/* styles/main.css */
:root {
    --bg-top: #7ec8e3;
    --bg-bot: #1a7a9c;
    --panel: #fffef7;
    --ink: #2c3e50;
    --accent: #1abc9c;
    --accent-dark: #16a085;
    --good: #2ecc71;
    --font: "Fredoka", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body {
    margin: 0; padding: 0; min-height: 100%;
    font-family: var(--font); color: var(--ink);
    background: linear-gradient(180deg, var(--bg-top) 0%, #1a7a9c 100%);
    background-attachment: fixed; overflow: hidden; touch-action: none;
    user-select: none; -webkit-user-select: none;
}
#game-container {
    width: min(100vw, 520px); margin: 0 auto;
    min-height: 100vh; min-height: 100dvh;
    display: flex; flex-direction: column; align-items: center;
    padding: 0.6rem 0.6rem 1rem; gap: 0.4rem;
}
header {
    width: 100%; display: grid;
    grid-template-columns: auto 1fr auto; align-items: center; gap: 0.4rem;
}
.home-link {
    text-decoration: none; font-size: 1.4rem; line-height: 1;
    padding: 0.25rem 0.4rem; border-radius: 10px;
    background: rgba(255, 255, 255, 0.55);
}
h1 {
    margin: 0; font-size: clamp(1.15rem, 4.5vw, 1.55rem); font-weight: 700;
    text-align: center; color: #0e6655;
    text-shadow: 1px 1px 0 rgba(255, 255, 255, 0.6);
}
#stats {
    display: flex; flex-direction: column; align-items: flex-end;
    font-size: 0.75rem; font-weight: 600; line-height: 1.25;
    background: rgba(255, 255, 255, 0.55); padding: 0.3rem 0.5rem;
    border-radius: 10px; white-space: nowrap;
}
#combo { color: #8e44ad; }
main {
    position: relative; width: 100%; flex: 1;
    display: flex; justify-content: center; align-items: center; min-height: 0;
}
#gameCanvas {
    display: block; width: 100%; max-width: 480px; height: auto;
    max-height: min(70vh, 640px); border-radius: 18px; border: 4px solid #fff;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18); background: #1a5276;
    touch-action: none; cursor: pointer;
}
.overlay {
    position: absolute; inset: 0; display: flex; align-items: center;
    justify-content: center; background: rgba(30, 50, 80, 0.35);
    border-radius: 18px; padding: 1rem; transition: opacity 0.2s ease;
}
.overlay.hidden { display: none; }
.panel {
    background: var(--panel); border-radius: 20px; padding: 1.4rem 1.2rem;
    max-width: 320px; text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2); border: 3px solid #7ed6df;
}
.panel h2 { margin: 0 0 0.6rem; font-size: 1.6rem; color: #0e6655; }
.panel p { margin: 0 0 0.75rem; font-size: 1rem; line-height: 1.35; }
.panel .hint { font-size: 0.85rem; opacity: 0.75; margin-bottom: 1rem; }
#start-btn {
    font-family: var(--font); font-size: 1.25rem; font-weight: 700;
    padding: 0.7rem 2rem; border: none; border-radius: 999px;
    background: var(--accent); color: white; cursor: pointer;
    box-shadow: 0 5px 0 var(--accent-dark);
    transition: transform 0.08s ease, box-shadow 0.08s ease;
}
#start-btn:hover { filter: brightness(1.05); }
#start-btn:active { transform: translateY(4px); box-shadow: 0 1px 0 var(--accent-dark); }
.bottom-bar {
    width: 100%; max-width: 480px; display: flex; flex-direction: column;
    gap: 0.45rem; padding: 0.25rem 0.5rem 0; align-items: center;
}
.tip { margin: 0; font-size: 0.8rem; font-weight: 600; opacity: 0.75; text-align: center; }
#done-btn {
    font-family: var(--font); font-size: 1rem; font-weight: 700;
    padding: 0.65rem 1rem; border: none; border-radius: 999px;
    background: #2980b9; color: white; cursor: pointer;
    box-shadow: 0 4px 0 #1f618d; width: 100%;
}
#done-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 #1f618d; }
@media (max-height: 700px) {
    h1 { font-size: 1.1rem; }
    #stats { font-size: 0.68rem; }
    .tip { font-size: 0.72rem; }
}