:root {
    --hnb-bg: #020408;
    --hnb-accent: #f472b6; /* Pink/Rose for fireworks spark */
    --hnb-glow: rgba(244, 114, 182, 0.4);
    --hnb-text: #f8fafc;
    
    /* Button Colors */
    --clr-small: #38bdf8;  /* Cyan */
    --clr-medium: #fbbf24; /* Amber */
    --clr-large: #f472b6;  /* Pink */
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body.hanabi-page {
    background-color: var(--hnb-bg);
    color: var(--hnb-text);
    font-family: 'Outfit', sans-serif;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#starfield-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -1;
}

.game-container {
    width: 100%;
    max-width: 1000px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    position: relative;
    z-index: 1;
}

/* Header */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.back-link {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.back-link:hover {
    color: var(--hnb-accent);
}

.game-title {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 4px;
    text-shadow: 0 0 15px var(--hnb-glow);
}

.game-title .accent {
    color: var(--hnb-accent);
}

/* Canvas Area */
.canvas-wrapper {
    flex-grow: 1;
    position: relative;
    margin: 1rem 0;
    border-radius: 24px;
    background: transparent;
    overflow: hidden;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
}

/* Overlays */
.intro-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(2, 4, 8, 0.85);
    backdrop-filter: blur(20px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    transition: opacity 1s ease;
}

.intro-overlay.active {
    display: flex;
    opacity: 1;
}

.overlay-content {
    text-align: center;
    max-width: 550px;
    padding: 2.5rem;
}

.shinto-icon {
    font-size: 3.5rem;
    color: var(--hnb-accent);
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 20px var(--hnb-glow));
    animation: floating 4s ease-in-out infinite;
}

@keyframes floating {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.massive-text {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 1rem;
    font-family: 'Outfit', sans-serif;
}

.mission-desc {
    font-family: 'Kaisei Opti', serif;
    font-size: 1.1rem;
    line-height: 2;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 3rem;
    letter-spacing: 0.05em;
}

.start-btn {
    background: transparent;
    color: var(--hnb-accent);
    border: 1px solid var(--hnb-accent);
    padding: 1.2rem 3rem;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.start-btn:hover {
    background: var(--hnb-accent);
    color: white;
    box-shadow: 0 0 30px var(--hnb-glow);
    transform: scale(1.05);
}

/* Footer & Controls */
.hanabi-footer {
    padding: 1rem 0 2rem 0;
}

.launch-controls {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.launch-btn {
    flex: 1;
    max-width: 140px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 1.2rem 0.5rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.launch-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--btn-clr);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s;
}

.launch-btn .btn-icon {
    font-size: 1.8rem;
    transition: transform 0.3s;
}

.launch-btn .btn-label {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.3s;
}

/* Specific Colors */
.btn-small { --btn-clr: var(--clr-small); }
.btn-medium { --btn-clr: var(--clr-medium); }
.btn-large { --btn-clr: var(--clr-large); }

.launch-btn:hover {
    transform: translateY(-8px);
    border-color: var(--btn-clr);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.launch-btn:hover .btn-label {
    color: white;
}

.launch-btn:active {
    transform: translateY(-2px) scale(0.95);
    background: var(--btn-clr);
}

.launch-btn:active .btn-icon,
.launch-btn:active .btn-label {
    color: white;
}

/* Mobile Adjustments */
@media (max-width: 600px) {
    .launch-controls {
        gap: 0.8rem;
    }
    .launch-btn {
        padding: 1rem 0.2rem;
    }
    .launch-btn .btn-icon {
        font-size: 1.5rem;
    }
    .massive-text {
        font-size: 2.2rem;
    }
    .mission-desc {
        font-size: 0.95rem;
    }
}