/* 
   Ring Sort Puzzle - V12.0 MODERN UI COMPLETE
   - Theme: Soft, Colorful, Modern (Child-Friendly)
   - Layout: Robust Overlay Architecture
   - Input: Global Window Listeners + Z-Index 5 Canvas
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;700;900&display=swap');

:root {
    /* PALETTE: Soft & Vibrant */
    --primary: #8B5CF6;
    /* Violet */
    --primary-light: #A78BFA;
    --primary-dark: #7C3AED;

    --accent: #F43F5E;
    /* Rose */
    --accent-light: #FB7185;

    --success: #10B981;
    /* Emerald */
    --success-dark: #059669;

    --warning: #F59E0B;
    /* Amber */

    --bg-color: #F8FAFC;
    /* Slate 50 */
    --surface: #FFFFFF;
    --text-main: #1E293B;
    /* Slate 800 */
    --text-muted: #64748B;
    /* Slate 500 */

    /* SHAPES */
    --radius-l: 32px;
    --radius-m: 20px;
    --radius-s: 12px;

    /* EFFECTS */
    --shadow-soft: 0 10px 40px -10px rgba(139, 92, 246, 0.15);
    --shadow-card: 0 20px 50px -12px rgba(0, 0, 0, 0.1);
    --shadow-btn: 0 8px 20px -6px rgba(139, 92, 246, 0.3);

    --bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    outline: none;
}

html {
    height: 100%;
    width: 100%;
    overflow: hidden;
    overscroll-behavior: none;
    /* Critical for preventing pull-to-refresh */
}

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
    width: 100%;
    height: 100%;
    background: #F0F5FF;
    /* Soft Blue-ish tint */
    background-image:
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(244, 63, 94, 0.05) 0%, transparent 40%);

    /* V15.0: Compliance Fixes (No Scroll/Select) */
    touch-action: none;
    overscroll-behavior: none;
    /* Double protection */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* =========================================
   LAYER 5: 3D CANVAS (Clickable)
   ========================================= */
#game-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    /* CLICKABLE */
    display: block;
    cursor: pointer;
    touch-action: none;
}

#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 6;
    pointer-events: none;
}

/* =========================================
   LAYER 20: UI OVERLAYS
   ========================================= */
#app {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 20;
    pointer-events: none;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.4s ease;
}

.screen.active {
    opacity: 1;
    visibility: visible;
}

/* Interactive Screens */
#main-menu,
#level-select {
    pointer-events: auto;
}

/* --- LOADING SCREEN --- */
#loading-screen {
    z-index: 999;
    background: var(--surface);
    pointer-events: auto;
}

.logo-rings {
    width: 120px;
    height: 120px;
    position: relative;
    margin-bottom: 2rem;
}

.ring {
    position: absolute;
    border: 12px solid transparent;
    border-radius: 50%;
    width: 100%;
    height: 100%;
    animation: spin 3s infinite linear;
    border-top-color: var(--primary);
}

.ring:nth-child(2) {
    width: 70%;
    height: 70%;
    top: 15%;
    left: 15%;
    border-top-color: var(--accent);
    animation-direction: reverse;
}

.ring:nth-child(3) {
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    border-top-color: var(--success);
}

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

/* --- BUTTON STYLES (Modern Pill) --- */
.btn {
    border: none;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
    font-size: 1.2rem;
    padding: 1.2rem 2.5rem;
    border-radius: var(--radius-l);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: transform 0.1s var(--bounce);
    position: relative;
    overflow: hidden;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-btn);
}

.btn-primary:active {
    box-shadow: none;
}

.btn-secondary {
    background: white;
    color: var(--text-main);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 3px solid transparent;
    min-width: 110px;
    padding: 14px 24px;
}

.btn-secondary:hover {
    border-color: #E2E8F0;
}

.btn-icon-only {
    width: 60px;
    height: 60px;
    padding: 0;
    border-radius: 50%;
    background: white;
    box-shadow: var(--shadow-soft);
    font-size: 1.5rem;
    color: var(--text-main);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    pointer-events: auto;
}

.btn-icon-only:active {
    transform: scale(0.9);
}

/* --- MAIN MENU --- */
#main-menu {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(15px);
}

.menu-card {
    background: var(--surface);
    padding: 3rem 2rem;
    border-radius: 40px;
    width: 90%;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    box-shadow: var(--shadow-card);
    pointer-events: auto;
    /* Ensure clickable */
    border: 1px solid white;
}

.game-title h1 {
    font-size: 4.5rem;
    line-height: 1;
    margin: 0;
    text-align: center;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 4px 0 rgba(0, 0, 0, 0.1));
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 5px;
    opacity: 0.8;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
}

.menu-buttons .btn {
    width: 100%;
    font-weight: 800;
    letter-spacing: 0.5px;
}

/* Stats Display */
.stats-display {
    display: flex;
    gap: 20px;
    width: 100%;
    justify-content: space-around;
    background: #F1F5F9;
    padding: 1.2rem;
    border-radius: var(--radius-m);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--text-main);
    line-height: 1;
    margin-bottom: 0.2rem;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Play Button specific size */
#btn-play {
    padding: 1.5rem;
    font-size: 1.5rem;
    letter-spacing: 1px;
}

/* --- GAME UI (HUD) --- */
/* CRITICAL: Ensure children are clickable even if screen is transparent */
#game-screen {
    pointer-events: none;
}

.game-header,
.game-footer {
    pointer-events: auto;
}

/* Fix for unclickable buttons */

.game-header {
    position: fixed;
    top: 20px;
    left: 0;
    width: 100%;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    z-index: 100 !important;
    /* Fixed: Ensure clickable */
    pointer-events: none;
}

.game-footer {
    position: fixed;
    bottom: 30px;
    left: 0;
    width: 100%;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    z-index: 1000 !important;
    /* Force Top Layer */
    pointer-events: none;
    height: 100px;
    /* Ensure non-zero height for positioning context */
}

.game-footer>* {
    pointer-events: auto !important;
    cursor: pointer;
}

.level-badge {
    pointer-events: auto;
    background: var(--surface);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-soft);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.level-badge span {
    display: block;
    line-height: 1;
}

.lbl {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.val {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
}

/* Updated Moves Badge: Side-by-Side */
.moves-badge {
    pointer-events: auto;
    background: var(--text-main);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-m);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 10px;
}

.moves-badge .lbl {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: #94A3B8;
    font-weight: 700;
}

.moves-badge .val {
    color: white;
    font-size: 2rem;
    font-weight: 900;
    line-height: 1;
}

/* --- MODALS (Settings & Complete) --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    pointer-events: auto;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--surface);
    width: 90%;
    max-width: 400px;
    padding: 2.5rem;
    border-radius: 40px;
    box-shadow: var(--shadow-card);
    text-align: center;
    transform: translateY(30px) scale(0.95);
    transition: 0.4s var(--bounce);
}

.modal.active .modal-card {
    transform: translateY(0) scale(1);
}

/* SETTINGS */
.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.settings-header h2 {
    margin: 0;
    font-size: 2rem;
    color: var(--text-main);
}

.btn-close {
    background: #F1F5F9;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: 0.2s;
}

.btn-close:hover {
    background: #E2E8F0;
    color: var(--accent);
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem;
    background: #F8FAFC;
    border-radius: var(--radius-m);
    margin-bottom: 1rem;
}

.setting-name {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* TOGGLE SWITCH (Big & Chunky) */
.toggle {
    position: relative;
    width: 64px;
    height: 36px;
    display: inline-block;
}

.toggle input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    cursor: pointer;
    z-index: 2;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #CBD5E1;
    transition: .3s;
    border-radius: 36px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 28px;
    width: 28px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .3s var(--bounce);
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

input:checked+.slider {
    background-color: var(--success);
}

input:checked+.slider:before {
    transform: translateX(28px);
}

/* LEVEL COMPLETE */
.victory-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
    display: block;
    animation: popIn 0.5s var(--bounce);
}

@keyframes popIn {
    0% {
        transform: scale(0);
    }

    70% {
        transform: scale(1.2);
    }

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

.star-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 1.5rem 0;
    font-size: 3.5rem;
}

.star {
    filter: drop-shadow(0 4px 0px rgba(0, 0, 0, 0.1));
    transform: scale(0);
    animation: starPop 0.4s var(--bounce) forwards;
}

.star:nth-child(1) {
    color: #CBD5E1;
    animation-delay: 0.2s;
}

.star:nth-child(2) {
    color: #CBD5E1;
    animation-delay: 0.4s;
}

.star:nth-child(3) {
    color: #CBD5E1;
    animation-delay: 0.6s;
}

.star.earned {
    color: var(--warning);
}

/* GOLD */
@keyframes starPop {
    to {
        transform: scale(1);
    }
}

.complete-msg {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.btn-next {
    width: 100%;
    padding: 1.5rem;
    font-size: 1.4rem;
    background: var(--success);
}

/* LEVEL GRID */
#level-select .header {
    display: flex;
    align-items: center;
    padding: 2rem;
    gap: 1rem;
}

#levels-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    padding: 20px;
    max-width: 500px;
    height: 75vh;
    overflow-y: auto;
    pointer-events: auto;
    /* V15.9: Enable touch scrolling on mobile */
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

.level-btn {
    aspect-ratio: 1;
    background: white;
    border: none;
    border-radius: var(--radius-m);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    pointer-events: auto;
}

.level-btn.locked {
    background: #F1F5F9;
    color: #CBD5E1;
    cursor: not-allowed;
    /* V15.10: Remove pointer-events: none to allow scroll on touch */
}

.level-btn.current {
    border: 4px solid var(--primary);
    color: var(--primary);
    transform: scale(1.05);
}

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

@media (max-width: 400px) {
    #levels-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .game-title h1 {
        font-size: 3rem;
    }
}

/* Language Buttons */
.btn-sm {
    padding: 5px 10px;
    font-size: 1.5rem;
    background: rgba(0, 0, 0, 0.05);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
}

.btn-sm:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: scale(1.1);
}

.lang-options {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Hint Button Badges */
#btn-hint {
    position: relative;
    overflow: visible;
}

.hint-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: white;
    color: var(--text-main);
    font-size: 0.8rem;
    font-weight: 900;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.ad-icon {
    position: absolute;
    bottom: -2px;
    right: -2px;
    font-size: 1rem;
    background: var(--primary);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
    z-index: 2;
}

.hidden {
    display: none !important;
}

/* Ad Badge for Hint Button */
#btn-hint {
    position: relative;
}

/* V15.13: Slightly Larger Buttons for Small Screens (preserve round shape) */
#btn-hint,
#btn-restart {
    min-width: 100px !important;
    min-height: 56px !important;
    padding: 16px 18px !important;
}

.ad-badge {
    position: absolute;
    bottom: -3px;
    right: -3px;
    font-size: 1.0rem;
    background: white;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* V15.0: Undo Button Ad Badge - Make it more visible */
#btn-undo {
    position: relative;
    overflow: visible;
}

#btn-undo .ad-badge {
    position: absolute;
    top: -3px;
    right: -3px;
    font-size: 1.3rem;
    background: white;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    border: none;
    z-index: 10;
}

/* V15.0: Failed Modal Icon */
.fail-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
    display: block;
    animation: popIn 0.5s var(--bounce);
}

/* V15.3: Extra Moves Button Ad Badge */
#btn-extra-moves {
    position: relative;
}

#btn-extra-moves .ad-badge {
    position: static;
    display: inline-block;
    margin-left: 8px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    width: auto;
    height: auto;
    padding: 2px 6px;
    box-shadow: none;
    border: none;
}