}
#sudoku-board .cell-hover:hover { transform: none; }

.sudoku-controls {
    box-sizing: border-box;
    display: grid;
    gap: 16px;
    min-width: 0;
    padding: 20px;
    border: 1px solid #d4af3780;
    border-radius: 12px;
    color: #1a1409;
    background: #f5f1e2;
    box-shadow: 0 12px 36px #0004;
    text-shadow: none;
}
.sudoku-controls-heading {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    text-align: center;
}
.sudoku-keypad {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
}
.sudoku-controls button {
    box-sizing: border-box;
    min-width: 0;
    min-height: 44px;
    padding: 8px 6px;
    border: 1px solid #a8822b45;
    border-radius: 7px;
    color: #1a1409;
    background-color: #d4af3726;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.25;
    cursor: pointer;
    touch-action: manipulation;
}
.sudoku-controls button:hover { background-color: #d4af3750; }
.sudoku-controls button:focus-visible,
.sudoku-toolbar button:focus-visible {
    outline: 3px solid #b98809;
    outline-offset: 2px;
}
.sudoku-keypad .num-btn { min-height: 48px; font-size: 1.4rem; }
.sudoku-keypad #clear-btn { background: #efe0d6; font-size: 0.85rem; }
.sudoku-keypad #clear-btn .fa { display: block; margin-bottom: 3px; }
.sudoku-difficulty { display: flex; align-items: center; gap: 10px; }
.sudoku-difficulty > span { flex-shrink: 0; font-weight: 600; }
.sudoku-difficulty-buttons { display: flex; flex: 1; gap: 6px; min-width: 0; }
.sudoku-difficulty-buttons button { flex: 1; }
.sudoku-controls .difficulty-btn.active { border-color: #937018; background: #d4af3760; }
.sudoku-status {
    padding: 10px 12px;
    border: 1px solid #d4af3745;
    border-radius: 8px;
    background: #3a2e180c;
    overflow-wrap: anywhere;
}
.sudoku-status h3 { margin: 0 0 4px; font-size: 0.8rem; color: #78623d; }
.sudoku-status p { margin: 0; font-size: 0.95rem; line-height: 1.45; }
.sudoku-tools { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.sudoku-tools button { display: flex; justify-content: center; align-items: center; gap: 6px; }
.sudoku-controls #toggle-hints[class~="bg-gold/40"] { background: #d4af3760; }
.sudoku-tools .sudoku-primary { background: #d4af37; }
.sudoku-tools .sudoku-secondary { color: #f5f1e2; background: #3a2e18; }
.sudoku-tools .sudoku-secondary:hover { background: #1a1409; }
.sudoku-tools #hint-legend { grid-column: 1 / -1; margin: 0; font-size: 0.8rem; line-height: 1.45; color: #6b5834; }
.sudoku-tools #show-rules { grid-column: 1 / -1; background: transparent; }

.sudoku-modal {
    box-sizing: border-box;
    padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    overflow-y: auto;
    overscroll-behavior: contain;
}
.sudoku-modal > div {
    max-height: calc(100vh - 32px);
    max-height: calc(100dvh - 32px);
    overflow-y: auto;
    margin: auto;
    text-shadow: none;
}
.sudoku-modal button { min-height: 44px; }
.sudoku-modal #close-rules { min-width: 44px; }
.sudoku-footer { padding: 0 16px 18px; text-align: center; font-size: 0.8rem; color: #f5f1e280; }
.sudoku-view.is-expanded { background: #1a1409; }
.sudoku-view.is-expanded .sudoku-toolbar { background: #1a1409; }

@media (max-width: 959px) {
    .sudoku-page .sudoku-page-main {
        padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    }
    .sudoku-title p { display: none; }
    .sudoku-toolbar { gap: 8px; margin-bottom: 12px; }
    .sudoku-title h1 { font-size: 1.6rem; }
    .sudoku-layout { grid-template-columns: minmax(0, 1fr); gap: 12px; }
    .sudoku-board-frame { width: min(100%, 580px); padding: 6px; }
    .sudoku-controls { width: 100%; max-width: 580px; margin-inline: auto; padding: 12px; gap: 12px; }
    .sudoku-controls-heading { display: none; }
}

/* Short landscape: a readable square beside the touch keypad. Scroll the
   controls instead of shrinking nine rows and all buttons into tiny targets. */
@media (orientation: landscape) and (min-width: 560px) and (max-height: 600px) {
    .sudoku-view { --sudoku-short-height: calc(100vh - 60px - max(8px, env(safe-area-inset-top)) - max(8px, env(safe-area-inset-bottom))); }
    .sudoku-view.is-expanded {
        --sudoku-short-height: calc(100vh - 52px - max(16px, env(safe-area-inset-top)) - max(16px, env(safe-area-inset-bottom)));
    }
    @supports (height: 100dvh) {
        .sudoku-view { --sudoku-short-height: calc(100dvh - 60px - max(8px, env(safe-area-inset-top)) - max(8px, env(safe-area-inset-bottom))); }
        .sudoku-view.is-expanded {
            --sudoku-short-height: calc(100dvh - 52px - max(16px, env(safe-area-inset-top)) - max(16px, env(safe-area-inset-bottom)));
        }
    }
    .sudoku-page .sudoku-page-main {
        padding: max(8px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    }
    .sudoku-toolbar { margin-bottom: 8px; gap: 8px; }
    .sudoku-title h1 { font-size: 1.45rem; }
    .sudoku-title p { display: none; }
    .sudoku-layout {
        grid-template-columns: minmax(252px, min(var(--sudoku-short-height), 54%)) minmax(0, 1fr);
        align-items: start;
        gap: 12px;
        max-width: 1120px;
    }
    .sudoku-board-frame { width: 100%; padding: 4px; border-radius: 8px; }
    .sudoku-controls {
        width: 100%;
        max-width: none;
        max-height: var(--sudoku-short-height);
        overflow-y: auto;
        overscroll-behavior: contain;
        scrollbar-gutter: stable;
        padding: 10px;
        gap: 10px;
    }
    .sudoku-controls-heading { display: none; }
    .sudoku-keypad { gap: 4px; }
    .sudoku-keypad .num-btn { min-height: 44px; }
    .sudoku-difficulty { gap: 6px; }
    .sudoku-difficulty-buttons { gap: 4px; }
    .sudoku-difficulty > span { font-size: 0.8rem; }
    .sudoku-status { padding: 7px 9px; }
    .sudoku-footer { padding-block: 8px; }
    .sudoku-modal > div { padding: 16px; }
}

@media (orientation: landscape) and (min-width: 560px) and (max-width: 619px) and (max-height: 600px) {
    .sudoku-keypad { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sudoku-keypad #clear-btn { grid-column: 1 / -1; }
    .sudoku-keypad #clear-btn .fa { display: inline; margin-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
    .sudoku-view *, .sudoku-view *::before, .sudoku-view *::after {
        animation: none !important;
        transition: none !important;
    }
}

/* One-screen play area. Only the control panel (and a very short board stage)
   scrolls; the puzzle and its input remain together when the viewport changes. */
.sudoku-page .sudoku-page-main {
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    padding: max(8px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(8px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    display: flex;
}
.sudoku-view {
    display: flex;
    flex: 1;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}
.sudoku-toolbar { flex: 0 0 auto; min-height: 44px; margin-bottom: 8px; }
.sudoku-title h1 { font-size: clamp(1.45rem, 2.5vw, 2rem); }
.sudoku-title p { margin-top: 3px; font-size: 0.85rem; }
.sudoku-layout {
    flex: 1;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 370px);
    min-height: 0;
    align-items: stretch;
    gap: 16px;
}
.sudoku-board-stage {
    min-height: 0;
    overflow: auto;
    overscroll-behavior: contain;
    container-type: size;
    align-content: center;
}
.sudoku-board-frame {
    width: min(100%, max(252px, calc(100vh - 112px)), 860px);
    width: min(100cqw, max(252px, 100cqh), 860px);
    padding: 6px;
}
.sudoku-controls {
    min-height: 0;
    max-height: 100%;
    overflow-y: auto;
    overscroll-behavior: contain;
    align-content: start;
    padding: 14px;
    gap: 10px;
}
.sudoku-footer { display: none; }
@media (max-width: 959px) and (orientation: portrait) {
    .sudoku-layout {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: minmax(252px, min(calc(100vw - 24px), calc(100dvh - 280px))) minmax(0, 1fr);
        gap: 8px;
    }
    .sudoku-controls { max-width: 580px; padding: 8px; gap: 6px; }
    .sudoku-keypad { gap: 4px; }
    .sudoku-keypad .num-btn { min-height: 44px; }
    .sudoku-status { padding: 5px 8px; }
    .sudoku-status h3 { display: none; }
    .sudoku-status p { font-size: 0.85rem; }
    .sudoku-tools { gap: 4px; }
    .sudoku-tools #hint-legend { font-size: 0.75rem; }
}
@media (orientation: landscape) and (min-width: 560px) and (max-height: 600px) {
    .sudoku-layout {
        grid-template-columns: minmax(252px, min(var(--sudoku-short-height), 54%)) minmax(0, 1fr);
        gap: 12px;
    }
    .sudoku-board-stage { align-content: start; }
    .sudoku-controls { max-height: 100%; padding: 8px; gap: 6px; }
}