button#randomizeButton {
    width: 100%;
    padding: clamp(10px, 2vh, 18px) clamp(12px, 2vw, 20px);
    border: 0;
    border-radius: 8px;
    margin-bottom: clamp(8px, 1.5vh, 14px);
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    cursor: pointer;
    background: #2ecc40;
    color: #fff;
    transition: background 0.2s ease, opacity 0.2s;
}
button#randomizeButton:hover {
    background: #27ae38;
    opacity: 0.95;
}
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    height: 100vh;
    width: 100vw;
    font-family: Arial, sans-serif;
    background: radial-gradient(circle at top, #0a2a4b 0%, #02111f 60%);
    color: #f7f7f7;
    overflow: hidden;
}

.app-shell {
    width: 100vw;
    height: 100vh;
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* =========================================
   MAIN MENU & SETTINGS SCREENS
   ========================================= */
.menu-screen {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at top, #0a2a4b 0%, #02111f 60%);
}

.menu-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(12px, 2vh, 20px);
    padding: clamp(20px, 4vh, 40px);
    max-width: 500px;
    width: 90%;
}

.menu-title {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 700;
    color: #78c6ff;
    text-shadow: 0 2px 10px rgba(120, 198, 255, 0.5);
    text-align: center;
    margin-bottom: clamp(10px, 2vh, 20px);
    line-height: 1.2;
}

.menu-button {
    width: 100%;
    padding: clamp(14px, 2.5vh, 22px) clamp(20px, 3vw, 30px);
    border: none;
    border-radius: 12px;
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 600;
    cursor: pointer;
    background: linear-gradient(135deg, #1c4d8a 0%, #2563a8 100%);
    color: #fff;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(28, 77, 138, 0.4);
}

.menu-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(28, 77, 138, 0.6);
}

.menu-button.scan-highlight {
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: 3px;
    box-shadow: 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent) !important;
    transform: scale(1.02);
}

.settings-container {
    max-width: 600px;
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(8px, 1.5vh, 14px);
    width: 100%;
    margin-bottom: clamp(10px, 2vh, 20px);
}

.setting-btn {
    font-size: clamp(0.85rem, 2vw, 1.1rem);
    padding: clamp(10px, 2vh, 16px) clamp(12px, 2vw, 20px);
}

.back-btn {
    background: linear-gradient(135deg, #6c5ce7 0%, #5b4cdb 100%);
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
    margin-top: clamp(5px, 1vh, 10px);
}

.back-btn:hover {
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.6);
}

/* Game Screen */
.game-screen {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

header {
    display: none;
}

.game-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: clamp(4px, 0.8vh, 8px) clamp(12px, 2vw, 24px);
    background: rgba(0, 0, 0, 0.3);
    flex-shrink: 0;
}

.game-title {
    margin: 0;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 700;
    color: #78c6ff;
    text-shadow: 0 2px 8px rgba(120, 198, 255, 0.4);
    letter-spacing: 1px;
}

.turn-indicator {
    margin-top: clamp(2px, 0.5vh, 6px);
    font-size: clamp(0.8rem, 1.8vw, 1rem);
    font-weight: 600;
    padding: clamp(3px, 0.5vh, 6px) clamp(10px, 1.5vw, 16px);
    border-radius: 20px;
    min-height: 1.2em;
}

.turn-indicator.player-turn {
    background: rgba(46, 204, 64, 0.2);
    color: #2ecc40;
    border: 1px solid rgba(46, 204, 64, 0.4);
}

.turn-indicator.enemy-turn {
    background: rgba(242, 80, 66, 0.2);
    color: #f25042;
    border: 1px solid rgba(242, 80, 66, 0.4);
}

header h1 {
    margin: 0;
    font-size: 1.4rem;
}

header p {
    margin: 4px auto 0;
    max-width: 760px;
    color: #c8d8f0;
    font-size: 0.85rem;
}

.game-layout {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    overflow: hidden;
    min-height: 0;
    width: 100%;
    height: 100%;
}

.board-column {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 0;
    width: 100%;
    height: 100%;
}

/* grid-grid styles defined below */

.grid-label:first-child {
    background: transparent;
}
.ship-selector h2 {
    margin-top: 0;
    font-size: 1.2rem;
}

/* Combat log removed: styles cleaned up */

.ship-list {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 14px;
    padding: clamp(16px, 3vw, 30px);
    width: clamp(320px, 60vw, 600px);
    margin: 0 auto;
    box-shadow: 0 14px 30px rgba(0,0,0,0.25);
    display: grid;
    gap: clamp(10px, 2vh, 18px);
    margin-bottom: clamp(14px, 2vh, 24px);
}

.ship-button {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: clamp(12px, 2.5vh, 24px) clamp(14px, 2.5vw, 28px);
    border: 1px solid rgba(255,255,255,0.16);
    border-radius: 10px;
    background: rgba(255,255,255,0.04);
    color: #f7f7f7;
    cursor: pointer;
    font-size: clamp(0.9rem, 2vw, 1.3rem);
    transition: background 0.2s ease, transform 0.1s ease;
}

.ship-button:hover {
    background: rgba(255,255,255,0.12);
}

.ship-button.selected {
    border-color: #78c6ff;
    background: rgba(120,198,255,0.14);
}

.ship-button.placed {
    border-color: #4caf50;
    background: rgba(76,175,80,0.16);
    color: #d7f8d7;
}

.ship-button .ship-size {
    color: #a6c9ff;
    font-size: clamp(0.75rem, 1.5vw, 0.95rem);
}

/* Ship graphical representation */
.ship-button {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: clamp(8px, 1.5vh, 14px);
}

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

.ship-name {
    font-weight: 600;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
}

.ship-graphic {
    display: flex;
    gap: 3px;
    justify-content: center;
    transition: all 0.2s ease;
}

.ship-graphic.vertical {
    flex-direction: column;
    align-items: center;
}

.ship-cell {
    width: clamp(20px, 4vw, 36px);
    height: clamp(20px, 4vw, 36px);
    background: #4b95f3;
    border-radius: 4px;
    border: 2px solid #78c6ff;
    box-shadow: inset 0 0 8px rgba(255,255,255,0.2);
}

.ship-button.placed .ship-cell {
    background: #4caf50;
    border-color: #81c784;
}

.ship-button.selected .ship-cell {
    background: #64b5f6;
    border-color: #90caf9;
    box-shadow: 0 0 10px rgba(120,198,255,0.5);
}

/* Center ship selector */
.ship-selector {
    text-align: center;
}

.ship-selector h2 {
    margin-bottom: clamp(16px, 3vh, 28px);
    font-size: clamp(1.4rem, 3.5vw, 2.2rem);
}

button#resetButton {
    width: 100%;
    padding: clamp(10px, 2vh, 18px) clamp(12px, 2vw, 20px);
    border: 0;
    border-radius: 8px;
    margin-bottom: clamp(8px, 1.5vh, 14px);
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    cursor: pointer;
    background: #d23f52;
    color: #fff;
}

button#resetButton:hover {
    opacity: 0.95;
}

.status {
    color: #cbd8fc;
    margin-top: clamp(6px, 1vh, 12px);
    min-height: 1.5rem;
    font-size: clamp(0.8rem, 1.6vw, 1rem);
    padding: clamp(8px, 1vh, 12px) clamp(12px, 2vw, 20px);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.status.scan-highlight {
    background: color-mix(in srgb, var(--scan-highlight-color, #ffd700) 25%, transparent);
    outline: 3px solid var(--scan-highlight-color, #ffd700);
    color: var(--scan-highlight-color, #ffd700);
    font-weight: 600;
}

.boards {
    display: flex;
    justify-content: center;
    gap: 28px;
    flex-wrap: wrap;
}

.board-card {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: clamp(8px, 1.5vh, 16px);
    box-shadow: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: visible;
    width: 100%;
    height: 100%;
}

.board-card h2 {
    margin: 0 0 10px;
    font-size: 1.1rem;
    text-align: center;
}

.grid-grid {
    --cell-width: calc((100vw - 40px) / 11);
    --cell-height: calc((100vh - 160px) / 11);
    display: grid;
    grid-template-columns: repeat(11, 1fr);
    grid-template-rows: repeat(11, 1fr);
    gap: 3px;
    width: calc(100vw - 40px);
    height: calc(100vh - 160px);
    max-width: 95vw;
    max-height: calc(100vh - 140px);
    margin: 0 auto;
    flex-shrink: 0;
}

.grid-cell,
.grid-label {
    width: 100%;
    height: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(0.7rem, 2vw, 1.4rem);
}

.grid-label {
    color: #7ea4ff;
    font-weight: 600;
}

.grid-cell {
    position: relative;
    border-radius: 8px;
    background: rgba(255,255,255,0.08);
    cursor: pointer;
    transition: transform 0.1s ease, background 0.2s ease;
}

.grid-cell:hover {
    transform: translateY(-1px);
    background: rgba(255,255,255,0.16);
}

.grid-cell.occupied {
    background: transparent;
    box-shadow: inset 0 0 0 4px #4b95f3 !important;
}

/* Player's ship sunk by enemy: muted red highlight */
.grid-cell.player-sunk {
    background: rgba(180, 60, 50, 0.25) !important;
    box-shadow: inset 0 0 0 4px rgba(180, 60, 50, 0.7) !important;
}

/* Enemy ship sunk by player: muted green highlight */
.grid-cell.enemy-sunk {
    background: rgba(46, 160, 64, 0.2) !important;
    box-shadow: inset 0 0 0 4px rgba(46, 160, 64, 0.6) !important;
}

/* Selected ship highlight during placement */
.grid-cell.selected-ship {
    box-shadow: inset 0 0 0 4px var(--scan-highlight-color, #ffd700), 0 0 15px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent) !important;
    background: color-mix(in srgb, var(--scan-highlight-color, #ffd700) 15%, transparent) !important;
}

/* Player ship hit: red X in top left via SVG (same size as green X) */
.grid-cell.player-hit {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 4L20 20M20 4L4 20' stroke='%23f25042' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 12% 12% !important;
    background-size: clamp(12px, 50%, 24px) clamp(12px, 50%, 24px) !important;
}

/* Enemy sunk styling handled in attack grid section below */

/* When both enemy hit player AND player hit enemy on same cell - red X top-left, green dot bottom-right */
.grid-cell.enemy-hit.player-hit:not(.enemy-sunk) {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 4L20 20M20 4L4 20' stroke='%23f25042' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 12% 12%,
        radial-gradient(circle at calc(100% - 18%) calc(100% - 18%), 
            #2ecc40 0, #2ecc40 clamp(6px, 22%, 11px), transparent clamp(6px, 22%, 11px)) !important;
    background-size: clamp(12px, 50%, 24px) clamp(12px, 50%, 24px), 100% 100% !important;
}

/* Player miss: white circle in bottom right */
.grid-cell.player-miss:not(.player-hit)::after {
    content: '';
    position: absolute;
    right: 12%;
    bottom: 12%;
    left: auto;
    top: auto;
    transform: none;
    width: 40%;
    height: 40%;
    max-width: 18px;
    max-height: 18px;
    border-radius: 50%;
    background: #ffffff;
    opacity: 0.95;
    z-index: 2;
}

/* When both enemy hit player AND player missed on same cell - red X top-left, white dot bottom-right */
.grid-cell.player-miss.player-hit {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 4L20 20M20 4L4 20' stroke='%23f25042' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 12% 12%,
        radial-gradient(circle at calc(100% - 18%) calc(100% - 18%), 
            #ffffff 0, #ffffff clamp(5px, 20%, 9px), transparent clamp(5px, 20%, 9px)) !important;
    background-size: clamp(12px, 50%, 24px) clamp(12px, 50%, 24px), 100% 100% !important;
}

.grid-cell.miss {
    background: rgba(255,255,255,0.16);
    box-shadow: none;
}

/* When a player's ship square is hit, prefer the red X marker and hide the blue outline */
/* keep ship outline even when hit; markers overlay the outline */

.grid-cell.disabled {
    cursor: default;
}

.grid-card-header {
    grid-column: 1 / -1;
    text-align: center;
    font-weight: 700;
    margin-bottom: 8px;
}

.attempt-count {
    margin-top: 14px;
    text-align: center;
    color: #d4e0ff;
}

@media (max-width: 960px) {
    .board-card,
    .ship-selector {
        width: 100%;
    }
}

/* Ship Selection Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: linear-gradient(135deg, #0d3a5c 0%, #061a2e 100%);
    border: 2px solid rgba(120, 198, 255, 0.4);
    border-radius: 16px;
    padding: clamp(24px, 4vw, 48px);
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(78, 150, 243, 0.2);
    max-width: 90vw;
    max-height: 90vh;
    overflow: auto;
}

.modal-content h3 {
    margin: 0 0 clamp(16px, 3vh, 28px);
    font-size: clamp(1.4rem, 4vw, 2.2rem);
    color: #78c6ff;
}

.modal-ship-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: clamp(20px, 4vh, 36px);
    min-height: clamp(40px, 8vh, 80px);
    transition: all 0.3s ease;
}

.modal-ship-preview .ship-graphic {
    gap: 4px;
}

.modal-ship-preview .ship-cell {
    width: clamp(30px, 6vw, 50px);
    height: clamp(30px, 6vw, 50px);
    background: #4b95f3;
    border-radius: 6px;
    border: 3px solid #78c6ff;
    box-shadow: inset 0 0 12px rgba(255,255,255,0.25), 0 0 15px rgba(78, 150, 243, 0.4);
}

.modal-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(10px, 2vw, 18px);
    justify-content: center;
}

.modal-btn {
    padding: clamp(12px, 2.5vh, 20px) clamp(20px, 4vw, 36px);
    border: none;
    border-radius: 10px;
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-btn.rotate-btn {
    background: #1c4d8a;
    color: #fff;
}

.modal-btn.rotate-btn:hover {
    background: #2563a8;
    transform: scale(1.05);
}

.modal-btn.confirm-btn {
    background: #2ecc40;
    color: #fff;
}

.modal-btn.confirm-btn:hover {
    background: #27ae38;
    transform: scale(1.05);
}

.modal-btn.cancel-btn {
    background: #d23f52;
    color: #fff;
}

.modal-btn.cancel-btn:hover {
    background: #b8334a;
    transform: scale(1.05);
}

.modal-btn.move-btn {
    background: #f39c12;
    color: #fff;
}

.modal-btn.move-btn:hover {
    background: #e67e22;
    transform: scale(1.05);
}

/* Ship Action Modal */
.ship-action-modal {
    min-width: clamp(280px, 50vw, 400px);
}

.ship-action-preview {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: clamp(20px, 4vh, 36px);
    min-height: clamp(40px, 8vh, 80px);
}

.ship-action-preview .ship-graphic {
    display: flex;
    gap: 4px;
}

.ship-action-preview .ship-graphic.vertical {
    flex-direction: column;
}

.ship-action-preview .ship-cell {
    width: clamp(28px, 5vw, 45px);
    height: clamp(28px, 5vw, 45px);
    background: #4b95f3;
    border-radius: 5px;
    border: 2px solid #78c6ff;
    box-shadow: 0 0 12px rgba(78, 150, 243, 0.5);
}

/* Game Over Modal */
.game-over-modal {
    min-width: clamp(300px, 60vw, 500px);
    animation: modalPop 0.4s ease-out;
}

@keyframes modalPop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.game-over-modal h2 {
    margin: 0 0 clamp(12px, 2vh, 20px);
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.game-over-modal h2:contains('Victory') {
    color: #2ecc40;
    text-shadow: 0 0 20px rgba(46, 204, 64, 0.6);
}

#gameOverTitle {
    color: #78c6ff;
    text-shadow: 0 0 20px rgba(120, 198, 255, 0.6);
}

#gameOverModal .game-over-modal:has(#gameOverTitle:contains('Victory')) #gameOverTitle {
    color: #2ecc40;
}

.game-over-modal p {
    margin: 0;
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    color: #c8d8f0;
}

/* Ship Controls - Combined Grid Interface */
.ship-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(6px, 1vh, 12px);
    margin-bottom: clamp(8px, 1.5vh, 14px);
    padding: clamp(8px, 1.5vw, 16px);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 10px;
}

.ship-cycler {
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 24px);
}

.cycle-btn {
    width: clamp(40px, 6vw, 60px);
    height: clamp(40px, 6vw, 60px);
    border: 2px solid #78c6ff;
    border-radius: 50%;
    background: rgba(120, 198, 255, 0.15);
    color: #78c6ff;
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s ease;
}

.cycle-btn:hover {
    background: rgba(120, 198, 255, 0.3);
    transform: scale(1.1);
}

.current-ship-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(8px, 1.5vh, 14px);
    min-width: clamp(150px, 30vw, 300px);
}

.current-ship-name {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 600;
    color: #78c6ff;
}

.current-ship-graphic {
    display: flex;
    gap: 4px;
    justify-content: center;
    transition: all 0.3s ease;
}

.current-ship-graphic.vertical {
    flex-direction: column;
}

.current-ship-graphic .ship-cell {
    width: clamp(24px, 4vw, 40px);
    height: clamp(24px, 4vw, 40px);
    background: #4b95f3;
    border-radius: 5px;
    border: 2px solid #78c6ff;
    box-shadow: 0 0 10px rgba(78, 150, 243, 0.4);
}

.placement-buttons {
    display: flex;
    gap: clamp(10px, 2vw, 20px);
    flex-wrap: wrap;
    justify-content: center;
}

.menu-buttons {
    display: flex;
    gap: clamp(10px, 2vw, 16px);
    justify-content: center;
    align-items: stretch;
    width: 100%;
    margin-top: clamp(8px, 1.5vh, 14px);
    overflow: visible;
    padding: 10px;
    margin: clamp(8px, 1.5vh, 14px) -10px 0 -10px;
}

.menu-buttons .action-btn,
.menu-buttons .start-game-btn {
    flex: 1;
    min-width: 0;
}

.action-btn {
    padding: clamp(10px, 1.5vh, 14px) clamp(14px, 2.5vw, 22px);
    border: none;
    border-radius: 8px;
    font-size: clamp(0.85rem, 1.8vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn.rotate-btn {
    background: #1c4d8a;
    color: #fff;
}

.action-btn.rotate-btn:hover {
    background: #2563a8;
}

.action-btn.randomize-btn {
    background: #6c5ce7;
    color: #fff;
}

.action-btn.randomize-btn:hover {
    background: #5b4cdb;
}

.start-game-btn {
    padding: clamp(10px, 1.5vh, 14px) clamp(16px, 2.5vw, 24px);
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #2ecc40 0%, #27ae60 100%);
    color: #fff;
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 15px rgba(46, 204, 64, 0.4);
}

.start-game-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 204, 64, 0.5);
}

.ship-controls.hidden {
    display: none;
}

.menu-buttons.hidden {
    display: none;
}

/* General hidden class */
.hidden {
    display: none !important;
}

/* Sunk Ship Toast */
.sunk-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: linear-gradient(135deg, #2ecc40 0%, #27ae60 100%);
    color: #fff;
    padding: clamp(16px, 3vh, 28px) clamp(28px, 5vw, 48px);
    border-radius: 12px;
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    font-weight: 700;
    text-align: center;
    box-shadow: 0 8px 32px rgba(46, 204, 64, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.sunk-toast.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.sunk-toast.enemy-sunk-toast {
    background: linear-gradient(135deg, #f25042 0%, #c0392b 100%);
    box-shadow: 0 8px 32px rgba(242, 80, 66, 0.5);
}

/* =========================================
   SCAN/SELECT ACCESSIBILITY STYLES
   ========================================= */

/* Scan highlight for buttons and cells */
.scan-highlight {
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: 2px;
    box-shadow: 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent), inset 0 0 10px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 20%, transparent) !important;
    animation: scanPulse 0.8s ease-in-out infinite alternate;
}

@keyframes scanPulse {
    0% {
        outline-color: var(--scan-highlight-color, #ffd700);
        box-shadow: 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent), inset 0 0 10px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 20%, transparent);
    }
    100% {
        outline-color: var(--scan-highlight-color, #ffd700);
        box-shadow: 0 0 30px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 80%, transparent), inset 0 0 15px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 30%, transparent);
    }
}

/* Row highlight for grid scanning */
.row-highlight {
    background: color-mix(in srgb, var(--scan-highlight-color, #ffd700) 35%, transparent) !important;
    box-shadow: inset 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 50%, transparent) !important;
    outline: 3px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: -3px;
}

/* Row highlight on player-hit cell - preserve red X */
.grid-cell.player-hit.row-highlight {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 4L20 20M20 4L4 20' stroke='%23f25042' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 12% 12%,
        color-mix(in srgb, var(--scan-highlight-color, #ffd700) 35%, transparent) !important;
    background-size: clamp(12px, 50%, 24px) clamp(12px, 50%, 24px), 100% 100% !important;
    outline: 3px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: -3px;
}

/* Placement preview highlight */
.placement-preview {
    background: rgba(78, 150, 243, 0.4) !important;
    box-shadow: inset 0 0 0 3px #4b95f3, 0 0 15px rgba(78, 150, 243, 0.5) !important;
}

/* Menu button scan highlight */
.menu-buttons .scan-highlight,
.action-btn.scan-highlight,
.start-game-btn.scan-highlight {
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: 3px;
    box-shadow: 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent) !important;
    transform: scale(1.05);
}

/* Modal button scan highlight */
.modal-btn.scan-highlight {
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: 3px;
    transform: scale(1.08);
    box-shadow: 0 0 25px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 70%, transparent) !important;
}

/* Grid cell scan highlight override to ensure visibility */
.grid-cell.scan-highlight {
    background: color-mix(in srgb, var(--scan-highlight-color, #ffd700) 35%, transparent) !important;
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: -2px;
    z-index: 10;
}

/* Scan highlight on player-hit cell - preserve red X */
.grid-cell.player-hit.scan-highlight {
    background: 
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M4 4L20 20M20 4L4 20' stroke='%23f25042' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat 12% 12%,
        color-mix(in srgb, var(--scan-highlight-color, #ffd700) 35%, transparent) !important;
    background-size: clamp(12px, 50%, 24px) clamp(12px, 50%, 24px), 100% 100% !important;
}

/* Ship cells scan highlight (for selecting ships) - uses highlight style */
.grid-cell.occupied.scan-highlight {
    box-shadow: inset 0 0 0 4px var(--scan-highlight-color, #ffd700), 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 70%, transparent) !important;
}

/* Game Over Modal OK Button */
.game-over-modal .menu-button {
    margin-top: clamp(15px, 2vh, 25px);
    width: auto;
    min-width: 150px;
}

.game-over-modal .menu-button.scan-highlight {
    outline: 4px solid var(--scan-highlight-color, #ffd700) !important;
    outline-offset: 3px;
    transform: scale(1.05);
    box-shadow: 0 0 20px color-mix(in srgb, var(--scan-highlight-color, #ffd700) 60%, transparent) !important;
}

/* =========================================
   HIGHLIGHT STYLES (Dynamic via JS)
   ========================================= */

/* CSS Variables for dynamic highlighting */
:root {
    --scan-highlight-color: #ffd700;
}

/* Glow Style (default) */
body.highlight-glow .scan-highlight {
    outline: 4px solid var(--scan-highlight-color) !important;
    outline-offset: 3px;
    box-shadow: 0 0 25px var(--scan-highlight-color) !important;
}

body.highlight-glow .row-highlight {
    background: color-mix(in srgb, var(--scan-highlight-color) 35%, transparent) !important;
    box-shadow: inset 0 0 20px var(--scan-highlight-color) !important;
    outline: 3px solid var(--scan-highlight-color) !important;
    outline-offset: -3px;
}

/* Outline Style */
body.highlight-outline .scan-highlight {
    outline: 5px solid var(--scan-highlight-color) !important;
    outline-offset: 2px;
    box-shadow: none !important;
}

body.highlight-outline .row-highlight {
    outline: 4px solid var(--scan-highlight-color) !important;
    outline-offset: -4px;
    background: color-mix(in srgb, var(--scan-highlight-color) 20%, transparent) !important;
    box-shadow: none !important;
}

/* Solid Style */
body.highlight-solid .scan-highlight {
    background: var(--scan-highlight-color) !important;
    color: #000 !important;
    outline: none !important;
    box-shadow: none !important;
}

body.highlight-solid .row-highlight {
    background: color-mix(in srgb, var(--scan-highlight-color) 50%, transparent) !important;
    outline: none !important;
    box-shadow: none !important;
}

/* Pause Button (fixed in corner during gameplay) */
.pause-button {
    position: fixed;
    top: 15px;
    left: 15px;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    z-index: 1000;
    user-select: none;
    border: 2px solid rgba(255,255,255,0.5);
    backdrop-filter: blur(4px);
    transition: all 0.2s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.pause-button:hover {
    background: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

/* Pause Modal */
.pause-modal {
    text-align: center;
}

.pause-modal h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: #78c6ff;
    margin-bottom: clamp(15px, 2vh, 25px);
}

.pause-buttons {
    display: flex;
    flex-direction: column;
    gap: clamp(10px, 1.5vh, 15px);
    align-items: center;
}

.pause-buttons .menu-button {
    min-width: 200px;
}

.pause-settings-grid {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 1vh, 12px);
}

.pause-settings-grid .setting-btn {
    min-width: 220px;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
}

.pause-settings-grid .back-btn {
    margin-top: clamp(10px, 1.5vh, 15px);
}

/* =========================================
   PHASE SCREENS (Attack & Defense)
   ========================================= */
.phase-screen {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: phaseSlideIn 0.4s ease-out;
}

@keyframes phaseSlideIn {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.phase-header {
    padding: clamp(4px, 0.8vh, 8px) clamp(10px, 2vw, 20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(4px, 0.5vh, 6px);
    background: rgba(0, 0, 0, 0.3);
}

.phase-indicator {
    display: flex;
    align-items: center;
    gap: clamp(6px, 1vw, 10px);
    padding: clamp(4px, 0.8vh, 8px) clamp(12px, 2.5vw, 25px);
    border-radius: 50px;
    font-size: clamp(0.9rem, 2vw, 1.2rem);
    font-weight: 700;
    animation: phasePulse 2s ease-in-out infinite;
}

.phase-indicator.attack-phase {
    background: linear-gradient(135deg, rgba(46, 204, 64, 0.3) 0%, rgba(46, 204, 64, 0.1) 100%);
    border: 2px solid rgba(46, 204, 64, 0.6);
    color: #2ecc40;
}

.phase-indicator.defense-phase {
    background: linear-gradient(135deg, rgba(242, 80, 66, 0.3) 0%, rgba(242, 80, 66, 0.1) 100%);
    border: 2px solid rgba(242, 80, 66, 0.6);
    color: #f25042;
}

@keyframes phasePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.phase-icon {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
}

.phase-text {
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: clamp(0.8rem, 1.8vw, 1rem);
}

/* Ship Status Bar */
.ship-status-bar {
    display: flex;
    justify-content: center;
    gap: clamp(4px, 1vw, 10px);
    flex-wrap: wrap;
    padding: clamp(2px, 0.5vh, 5px);
}

.ship-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: clamp(3px, 0.5vh, 5px) clamp(5px, 1vw, 8px);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.ship-icon.sunk {
    background: rgba(242, 80, 66, 0.2);
    border-color: rgba(242, 80, 66, 0.5);
    text-decoration: line-through;
    opacity: 0.6;
}

.ship-icon-emoji {
    font-size: clamp(0.9rem, 2vw, 1.2rem);
}

.ship-icon-name {
    font-size: clamp(0.5rem, 1vw, 0.65rem);
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Phase Content */
.phase-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(10px, 2vh, 20px);
    min-height: 0;
}

.phase-grid-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* =========================================
   COVER EYES SCREEN (2-Player Mode)
   ========================================= */
.cover-screen {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at center, #1a1a2e 0%, #0a0a15 100%);
    animation: coverFadeIn 0.5s ease-out;
}

@keyframes coverFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.cover-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: clamp(20px, 4vh, 40px);
    max-width: 90%;
}

.cover-icon {
    font-size: clamp(4rem, 15vw, 8rem);
    margin-bottom: clamp(15px, 3vh, 30px);
    animation: coverBounce 1s ease-in-out infinite;
}

@keyframes coverBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.cover-title {
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 900;
    color: #ff6b6b;
    text-shadow: 0 0 30px rgba(255, 107, 107, 0.5);
    margin: 0 0 clamp(10px, 2vh, 20px) 0;
    letter-spacing: 3px;
}

.cover-subtitle {
    font-size: clamp(1.2rem, 4vw, 2rem);
    font-weight: 700;
    color: #ffd700;
    margin: 0 0 clamp(15px, 3vh, 30px) 0;
}

.cover-instruction {
    font-size: clamp(0.9rem, 2.5vw, 1.3rem);
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 clamp(20px, 4vh, 40px) 0;
    max-width: 500px;
}

.cover-ready-btn {
    padding: clamp(18px, 3vh, 30px) clamp(50px, 10vw, 100px) !important;
    font-size: clamp(1.3rem, 4vw, 2rem) !important;
    background: linear-gradient(135deg, #2ecc40 0%, #27ae38 100%) !important;
    animation: readyPulse 1.5s ease-in-out infinite;
}

@keyframes readyPulse {
    0%, 100% { 
        box-shadow: 0 0 20px rgba(46, 204, 64, 0.4);
        transform: scale(1);
    }
    50% { 
        box-shadow: 0 0 40px rgba(46, 204, 64, 0.8);
        transform: scale(1.05);
    }
}

/* =========================================
   PLACEMENT SCREEN SPECIFIC
   ========================================= */
.placement-indicator {
    padding: clamp(8px, 1.5vh, 12px) clamp(15px, 3vw, 25px);
    background: linear-gradient(135deg, rgba(120, 198, 255, 0.2) 0%, rgba(120, 198, 255, 0.1) 100%);
    border: 2px solid rgba(120, 198, 255, 0.4);
    border-radius: 25px;
    color: #78c6ff;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    font-weight: 600;
}

/* =========================================
   ATTACK GRID CELL STATES
   ========================================= */
.grid-cell.attack-hit {
    background: rgba(46, 204, 64, 0.2);
    border-color: rgba(46, 204, 64, 0.8);
    box-shadow: inset 0 0 0 3px #1a8c2a;
}

.grid-cell.attack-hit::after {
    content: '✕';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(1.2rem, 3.5vw, 2rem);
    color: #2ecc40;
}

.grid-cell.attack-miss {
    background: rgba(150, 150, 150, 0.15);
    border-color: rgba(150, 150, 150, 0.4);
}

.grid-cell.attack-miss::after {
    content: '•';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: rgba(150, 150, 150, 0.7);
}

.attack-grid .grid-cell.enemy-sunk {
    background: rgba(46, 204, 64, 0.5) !important;
    border-color: #2ecc40;
}

/* =========================================
   DEFENSE GRID CELL STATES  
   ========================================= */
.grid-cell.defense-hit {
    background: rgba(242, 80, 66, 0.5);
    border-color: rgba(242, 80, 66, 0.8);
}

.grid-cell.defense-hit::after {
    content: '✕';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(1.2rem, 3.5vw, 2rem);
    color: #f25042;
}

.grid-cell.defense-miss::after {
    content: '•';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: rgba(150, 150, 150, 0.7);
}

.grid-cell.player-sunk {
    background: rgba(100, 100, 100, 0.5);
    border-color: rgba(100, 100, 100, 0.8);
}

.grid-cell.player-sunk::after {
    content: '✕';
    font-size: clamp(1.2rem, 3.5vw, 2rem);
    color: #999;
}

/* Attack phase grid - cells without fire history */
#attackGrid .grid-cell:not(.attack-hit):not(.attack-miss) {
    cursor: pointer;
}

#attackGrid .grid-cell:not(.attack-hit):not(.attack-miss):hover {
    background: rgba(255, 255, 255, 0.2);
}