:root {
    --bg-grad: linear-gradient(135deg, #070b19, #101836);
    --card-bg: #151e3f;
    --card-border: #23305c;
    --text-main: #e2e8f0;
    --text-sec: #a5b4fc;
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --success: #dcfce7;
    --success-border: #86efac;
    --error: #fee2e2;
    --error-border: #f87171;
    --input-bg: #0b0f24;
    --example-bg: #1e2954;
    --hover-bg: #1e2954;
    font-family: "Poppins", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-theme="light"] {
    --bg-grad: linear-gradient(135deg, #dbeafe, #eff6ff);
    --card-bg: #ffffff;
    --card-border: #c7d2fe;
    --text-main: #0f172a;
    --text-sec: #1e3a8a;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --input-bg: #ffffff;
    --example-bg: #f1f5f9;
    --hover-bg: #e0e7ff;
}

[data-theme="dark"] {
    --bg-grad: linear-gradient(135deg, #0f172a, #1e293b);
    --card-bg: #1e293b;
    --card-border: #334155;
    --text-main: #f8fafc;
    --text-sec: #93c5fd;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --input-bg: #0f172a;
    --example-bg: #334155;
    --hover-bg: #334155;
}

[data-theme="space"] {
    --bg-grad: linear-gradient(135deg, #070b19, #101836);
    --card-bg: #151e3f;
    --card-border: #23305c;
    --text-main: #e2e8f0;
    --text-sec: #a5b4fc;
    --primary: #6366f1;
    --primary-hover: #818cf8;
    --input-bg: #0b0f24;
    --example-bg: #1e2954;
    --hover-bg: #1e2954;
}

[data-theme="submarine"] {
    --bg-grad: linear-gradient(135deg, #0f172a, #083344);
    --card-bg: #164e63;
    --card-border: #0ea5e9;
    --text-main: #f0fdfa;
    --text-sec: #4ade80;
    --primary: #f97316;
    --primary-hover: #ea580c;
    --input-bg: #082f49;
    --example-bg: #155e75;
    --hover-bg: #115e59;
    --success: #f97316;
    --success-border: #16a34a;
}

[data-theme="ice"] {
    --bg-grad: linear-gradient(135deg, #f0f9ff, #dbeafe);
    --card-bg: #ffffff;
    --card-border: #93c5fd;
    --text-main: #1e3a8a;
    --text-sec: #3b82f6;
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --input-bg: #ffffff;
    --example-bg: #eff6ff;
    --hover-bg: #dbeafe;
}

[data-theme="ocean"] {
    --bg-grad: linear-gradient(135deg, #cffafe, #bae6fd);
    --card-bg: #f0fdfa;
    --card-border: #67e8f9;
    --text-main: #083344;
    --text-sec: #0891b2;
    --primary: #06b6d4;
    --primary-hover: #0891b2;
    --input-bg: #ffffff;
    --example-bg: #cffafe;
    --hover-bg: #bae6fd;
}

[data-theme="nature"] {
    --bg-grad: linear-gradient(135deg, #ecfdf5, #d1fae5);
    --card-bg: #ffffff;
    --card-border: #a7f3d0;
    --text-main: #064e3b;
    --text-sec: #047857;
    --primary: #10b981;
    --primary-hover: #059669;
    --input-bg: #ffffff;
    --example-bg: #ecfdf5;
    --hover-bg: #a7f3d0;
}

[data-theme="carrot"] {
    --bg-grad: linear-gradient(135deg, #fff7ed, #ffedd5);
    --card-bg: #ffffff;
    --card-border: #fb923c;
    --text-main: #14532d;
    --text-sec: #16a34a;
    --primary: #f97316;
    --primary-hover: #ea580c;
    --input-bg: #ffffff;
    --example-bg: #ffedd5;
    --hover-bg: #fdba74;
    --success: #22c55e;
    --success-border: #16a34a;
}

[data-theme="cotton"] {
    --bg-grad: linear-gradient(135deg, #ffe4f1, #ffd6ec);
    --card-bg: #fff7fb;
    --card-border: #ffb6d9;
    --text-main: #7a1f52;
    --text-sec: #d9468f;
    --primary: #ff69b4;
    --primary-hover: #ec4899;
    --input-bg: #ffffff;
    --example-bg: #ffe4f1;
    --hover-bg: #ffd6ec;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg-grad);
    background-attachment: fixed;
    background-size: cover;
    color: var(--text-main);
    transition: background 0.3s, color 0.3s;
    overflow: hidden;
    min-height: 100vh;
    width: 100vw;
}

.progress-bar-container { 
    width: 100%; 
    height: 16px; 
    background: var(--card-border); 
    border-radius: 8px; 
    overflow: hidden; 
}

.progress-bar { 
    height: 100%; 
    width: 0%; 
    background: var(--primary); 
    transition: width 0.3s, background-color 0.3s; 
}

.container {
    max-width: 960px;
    margin: 50px auto;
    background: var(--card-bg);
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    transition: background 0.3s;
    position: relative;
    z-index: 10;
}

h1 { font-size: 24px; margin: 0 0 18px; text-align: center; color: var(--text-sec); }

.controls { 
    display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 8px; align-items: center; 
}

button, input, select { 
    font-size: 15px; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--card-border); 
    background: var(--input-bg); color: var(--text-main); cursor: pointer; transition: 0.25s; font-family: inherit;
}

button:hover:not(:disabled), select:hover, input[type=file]:hover { 
    background: var(--hover-bg); border-color: var(--primary); 
}

button:disabled { opacity: 0.5; cursor: not-allowed; }

button.primary-btn { background: var(--primary); color: white; border: none; font-weight: 500; }
button.primary-btn:hover:not(:disabled) { background: var(--primary-hover); }

.progress { margin: 10px 0 20px 0; font-size: 14px; color: var(--text-sec); text-align: center; }

.card { 
    border-radius: 12px; padding: 22px; border: 1px solid var(--card-border); margin-bottom: 14px; background: var(--card-bg); 
}

.definition { font-size: 20px; margin-bottom: 14px; text-align: center; font-weight: 500; color: var(--text-sec); }
.small { font-size: 13px; color: var(--text-sec); line-height: 1.6; }

#gameCanvas {
    position: absolute; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 1;
    background: transparent;
}

#game-hud {
    position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
    width: 90%; max-width: 800px; display: flex; justify-content: space-between; align-items: center;
    background: var(--card-bg); padding: 15px 25px; border-radius: 12px;
    border: 1px solid var(--card-border); box-shadow: 0 5px 15px rgba(0,0,0,0.3); z-index: 5;
}

.hud-stats { font-weight: bold; display: flex; gap: 20px; color: var(--text-sec); }
.hud-target { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: 2px; }

.opt-btn { 
    padding: 10px 15px; border-radius: 10px; border: 1px solid var(--card-border); 
    background: var(--input-bg); color: var(--text-main); cursor: pointer; font-weight: bold;
}

.overlay {
    position: absolute; top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.85); z-index: 20; display: flex; flex-direction: column;
    justify-content: center; align-items: center; text-align: center;
}
.overlay h1 { font-size: 48px; margin-bottom: 10px; }
.overlay p { font-size: 22px; margin-bottom: 30px; font-weight: 600; color: #ffffff !important; white-space: pre-line; }