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

:root {
    --primary: #FF5C00;
    --text-main: #3D3A5C;
    --bg-body: #F3F1F7;
    --white-glass: rgba(255, 255, 255, 0.82);
    --border-glass: rgba(90, 86, 130, 0.22);
    --shadow-soft: 0 10px 28px rgba(61, 58, 92, 0.08);
    --shadow-panel: 0 20px 50px rgba(61, 58, 92, 0.1);
    --shadow-toast: 0 14px 32px rgba(61, 58, 92, 0.1);
    --shadow-btn: 0 10px 25px rgba(255, 92, 0, 0.4), inset 0 -4px 0 rgba(0, 0, 0, 0.1);
    --shadow-btn-hover: 0 15px 35px rgba(255, 92, 0, 0.5), inset 0 -4px 0 rgba(0, 0, 0, 0.1);
    --shadow-btn-active: 0 5px 15px rgba(255, 92, 0, 0.3), inset 0 0 0 rgba(0, 0, 0, 0.1);
    --radius-sm: 16px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-pill: 50px;
    --blur-glass: blur(10px);
    --blur-overlay: blur(14px);
    --ease-pop: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --font-display: 'Fredoka One', cursive;
    --font-body: 'Nunito', sans-serif;
    --key-idle: #B0ADC4;
    --key-0: #FF5C00;
    --key-1: #FFEB00;
    --key-2: #FF3D00;
    --key-3: #FFF44F;
    /* Panel / toast scale — keeps desktop proportions */
    --ui-scale: 1;
    /* HUD controls scale — applied per group so edges stay flush */
    --hud-scale: 1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

html,
body {
    width: 100%;
    height: 100%;
}

body {
    background: var(--bg-body);
    overflow: hidden;
    font-family: var(--font-body);
    touch-action: none;
    color: var(--text-main);
}

#scene-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 60% at 18% 22%, rgba(186, 230, 214, 0.7) 0%, transparent 55%),
        radial-gradient(ellipse 70% 55% at 82% 18%, rgba(196, 210, 245, 0.75) 0%, transparent 52%),
        radial-gradient(ellipse 65% 50% at 78% 78%, rgba(232, 200, 220, 0.7) 0%, transparent 55%),
        radial-gradient(ellipse 55% 45% at 22% 82%, rgba(245, 228, 180, 0.55) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 48%, rgba(220, 210, 245, 0.45) 0%, transparent 55%),
        linear-gradient(160deg, #F7F5FA 0%, #F0EEF6 45%, #F5F2F8 100%);
}

.bg-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(64px);
}

.bg-orb-a {
    width: 46vmax;
    height: 46vmax;
    top: -12%;
    left: -10%;
    background: #B8E8D4;
    opacity: 0.55;
}

.bg-orb-b {
    width: 42vmax;
    height: 42vmax;
    top: -8%;
    right: -12%;
    background: #B8D0F0;
    opacity: 0.5;
}

.bg-orb-c {
    width: 40vmax;
    height: 40vmax;
    bottom: -14%;
    right: -8%;
    background: #E8C4D8;
    opacity: 0.48;
}

.bg-orb-d {
    width: 36vmax;
    height: 36vmax;
    bottom: -10%;
    left: -6%;
    background: #F0E0A8;
    opacity: 0.4;
}

.bg-orb-e {
    width: 28vmax;
    height: 28vmax;
    top: 38%;
    left: 28%;
    background: #D4C8F0;
    opacity: 0.42;
}

.bg-orb-f {
    width: 24vmax;
    height: 24vmax;
    top: 52%;
    right: 22%;
    background: #C8E8F0;
    opacity: 0.38;
}

.bg-glow {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.55) 0%, transparent 38%),
        radial-gradient(ellipse 100% 90% at 50% 50%, transparent 55%, rgba(210, 205, 230, 0.28) 100%);
}

#gameCanvas {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1;
}

#ui-layer {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(243, 241, 247, 0.45);
    backdrop-filter: var(--blur-overlay);
    -webkit-backdrop-filter: var(--blur-overlay);
    z-index: 20;
    transition: opacity 0.5s ease, visibility 0.5s;
}

#ui-layer.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.panel,
.status-pill,
.icon-btn,
#toast-overlay {
    background: var(--white-glass);
    border: 1.5px solid var(--border-glass);
}

.panel {
    padding: 32px 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
    text-align: center;
    width: 480px;
    flex-shrink: 0;
    transform: scale(var(--ui-scale));
    transform-origin: center center;
    animation: bounceIn 0.6s var(--ease-pop);
}

@keyframes bounceIn {
    0% { transform: scale(calc(var(--ui-scale) * 0.8)); opacity: 0; }
    100% { transform: scale(var(--ui-scale)); opacity: 1; }
}

.panel-title {
    margin-bottom: 10px;
}

.game-logo {
    display: block;
    width: min(100%, 280px);
    height: auto;
    margin: 0 auto;
    border-radius: 12px;
}

h1 {
    font-family: var(--font-display);
    font-size: 3.5rem;
    color: var(--text-main);
    margin-bottom: 0;
    letter-spacing: 1px;
}

p {
    font-size: 1.15rem;
    color: var(--text-main);
    margin-bottom: 24px;
    line-height: 1.6;
    font-weight: 700;
}

.highlight {
    color: var(--primary);
    font-weight: 900;
}

button.primary {
    padding: 16px 50px;
    font-size: 1.5rem;
    font-family: var(--font-display);
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    box-shadow: var(--shadow-btn);
    transition: transform 0.2s var(--ease-pop), box-shadow 0.2s var(--ease-pop);
    letter-spacing: 2px;
    width: 100%;
}

button.primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-btn-hover);
}

button.primary:active {
    transform: translateY(2px);
    box-shadow: var(--shadow-btn-active);
}

#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 10px 12px;
    padding-top: max(10px, env(safe-area-inset-top, 0px));
    padding-left: max(12px, env(safe-area-inset-left, 0px));
    padding-right: max(12px, env(safe-area-inset-right, 0px));
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: flex-start;
    gap: 8px;
    z-index: 10;
    pointer-events: none;
    transition: opacity 0.3s, visibility 0.3s;
}

#hud.hidden {
    opacity: 0;
    visibility: hidden;
}

#hud.hidden .hud-left,
#hud.hidden .hud-controls {
    pointer-events: none;
}

.hud-left {
    display: flex;
    align-items: center;
    gap: 4px;
    justify-self: start;
    pointer-events: all;
    transform: scale(var(--hud-scale));
    transform-origin: top left;
}

.hud-center {
    justify-self: center;
    transform: scale(var(--hud-scale));
    transform-origin: top center;
}

.status-pill {
    height: 44px;
    padding: 0 14px;
    border-radius: 10px;
    font-weight: 900;
    font-size: 1.1rem;
    color: var(--text-main);
    box-shadow: var(--shadow-soft);
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
}

.hud-center .status-pill {
    height: 48px;
    padding: 0 18px;
    font-size: 1.35rem;
    gap: 16px;
}

.status-pill > span i {
    color: var(--primary);
    font-size: 1.15rem;
}

.hud-center .status-pill > span i {
    font-size: 1.4rem;
}

.key-tracker {
    display: flex;
    align-items: center;
    gap: 10px;
}

.hud-center .key-tracker {
    gap: 12px;
}

.key-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.hud-center .key-group {
    gap: 8px;
}

.key-icon {
    transition: transform 0.4s var(--ease-pop), color 0.4s var(--ease-pop), opacity 0.4s var(--ease-pop);
    color: var(--key-idle);
    opacity: 0.5;
    font-size: 1.15rem;
}

.hud-center .key-icon {
    font-size: 1.4rem;
}

.key-icon.active {
    opacity: 1;
    transform: scale(1.25);
    text-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.key-icon.key-0.active { color: var(--key-0); }
.key-icon.key-1.active { color: var(--key-1); }
.key-icon.key-2.active { color: var(--key-2); }
.key-icon.key-3.active { color: var(--key-3); }

.hud-controls {
    display: flex;
    gap: 4px;
    justify-self: end;
    pointer-events: all;
    transform: scale(var(--hud-scale));
    transform-origin: top right;
}

.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.15rem;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s var(--ease-pop), box-shadow 0.2s var(--ease-pop), filter 0.2s var(--ease-pop);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
}

#home-btn { color: var(--key-0); }
#undo-btn { color: #6B67B5; }
#restart-btn { color: var(--key-2); }
#solve-btn { color: var(--text-main); }

.icon-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 32px rgba(61, 58, 92, 0.12);
    filter: brightness(1.12);
}

.icon-btn:active {
    transform: translateY(1px);
    box-shadow: 0 4px 12px rgba(61, 58, 92, 0.08);
    filter: brightness(0.96);
}

#toast-overlay {
    position: absolute;
    bottom: max(40px, env(safe-area-inset-bottom, 0px));
    left: 50%;
    padding: 15px 40px;
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: var(--font-display);
    font-size: 1.2rem;
    box-shadow: var(--shadow-toast);
    z-index: 15;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    text-align: center;
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    transform: translateX(-50%) scale(var(--ui-scale));
    transform-origin: bottom center;
}

#toast-overlay.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(-10px) scale(var(--ui-scale));
}

/* ── Mobile gate — same panel / proportions as desktop menu ── */
#mobile-gate {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(243, 241, 247, 0.92);
    backdrop-filter: var(--blur-overlay);
    -webkit-backdrop-filter: var(--blur-overlay);
    transition: opacity 0.3s ease, visibility 0.3s;
}

#mobile-gate.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#mobile-gate .panel p {
    margin-bottom: 0;
}

body.mobile-blocked #ui-layer,
body.mobile-blocked #hud,
body.mobile-blocked #toast-overlay,
body.mobile-blocked #gameCanvas {
    pointer-events: none !important;
}

/* ═══════════════════════════════════════════
   Responsive breakpoints
   ═══════════════════════════════════════════ */

/* Tablet Landscape (769px – 1024px) */
@media (max-width: 1024px) and (min-width: 769px) {
    :root {
        --ui-scale: 0.92;
        --hud-scale: 1.22;
    }

    #hud {
        padding: 14px 16px;
        padding-top: max(14px, env(safe-area-inset-top, 0px));
        padding-left: max(16px, env(safe-area-inset-left, 0px));
        padding-right: max(16px, env(safe-area-inset-right, 0px));
        gap: 10px;
    }
}

/* Tablet Portrait (641px – 768px) — iPad */
@media (max-width: 768px) and (min-width: 641px) {
    :root {
        --ui-scale: 0.9;
        --hud-scale: 1.28;
    }

    #hud {
        padding: 14px 16px;
        padding-top: max(14px, env(safe-area-inset-top, 0px));
        padding-left: max(16px, env(safe-area-inset-left, 0px));
        padding-right: max(16px, env(safe-area-inset-right, 0px));
        gap: 10px;
    }
}

/* Larger iPads (e.g. Pro portrait / landscape) */
@media (min-width: 820px) and (max-width: 1366px) and (pointer: coarse) {
    :root {
        --hud-scale: 1.3;
    }

    #hud {
        padding: 16px 18px;
        padding-top: max(16px, env(safe-area-inset-top, 0px));
        padding-left: max(18px, env(safe-area-inset-left, 0px));
        padding-right: max(18px, env(safe-area-inset-right, 0px));
    }
}

/* Mobile (≤640px) */
@media (max-width: 640px) {
    :root {
        --ui-scale: 0.72;
        --hud-scale: 1;
    }
}

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
    :root {
        --ui-scale: 0.62;
        --hud-scale: 0.95;
    }
}

/* Landscape Mobile */
@media (orientation: landscape) and (max-height: 500px) {
    :root {
        --ui-scale: 0.58;
        --hud-scale: 0.9;
    }
}

/* Tablet landscape with enough height */
@media (orientation: landscape) and (min-height: 501px) and (max-width: 1024px) {
    :root {
        --ui-scale: 0.92;
        --hud-scale: 1.2;
    }
}

/* Desktop (≥1025px), fine pointer — full size, no tablet boost */
@media (min-width: 1025px) and (pointer: fine) {
    :root {
        --ui-scale: 1;
        --hud-scale: 1;
    }
}