/* ==========================================================================
   Sea Battle — GitHub Dark Graphite Minimalist Stylesheet
   Synchronized with Json-Formatter, Time-Calculator & Randomizer
   ========================================================================== */

:root {
    /* GitHub Primer Dark Palette */
    --color-canvas-default: #0d1117;
    --color-canvas-subtle: #161b22;
    --color-canvas-inset: #090d13;
    --color-border-default: #30363d;
    --color-border-muted: #21262d;
    --color-border-subtle: rgba(240, 246, 252, 0.1);

    /* Text */
    --color-fg-default: #f0f6fc;
    --color-fg-muted: #8b949e;
    --color-fg-subtle: #6e7681;

    /* Accents */
    --color-accent-fg: #58a6ff;
    --color-accent-emphasis: #1f6feb;
    --color-accent-muted: rgba(56, 139, 253, 0.15);

    /* Success (GitHub Green) */
    --color-success-fg: #3fb950;
    --color-success-emphasis: #238636;
    --color-success-hover: #2ea043;
    --color-success-muted: rgba(46, 160, 67, 0.15);

    /* Danger */
    --color-danger-fg: #f85149;
    --color-danger-emphasis: #da3633;
    --color-danger-muted: rgba(248, 81, 73, 0.15);

    /* Buttons */
    --color-btn-bg: #21262d;
    --color-btn-border: #30363d;
    --color-btn-hover-bg: #30363d;
    --color-btn-hover-border: #8b949e;

    /* Grid & Ships */
    --cell-bg: #0e131b;
    --cell-border: #1f2631;
    --cell-hover: #1c232f;
    --ship-bg: #1f6feb;
    --ship-border: #58a6ff;
    --hit-bg: rgba(248, 81, 73, 0.25);
    --hit-border: #f85149;
    --sunk-bg: rgba(218, 54, 51, 0.5);
    --sunk-border: #f85149;

    /* Typography & Radii */
    --font-head: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "JetBrains Mono", monospace;
    --radius-md: 6px;
    --radius-sm: 4px;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(1, 4, 9, 0.4);
    --shadow-modal: 0 16px 36px rgba(1, 4, 9, 0.8);
    --transition: all 0.14s ease-in-out;

    /* Grid & Coordinates Alignment */
    --grid-cell-size: 32px;
    --coord-size: 22px;
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--color-canvas-default);
    color: var(--color-fg-default);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    user-select: none;
    -webkit-user-select: none;
}

/* App Shell Layout */
.app-layout {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    width: 100%;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    top: auto;
    left: auto;
    transform: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1000;
    pointer-events: none;
    max-width: 340px;
    align-items: flex-end;
}

.toast {
    background: rgba(18, 24, 38, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    color: #ffffff;
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.82rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: toastPop 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

.toast.toast-danger {
    border-color: rgba(244, 63, 94, 0.35);
    color: #f43f5e;
    background: rgba(244, 63, 94, 0.14);
}

.toast.toast-success {
    border-color: rgba(16, 185, 129, 0.35);
    color: #10b981;
    background: rgba(16, 185, 129, 0.14);
}

@keyframes toastPop {
    from { opacity: 0; transform: translateY(8px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Floating Reactions */
.reaction-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
}

.floating-reaction {
    position: absolute;
    font-size: 2rem;
    animation: floatUp 1.8s ease-out forwards;
}

@keyframes floatUp {
    0% { opacity: 1; transform: translateY(0) scale(0.7); }
    20% { transform: translateY(-25px) scale(1.1); }
    100% { opacity: 0; transform: translateY(-130px) scale(0.9); }
}

/* ==========================================================================
   Floating Top Navigation Actions (Sound & Rules)
   ========================================================================== */
.top-nav-actions {
    position: fixed;
    top: 16px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 100;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-fg-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn-icon:hover {
    color: var(--color-fg-default);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Stage & Cards
   ========================================================================== */
.main-stage {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
}

.card {
    background: var(--color-canvas-subtle);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-card);
    display: none;
    flex-direction: column;
    gap: 16px;
    width: 100%;
}

.screen.active {
    display: flex;
    animation: fadeIn 0.14s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(3px); }
    to { opacity: 1; transform: translateY(0); }
}

.card-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==========================================================================
   Buttons (GitHub Primer Style)
   ========================================================================== */
.btn {
    font-family: var(--font-ui);
    font-size: 0.84rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-btn-border);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    outline: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--color-success-emphasis);
    border-color: rgba(240, 246, 252, 0.1);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-success-hover);
}

.btn-secondary {
    background: var(--color-btn-bg);
    border-color: var(--color-btn-border);
    color: var(--color-fg-default);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-btn-hover-bg);
    border-color: var(--color-btn-hover-border);
}

.btn-danger {
    background: var(--color-btn-bg);
    border-color: var(--color-border-default);
    color: var(--color-danger-fg);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-emphasis);
    border-color: var(--color-danger-emphasis);
    color: #ffffff;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.78rem;
    gap: 5px;
}

.btn-full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-back {
    background: transparent;
    border: 1px solid var(--color-btn-border);
    border-radius: var(--radius-sm);
    color: var(--color-fg-muted);
    padding: 4px 10px;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.btn-back:hover {
    color: var(--color-fg-default);
    background: var(--color-btn-hover-bg);
    border-color: var(--color-btn-hover-border);
}

/* ==========================================================================
   SCREEN 1: MENU (Modeled after Tic-Tac-Toe)
   ========================================================================== */
.screen-menu-wrapper {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    width: 100%;
    max-width: 400px;
    margin: auto;
}

.screen-menu-wrapper.active {
    display: flex;
    animation: fadeUp 0.22s ease-out;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.menu-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2px;
}

.game-title {
    font-family: var(--font-head);
    font-size: 1.9rem;
    font-weight: 900;
    letter-spacing: 3.5px;
    color: #ffffff;
    text-align: center;
    line-height: 1;
    margin: 0;
}

.menu-card {
    background: rgba(18, 24, 38, 0.72);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 18px;
    padding: 24px 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
}

.card-subtitle {
    font-family: var(--font-head);
    font-size: 0.82rem;
    font-weight: 700;
    color: #475569;
    letter-spacing: 2px;
    text-align: center;
    text-transform: uppercase;
    margin-bottom: 2px;
}

.menu-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
}

.menu-btn {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 1px;
    padding: 16px 20px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #f8fafc;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.11);
    border-color: rgba(255, 255, 255, 0.22);
    transform: translateY(-2px);
    color: #ffffff;
}

.menu-btn:active {
    transform: translateY(0);
}

/* ==========================================================================
   SCREEN 2 & 3: ONLINE LOBBY & WAITING
   ========================================================================== */
.screen-small {
    max-width: 360px;
    width: 100%;
    margin: auto;
}

.lobby-box {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: 100%;
}

.divider {
    display: flex;
    align-items: center;
    color: var(--color-fg-subtle);
    font-size: 0.72rem;
    font-weight: 500;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border-default);
}

.divider span {
    padding: 0 10px;
}

.join-row {
    display: flex;
    gap: 8px;
}

.join-row input {
    flex: 1;
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-sm);
    padding: 7px 12px;
    color: var(--color-fg-default);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-align: center;
    outline: none;
    transition: var(--transition);
}

.join-row input:focus {
    border-color: var(--color-accent-fg);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

.network-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.74rem;
    color: var(--color-fg-subtle);
    margin: 0 auto;
}

.network-status .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-success-fg);
}

.waiting-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding: 8px 0;
    width: 100%;
}

.waiting-spinner {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--color-border-default);
    border-top-color: var(--color-accent-fg);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.waiting-text {
    font-size: 0.84rem;
    color: var(--color-fg-muted);
}

.code-pill {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-sm);
    padding: 6px 14px;
    width: 100%;
}

.code-text {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-accent-fg);
}

/* ==========================================================================
   SCREEN 4: FLEET PLACEMENT
   ========================================================================== */
#screen-placement {
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
    border-radius: var(--radius-lg, 20px);
    background: rgba(18, 24, 38, 0.72);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.placement-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: #ffffff;
    margin: 0;
    text-align: center;
}

.placement-count-badge {
    display: flex;
    align-items: center;
    gap: 6px;
}

.count-pill {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: #38bdf8;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.25);
    padding: 4px 10px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.count-pill.ready {
    color: #10b981;
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.2);
}

.placement-layout {
    display: flex;
    gap: 24px;
    justify-content: center;
    align-items: stretch;
    flex-wrap: wrap;
    margin-top: 4px;
}

.board-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.board-meta {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 4px;
    margin-bottom: 6px;
}

.board-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-fg-muted);
}

.grid-outer {
    background: rgba(11, 15, 25, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 12px;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.4);
    transition: var(--transition);
}

.grid-outer.enemy-grid {
    border-color: rgba(255, 255, 255, 0.08);
}

.grid-header-row {
    display: grid;
    grid-template-columns: calc(var(--coord-size) + 3px) repeat(10, var(--grid-cell-size));
    column-gap: 1px;
    margin-bottom: 3px;
}

.coord-corner {
    width: calc(var(--coord-size) + 3px);
    height: var(--coord-size);
}

.coord-col {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    height: var(--coord-size);
    user-select: none;
}

.grid-body-row {
    display: flex;
}

.grid-num-col {
    display: grid;
    grid-template-rows: repeat(10, var(--grid-cell-size));
    row-gap: 1px;
    padding-top: 1px;
    width: var(--coord-size);
    margin-right: 3px;
}

.coord-row {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    height: var(--grid-cell-size);
    user-select: none;
}

/* 10x10 Grid Cells */
.battle-grid {
    display: grid;
    grid-template-columns: repeat(10, var(--grid-cell-size));
    grid-template-rows: repeat(10, var(--grid-cell-size));
    gap: 1px;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

.cell {
    background: rgba(18, 24, 38, 0.85);
    position: relative;
    cursor: pointer;
    transition: background 0.12s ease, box-shadow 0.12s ease, transform 0.1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    padding: 0;
    outline: none;
    border-radius: 4px;
}

#placement-grid,
#placement-grid .cell {
    cursor: pointer;
}

#placement-grid .cell:hover:not(.has-ship),
.enemy-grid .battle-grid.active-turn .cell:hover:not(.state-miss):not(.state-hit):not(.state-sunk) {
    background: rgba(56, 189, 248, 0.14);
}

/* Ship Cells on Grid (Identical to dock ship selector deck chips) */
.cell.has-ship {
    background: #38bdf8 !important;
    border-radius: 4px;
    box-shadow: 0 0 6px rgba(56, 189, 248, 0.4);
    position: relative;
    z-index: 1;
}

/* Hover over ship on placement screen to remove */
#screen-placement .cell.has-ship:hover {
    background: #f43f5e !important;
    box-shadow: 0 0 8px rgba(244, 63, 94, 0.5) !important;
}

/* Placement Preview */
.cell.preview-valid {
    background: rgba(56, 189, 248, 0.4) !important;
    border-radius: 4px;
    box-shadow: 0 0 6px rgba(56, 189, 248, 0.25);
}

.cell.preview-invalid {
    background: rgba(244, 63, 94, 0.4) !important;
    border-radius: 4px;
    box-shadow: 0 0 6px rgba(244, 63, 94, 0.25);
}

/* Hit & Miss */
.cell.state-miss::after {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.45);
    box-shadow: 0 0 6px rgba(255, 255, 255, 0.3);
}

.cell.state-hit {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.85) 0%, rgba(185, 28, 28, 0.95) 100%) !important;
}

.cell.state-hit::before, .cell.state-hit::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 2.5px;
    background: #ffffff;
    border-radius: 1px;
}

.cell.state-hit::before { transform: rotate(45deg); }
.cell.state-hit::after { transform: rotate(-45deg); }

.cell.state-sunk {
    background: linear-gradient(135deg, #7f1d1d 0%, #450a0a 100%) !important;
}

.cell.state-sunk::before, .cell.state-sunk::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 2.5px;
    background: #fca5a5;
    border-radius: 1px;
}

.cell.state-sunk::before { transform: rotate(45deg); }
.cell.state-sunk::after { transform: rotate(-45deg); }

/* Last Shot Highlight Indicator */
.cell.last-shot-highlight {
    outline: 2px solid var(--color-accent-fg) !important;
    outline-offset: -2px;
    box-shadow: 0 0 10px rgba(88, 166, 255, 0.7) !important;
    z-index: 2;
}

/* Ship Dock (Placement Side Wing) */
.ship-dock {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
    flex: 1;
    min-width: 250px;
    padding: 0;
}

.dock-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-rotate-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 9px 12px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-rotate-toggle:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.rotate-btn-content {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.84rem;
}

.rotate-icon {
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-rotate-toggle.is-vertical .rotate-icon {
    transform: rotate(90deg);
}

.kbd-shortcut {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.45);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 1px 5px;
    border-radius: 4px;
}

.orientation-badge {
    font-family: var(--font-ui);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: #38bdf8;
    background: rgba(56, 189, 248, 0.12);
    border: 1px solid rgba(56, 189, 248, 0.25);
    padding: 3px 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.btn-rotate-toggle.is-vertical .orientation-badge {
    color: #a78bfa;
    background: rgba(167, 139, 250, 0.12);
    border-color: rgba(167, 139, 250, 0.25);
}

.dock-actions-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.btn-dock-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 10px;
    border-radius: 10px;
    font-size: 0.82rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-dock-action:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    transform: translateY(-1px);
}

/* Ships Inventory List */
.ships-list {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.ship-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    padding: 7px 12px;
    cursor: pointer;
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
    user-select: none;
}

.ship-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
}

.ship-item.selected {
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.45);
    box-shadow: 0 0 14px rgba(56, 189, 248, 0.15);
}

.ship-item.completed {
    opacity: 0.38;
    cursor: default;
    border-color: rgba(255, 255, 255, 0.04);
    background: rgba(255, 255, 255, 0.015);
    pointer-events: none;
    transform: none;
}

.ship-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.ship-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.3px;
}

.ship-item.selected .ship-name {
    color: #38bdf8;
}

.ship-visual {
    display: flex;
    gap: 3px;
    align-items: center;
}

.ship-deck {
    width: 13px;
    height: 10px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    transition: all 0.15s ease;
}

.ship-item.selected .ship-deck {
    background: #38bdf8;
    box-shadow: 0 0 4px rgba(56, 189, 248, 0.4);
}

.ship-count {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 3px 8px;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.ship-item.selected .ship-count {
    color: #38bdf8;
    border-color: rgba(56, 189, 248, 0.3);
    background: rgba(56, 189, 248, 0.1);
}

.ship-count.done {
    color: #10b981;
    background: rgba(16, 185, 129, 0.12);
    border-color: rgba(16, 185, 129, 0.3);
}

/* Start Game Button */
#btn-ready-battle {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    font-family: 'Outfit', var(--font-ui);
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
}

#btn-ready-battle:disabled {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.3);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

#btn-ready-battle:not(:disabled) {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    border-color: rgba(16, 185, 129, 0.4);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

#btn-ready-battle:not(:disabled):hover {
    filter: brightness(1.1);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(16, 185, 129, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

#btn-ready-battle:not(:disabled):active {
    transform: translateY(0);
}

/* ==========================================================================
   SCREEN 5: BATTLE ARENA
   ========================================================================== */
.battle-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 2px;
}

.turn-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    padding: 5px 12px;
    border-radius: 20px;
}

.turn-pulse-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--color-success-fg);
    box-shadow: 0 0 6px var(--color-success-fg);
}

.turn-pulse-dot.enemy-turn {
    background: var(--color-danger-fg);
    box-shadow: 0 0 6px var(--color-danger-fg);
}

.turn-title {
    font-size: 0.82rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-fg-default);
}

.boards-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Battle board cursor management */
#my-battle-grid,
#my-battle-grid .cell {
    cursor: default;
}

.enemy-grid .battle-grid:not(.active-turn),
.enemy-grid .battle-grid:not(.active-turn) .cell {
    cursor: not-allowed;
}

/* Active turn board state: unified crosshair reticle across grid and cells */
.enemy-grid .battle-grid.active-turn,
.enemy-grid .battle-grid.active-turn .cell {
    cursor: crosshair;
}

.enemy-grid .battle-grid .cell.state-miss,
.enemy-grid .battle-grid .cell.state-hit,
.enemy-grid .battle-grid .cell.state-sunk {
    cursor: not-allowed;
}

.enemy-grid:has(.active-turn) {
    border-color: var(--color-accent-fg);
    box-shadow: 0 0 0 1px var(--color-accent-fg);
}

.fleet-tracker {
    display: flex;
    gap: 3px;
}

.mini-ship {
    display: flex;
    gap: 1.5px;
    padding: 1px 2px;
    background: var(--color-canvas-inset);
    border-radius: 2px;
    border: 1px solid var(--color-border-default);
}

.mini-ship.sunk {
    opacity: 0.25;
    border-color: var(--color-danger-fg);
}

.mini-deck {
    width: 4px;
    height: 4px;
    border-radius: 1px;
    background: var(--color-accent-fg);
}

.mini-ship.sunk .mini-deck {
    background: var(--color-danger-fg);
}

.reactions-bar {
    display: flex;
    justify-content: center;
    gap: 6px;
}

.emoji-btn {
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.emoji-btn:hover {
    background: var(--color-btn-hover-bg);
    border-color: var(--color-btn-hover-border);
}

/* Host In-Game Room Invite Bar */
.host-invite-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    padding: 8px 14px;
    background: var(--color-canvas-subtle);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    margin: 12px auto 0;
    max-width: 500px;
    box-shadow: var(--shadow-card);
}

.host-code-box {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-muted);
    border-radius: var(--radius-sm);
    padding: 3px 8px;
}

.host-code-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

#game-room-code-input {
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-accent-fg);
    width: 68px;
    text-align: center;
    letter-spacing: 0.12em;
}

.btn-icon-sm {
    width: 26px;
    height: 26px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-fg-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.btn-icon-sm:hover {
    color: var(--color-fg-default);
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.host-invite-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Mobile Tabs */
.mobile-board-tabs {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    background: var(--color-canvas-inset);
    padding: 2px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-default);
}

.mobile-tab-btn {
    background: transparent;
    border: none;
    color: var(--color-fg-muted);
    padding: 6px;
    border-radius: 3px;
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.mobile-tab-btn.active {
    background: var(--color-btn-bg);
    color: var(--color-fg-default);
}

.tab-badge {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    margin-left: 2px;
}

#enemy-tab-badge {
    background: var(--color-accent-fg);
    box-shadow: 0 0 6px var(--color-accent-fg);
}

#my-fleet-tab-badge {
    background: var(--color-danger-fg);
    box-shadow: 0 0 6px var(--color-danger-fg);
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(1, 4, 9, 0.75);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1100;
    padding: 16px;
    animation: fadeIn 0.12s ease-out;
}

.modal-overlay.active {
    display: flex;
}

.modal-card {
    background: var(--color-canvas-subtle);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    padding: 20px;
    max-width: 380px;
    width: 100%;
    box-shadow: var(--shadow-modal);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-fg-default);
}

.modal-title.victory {
    color: var(--color-success-fg);
}

.modal-title.defeat {
    color: var(--color-danger-fg);
}

.modal-desc {
    font-size: 0.82rem;
    color: var(--color-fg-muted);
    margin-top: -6px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-sm);
    padding: 10px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 1px;
    text-align: center;
}

.stat-label {
    font-size: 0.68rem;
    color: var(--color-fg-subtle);
    font-weight: 500;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-fg-default);
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.rules-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.84rem;
    color: var(--color-fg-muted);
}

.rule-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.rule-num {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--color-accent-fg);
    background: var(--color-canvas-inset);
    border: 1px solid var(--color-border-default);
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 780px) {
    :root {
        --grid-cell-size: 27px;
        --coord-size: 22px;
    }

    .boards-container {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .mobile-board-tabs {
        display: grid;
    }

    .board-wrapper.mobile-hidden {
        display: none !important;
    }

    .placement-layout {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .ship-dock {
        width: 100%;
        max-width: 320px;
    }
}

@media (max-width: 380px) {
    :root {
        --grid-cell-size: 24px;
        --coord-size: 18px;
    }

    .coord-col, .coord-row {
        font-size: 0.65rem;
    }
}