:root {
    --primary: #2563eb;      /* Blue 600 */
    --primary-hover: #1d4ed8; /* Blue 700 */
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.6);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --shadow-soft: 0 10px 40px -10px rgba(0,0,0,0.08);
    --shadow-glow: 0 20px 40px -10px rgba(37, 99, 235, 0.15);
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    background-attachment: fixed;
}

/* Glassmorphism Components */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

aside {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: 4px 0 24px rgba(0,0,0,0.02);
}

/* Form Elements */
select {
    background-color: rgba(255, 255, 255, 0.9) !important;
    border: 1px solid rgba(226, 232, 240, 0.8) !important;
    color: var(--text-main) !important;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.01);
    transition: all 0.3s ease;
}

select:hover {
    border-color: #cbd5e1 !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

/* Furniture Buttons (Cards) */
.furniture-btn-compact {
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(226, 232, 240, 0.6);
    backdrop-filter: blur(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.furniture-btn-compact:hover {
    border-color: var(--primary);
    background: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.1);
}

/* Canvas Area */
#canvasContainer {
    /* Use transparent so the beautiful body gradient shows through */
    background: transparent;
    background-image: radial-gradient(circle at 50% 50%, rgba(79, 70, 229, 0.03) 0%, transparent 60%);
}

.canvas-wrapper {
    background-color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 1px rgba(0,0,0,0.02), 0 30px 60px -15px rgba(0,0,0,0.1), var(--shadow-glow);
    border-radius: 8px;
    transition: transform 0.3s ease;
}

/* Badges & Accents */
.badge-new {
    background: linear-gradient(135deg, var(--primary) 0%, #60a5fa 100%);
    color: white;
    font-size: 10px;
    padding: 3px 10px;
    border-radius: 9999px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

/* Primary Export Button Override */
#exportBtn {
    background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    border: none;
}
#exportBtn:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
    transform: translateY(-1px);
}

/* Toggle Switches */
.peer-checked\:bg-blue-600:checked ~ .peer {
    background-color: var(--primary) !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(148, 163, 184, 0.05);
}
::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.4);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.6);
    background-clip: content-box;
}
/* Floating Rotate Button (Right side of the room frame) */
#rotateBtnContainer {
    position: absolute;
    left: 100%;
    bottom: 80px; /* 余白50pxより上に配置 */
    margin-left: 20px;
    z-index: 100;
}

@media (max-width: 1024px) {
    #rotateBtnContainer {
        position: fixed;
        bottom: 5.5rem;
        right: 1.5rem;
        left: auto;
        margin-left: 0;
    }
}