:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #22d3ee;
    --success: #10b981;
    --input-bg: rgba(15, 23, 42, 0.5);
}

[data-theme="light"] {
    --bg-dark: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(0, 0, 0, 0.08);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --input-bg: rgba(255, 255, 255, 1);
    --summary-bg: #ffffff;
    --result-bg: linear-gradient(135deg, #eef2ff, #f8faff);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(80px);
    opacity: 0.15;
    border-radius: 50%;
}

.blob-1 { width: 500px; height: 500px; background: var(--primary); top: -100px; right: -100px; }
.blob-2 { width: 400px; height: 400px; background: var(--accent); bottom: -50px; left: -100px; }
.blob-3 { width: 300px; height: 300px; background: #ec4899; top: 40%; left: 30%; }

.container-fluid {
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 1.5rem;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header.compact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo i { font-size: 1.8rem; color: var(--primary); }
.logo h1 { font-size: 1.4rem; font-family: 'Outfit', sans-serif; font-weight: 700; }
.logo h1 span { color: var(--text-muted); font-weight: 400; }

.header-actions {
    display: flex;
    gap: 0.75rem;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.2fr 1.2fr 1fr;
    gap: 1.5rem;
    flex: 1;
    min-height: 0;
}

/* Card */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.card-header {
    padding: 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-header i { color: var(--primary); font-size: 1.1rem; }
.card-header h2 { font-size: 1.1rem; font-weight: 600; }

.card-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

/* Inputs & Groups */
.input-group { margin-bottom: 1.25rem; }
.input-group:last-child { margin-bottom: 0; }
.input-group label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0.5rem; }

input[type="range"] {
    width: 100%;
    margin-top: 10px;
    cursor: pointer;
}

select, input[type="date"], input[type="number"], input[type="text"] {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 0.6rem 0.8rem;
    color: var(--text-main);
    font-size: 0.9rem;
    transition: all 0.2s;
}

[data-theme="light"] input[type="date"]::-webkit-calendar-picker-indicator {
    filter: none;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

select:focus, input:focus {
    border-color: var(--primary);
    outline: none;
    background: rgba(15, 23, 42, 0.8);
}

[data-theme="light"] select:focus, [data-theme="light"] input:focus {
    background: #ffffff;
}

.date-range-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 0.5rem;
}

.sep { color: var(--text-muted); }

/* Mode Toggle */
.mode-toggle.mini {
    display: flex;
    background: rgba(var(--primary-rgb, 99, 102, 241), 0.1);
    border: 1px solid var(--card-border);
    padding: 0.3rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.btn-mode {
    flex: 1;
    border: none;
    background: none;
    color: var(--text-muted);
    padding: 0.5rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-mode.active {
    background: var(--primary);
    color: white;
}

/* Weekdays */
.weekday-picker.compact {
    display: flex;
    gap: 4px;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: 10px;
}

.day-check { flex: 1; cursor: pointer; text-align: center; }
.day-check input { display: none; }
.day-check span {
    display: block;
    padding: 8px 0;
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-muted);
    transition: all 0.2s;
}
.day-check input:checked + span { background: var(--primary); color: white; }

.holiday-toggle.mini {
    margin-bottom: 2rem;
    padding: 0.5rem 0;
}

/* HVAC Panels */
.hvac-box {
    margin-bottom: 0.75rem;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
}

.hvac-details-panel {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--card-border);
}

.panel-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.panel-row.full {
    grid-template-columns: 1fr;
    margin-top: 0.5rem;
}

.adj-grid {
    display: grid;
    grid-template-columns: 1fr 70px;
    gap: 0.5rem;
}

.panel-row.full input {
    font-size: 0.75rem;
    padding: 0.4rem;
}

/* Custom Checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-size: 0.9rem;
    user-select: none;
}

.checkbox-container input { display: none; }
.checkmark {
    width: 18px;
    height: 18px;
    border: 1px solid var(--card-border);
    border-radius: 4px;
    background: rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkbox-container input:checked ~ .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkmark::after {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: white;
    font-size: 9px;
    display: none;
}
.checkbox-container input:checked ~ .checkmark::after { display: block; }

/* Results Card */
.result-card { background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(30, 41, 59, 0.7)); }
[data-theme="light"] .result-card { background: var(--result-bg); }

.summary-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-item {
    background: rgba(15, 23, 42, 0.4);
    padding: 1rem;
    border-radius: 15px;
    text-align: center;
}
[data-theme="light"] .summary-item { background: var(--summary-bg); border: 1px solid var(--card-border); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05); }

.summary-item .label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 0.4rem; display: block; }
.summary-item .value { font-size: 1.1rem; font-weight: 700; color: var(--primary); }

.detailed-list { margin-bottom: 1.5rem; }
.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 0.9rem;
}

.detail-math {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
    margin-top: -0.4rem;
    margin-bottom: 0.6rem;
    opacity: 0.8;
}

.detail-row.subtotal { font-weight: 600; color: var(--text-main); margin-top: 0.5rem; }
.detail-row.discount { color: var(--success); font-size: 0.85rem; }

.divider { height: 1px; background: var(--card-border); margin: 0.75rem 0; }

.final-display {
    text-align: center;
    background: rgba(99, 102, 241, 0.2);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}
[data-theme="light"] .final-display { background: #eef2ff; border-color: rgba(99, 102, 241, 0.2); }

.final-display p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.price-tag { display: flex; align-items: baseline; justify-content: center; gap: 0.3rem; }
.price-tag .won { font-size: 1.2rem; color: var(--primary); font-weight: 600; }
.price-tag #res-total { font-size: 2.2rem; font-weight: 800; font-family: 'Outfit', sans-serif; }

/* Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-icon:hover { background: var(--primary); transform: translateY(-2px); }

.btn-primary {
    width: 100%;
    padding: 0.8rem;
    background: var(--primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    cursor: pointer;
}

/* Modals */
.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active { display: flex; }
.modal-content { width: 90%; max-width: 500px; }
.modal-header { padding: 1.25rem; border-bottom: 1px solid var(--card-border); display: flex; justify-content: space-between; }
.close-modal { background: none; border: none; color: var(--text-muted); font-size: 1.5rem; cursor: pointer; }

/* Responsive */
@media (max-width: 1200px) {
    .dashboard-grid { grid-template-columns: 1fr 1fr; }
    .result-card { grid-column: span 2; }
    .container-fluid { height: auto; }
}

@media (max-width: 768px) {
    .dashboard-grid { grid-template-columns: 1fr; }
    .result-card { grid-column: span 1; }
}

.hidden { display: none !important; }

/* Animation */
#res-total { transition: all 0.5s ease-out; }

/* Print Styles */
@media print {
    @page {
        margin: 15mm;
        size: portrait;
    }

    html, body {
        width: 210mm;
        height: 297mm;
        background: white !important;
        color: black !important;
        font-size: 14px; /* Increase size for readability */
    }

    .background-blobs, .header-actions, .settings-modal, .btn-primary, #theme-toggle {
        display: none !important;
    }

    /* Hide Column 1 and 2 entirely */
    .card:nth-child(1), .card:nth-child(2) {
        display: none !important;
    }

    .container-fluid {
        display: block !important;
        padding: 0;
        margin: 0;
        width: 100%;
    }

    .app-header.compact {
        text-align: center;
        margin-bottom: 30px;
        border-bottom: 2px solid #333;
        padding-bottom: 10px;
    }

    .logo { justify-content: center; }
    .logo i { display: none; }
    .logo h1 { font-size: 1.8rem !important; color: black !important; }

    .dashboard-grid {
        display: block !important;
        width: 100%;
    }

    /* Page 2: Results (Portrait Full Page) */
    .card:nth-child(3) {
        display: block !important;
        width: 100% !important;
        height: auto !important;
        border: none !important;
        box-shadow: none !important;
        background: white !important;
        padding: 0 !important;
    }

    .card-header {
        background: transparent !important;
        border-bottom: 1px solid #000 !important;
        margin-bottom: 30px;
        padding: 0 0 10px 0 !important;
    }

    .card-header h2 { font-size: 1.4rem !important; text-align: left; }
    .card-header i { display: none; }

    .card-body {
        overflow: visible !important;
        padding: 0 !important;
    }

    .summary-box {
        grid-template-columns: 1fr 1fr !important;
        gap: 20px !important;
        margin-bottom: 40px !important;
    }

    .summary-item {
        background: #f0f4ff !important;
        border: 1px solid #ccc !important;
        padding: 20px !important;
        border-radius: 10px !important;
    }

    .summary-item .label { font-size: 0.9rem !important; margin-bottom: 8px !important; }
    .summary-item .value { font-size: 1.4rem !important; }

    .detailed-list { 
        margin-bottom: 50px !important; 
        border: 1px solid #eee;
        padding: 20px;
        border-radius: 10px;
    }
    .detail-row {
        padding: 12px 0 !important;
        border-bottom: 1px solid #eee !important;
        font-size: 1.2rem !important;
    }
    .detail-row:last-child { border-bottom: none; }

    .final-display {
        margin-top: 50px !important;
        padding: 40px !important;
        background: #fff !important;
        border: 3px double #333 !important;
        border-radius: 0 !important;
    }

    .final-display p { font-size: 1.4rem !important; font-weight: bold; }
    .price-tag #res-total { font-size: 4rem !important; color: #000 !important; }
    .price-tag .won { font-size: 1.5rem !important; color: #000 !important; }

    /* Footer for Print */
    .card-body::after {
        content: "위와 같이 시설 사용료가 산정되었습니다.\A (발행일: " attr(data-date) ")";
        display: block;
        text-align: center;
        margin-top: 100px;
        font-size: 1.2rem;
        white-space: pre-wrap;
    }
}