/* ==========================================================================
   Sudoku Puzzle Specific Stylesheet
   Harmonisches, nahtloses Grid mit durchgehenden, unterbrechungsfreien Block-Linien
   ========================================================================== */

.sudoku-grid {
    display: grid !important;
    width: 100%;
    height: 100%;
    max-width: 440px;
    max-height: 440px;
    margin: 0 auto;
    aspect-ratio: 1 / 1;
    gap: 0 !important;
    padding: 0 !important;
    background-color: var(--cell-bg);
    border: 2.5px solid var(--accent-sun) !important;
    border-radius: var(--radius-md) !important;
    overflow: visible !important;
    position: relative;
    box-shadow: 0 10px 30px var(--shadow-color);
    box-sizing: border-box;
}

body.theme-cyberpunk .sudoku-grid {
    border-color: #ff007f !important;
}

body.theme-amoled .sudoku-grid {
    border-color: rgba(255, 255, 255, 0.25) !important;
}

body.theme-wood .sudoku-grid {
    border-color: #78350f !important;
}

/* Alle Sudoku-Zellen: Reine mathematische Kacheln ohne Versatz/Artefakte */
.sudoku-cell {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--cell-bg);
    border-top: none !important;
    border-left: none !important;
    border-right: 1px solid rgba(255, 255, 255, 0.12) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    transform: none !important;
    font-weight: 700;
    cursor: pointer;
    box-sizing: border-box;
    transition: background-color 0.15s ease, color 0.15s ease;
    user-select: none;
    -webkit-user-select: none;
    min-width: 0 !important;
    min-height: 0 !important;
    overflow: hidden;
    aspect-ratio: 1 / 1;
}

body.theme-light .sudoku-cell {
    border-right: 1px solid rgba(0, 0, 0, 0.12) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.12) !important;
}

body.theme-cyberpunk .sudoku-cell {
    border-right: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
}

.sudoku-cell:active:not(.locked) {
    transform: none !important;
    filter: brightness(1.2);
}

/* Letzte Spalte & letzte Zeile: Kein rechter/unterer Innenrand am Außenrahmen */
.sudoku-grid.size-4 .sudoku-cell[data-c="3"],
.sudoku-grid.size-6 .sudoku-cell[data-c="5"],
.sudoku-grid.size-9 .sudoku-cell[data-c="8"],
.sudoku-grid.size-16 .sudoku-cell[data-c="15"] {
    border-right: none !important;
}

.sudoku-grid.size-4 .sudoku-cell[data-r="3"],
.sudoku-grid.size-6 .sudoku-cell[data-r="5"],
.sudoku-grid.size-9 .sudoku-cell[data-r="8"],
.sudoku-grid.size-16 .sudoku-cell[data-r="15"] {
    border-bottom: none !important;
}

/* Perfektes Einpassen der 4 äußersten Eckzellen an die abgerundete Spielfeldumrandung */
.sudoku-grid .sudoku-cell[data-r="0"][data-c="0"] {
    border-top-left-radius: calc(var(--radius-md) - 2px) !important;
}

.sudoku-grid.size-4 .sudoku-cell[data-r="0"][data-c="3"],
.sudoku-grid.size-6 .sudoku-cell[data-r="0"][data-c="5"],
.sudoku-grid.size-9 .sudoku-cell[data-r="0"][data-c="8"],
.sudoku-grid.size-16 .sudoku-cell[data-r="0"][data-c="15"] {
    border-top-right-radius: calc(var(--radius-md) - 2px) !important;
}

.sudoku-grid.size-4 .sudoku-cell[data-r="3"][data-c="0"],
.sudoku-grid.size-6 .sudoku-cell[data-r="5"][data-c="0"],
.sudoku-grid.size-9 .sudoku-cell[data-r="8"][data-c="0"],
.sudoku-grid.size-16 .sudoku-cell[data-r="15"][data-c="0"] {
    border-bottom-left-radius: calc(var(--radius-md) - 2px) !important;
}

.sudoku-grid.size-4 .sudoku-cell[data-r="3"][data-c="3"],
.sudoku-grid.size-6 .sudoku-cell[data-r="5"][data-c="5"],
.sudoku-grid.size-9 .sudoku-cell[data-r="8"][data-c="8"],
.sudoku-grid.size-16 .sudoku-cell[data-r="15"][data-c="15"] {
    border-bottom-right-radius: calc(var(--radius-md) - 2px) !important;
}

/* Ausschließlich die Kammer-Blocktrenner (2x2, 3x3, 4x4) sind auffällige Linien */
.sudoku-cell.box-edge-right {
    border-right: 2.5px solid var(--accent-sun) !important;
}

.sudoku-cell.box-edge-bottom {
    border-bottom: 2.5px solid var(--accent-sun) !important;
}

body.theme-cyberpunk .sudoku-cell.box-edge-right {
    border-right-color: #ff007f !important;
}

body.theme-cyberpunk .sudoku-cell.box-edge-bottom {
    border-bottom-color: #ff007f !important;
}

body.theme-amoled .sudoku-cell.box-edge-right {
    border-right-color: rgba(255, 255, 255, 0.3) !important;
}

body.theme-amoled .sudoku-cell.box-edge-bottom {
    border-bottom-color: rgba(255, 255, 255, 0.3) !important;
}

body.theme-wood .sudoku-cell.box-edge-right {
    border-right-color: #92400e !important;
}

body.theme-wood .sudoku-cell.box-edge-bottom {
    border-bottom-color: #92400e !important;
}

/* Schriftgrößen nach Gittergröße */
.sudoku-grid.size-4 .val-digit { font-size: 2.4rem; }
.sudoku-grid.size-9 .val-digit { font-size: 1.55rem; }
.sudoku-grid.size-16 .val-digit { font-size: 0.95rem; }

/* Ziffernfarben & Typografie */
.sudoku-cell .icon-digit {
    color: var(--text-primary);
    line-height: 1;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, monospace;
    font-weight: 700;
}

.sudoku-cell.locked {
    background-color: var(--cell-locked-bg) !important;
}

.sudoku-cell.locked .icon-digit {
    font-weight: 900;
    color: var(--accent-moon);
}

body.theme-cyberpunk .sudoku-cell.locked .icon-digit {
    color: #00f0ff;
    text-shadow: 0 0 6px rgba(0, 240, 255, 0.6);
}

/* Harmonische Feld-Hervorhebungen */
.sudoku-grid .sudoku-cell.peer-highlight {
    background-color: rgba(56, 189, 248, 0.08) !important;
}

body.theme-light .sudoku-grid .sudoku-cell.peer-highlight {
    background-color: rgba(2, 132, 199, 0.07) !important;
}

.sudoku-grid .sudoku-cell.same-value-highlight {
    background-color: rgba(251, 191, 36, 0.22) !important;
}

.sudoku-grid .sudoku-cell.selected {
    background-color: rgba(251, 191, 36, 0.35) !important;
    box-shadow: inset 0 0 0 2px var(--accent-sun) !important;
    z-index: 2;
}

/* Blende die Zellenumrandung der vergrößerten Zelle komplett aus */
.sudoku-grid .sudoku-cell.cell-zoom {
    border: none !important;
    border-right: none !important;
    border-bottom: none !important;
}

.sudoku-grid .sudoku-cell.selected.cell-zoom {
    transform: scale(var(--zoom-factor, 1.5)) !important;
    z-index: 20 !important;
    border: none !important;
    outline: 2.5px solid var(--accent-sun) !important;
    outline-offset: -1px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 14px rgba(251, 191, 36, 0.45) !important;
    border-radius: var(--radius-sm) !important;
    transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.15s ease, background-color 0.15s ease;
}

body.theme-cyberpunk .sudoku-grid .sudoku-cell.selected {
    background-color: rgba(0, 240, 255, 0.25) !important;
    box-shadow: inset 0 0 0 2px #00f0ff !important;
}

body.theme-cyberpunk .sudoku-grid .sudoku-cell.selected.cell-zoom {
    outline-color: #00f0ff !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), 0 0 16px rgba(0, 240, 255, 0.6) !important;
}

body.theme-amoled .sudoku-grid .sudoku-cell.selected.cell-zoom {
    outline-color: #facc15 !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.8) !important;
}

body.theme-wood .sudoku-grid .sudoku-cell.selected.cell-zoom {
    outline-color: #fbbf24 !important;
    box-shadow: 0 8px 24px rgba(20, 10, 5, 0.6) !important;
}

.sudoku-grid .sudoku-cell.conflict {
    background-color: rgba(239, 68, 68, 0.25) !important;
}

.sudoku-grid .sudoku-cell.conflict .icon-digit {
    color: #ef4444;
}

/* Notizen-Gitter in Zellen */
.sudoku-note-grid {
    display: grid;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    pointer-events: none;
    align-items: center;
    justify-items: center;
    gap: 1px;
    padding: 2px;
    box-sizing: border-box;
}

.sudoku-note-grid.grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(2, minmax(0, 1fr));
}

.sudoku-note-grid.grid-9 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
}

.sudoku-note-grid.grid-16 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(4, minmax(0, 1fr));
}

.note-digit {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1;
    font-family: monospace;
    user-select: none;
}

.sudoku-grid.size-4 .note-digit { font-size: clamp(0.6rem, 2.2vw, 0.95rem); }
.sudoku-grid.size-9 .note-digit { font-size: clamp(0.4rem, 1.4vw, 0.65rem); }
.sudoku-grid.size-16 .note-digit { font-size: clamp(0.25rem, 0.9vw, 0.42rem); }

/* Sudoku Zahlenpad */
.sudoku-keypad {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    width: 100%;
    max-width: 480px;
    margin: 8px auto;
    padding: 0 4px;
}

.sudoku-key {
    flex: 1;
    min-width: 0;
    height: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--cell-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 700;
    position: relative;
    transition: transform 0.1s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.sudoku-key:active {
    transform: scale(0.92);
}

.sudoku-key.completed-digit {
    opacity: 0.3;
    pointer-events: none;
}

.sudoku-key .key-digit {
    font-size: 1.15rem;
    line-height: 1;
    font-weight: 800;
}

.sudoku-key .key-remaining {
    font-size: 0.65rem;
    color: var(--text-secondary);
    line-height: 1;
    margin-top: 2px;
}

.sudoku-key.key-clear {
    background-color: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* 16x16 Hex Keypad Layout (2 Zeilen) */
.sudoku-keypad.keypad-hex-layout {
    flex-direction: column;
    gap: 4px;
    padding: 0;
}

.keypad-hex-row {
    display: flex;
    width: 100%;
    gap: 4px;
    justify-content: center;
}

.keypad-hex-row .sudoku-key {
    height: 38px;
    border-radius: 4px;
}

.keypad-hex-row .sudoku-key .key-digit {
    font-size: 0.95rem;
}

.keypad-hex-row .sudoku-key .key-remaining {
    font-size: 0.55rem;
}