:root {
    --primary-color: #ff3366;
    --secondary-color: #00e5ff;
    --dark-bg: #0b0c10;
    --panel-bg: rgba(15, 20, 30, 0.7);
    --text-main: #ffffff;
    --text-dim: #a0aab5;
    --glass-border: rgba(255, 255, 255, 0.15);
    --glow-shadow: 0 0 20px rgba(255, 51, 102, 0.5);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-drag: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--dark-bg);
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
    touch-action: none; /* Prevent scroll on mobile */
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Canvas Styling */
#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: radial-gradient(circle at center, #2b2e3b 0%, #17181f 100%);
    box-shadow: inset 0 0 50px rgba(0,0,0,0.8);
}

/* Background overlay for depth effects */
#bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    background: radial-gradient(circle, transparent 40%, rgba(0,0,0,0.6) 100%);
}

/* UI Panels */
.ui-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(5, 5, 10, 0.6);
    backdrop-filter: blur(8px);
    transition: opacity 0.4s ease;
}

.ui-panel.hidden {
    opacity: 0;
    pointer-events: none;
}

.panel-content {
    background: padding-box linear-gradient(135deg, rgba(30, 35, 50, 0.9), rgba(15, 20, 30, 0.8));
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 30px rgba(0, 229, 255, 0.1);
    max-width: 90%;
    width: 400px;
    transform: scale(1);
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* Typography & Titles */
h1 {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 5px;
    text-transform: uppercase;
    background: linear-gradient(to right, #ffffff, #a0aab5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.5));
}

h1 span {
    font-size: 2rem;
    background: linear-gradient(to right, var(--primary-color), #ff88a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.title-glow {
    color: var(--secondary-color);
    text-shadow: 0 0 15px rgba(0, 229, 255, 0.6);
}

.red-glow h2 {
    color: var(--primary-color);
    text-shadow: 0 0 15px rgba(255, 51, 102, 0.6);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-dim);
    margin-bottom: 30px;
}

/* Start Menu specific */
.game-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 10px;
}

.hole-graphic {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #1a1a1a, #000);
    box-shadow: 0 0 20px var(--primary-color), inset 0 0 15px #000;
    margin-bottom: 15px;
    animation: pulsate 2s infinite alternate;
}

@keyframes pulsate {
    0% { box-shadow: 0 0 15px rgba(255, 51, 102, 0.5), inset 0 0 20px #000; transform: scale(0.95); }
    100% { box-shadow: 0 0 30px rgba(255, 51, 102, 0.8), inset 0 0 10px #000; transform: scale(1.05); }
}

.tutorial-box {
    background: rgba(0,0,0,0.3);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 30px;
    border: 1px dashed rgba(255, 255, 255, 0.2);
}

.tutorial-box p {
    font-size: 0.95rem;
    margin-bottom: 10px;
    color: #e0e0e0;
}

.tutorial-box p:last-child {
    margin-bottom: 0;
}

.tut-icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), #ff6688);
    border: none;
    border-radius: 50px;
    padding: 16px 40px;
    color: white;
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(255, 51, 102, 0.3);
    transition: all 0.2s;
    text-transform: uppercase;
    width: 100%;
}

.btn-primary:active {
    transform: scale(0.95);
    box-shadow: 0 5px 10px rgba(255, 51, 102, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(45deg, #ff4d79, #ff809b);
}

/* Stats Rows */
.stats-row {
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 15px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat .label {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 5px;
}

.stat .val {
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
}

.hint {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

/* HUD System */
#hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hud-item {
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(4px);
    border-radius: 12px;
    padding: 10px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.score-box, .level-box {
    min-width: 100px;
}

.hud-item .label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.hud-item span:not(.label) {
    font-size: 1.8rem;
    font-weight: 900;
    color: #fff;
}

.time-box {
    position: relative;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    padding: 0;
    justify-content: center;
}

.timer-ring {
    position: relative;
    width: 60px;
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.timer-ring span {
    position: absolute;
    font-size: 1.4rem !important;
}

.ring-bg, .ring-progress {
    fill: none;
    stroke-width: 6;
}

.ring-bg {
    stroke: rgba(255, 255, 255, 0.1);
}

.ring-progress {
    stroke: var(--secondary-color);
    stroke-dasharray: 163; /* 2 * PI * 26 */
    stroke-dashoffset: 0;
    stroke-linecap: round;
    transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

.time-danger .ring-progress {
    stroke: var(--primary-color);
}

.time-danger span {
    color: var(--primary-color) !important;
    animation: flash 1s infinite alternate;
}

@keyframes flash {
    0% { opacity: 1; }
    100% { opacity: 0.5; }
}

/* Bottom HUD (Size Progress) */
.hud-bottom {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.size-indicator {
    width: 60%;
    max-width: 400px;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(4px);
    border-radius: 12px;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
}

.size-indicator .label {
    font-weight: 900;
    font-size: 1rem;
    color: var(--secondary-color);
}

.progress-bar {
    flex-grow: 1;
    height: 12px;
    background: rgba(0,0,0,0.5);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255,255,255,0.1);
}

#size-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--secondary-color), #00ffcc);
    border-radius: 6px;
    transition: width 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 10px var(--secondary-color);
}

/* Sound Toggle */
.sound-toggle {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--panel-bg);
    border: 1px solid var(--glass-border);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 101;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    backdrop-filter: blur(4px);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .hud-top { padding: 0; }
    .hud-item { padding: 8px 12px; }
    .hud-item span:not(.label) { font-size: 1.4rem; }
    .time-box { width: 55px; height: 55px; }
    .timer-ring { width: 50px; height: 50px; }
    .timer-ring svg { width: 50px; height: 50px; }
    .timer-ring circle { cx: 25; cy: 25; r: 21; }
    .timer-ring span { font-size: 1.1rem !important; }
    h1 { font-size: 2.2rem; }
    h1 span { font-size: 1.5rem; }
    .panel-content { padding: 30px 20px; }
}