/**

 * Chain Pop - Mobile-First Chain Reaction 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.

 */



:root {

    --bg-dark: #0f0c29;

    --bg-mid: #1a1640;

    --bg-board: rgba(255, 255, 255, 0.04);

    --text-primary: #fff;

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

    --accent: #ffd93d;

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

    --danger: #ff4757;

    --danger-glow: rgba(255, 71, 87, 0.5);

    --success: #2ed573;

    --cell-size: 42px;

    --cell-gap: 3px;

    --cell-radius: 50%;

    --transition-fast: 150ms;

    --transition-normal: 300ms;

}



*, *::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, #1a1640 0%, #0f0c29 40%, #1e1245 100%);

}



/* ---- Screen system ---- */

.screen {

    position: absolute;

    inset: 0;

    display: flex;

    flex-direction: column;

    opacity: 0;

    pointer-events: none;

    transition: opacity 0.3s 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;

}



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

.game-logo {

    display: flex;

    gap: 4px;

    margin-bottom: 16px;

    align-items: center;

}

.logo-bubble {

    font-size: 28px;

    animation: logo-float 2.5s ease-in-out infinite;

    filter: drop-shadow(0 2px 6px rgba(255, 255, 255, 0.15));

}

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

.logo-bubble-2 { animation-delay: 0.2s; }

.logo-bubble-3 { animation-delay: 0.4s; }

.logo-bubble-4 { animation-delay: 0.6s; }

.logo-bubble-5 { animation-delay: 0.8s; }



@keyframes logo-float {

    0%, 100% { transform: translateY(0) scale(1); }

    30% { transform: translateY(-8px) scale(1.1); }

    60% { transform: translateY(3px) scale(0.95); }

}



.game-title {

    font-size: 52px;

    font-weight: 800;

    letter-spacing: -1px;

    line-height: 1;

    background: linear-gradient(135deg, #fff 0%, #ffd93d 50%, #ff6b9d 100%);

    -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: 24px;

}

.menu-best {

    font-size: 18px;

    color: var(--accent);

    margin-bottom: 16px;

    font-weight: 600;

}



/* ---- Settings Row ---- */

.settings-row {

    display: flex;

    gap: 12px;

    margin-top: 16px;

    align-items: center;

}

.pause-settings {

    margin-top: 20px;

}



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

.game-footer {

    margin-top: 16px;

    font-size: 11px;

    color: rgba(255, 255, 255, 0.35);

    letter-spacing: 0.5px;

    font-weight: 500;

    flex-shrink: 0;

}

.game-footer a {

    color: inherit;

    text-decoration: none;

}



/* ---- 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;

}

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

.btn-primary {

    background: linear-gradient(135deg, #ffd93d, #ff9f43);

    color: #1a1640;

    box-shadow: 0 4px 20px rgba(255, 217, 61, 0.3);

}

.btn-primary:active { box-shadow: 0 2px 10px rgba(255, 217, 61, 0.2); }

.btn-secondary {

    background: rgba(255, 255, 255, 0.1);

    color: var(--text-secondary);

    margin-top: 12px;

    font-size: 16px;

    padding: 12px 32px;

}



.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: 32px; height: 32px; font-size: 14px; }

.icon-btn.off { opacity: 0.4; }



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

#screen-game { display: flex; flex-direction: column; }



#game-header {

    display: flex;

    align-items: center;

    padding: 10px 8px 6px;

    gap: 6px;

    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;

    align-items: center;

    justify-content: center;

    min-width: 40px;

}



/* ---- Combo Display ---- */

#combo-display {

    text-align: center;

}

.combo-text {

    font-size: 20px;

    font-weight: 800;

    color: var(--accent);

    text-shadow: 0 0 12px var(--accent-glow);

    animation: combo-pulse 0.4s ease-out;

}

@keyframes combo-pulse {

    0% { transform: scale(1.6); opacity: 0; }

    50% { transform: scale(1.1); }

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

}



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

#board-wrapper {

    flex: 1;

    display: flex;

    align-items: center;

    justify-content: center;

    padding: 4px;

    position: relative;

    overflow: hidden;

}



#board {

    display: grid;

    grid-template-columns: repeat(8, var(--cell-size));

    grid-template-rows: repeat(10, var(--cell-size));

    gap: var(--cell-gap);

    background: var(--bg-board);

    border-radius: 14px;

    padding: 6px;

    box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.3);

    position: relative;

}



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

.cell {

    width: var(--cell-size);

    height: var(--cell-size);

    border-radius: 50%;

    display: flex;

    align-items: center;

    justify-content: center;

    cursor: pointer;

    transition: transform 0.15s ease, opacity 0.15s ease;

    position: relative;

    overflow: hidden;

}

.cell:active {

    transform: scale(0.9);

}

.cell.empty {

    background: rgba(255, 255, 255, 0.03);

    cursor: default;

    pointer-events: none;

}



/* Bubble colors */

.cell.color-0 { background: radial-gradient(circle at 35% 35%, #ff6b6b, #e03131); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(224,49,49,0.3); }

.cell.color-1 { background: radial-gradient(circle at 35% 35%, #ffa94d, #e8590c); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(232,89,12,0.3); }

.cell.color-2 { background: radial-gradient(circle at 35% 35%, #ffe066, #f59f00); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(245,159,0,0.3); }

.cell.color-3 { background: radial-gradient(circle at 35% 35%, #69db7c, #2f9e44); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(47,158,68,0.3); }

.cell.color-4 { background: radial-gradient(circle at 35% 35%, #74c0fc, #1c7ed6); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(28,126,214,0.3); }

.cell.color-5 { background: radial-gradient(circle at 35% 35%, #da77f2, #9c36b5); box-shadow: inset 0 -2px 4px rgba(0,0,0,0.2), 0 1px 4px rgba(156,54,181,0.3); }



/* Bubble highlight */

.cell:not(.empty):not(.powerup)::before {

    content: '';

    position: absolute;

    top: 5px;

    left: 8px;

    width: 12px;

    height: 8px;

    background: radial-gradient(ellipse, rgba(255,255,255,0.6) 0%, transparent 70%);

    border-radius: 50%;

    pointer-events: none;

}



/* Power-up cells */

.cell.powerup {

    animation: powerup-glow 1.5s ease-in-out infinite;

    font-size: 22px;

    background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.15), rgba(255,255,255,0.05));

    box-shadow: 0 0 12px rgba(255, 217, 61, 0.4);

}

@keyframes powerup-glow {

    0%, 100% { box-shadow: 0 0 8px rgba(255, 217, 61, 0.3); }

    50% { box-shadow: 0 0 18px rgba(255, 217, 61, 0.6); }

}



/* Pop animation */

.cell.popping {

    animation: bubble-pop 0.3s ease-out forwards;

    pointer-events: none;

}

@keyframes bubble-pop {

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

    40% { transform: scale(1.2); opacity: 0.8; }

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

}



/* Fall animation */

.cell.falling {

    transition: none;

    animation: bubble-fall 0.25s ease-in;

}

@keyframes bubble-fall {

    0% { transform: translateY(calc(-1 * (var(--cell-size) + var(--cell-gap)))); }

    100% { transform: translateY(0); }

}



/* New row slide-in */

.cell.slide-in {

    animation: slide-up 0.3s ease-out;

}

@keyframes slide-up {

    0% { transform: translateY(calc(var(--cell-size) + var(--cell-gap))); opacity: 0; }

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

}



/* Highlight valid clusters on hover */

.cell.highlight {

    filter: brightness(1.3);

    transform: scale(1.05);

}



/* Can't pop indicator */

.cell.invalid-tap {

    animation: shake 0.3s ease;

}

@keyframes shake {

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

    25% { transform: translateX(-3px); }

    75% { transform: translateX(3px); }

}



/* ---- Tap Counter ---- */

#tap-counter {

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 6px;

    padding: 8px;

    font-size: 13px;

    color: var(--text-secondary);

}

.tap-label {

    font-weight: 500;

}

.tap-count {

    font-size: 18px;

    font-weight: 800;

    color: var(--accent);

    font-variant-numeric: tabular-nums;

}

#tap-counter.warning .tap-count {

    color: var(--danger);

    animation: pulse-warn 0.5s ease-in-out infinite;

}

@keyframes pulse-warn {

    0%, 100% { opacity: 1; }

    50% { opacity: 0.5; }

}



/* ---- Score Popups ---- */

.score-popup {

    position: absolute;

    pointer-events: none;

    font-size: 18px;

    font-weight: 800;

    color: var(--accent);

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

    z-index: 30;

    animation: float-up 1s ease-out forwards;

    white-space: nowrap;

}

@keyframes float-up {

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

    70% { opacity: 1; }

    100% { opacity: 0; transform: translateY(-50px) scale(0.7); }

}



/* ---- Center Combo Text ---- */

.center-combo {

    position: absolute;

    top: 50%;

    left: 50%;

    transform: translate(-50%, -50%) scale(0);

    font-size: 36px;

    font-weight: 900;

    color: var(--accent);

    text-shadow: 0 0 20px var(--accent-glow), 0 2px 8px rgba(0, 0, 0, 0.5);

    z-index: 40;

    pointer-events: none;

    animation: combo-appear 0.8s ease-out forwards;

    white-space: nowrap;

}

@keyframes combo-appear {

    0% { transform: translate(-50%, -50%) scale(0) rotate(-5deg); opacity: 0; }

    30% { transform: translate(-50%, -50%) scale(1.3) rotate(2deg); opacity: 1; }

    60% { transform: translate(-50%, -50%) scale(1) rotate(0deg); opacity: 1; }

    100% { transform: translate(-50%, -50%) scale(0.8) rotate(0deg); opacity: 0; }

}



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

#particles {

    position: fixed;

    inset: 0;

    pointer-events: none;

    z-index: 100;

    overflow: hidden;

}

.particle {

    position: absolute;

    width: 6px;

    height: 6px;

    border-radius: 50%;

    pointer-events: none;

    animation: particle-fly 0.6s ease-out forwards;

}

@keyframes particle-fly {

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

    100% { opacity: 0; transform: translate(var(--px), var(--py)) scale(0); }

}



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

.game-overlay {

    position: absolute;

    inset: 0;

    z-index: 50;

    background: rgba(0, 0, 0, 0.75);

    backdrop-filter: blur(6px);

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

    display: flex;

    align-items: center;

    justify-content: center;

    opacity: 0;

    pointer-events: none;

    transition: opacity 0.2s 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;

}



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

.modal-overlay {

    position: absolute;

    inset: 0;

    z-index: 60;

    background: rgba(0, 0, 0, 0.8);

    backdrop-filter: blur(8px);

    -webkit-backdrop-filter: blur(8px);

    display: flex;

    align-items: center;

    justify-content: center;

    opacity: 0;

    pointer-events: none;

    transition: opacity 0.2s ease;

    padding: 20px;

}

.modal-overlay.active {

    opacity: 1;

    pointer-events: auto;

}

.modal-content {

    background: linear-gradient(170deg, #251e5a 0%, #1a1640 100%);

    border-radius: 20px;

    padding: 28px 24px;

    max-width: 340px;

    width: 100%;

    position: relative;

    border: 1px solid rgba(255, 255, 255, 0.08);

    max-height: 80vh;

    overflow-y: auto;

}

.modal-close {

    position: absolute;

    top: 12px;

    right: 12px;

    width: 32px;

    height: 32px;

    border: none;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.1);

    color: var(--text-secondary);

    font-size: 14px;

    cursor: pointer;

    display: flex;

    align-items: center;

    justify-content: center;

}

.modal-title {

    font-size: 22px;

    font-weight: 800;

    margin-bottom: 16px;

    text-align: center;

}

.help-section {

    margin-bottom: 14px;

}

.help-emoji-row {

    font-size: 24px;

    text-align: center;

    margin-bottom: 8px;

    letter-spacing: 4px;

}

.help-text {

    font-size: 14px;

    color: var(--text-secondary);

    line-height: 1.5;

    text-align: center;

}

.help-text strong {

    color: var(--text-primary);

}



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

.gameover-title {

    font-size: 32px;

    font-weight: 800;

    margin-bottom: 8px;

    background: linear-gradient(135deg, #fff 0%, #ffd93d 50%, #ff6b9d 100%);

    -webkit-background-clip: text;

    -webkit-text-fill-color: transparent;

    background-clip: text;

}

#new-best-badge {

    font-size: 18px;

    font-weight: 700;

    color: var(--accent);

    background: rgba(255, 217, 61, 0.15);

    padding: 6px 20px;

    border-radius: 20px;

    margin-bottom: 16px;

    animation: badge-pop 0.5s ease-out;

}

@keyframes badge-pop {

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

    60% { transform: scale(1.2); }

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

}

.hidden { display: none !important; }



.final-score-block, .final-best-block { margin-bottom: 6px; }

.final-label {

    display: block;

    font-size: 12px;

    color: var(--text-secondary);

    text-transform: uppercase;

    letter-spacing: 1px;

    font-weight: 600;

}

.final-value {

    font-size: 52px;

    font-weight: 800;

    line-height: 1.1;

    font-variant-numeric: tabular-nums;

}

.final-value-small {

    font-size: 26px;

    color: var(--text-secondary);

}

.final-stats {

    display: flex;

    gap: 20px;

    margin: 20px 0 16px;

}

.final-stat {

    display: flex;

    flex-direction: column;

    align-items: center;

}

.final-stat-num {

    font-size: 22px;

    font-weight: 800;

    font-variant-numeric: tabular-nums;

}

.final-stat-label {

    font-size: 10px;

    color: var(--text-secondary);

    text-transform: uppercase;

    letter-spacing: 0.5px;

    margin-top: 2px;

}



.motivation-text {

    font-size: 15px;

    color: var(--accent);

    font-weight: 600;

    margin-bottom: 12px;

}



/* ---- Back to Games ---- */

.back-to-games-inline {

    display: inline-block;

    color: rgba(255, 255, 255, 0.35);

    text-decoration: none;

    font-size: 13px;

    font-weight: 600;

    padding: 6px 14px;

    border-radius: 10px;

    margin-bottom: 12px;

    transition: color 150ms, background 150ms;

}

.back-to-games-inline:active {

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

    color: #fff;

}

.gameover-back {

    margin-top: 12px;

    margin-bottom: 0;

}



/* ---- Danger indicator ---- */

#board.danger-zone {

    animation: danger-flash 0.5s ease-in-out infinite;

}

@keyframes danger-flash {

    0%, 100% { box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.3); }

    50% { box-shadow: inset 0 0 30px rgba(255, 71, 87, 0.3), 0 0 20px rgba(255, 71, 87, 0.2); }

}



/* ---- Shuffle ---- */

#board.shuffle-flash {

    animation: shuffle-flash 0.5s ease-out;

}

@keyframes shuffle-flash {

    0%   { filter: brightness(1.8) saturate(0.3); }

    50%  { filter: brightness(1.2) saturate(0.8); }

    100% { filter: brightness(1) saturate(1); }

}



/* ---- Responsive ---- */

@media (min-width: 421px) {

    body {

        display: flex;

        align-items: center;

        justify-content: center;

        background: #080620;

    }

    #app {

        border-radius: 24px;

        box-shadow: 0 0 60px rgba(30, 20, 80, 0.5);

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

        max-height: 900px;

    }

}



@media (max-width: 380px) {

    :root {

        --cell-size: 36px;

        --cell-gap: 2px;

    }

}



@media (max-height: 650px) {

    :root {

        --cell-size: 34px;

        --cell-gap: 2px;

    }

    .screen-content { padding: 24px 16px; }

    .game-title { font-size: 40px; }

}



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

    #game-header {

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

    }

}