:root {
            --bg: #f0eeeb;
            --bg-warm: #eae7e2;
            --surface: #ffffff;
            --text: #1a1a1a;
            --text-secondary: #6b6b6b;
            --text-tertiary: #999999;
            --line: #d4d0ca;
            --shadow-soft: 0 8px 40px rgba(0,0,0,0.08);
            --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-display: 'Cormorant Garamond', 'Noto Sans SC', serif;
        }

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; overscroll-behavior: none; }
        body { overscroll-behavior: none; }

body {
            font-family: var(--font-body);
            background: var(--bg); color: var(--text);
            line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden;
        }

body.drawer-open .container {
            grid-template-columns: 364px 1fr;
        }

body.drawer-open .drawer {
            width: 300px;
            opacity: 1;
            border-right: 1px solid var(--line);
        }

body.drawer-open .drawer-overlay {
            opacity: 1; pointer-events: auto;
        }

/* Drawer Trigger */
        .drawer-trigger {
            display: flex; flex-direction: column;
            align-items: center; gap: 10px;
            cursor: pointer; margin-bottom: auto;
            padding: 20px 0;
            transition: all 0.4s ease;
            max-height: 200px; opacity: 1; overflow: hidden;
        }

body.drawer-open .drawer-trigger {
            max-height: 0; opacity: 0; margin: 0; padding: 0;
            pointer-events: none;
        }

/* Drawer Nav */
        .drawer-nav {
            width: 100%;
        }

/* Drawer Logo */
        .drawer-logo {
            font-family: var(--font-display);
            font-size: 24px; font-weight: 600;
            letter-spacing: 3px; text-transform: uppercase;
            margin-bottom: 40px; color: var(--text);
            padding: 0 36px 0 50px;
            opacity: 0;
            transform: translateX(-10px);
            transition: all 0.4s ease 0.15s;
        }

body.drawer-open .drawer-logo {
            opacity: 1;
            transform: translateX(0);
        }

/* Drawer open: hide mail icon, rotate scroll-top arrow */
        body.drawer-open .sidebar-icon.mail-icon { display: none; }

body.drawer-open .sidebar-icon.scroll-top i { transform: rotate(-90deg); }


/* ===== Expand Panel ===== */
        .expand-panel {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 0.55s cubic-bezier(0.22, 1, 0.36, 1);
            background: var(--surface);
        }
        .expand-panel.open {
            grid-template-rows: 1fr;
        }
        .expand-panel > .expand-wrapper {
            overflow: hidden;
        }
        .expand-layout {
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 64px;
            align-items: stretch;
        }
        .expand-left {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            align-items: flex-start;
            padding: 2px 0;
        }
        .expand-left-top {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 16px;
        }
        .expand-icon {
            width: 48px; height: 48px; border-radius: 10px;
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; flex-shrink: 0;
        }
        .expand-title {
            font-family: var(--font-display);
            font-size: 24px; font-weight: 600; line-height: 1.15;
        }
        .expand-right {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 2px 0;
        }
        .expand-desc {
            font-size: 14px; color: var(--text-secondary);
            line-height: 1.7;
        }
        .btn {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 28px; font-size: 11px; font-weight: 600;
            letter-spacing: 1.5px; text-transform: uppercase;
            font-family: inherit; cursor: pointer;
            transition: all 0.3s; border: none; text-decoration: none;
        }
        .btn-primary { background: var(--text); color: var(--bg); }
        .btn-primary:hover { background: var(--text-secondary); }
        .btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
        .btn-ghost:hover { border-color: var(--text); }