/**


 * Calm Merge - Relaxing Merge Puzzle Styles


 *


 * @file        styles.css


 * @author      Mike Fairbrother <mike@fairbrother.me>


 * @copyright   2024-2026 Mike Fairbrother. All rights reserved.


 * @license     PROPRIETARY - No rights to copy, modify, distribute, or reuse


 *              any part of this code without explicit written permission from the author.


 */





/* ---- Design Tokens ---- */


:root {


    --bg-dark: #0f0c29;


    --bg-mid: #1a1640;


    --text-primary: #fff;


    --text-secondary: rgba(255, 255, 255, 0.6);


    --accent: #ffd93d;


    --accent-glow: rgba(255, 217, 61, 0.4);


    --danger: #ff4757;


    --success: #2ed573;


    --transition-fast: 150ms;


    --transition-normal: 300ms;





    /* Calm palette */


    --calm-green: #7ec8a0;


    --calm-blue: #7ba7c9;


    --calm-purple: #b49fcc;


    --calm-rose: #d4a0a0;


    --calm-gold: #d4c07a;


    --calm-surface: rgba(255, 255, 255, 0.05);


    --calm-cell: rgba(255, 255, 255, 0.04);


    --calm-cell-hover: rgba(255, 255, 255, 0.08);


    --calm-selected: rgba(126, 200, 160, 0.25);


    --calm-selected-border: rgba(126, 200, 160, 0.6);


    --calm-match-glow: rgba(126, 200, 160, 0.4);





    --grid-size: 5;


    --cell-gap: 6px;


}





/* ---- Reset ---- */


*, *::before, *::after {


    margin: 0;


    padding: 0;


    box-sizing: border-box;


    -webkit-tap-highlight-color: transparent;


}





html, body {


    width: 100%;


    height: 100%;


    overflow: hidden;


    background: var(--bg-dark);


    color: var(--text-primary);


    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;


    touch-action: manipulation;


    user-select: none;


    -webkit-user-select: none;


}





/* ---- App Container ---- */


#app {


    position: relative;


    width: 100%;


    max-width: 420px;


    height: 100vh;


    height: 100dvh;


    margin: 0 auto;


    overflow: hidden;


    background: linear-gradient(170deg, #1a2a1a 0%, #0f0c29 35%, #1a1640 70%, #0f1a2a 100%);


}





/* ---- Screen System ---- */


.screen {


    position: absolute;


    inset: 0;


    display: flex;


    flex-direction: column;


    opacity: 0;


    pointer-events: none;


    transition: opacity 0.5s ease;


    z-index: 1;


}


.screen.active {


    opacity: 1;


    pointer-events: auto;


    z-index: 10;


}


.screen-content {


    flex: 1;


    display: flex;


    flex-direction: column;


    align-items: center;


    justify-content: safe center;


    padding: 40px 24px;


    text-align: center;


    overflow-y: auto;


}





/* ---- Back Link ---- */


.back-to-games-inline {


    display: inline-flex;


    align-items: center;


    gap: 6px;


    color: var(--text-secondary);


    text-decoration: none;


    font-size: 13px;


    font-weight: 600;


    padding: 8px 14px;


    border-radius: 10px;


    transition: color var(--transition-fast), background var(--transition-fast);


    margin-bottom: 12px;


}


.back-to-games-inline:active {


    background: rgba(255, 255, 255, 0.08);


    color: var(--text-primary);


}


.gameover-back {


    margin-top: 12px;


}





/* ---- Menu Screen ---- */


.game-logo {


    display: flex;


    gap: 8px;


    margin-bottom: 16px;


}


.logo-emoji {


    font-size: 48px;


    animation: calm-float 4s ease-in-out infinite;


    filter: drop-shadow(0 4px 12px rgba(126, 200, 160, 0.3));


}


.logo-emoji-1 { animation-delay: 0s; }


.logo-emoji-2 { animation-delay: 1.3s; }


.logo-emoji-3 { animation-delay: 2.6s; }





@keyframes calm-float {


    0%, 100% { transform: translateY(0); }


    50% { transform: translateY(-8px); }


}





.game-title {


    font-size: 52px;


    font-weight: 800;


    line-height: 1;


    letter-spacing: -1px;


    background: linear-gradient(135deg, var(--calm-green), var(--calm-blue), var(--calm-purple));


    -webkit-background-clip: text;


    -webkit-text-fill-color: transparent;


    background-clip: text;


    margin-bottom: 8px;


}





.game-subtitle {


    font-size: 16px;


    color: var(--text-secondary);


    margin-bottom: 20px;


    font-weight: 500;


    letter-spacing: 1px;


}





.menu-best {


    font-size: 16px;


    color: var(--calm-gold);


    font-weight: 700;


    margin-bottom: 24px;


    font-variant-numeric: tabular-nums;


}





/* ---- Buttons ---- */


.btn {


    display: block;


    width: 220px;


    padding: 16px 32px;


    border: none;


    border-radius: 16px;


    font-size: 20px;


    font-weight: 700;


    cursor: pointer;


    transition: transform var(--transition-fast), box-shadow var(--transition-fast);


    letter-spacing: 0.5px;


    font-family: inherit;


    text-decoration: none;


    text-align: center;


}


.btn:active { transform: scale(0.95); }





.btn-primary {


    background: linear-gradient(135deg, var(--calm-green), #5baf82);


    color: #0f1a12;


    box-shadow: 0 4px 24px rgba(126, 200, 160, 0.3);


}


.btn-primary:active {


    box-shadow: 0 2px 12px rgba(126, 200, 160, 0.2);


}





.btn-secondary {


    background: rgba(255, 255, 255, 0.08);


    color: var(--text-secondary);


    margin-top: 12px;


    font-size: 16px;


    padding: 12px 32px;


}





/* ---- Daily Challenge Button ---- */


.btn-accent {


    background: linear-gradient(135deg, var(--calm-blue), var(--calm-purple));


    color: #fff;


    box-shadow: 0 4px 24px rgba(123, 167, 201, 0.3);


    margin-top: 12px;


    font-size: 17px;


    padding: 14px 32px;


}


.btn-accent:active {


    box-shadow: 0 2px 12px rgba(123, 167, 201, 0.2);


}


.btn-accent.daily-done {


    background: rgba(255, 255, 255, 0.08);


    color: var(--text-secondary);


    box-shadow: none;


}





.daily-streak-label {


    font-size: 13px;


    color: var(--calm-gold);


    font-weight: 600;


    margin-top: 6px;


}





/* ---- Icon Buttons ---- */


.icon-btn {


    width: 36px;


    height: 36px;


    border: none;


    border-radius: 10px;


    background: rgba(255, 255, 255, 0.08);


    color: var(--text-secondary);


    font-size: 16px;


    cursor: pointer;


    display: flex;


    align-items: center;


    justify-content: center;


    transition: background var(--transition-fast);


    flex-shrink: 0;


}


.icon-btn:active { background: rgba(255, 255, 255, 0.15); }


.icon-btn-sm { width: 30px; height: 30px; font-size: 14px; }





.settings-row {


    display: flex;


    gap: 12px;


    margin-top: 20px;


}


.pause-settings { margin-top: 16px; }





/* ---- Game Header / HUD ---- */


#game-header {


    display: flex;


    align-items: center;


    padding: 10px 12px 6px;


    gap: 8px;


    min-height: 52px;


}


.stat {


    display: flex;


    flex-direction: column;


    min-width: 0;


}


.stat-right { align-items: flex-end; }


.stat-label {


    font-size: 10px;


    color: var(--text-secondary);


    text-transform: uppercase;


    letter-spacing: 1px;


    font-weight: 600;


}


.stat-value {


    font-size: 22px;


    font-weight: 800;


    font-variant-numeric: tabular-nums;


    line-height: 1.1;


}


.header-center {


    flex: 1;


    display: flex;


    justify-content: center;


    align-items: center;


}





/* ---- Tier Display in HUD ---- */


#tier-display {


    display: flex;


    flex-direction: column;


    align-items: center;


}


.tier-label {


    font-size: 9px;


    color: var(--text-secondary);


    text-transform: uppercase;


    letter-spacing: 1px;


    font-weight: 600;


}


.tier-emoji {


    font-size: 28px;


    filter: drop-shadow(0 2px 6px rgba(126, 200, 160, 0.4));


    transition: transform 0.4s ease;


}


.tier-emoji.pop {


    animation: tier-pop 0.5s ease;


}


@keyframes tier-pop {


    0% { transform: scale(1); }


    40% { transform: scale(1.4); }


    100% { transform: scale(1); }


}





/* ---- Mode Indicator ---- */


.mode-indicator {


    text-align: center;


    font-size: 11px;


    font-weight: 700;


    text-transform: uppercase;


    letter-spacing: 1.5px;


    color: var(--calm-blue);


    padding: 2px 0;


}





/* ---- Merge Chain Display ---- */


#merge-chain {


    padding: 4px 12px;


    overflow: hidden;


    height: 32px;


    display: flex;


    align-items: center;


    justify-content: center;


}


.chain-items {


    display: flex;


    align-items: center;


    gap: 4px;


    font-size: 14px;


    color: var(--text-secondary);


}


.chain-item {


    font-size: 18px;


    transition: transform 0.3s ease, opacity 0.3s ease;


}


.chain-arrow {


    font-size: 11px;


    color: rgba(255, 255, 255, 0.3);


}


.chain-item.current {


    filter: drop-shadow(0 0 6px var(--calm-green));


    transform: scale(1.2);


}





/* ---- Game Board ---- */


#board-wrapper {


    flex: 1;


    display: flex;


    align-items: center;


    justify-content: center;


    padding: 8px 16px;


    position: relative;


}





#board {


    display: grid;


    grid-template-columns: repeat(var(--grid-size), 1fr);


    grid-template-rows: repeat(var(--grid-size), 1fr);


    gap: var(--cell-gap);


    width: 100%;


    max-width: 360px;


    aspect-ratio: 1;


    padding: 10px;


    border-radius: 20px;


    background: rgba(255, 255, 255, 0.025);


    border: 1px solid rgba(255, 255, 255, 0.04);


    position: relative;


}





/* ---- Cells ---- */


.cell {


    position: relative;


    border-radius: 14px;


    background: var(--calm-cell);


    border: 1px solid rgba(255, 255, 255, 0.03);


    display: flex;


    align-items: center;


    justify-content: center;


    font-size: clamp(24px, 7vw, 36px);


    cursor: pointer;


    transition: transform 0.2s ease,


                background 0.3s ease,


                border-color 0.3s ease,


                box-shadow 0.3s ease;


    aspect-ratio: 1;


    overflow: hidden;


}





.cell:active {


    transform: scale(0.92);


}





.cell.empty {


    cursor: default;


}


.cell.empty:active {


    transform: none;


}





/* Selected state */


.cell.selected {


    background: var(--calm-selected);


    border-color: var(--calm-selected-border);


    box-shadow: 0 0 16px var(--calm-match-glow),


                inset 0 0 12px rgba(126, 200, 160, 0.15);


    transform: scale(1.05);


    z-index: 2;


}





/* Matching hint */


.cell.match-hint {


    border-color: rgba(126, 200, 160, 0.35);


    animation: hint-pulse 1.5s ease-in-out infinite;


}





@keyframes hint-pulse {


    0%, 100% { box-shadow: 0 0 0 rgba(126, 200, 160, 0); }


    50% { box-shadow: 0 0 12px rgba(126, 200, 160, 0.2); }


}





/* ---- Cell Item (emoji wrapper) ---- */


.cell-item {


    display: flex;


    align-items: center;


    justify-content: center;


    width: 100%;


    height: 100%;


    transition: transform 0.3s ease, opacity 0.3s ease;


    will-change: transform, opacity;


}





/* ---- Merge Animations ---- */


.cell-item.merge-source {


    animation: merge-shrink 0.35s ease-in forwards;


}





@keyframes merge-shrink {


    0% { transform: scale(1); opacity: 1; }


    100% { transform: scale(0); opacity: 0; }


}





.cell-item.merge-target {


    animation: merge-grow 0.45s ease-out;


}





@keyframes merge-grow {


    0% { transform: scale(0.3); opacity: 0.5; }


    50% { transform: scale(1.3); }


    100% { transform: scale(1); opacity: 1; }


}





/* New item spawn */


.cell-item.spawn {


    animation: item-spawn 0.5s ease-out;


}





@keyframes item-spawn {


    0% { transform: scale(0) rotate(-20deg); opacity: 0; }


    60% { transform: scale(1.1) rotate(5deg); opacity: 1; }


    100% { transform: scale(1) rotate(0); opacity: 1; }


}





/* Shake for no-merge */


.cell.shake {


    animation: cell-shake 0.4s ease;


}





@keyframes cell-shake {


    0%, 100% { transform: translateX(0); }


    20% { transform: translateX(-4px); }


    40% { transform: translateX(4px); }


    60% { transform: translateX(-3px); }


    80% { transform: translateX(2px); }


}





/* Drag styling */


.cell.dragging {


    opacity: 0.5;


    transform: scale(0.9);


    z-index: 5;


}


.cell.drag-over {


    background: var(--calm-selected);


    border-color: var(--calm-selected-border);


    transform: scale(1.08);


}


.cell.drag-over-invalid {


    border-color: rgba(255, 71, 87, 0.4);


}





/* ---- Game Tip ---- */


.game-tip {


    text-align: center;


    font-size: 12px;


    color: var(--text-secondary);


    padding: 8px 16px 12px;


    opacity: 0.7;


    transition: opacity 0.5s ease;


}


.game-tip.hidden {


    opacity: 0;


}





/* ---- Sparkle Particles ---- */


#particles {


    position: fixed;


    inset: 0;


    pointer-events: none;


    z-index: 200;


    overflow: hidden;


}





.sparkle {


    position: absolute;


    width: 6px;


    height: 6px;


    border-radius: 50%;


    pointer-events: none;


    animation: sparkle-drift 0.9s ease-out forwards;


}





@keyframes sparkle-drift {


    0% {


        transform: translate(0, 0) scale(1);


        opacity: 0.9;


    }


    100% {


        transform: translate(var(--dx), var(--dy)) scale(0);


        opacity: 0;


    }


}





/* Score popup */


.score-popup {


    position: absolute;


    font-size: 18px;


    font-weight: 800;


    color: var(--calm-green);


    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);


    pointer-events: none;


    z-index: 20;


    animation: score-float 0.9s ease-out forwards;


    white-space: nowrap;


    transform: translateX(-50%);


}


@keyframes score-float {


    0%   { transform: translateX(-50%) translateY(0) scale(0.5); opacity: 0; }


    20%  { transform: translateX(-50%) translateY(-10px) scale(1.1); opacity: 1; }


    100% { transform: translateX(-50%) translateY(-50px) scale(0.9); opacity: 0; }


}





/* ---- Overlays ---- */


.game-overlay {


    position: absolute;


    inset: 0;


    z-index: 50;


    background: rgba(0, 0, 0, 0.7);


    backdrop-filter: blur(6px);


    -webkit-backdrop-filter: blur(6px);


    display: flex;


    align-items: center;


    justify-content: center;


    opacity: 0;


    pointer-events: none;


    transition: opacity 0.3s ease;


}


.game-overlay.active {


    opacity: 1;


    pointer-events: auto;


}


.overlay-content {


    display: flex;


    flex-direction: column;


    align-items: center;


    gap: 4px;


}


.overlay-title {


    font-size: 28px;


    font-weight: 800;


    margin-bottom: 20px;


    color: var(--calm-green);


}





/* ---- Modal ---- */


.modal-overlay {


    position: fixed;


    inset: 0;


    z-index: 150;


    background: rgba(0, 0, 0, 0.7);


    backdrop-filter: blur(4px);


    -webkit-backdrop-filter: blur(4px);


    display: flex;


    align-items: center;


    justify-content: center;


    opacity: 0;


    pointer-events: none;


    transition: opacity 0.25s ease;


    padding: 20px;


}


.modal-overlay.active {


    opacity: 1;


    pointer-events: auto;


}


.modal-content {


    background: linear-gradient(170deg, #1e2a1e, #150f35);


    border: 1px solid rgba(126, 200, 160, 0.1);


    border-radius: 20px;


    padding: 28px 24px;


    max-width: 360px;


    width: 100%;


    max-height: 80vh;


    overflow-y: auto;


    position: relative;


    transform: scale(0.9);


    transition: transform 0.25s ease;


}


.modal-overlay.active .modal-content {


    transform: scale(1);


}


.modal-close {


    position: absolute;


    top: 12px;


    right: 16px;


    width: 32px;


    height: 32px;


    border: none;


    background: rgba(255, 255, 255, 0.08);


    color: var(--text-secondary);


    font-size: 20px;


    border-radius: 8px;


    cursor: pointer;


    display: flex;


    align-items: center;


    justify-content: center;


}


.modal-title {


    font-size: 22px;


    font-weight: 800;


    margin-bottom: 20px;


    color: var(--calm-green);


}





/* ---- Help Content ---- */


.help-section {


    margin-bottom: 16px;


    text-align: left;


}


.help-emoji-row {


    font-size: 22px;


    text-align: center;


    margin-bottom: 8px;


    letter-spacing: 4px;


    line-height: 1.6;


}


.help-text {


    font-size: 14px;


    color: var(--text-secondary);


    line-height: 1.6;


}





/* ---- Game Over ---- */


.gameover-title {


    font-size: 32px;


    font-weight: 800;


    margin-bottom: 16px;


    background: linear-gradient(135deg, var(--calm-green), var(--calm-blue));


    -webkit-background-clip: text;


    -webkit-text-fill-color: transparent;


    background-clip: text;


}





.final-score-block,


.final-best-block {


    margin-bottom: 8px;


}


.final-label {


    display: block;


    font-size: 12px;


    color: var(--text-secondary);


    text-transform: uppercase;


    letter-spacing: 1px;


    font-weight: 600;


}


.final-value {


    font-size: 48px;


    font-weight: 800;


    font-variant-numeric: tabular-nums;


    line-height: 1.1;


}


.final-value-small {


    font-size: 28px;


    color: var(--calm-gold);


}





.final-stats {


    display: flex;


    gap: 24px;


    margin: 20px 0 24px;


}


.final-stat {


    display: flex;


    flex-direction: column;


    align-items: center;


}


.final-stat-num {


    font-size: 24px;


    font-weight: 800;


}


.final-stat-label {


    font-size: 11px;


    color: var(--text-secondary);


    text-transform: uppercase;


    letter-spacing: 0.5px;


}





#new-best-badge {


    background: linear-gradient(135deg, var(--calm-green), var(--calm-blue));


    color: #0f1a12;


    font-size: 14px;


    font-weight: 800;


    padding: 6px 20px;


    border-radius: 20px;


    margin-bottom: 12px;


    animation: badge-pop 0.5s ease;


}


@keyframes badge-pop {


    0% { transform: scale(0); opacity: 0; }


    60% { transform: scale(1.2); }


    100% { transform: scale(1); opacity: 1; }


}





/* ---- Daily Complete Badge (game over) ---- */


.daily-complete-badge {


    background: linear-gradient(135deg, var(--calm-blue), var(--calm-purple));


    color: #fff;


    font-size: 14px;


    font-weight: 800;


    padding: 8px 24px;


    border-radius: 20px;


    margin-bottom: 16px;


    display: flex;


    flex-direction: column;


    align-items: center;


    gap: 4px;


    animation: badge-pop 0.5s ease;


}


.daily-streak-info {


    font-size: 12px;


    font-weight: 600;


    opacity: 0.8;


}





/* ---- Footer ---- */


.game-footer {


    margin-top: 24px;


    font-size: 11px;


    color: rgba(255, 255, 255, 0.25);


    letter-spacing: 0.5px;


    font-weight: 500;


}


.game-footer a {


    color: inherit;


    text-decoration: none;


}





/* ---- Hidden Utility ---- */


.hidden { display: none !important; }





/* ---- Sound muted indicator ---- */


.icon-btn.muted {


    opacity: 0.4;


}





/* ---- Ambient background glow ---- */


#app::before {


    content: '';


    position: absolute;


    top: 30%;


    left: 50%;


    width: 300px;


    height: 300px;


    transform: translateX(-50%);


    background: radial-gradient(circle, rgba(126, 200, 160, 0.06) 0%, transparent 70%);


    pointer-events: none;


    z-index: 0;


}





/* ---- Responsive: Desktop frame ---- */


@media (min-width: 421px) {


    body {


        display: flex;


        align-items: center;


        justify-content: center;


        background: #060512;


    }


    #app {


        border-radius: 24px;


        box-shadow: 0 0 80px rgba(126, 200, 160, 0.08);


        border: 1px solid rgba(255, 255, 255, 0.05);


        max-height: 900px;


    }


}





/* ---- Toast (no moves / shuffle) ---- */


.shuffle-toast {


    position: fixed;


    top: 40%;


    left: 50%;


    transform: translateX(-50%);


    background: rgba(126, 200, 160, 0.9);


    color: #0f1a12;


    font-size: 16px;


    font-weight: 800;


    padding: 12px 28px;


    border-radius: 24px;


    z-index: 300;


    pointer-events: none;


    animation: toast-in 0.4s ease-out;


    transition: opacity 0.4s ease, transform 0.4s ease;


    box-shadow: 0 4px 20px rgba(126, 200, 160, 0.3);


}





@keyframes toast-in {


    0% { transform: translateX(-50%) scale(0.5); opacity: 0; }


    100% { transform: translateX(-50%) scale(1); opacity: 1; }


}





/* ---- Safe Area ---- */


@supports (padding-top: env(safe-area-inset-top)) {


    #game-header {


        padding-top: calc(10px + env(safe-area-inset-top));


    }


}



/* ---- Spawn Timer ---- */
.spawn-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: 12px auto 0;
    max-width: 280px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.04);
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.06);
}

.spawn-timer-bar {
    flex: 1;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
}

.spawn-timer-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--calm-green), var(--calm-blue));
    border-radius: 3px;
    transition: width 0.1s linear;
    width: 100%;
}

.spawn-timer-text {
    font-size: 11px;
    font-weight: 600;
    color: rgba(255,255,255,0.5);
    white-space: nowrap;
    min-width: 85px;
    text-align: right;
}

.spawn-timer.daily-mode .spawn-timer-fill {
    background: linear-gradient(90deg, #ff6b6b, #ffa502);
}

.spawn-timer.daily-mode .spawn-timer-text {
    color: #ffa502;
}

/* ---- Daily Done Screen ---- */
#screen-daily-done .screen-content {
    gap: 8px;
}

#screen-daily-done h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--calm-green), var(--calm-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

#screen-daily-done .daily-badge {
    background: linear-gradient(135deg, var(--calm-blue), var(--calm-purple));
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 16px;
    margin-bottom: 8px;
}

#screen-daily-done p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 16px;
}

#screen-daily-done .stats {
    display: flex;
    gap: 32px;
    margin-bottom: 20px;
}

#screen-daily-done .stats .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#screen-daily-done .stats .stat span:first-child {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
}

#screen-daily-done .stats .stat span:last-child {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}