/* ============================================
   SAHIRA — Main Menu Screen
   Colorful animated gradient + particle overlay
   ============================================ */

#screen-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(-45deg, #0a0a1a, #1a0a2e, #0a1a2e, #1a0a1a, #0e1a0e, #1a0a1e);
    background-size: 600% 600%;
    animation: gradientShift 20s ease infinite;
}

#particle-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* ── Menu Fullscreen Button ── */
.menu-fs-btn {
    position: absolute;
    top: max(var(--space-md), env(safe-area-inset-top));
    right: max(var(--space-md), env(safe-area-inset-right));
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.menu-fs-btn:hover {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
    border-color: var(--teal);
    box-shadow: var(--shadow-glow-teal);
    transform: scale(1.08);
}

.menu-fs-btn.active {
    color: var(--mint);
    border-color: var(--mint);
    box-shadow: var(--shadow-glow-teal);
    background: rgba(85, 239, 196, 0.15);
}

/* ── Menu Content ── */

.menu-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2xl);
    animation: scaleIn 1.2s var(--ease-out);
}

.menu-logo {
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

.menu-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 700;
    background: var(--gradient-tropical);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 6s ease infinite;
    filter: drop-shadow(0 0 40px rgba(253, 121, 168, 0.35))
            drop-shadow(0 0 80px rgba(162, 155, 254, 0.15));
    letter-spacing: 0.06em;
}

.menu-subtitle {
    font-family: var(--font-body);
    font-size: clamp(0.85rem, 2vw, 1.1rem);
    font-weight: 300;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    animation: fadeIn 1.5s ease 0.4s both;
}

/* ── Buttons ── */

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 300px;
    animation: slideUp 0.8s var(--ease-out) 0.3s both;
}

.menu-btn {
    position: relative;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-primary);
    background: var(--bg-glass);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-fast);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.menu-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.menu-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.menu-btn:hover::before {
    opacity: 0.2;
}

.menu-btn:active {
    transform: translateY(0) scale(0.97);
}

/* Each button glows a different color */
.menu-btn:nth-child(1)::before { background: var(--gradient-sunset); }
.menu-btn:nth-child(1):hover {
    border-color: var(--coral);
    box-shadow: 0 0 25px rgba(255, 107, 107, 0.35), 0 8px 30px rgba(0,0,0,0.3);
}

.menu-btn:nth-child(2)::before { background: var(--gradient-ocean); }
.menu-btn:nth-child(2):hover {
    border-color: var(--teal);
    box-shadow: 0 0 25px rgba(0, 206, 201, 0.35), 0 8px 30px rgba(0,0,0,0.3);
}

.menu-btn:nth-child(3)::before { background: var(--gradient-aurora); }
.menu-btn:nth-child(3):hover {
    border-color: var(--purple);
    box-shadow: 0 0 25px rgba(162, 155, 254, 0.35), 0 8px 30px rgba(0,0,0,0.3);
}

.menu-btn:nth-child(4)::before { background: var(--gradient-twilight); }
.menu-btn:nth-child(4):hover {
    border-color: var(--gold);
    box-shadow: 0 0 25px rgba(253, 203, 110, 0.35), 0 8px 30px rgba(0,0,0,0.3);
}

/* ── Footer ── */

.menu-footer {
    font-family: var(--font-body);
    font-size: 0.72rem;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    animation: fadeIn 2s ease 0.8s both;
}

/* ── Mobile Landscape (Heights <= 550px) ── */
@media screen and (max-height: 550px) {
    .menu-content {
        gap: var(--space-sm);
        padding-top: max(var(--space-sm), env(safe-area-inset-top));
        padding-bottom: max(var(--space-sm), env(safe-area-inset-bottom));
    }
    .menu-title {
        font-size: 2.8rem;
    }
    .menu-subtitle {
        font-size: 0.7rem;
        margin-top: 2px;
    }
    .menu-buttons {
        width: 240px;
        gap: 6px;
    }
    .menu-btn {
        padding: 7px 14px;
        font-size: 0.8rem;
    }
    .menu-footer {
        font-size: 0.65rem;
    }
}