/* bmi.css — extracted verbatim from bmi.html's original inline <style>; logic/behavior unchanged, only relocated */
/* ==========================================================================
           1. DESIGN SYSTEM & VARIABLES (Synced with Suite Ecosystem)
           ========================================================================== */
        :root {
            --font-main: 'Plus Jakarta Sans', sans-serif;
            --transition-speed: 0.4s;
            --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            
            --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
            --calc-bg: #ffffff;
            --calc-border: rgba(15, 23, 42, 0.06);
            --calc-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.04);
            --text-main: #0f172a;
            --text-secondary: #64748b;
            
            --input-bg: rgba(241, 245, 249, 0.8);
            --accent-color: #4f46e5; /* BMI Indigo Theme Accent */
            --accent-hover: #4338ca;
            --panel-bg: #ffffff;
            --scrollbar-thumb: rgba(15, 23, 42, 0.15);
            
            --success: #10b981;
            --warning: #f59e0b;
            --danger: #ef4444;
        }

        body.dark-mode {
            --bg-gradient: linear-gradient(135deg, #020617 0%, #0f172a 100%);
            --calc-bg: rgba(15, 23, 42, 0.6);
            --calc-border: rgba(255, 255, 255, 0.06);
            --calc-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            --text-main: #f8fafc;
            --text-secondary: #94a3b8;
            
            --input-bg: rgba(30, 41, 59, 0.5);
            --accent-color: #818cf8;
            --accent-hover: #6366f1;
            --panel-bg: rgba(15, 23, 42, 0.95);
            --scrollbar-thumb: rgba(255, 255, 255, 0.1);
        }

        /* ==========================================================================
           2. GLOBAL STYLES & RESET
           ========================================================================== */
        * { box-sizing: border-box; margin: 0; padding: 0; user-select: none; -webkit-user-select: none; }
        body {
            font-family: var(--font-main); background: var(--bg-gradient); min-height: 100vh;
            display: flex; justify-content: center; align-items: center; padding: 40px 20px;
            color: var(--text-main); transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
            overflow-x: hidden; position: relative;
        }
        body::before {
            content: ''; position: absolute; width: 400px; height: 400px; border-radius: 50%;
            filter: blur(150px); opacity: 0.12; z-index: -1; top: -10%; left: -10%; background: #4f46e5;
        }

        /* ==========================================================================
           3. CONTAINER & SPLIT SYSTEM WORKSPACE
           ========================================================================== */
        .calc-container {
            position: relative; width: 100%; max-width: 900px; 
            height: calc(100vh - 40px);
            background: var(--calc-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--calc-border); border-radius: 28px; box-shadow: var(--calc-shadow);
            display: flex; flex-direction: column; overflow: hidden; transition: var(--transition-smooth);
        }
        .calc-header {
            display: flex; justify-content: space-between; align-items: center;
            padding: 20px 24px 14px 24px; z-index: 10; flex-shrink: 0; border-bottom: 1px solid var(--calc-border);
        }
        .calc-title { font-family: 'Space Grotesk', sans-serif; font-size: 1.25rem; font-weight: 700; letter-spacing: -0.5px; }
        .header-controls { display: flex; gap: 10px; align-items: center; }
        
        .icon-btn {
            background: var(--input-bg); border: 1px solid var(--calc-border);
            width: 38px; height: 38px; border-radius: 12px; cursor: pointer;
            display: flex; justify-content: center; align-items: center;
            color: var(--text-main); transition: var(--transition-smooth);
        }
        .icon-btn:hover { transform: scale(1.05); border-color: var(--accent-color); }
        .icon-btn:active { transform: scale(0.95); }
        .icon-btn svg { width: 18px; height: 18px; fill: currentColor; }

        .theme-btn .sun-icon, body.dark-mode .theme-btn .moon-icon { display: none; }
        body.dark-mode .theme-btn .sun-icon { display: block; }

        /* Workspace Core Split Layout */
        .dashboard-workspace { display: grid; grid-template-columns: 1.1fr 0.9fr; flex-grow: 1; overflow: hidden; }
        .workspace-pane { padding: 24px; overflow-y: auto; display: flex; flex-direction: column; gap: 18px; }
        .workspace-pane::-webkit-scrollbar { width: 5px; }
        .workspace-pane::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 10px; }
        .left-pane { border-right: 1px solid var(--calc-border); }

        .gender-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
        .gender-grid input[type="radio"] { display: none; }
        .gender-label { border: 1px solid var(--calc-border); padding: 12px; border-radius: 12px; text-align: center; font-weight: 600; cursor: pointer; background: var(--input-bg); display: block; transition: var(--transition-smooth); font-size: 0.92rem; }
        .gender-grid input[type="radio"]:checked + .gender-label { border-color: var(--accent-color); background: rgba(99, 102, 241, 0.1); color: var(--accent-color); }

        .input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
        .form-group-item { display: flex; flex-direction: column; gap: 6px; position: relative; }
        label { font-size: 0.8rem; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.3px; }
        
        input[type="number"], select { width: 100%; background: var(--input-bg); border: 1px solid var(--calc-border); padding: 12px 45px 12px 14px; border-radius: 12px; font-family: var(--font-main); font-size: 0.95rem; font-weight: 600; color: var(--text-main); outline: none; transition: var(--transition-smooth); }
        input:focus { border-color: var(--accent-color); background: var(--calc-bg); }
        .input-unit { position: absolute; right: 14px; bottom: 13px; font-size: 0.78rem; font-weight: 700; color: var(--text-secondary); }

        .height-toggle-container { display: flex; justify-content: space-between; align-items: center; }
        .toggle-link { font-size: 0.78rem; color: var(--accent-color); cursor: pointer; font-weight: 700; text-decoration: underline; }

        .action-grid { display: flex; gap: 10px; margin-top: 10px; }
        .btn-calc { flex: 2; background: var(--accent-color); color: #fff; border: none; padding: 14px; border-radius: 12px; font-size: 0.95rem; font-weight: 700; cursor: pointer; transition: var(--transition-smooth); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15); }
        .btn-calc:hover { background: var(--accent-hover); transform: translateY(-1px); }
        .btn-reset { flex: 1; background: var(--input-bg); color: var(--text-main); border: 1px solid var(--calc-border); border-radius: 12px; font-size: 0.95rem; font-weight: 700; cursor: pointer; transition: var(--transition-smooth); }
        .btn-reset:hover { background: rgba(0,0,0,0.02); }

        /* Speedometer Gauges Components */
        .meter-container { position: relative; width: 180px; height: 90px; margin: 10px auto; overflow: hidden; }
        .semi-circle { position: absolute; top: 0; left: 0; width: 180px; height: 180px; border-radius: 50%; border: 16px solid #cbd5e1; border-bottom-color: transparent !important; border-left-color: transparent !important; transform: rotate(-45deg); box-sizing: border-box; }
        body.dark-mode .semi-circle { border-color: #334155; }
        .needle { position: absolute; bottom: 0; left: 50%; width: 4px; height: 72px; background: #1e293b; transform-origin: bottom center; transform: translateX(-50%) rotate(-90deg); transition: transform 1s cubic-bezier(0.175, 0.885, 0.32, 1.275); border-radius: 4px; }
        body.dark-mode .needle { background: #f8fafc; }
        .needle-center { position: absolute; bottom: -6px; left: calc(50% - 8px); width: 16px; height: 16px; background: var(--accent-color); border-radius: 50%; border: 3px solid #fff; }

        .output-score { text-align: center; }
        .output-score h2 { font-family: 'Space Grotesk', sans-serif; font-size: 2.2rem; font-weight: 800; }
        .output-score p { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; margin-top: 4px; }

        .state-underweight { color: var(--warning) !important; background: rgba(245,158,11,0.12); }
        .state-normal { color: var(--success) !important; background: rgba(16,185,129,0.12); }
        .state-overweight { color: var(--warning) !important; background: rgba(245,158,11,0.12); }
        .state-obese { color: var(--danger) !important; background: rgba(239,68,68,0.12); }

        .spectrum-bar { display: flex; height: 8px; border-radius: 4px; overflow: hidden; margin: 4px 0; }
        .spec-chunk { flex: 1; }
        .scale-legend { display: flex; justify-content: space-between; font-size: 10px; font-weight: 700; color: var(--text-secondary); }

        .data-sheet { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
        .data-sheet td { padding: 10px 0; border-bottom: 1px solid var(--calc-border); }
        .data-sheet tr:last-child td { border-bottom: none; }
        .data-val { text-align: right; font-weight: 700; }

        .util-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 6px; }
        .btn-util { padding: 10px; font-size: 0.8rem; font-weight: 700; background: var(--input-bg); border: 1px solid var(--calc-border); color: var(--text-main); border-radius: 10px; cursor: pointer; transition: var(--transition-smooth); }
        .btn-util:hover { border-color: var(--accent-color); }

        /* Slideout History Panel Architecture */
        .history-panel {
            position: absolute; top: 0; right: -100%; width: 100%; max-width: 380px; height: 100%;
            background: var(--panel-bg); backdrop-filter: blur(25px); -webkit-backdrop-filter: blur(25px);
            z-index: 100; transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1); display: flex; flex-direction: column;
            border-left: 1px solid var(--calc-border);
        }
        .history-panel.open { right: 0; }
        .history-header { display: flex; justify-content: space-between; align-items: center; padding: 24px; border-bottom: 1px solid var(--calc-border); }
        .history-title { font-family: 'Space Grotesk', sans-serif; font-size: 1.2rem; font-weight: 700; }
        .history-list { flex-grow: 1; overflow-y: auto; padding: 20px 24px; display: flex; flex-direction: column; gap: 12px; }
        .history-list::-webkit-scrollbar { width: 4px; }
        .history-list::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }
        
        .history-item { text-align: left; padding: 12px 14px; border-radius: 14px; background: var(--input-bg); border: 1px solid var(--calc-border); cursor: pointer; transition: var(--transition-smooth); display: flex; justify-content: space-between; align-items: center; }
        .history-item:hover { border-color: var(--accent-color); transform: translateY(-1px); }
        .hist-type { font-size: 0.75rem; font-weight: 700; color: var(--accent-color); text-transform: uppercase; }
        .hist-expr { font-size: 0.85rem; color: var(--text-secondary); margin: 2px 0; }
        .hist-res { font-family: 'Space Grotesk', sans-serif; font-size: 1.05rem; font-weight: 700; }
        .history-footer { padding: 20px 24px; border-top: 1px solid var(--calc-border); display: flex; justify-content: flex-end; }
        .clear-hist-btn { background: transparent; border: none; color: var(--accent-color); font-size: 0.9rem; font-weight: 700; cursor: pointer; }

        /* Toast Component */
        .toast {
            position: fixed; bottom: 35px; left: 50%; transform: translate(-50%, 40px);
            background: #0f172a; color: #ffffff; padding: 12px 24px; border-radius: 50px;
            font-size: 0.85rem; font-weight: 600; opacity: 0; pointer-events: none;
            transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease; z-index: 9999;
        }
        body.dark-mode .toast { background: #f8fafc; color: #0f172a; }
        .toast.show { transform: translate(-50%, 0); opacity: 1; }

        @media (max-width: 850px) {
            .dashboard-workspace { grid-template-columns: 1fr; }
            .left-pane { border-right: none; border-bottom: 1px dashed var(--calc-border); }
            .calc-container { height: 100vh; max-height: 100vh; border-radius: 0; border: none; }
            body { padding: 0; }
        }