:root {
    --primary: #2D5A27;
    --primary-light: #4A8B3F;
    --primary-soft: #E8F5E9;
    --accent: #FFB300;
    --accent-light: #FFCF33;
    --danger: #D32F2F;
    --bg-main: #F9FBF9;
    --bg-white: #FFFFFF;
    --bg-input: #FFFFFF;
    --text-dark: #1A2E1A;
    --text-muted: #6B7280;
    --border-color: #E2E8F0;
    --sidebar-width: 260px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --topbar-bg: rgba(255,255,255,0.85);
    --table-stripe: #FAFAFA;
}

/* ===================== DARK MODE ===================== */
[data-theme="dark"] {
    --primary: #5BBF4F;
    --primary-light: #7CD96F;
    --primary-soft: rgba(91,191,79,0.12);
    --accent: #FFD54F;
    --danger: #EF5350;
    --bg-main: #111816;
    --bg-white: #1A2420;
    --bg-input: #223029;
    --text-dark: #E8F0EC;
    --text-muted: #90A49A;
    --border-color: #2D3D35;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.35);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.4);
    --topbar-bg: rgba(26,36,32,0.9);
    --table-stripe: #1F2E28;
}

[data-theme="dark"] .input-group input,
[data-theme="dark"] .input-group select,
[data-theme="dark"] .input-group textarea { background: var(--bg-input); color: var(--text-dark); }
[data-theme="dark"] .search-box input { color: var(--text-dark); }
[data-theme="dark"] .preview-document { background-color: var(--bg-white); }
[data-theme="dark"] .proposal { color: var(--text-dark); }
[data-theme="dark"] .proposal tr:nth-child(even) td { background-color: var(--table-stripe); }
[data-theme="dark"] .project-icon.broiler { background-color: rgba(30,136,229,0.15); }
[data-theme="dark"] .project-icon.layer { background-color: rgba(245,127,23,0.15); }
[data-theme="dark"] .project-icon.dual { background-color: rgba(123,31,162,0.15); }
[data-theme="dark"] .status-ready { background-color: rgba(46,125,50,0.2); }
[data-theme="dark"] .status-draft { background-color: rgba(255,255,255,0.08); color: var(--text-muted); }
[data-theme="dark"] .project-delete:hover { background-color: rgba(239,83,80,0.15); }

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-dark);
    line-height: 1.6;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===================== APP LAYOUT ===================== */
.app-container { display: flex; height: 100vh; width: 100vw; }

/* ===================== SIDEBAR ===================== */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    z-index: 100;
    flex-shrink: 0;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

/* Mobile hamburger button */
.hamburger {
    display: none; width: 38px; height: 38px;
    background: transparent; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); cursor: pointer; color: var(--text-muted);
    align-items: center; justify-content: center; transition: all 0.2s ease;
}
.hamburger:hover { background-color: var(--primary-soft); color: var(--primary); }

/* Mobile overlay */
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); z-index: 99;
    opacity: 0; transition: opacity 0.3s ease;
}
.sidebar-overlay.active { display: block; opacity: 1; }

.logo { display: flex; align-items: center; gap: 12px; margin-bottom: 48px; }
.logo-icon { color: var(--primary); width: 28px; height: 28px; }
.logo-text { font-size: 22px; font-weight: 700; color: var(--text-dark); letter-spacing: -0.5px; }
.logo-text span { color: var(--primary); }

.nav-menu { flex: 1; display: flex; flex-direction: column; gap: 6px; }

.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 16px;
    text-decoration: none; color: var(--text-muted);
    font-weight: 500; font-size: 14px;
    transition: all 0.2s ease;
    border-radius: var(--radius-md);
}
.nav-item i { width: 20px; height: 20px; }
.nav-item:hover { background-color: var(--primary-soft); color: var(--primary); }
.nav-item.active { background-color: var(--primary); color: var(--bg-white); box-shadow: var(--shadow-md); }

.sidebar-footer { margin-top: auto; padding-top: 24px; border-top: 1px solid var(--border-color); }
.user-profile { display: flex; align-items: center; gap: 12px; }
.avatar {
    width: 36px; height: 36px;
    background-color: var(--primary-soft); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; font-weight: 600; font-size: 14px;
}
.user-name { font-size: 14px; font-weight: 600; }
.user-role { font-size: 12px; color: var(--text-muted); }

/* ===================== MAIN CONTENT ===================== */
.main-content { flex: 1; display: flex; flex-direction: column; overflow-y: auto; }

.top-bar {
    height: 72px; padding: 0 32px;
    display: flex; align-items: center; justify-content: space-between;
    background-color: var(--topbar-bg);
    backdrop-filter: blur(10px);
    position: sticky; top: 0; z-index: 5;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.search-box {
    display: flex; align-items: center; gap: 10px;
    background-color: var(--bg-main);
    padding: 9px 16px; border-radius: var(--radius-md);
    width: 360px;
}
.search-box i { color: var(--text-muted); width: 16px; }
.search-box input { background: transparent; border: none; outline: none; width: 100%; font-family: inherit; font-size: 13px; }

.top-actions { display: flex; align-items: center; gap: 12px; }

/* ===================== BUTTONS ===================== */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 20px; border-radius: var(--radius-md);
    font-weight: 600; font-size: 13px; cursor: pointer;
    transition: all 0.2s ease; border: none; font-family: inherit;
}
.btn-primary { background-color: var(--primary); color: white; }
.btn-primary:hover { background-color: var(--primary-light); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover { background-color: var(--primary-soft); border-color: var(--primary); }

.btn-sm { padding: 6px 12px; font-size: 12px; }

.btn-icon {
    width: 38px; height: 38px; display: flex; align-items: center; justify-content: center;
    background: transparent; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); cursor: pointer; color: var(--text-muted);
    transition: all 0.2s ease;
}
.btn-icon:hover { background-color: var(--primary-soft); color: var(--primary); }

/* ===================== VIEW CONTAINER ===================== */
.view-container { padding: 32px; max-width: 1100px; margin: 0 auto; width: 100%; }
.view { display: none; animation: fadeIn 0.3s ease; }
.view.active { display: block; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ===================== WELCOME BANNER ===================== */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg); padding: 36px;
    color: white; display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 28px; box-shadow: var(--shadow-lg);
    position: relative; overflow: hidden;
}
.welcome-banner::after {
    content: ''; position: absolute; right: -30px; bottom: -30px;
    width: 180px; height: 180px; background: rgba(255,255,255,0.05); border-radius: 50%;
}
.welcome-banner h1 { font-size: 28px; font-weight: 700; margin-bottom: 6px; }
.highlight { color: var(--accent); }

.banner-stats { display: flex; gap: 20px; z-index: 1; }
.stat-card {
    background: rgba(255,255,255,0.12); backdrop-filter: blur(5px);
    padding: 14px 22px; border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.1);
}
.stat-label { display: block; font-size: 11px; text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 2px; opacity: 0.8; }
.stat-value { font-size: 22px; font-weight: 700; }
.text-accent { color: var(--accent); }
.text-danger { color: var(--danger) !important; }

/* ===================== CARDS ===================== */
.card {
    background: var(--bg-white); border-radius: var(--radius-lg);
    padding: 28px; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm);
}
.dashboard-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; }
.analytics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.card-header h3 { font-size: 16px; font-weight: 700; }
.header-icon { width: 18px; height: 18px; color: var(--text-muted); }

/* ===================== EMPTY STATE ===================== */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state i { width: 40px; height: 40px; margin-bottom: 12px; opacity: 0.4; }
.empty-state p { margin-bottom: 16px; font-size: 14px; }

/* ===================== PROJECT LIST ===================== */
.projects-list { display: flex; flex-direction: column; gap: 12px; }
.project-item {
    display: flex; align-items: center; gap: 14px;
    padding: 14px; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); transition: all 0.2s ease; cursor: pointer;
}
.project-item:hover { border-color: var(--primary); background-color: var(--primary-soft); }
.project-icon {
    width: 42px; height: 42px; border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.project-icon.broiler { background-color: #E3F2FD; color: #1E88E5; }
.project-icon.layer { background-color: #FFF8E1; color: #F57F17; }
.project-icon.dual { background-color: #F3E5F5; color: #7B1FA2; }
.project-info { flex: 1; min-width: 0; }
.project-info h4 { font-size: 14px; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.project-info p { font-size: 11px; color: var(--text-muted); }
.project-status { padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; flex-shrink: 0; }
.status-ready { background-color: #C8E6C9; color: #2E7D32; }
.status-draft { background-color: #F5F5F5; color: #616161; }
.project-delete {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    padding: 4px; border-radius: 4px; display: flex; align-items: center;
}
.project-delete:hover { color: var(--danger); background-color: #FFEBEE; }

/* ===================== QUICK REFERENCE ===================== */
.quick-ref-list { display: flex; flex-direction: column; gap: 0; }
.ref-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 0; border-bottom: 1px solid var(--border-color); font-size: 13px;
}
.ref-item:last-child { border-bottom: none; }
.ref-value { font-weight: 700; color: var(--primary); font-size: 13px; }
.highlight-row { background-color: var(--primary-soft); margin: 8px -12px 0; padding: 10px 12px; border-radius: var(--radius-sm); border-bottom: none; }

/* ===================== WIZARD ===================== */
.wizard-header { margin-bottom: 36px; display: flex; justify-content: space-between; align-items: center; }
.wizard-header h2 { font-size: 22px; }
.wizard-steps { display: flex; gap: 8px; }
.step {
    display: flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500;
    color: var(--text-muted); padding: 6px 14px; border-radius: 20px; transition: all 0.2s ease;
}
.step span { font-weight: 400; }
.step-num { width: 22px; height: 22px; border-radius: 50%; background: var(--border-color); display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }
.step.active { color: var(--primary); background-color: var(--primary-soft); }
.step.active .step-num { background: var(--primary); color: white; }
.step.completed .step-num { background: var(--primary-light); color: white; }

/* ===================== FORM STYLES ===================== */
.form-step { display: none; }
.form-step.active { display: block; animation: slideIn 0.25s ease; }
@keyframes slideIn { from { opacity: 0; transform: translateX(16px); } to { opacity: 1; transform: translateX(0); } }

.step-title { margin-bottom: 28px; }
.step-title h3 { font-size: 22px; margin-bottom: 4px; }
.step-title p { color: var(--text-muted); font-size: 14px; }

.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.input-group input, .input-group select, .input-group textarea {
    width: 100%; padding: 10px 14px;
    border: 1px solid var(--border-color); border-radius: var(--radius-md);
    font-family: inherit; font-size: 13px; transition: all 0.2s ease;
    background: var(--bg-input); color: var(--text-dark);
}
.input-group input:focus, .input-group select:focus, .input-group textarea:focus {
    border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px var(--primary-soft);
}
.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.section-label { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 16px; }

.checkbox-group { display: flex; flex-direction: column; gap: 10px; }
.checkbox-item { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 13px; }
.checkbox-item input { width: 16px; height: 16px; accent-color: var(--primary); }

.input-with-prefix { position: relative; display: flex; align-items: center; }
.input-with-prefix span { position: absolute; left: 14px; color: var(--text-muted); font-weight: 600; font-size: 12px; }
.input-with-prefix input { padding-left: 40px; }

/* ===================== FINANCIAL SUMMARY ===================== */
.summary-box { background-color: var(--bg-main); padding: 20px; border-radius: var(--radius-md); margin-top: 24px; }
.summary-item { display: flex; justify-content: space-between; padding: 6px 0; font-size: 13px; }
.summary-item.subtotal { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border-color); font-weight: 600; }
.summary-item.total {
    margin-top: 10px; padding-top: 10px; border-top: 2px solid var(--primary);
    font-weight: 700; font-size: 16px; color: var(--primary);
}

/* ===================== WIZARD FOOTER ===================== */
.wizard-footer {
    margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border-color);
    display: flex; justify-content: space-between; align-items: center;
}
.wizard-footer-right { display: flex; gap: 10px; }

/* ===================== PREVIEW ===================== */
.preview-actions { display: flex; gap: 12px; margin-bottom: 20px; }
.preview-document {
    background-color: white; border: 1px solid var(--border-color);
    border-radius: var(--radius-md); min-height: 400px;
    box-shadow: var(--shadow-sm); overflow: auto;
}
.preview-placeholder { text-align: center; color: var(--text-muted); padding: 80px 20px; }
.preview-placeholder i { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.3; }

/* Generated Proposal Styles */
.proposal { padding: 48px; font-size: 14px; line-height: 1.7; }
.proposal h1 { color: var(--primary); font-size: 24px; margin-bottom: 4px; }
.proposal .proposal-subtitle { font-size: 14px; color: var(--text-muted); margin-bottom: 32px; }
.proposal h2 { font-size: 17px; color: var(--primary); border-bottom: 2px solid var(--primary-soft); padding-bottom: 8px; margin: 28px 0 14px; }
.proposal h3 { font-size: 14px; margin: 16px 0 8px; }
.proposal p, .proposal li { font-size: 13px; margin-bottom: 8px; }
.proposal ul { margin-left: 20px; margin-bottom: 16px; }
.proposal table { width: 100%; border-collapse: collapse; margin: 12px 0 20px; font-size: 12px; }
.proposal th { background-color: var(--primary-soft); text-align: left; padding: 8px 12px; font-weight: 600; }
.proposal td { padding: 7px 12px; border-bottom: 1px solid var(--border-color); }
.proposal tr:nth-child(even) td { background-color: #FAFAFA; }
.proposal .fin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 12px 0 20px; }
.proposal .fin-card { background: var(--bg-main); padding: 16px; border-radius: var(--radius-sm); }
.proposal .fin-card .fin-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.proposal .fin-card .fin-value { font-size: 22px; font-weight: 700; }
.proposal .fin-card .fin-value.positive { color: var(--primary); }
.proposal .fin-card .fin-value.negative { color: var(--danger); }
.proposal .footer-note { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--border-color); font-size: 10px; color: var(--text-muted); text-align: center; }

/* ===================== KNOWLEDGE BASE ===================== */
.docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.doc-card {
    background: var(--bg-white); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 28px;
    transition: all 0.2s ease; cursor: pointer;
    position: relative; overflow: hidden;
}
.doc-card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.doc-icon { width: 44px; height: 44px; background: var(--primary-soft); color: var(--primary); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.doc-card h4 { font-size: 15px; margin-bottom: 6px; }
.doc-card p { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.doc-tag {
    display: inline-block; padding: 3px 10px; border-radius: 20px;
    font-size: 10px; font-weight: 600; background: var(--primary-soft); color: var(--primary);
}

.doc-detail { margin-top: 24px; }
.doc-detail h2 { font-size: 22px; margin: 20px 0 12px; }
.doc-detail h3 { font-size: 16px; margin: 20px 0 8px; color: var(--primary); }
.doc-detail p { font-size: 14px; margin-bottom: 10px; line-height: 1.7; }
.doc-detail ul { margin-left: 20px; margin-bottom: 16px; }
.doc-detail li { font-size: 14px; margin-bottom: 6px; }
.doc-detail table { width: 100%; border-collapse: collapse; margin: 12px 0 20px; font-size: 13px; }
.doc-detail th { background-color: var(--primary-soft); text-align: left; padding: 10px 14px; font-weight: 600; }
.doc-detail td { padding: 8px 14px; border-bottom: 1px solid var(--border-color); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1024px) {
    .dashboard-grid, .analytics-grid { grid-template-columns: 1fr; }
    .docs-grid { grid-template-columns: repeat(2, 1fr); }
    .welcome-banner { flex-direction: column; align-items: flex-start; gap: 20px; }
    .input-grid, .input-row { grid-template-columns: 1fr; }
    .wizard-header { flex-direction: column; align-items: flex-start; gap: 16px; }
    .wizard-steps { flex-wrap: wrap; }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed; left: 0; top: 0; height: 100%;
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .hamburger { display: flex; }
    .search-box { width: 160px; }
    .top-bar { padding: 0 16px; }
    .view-container { padding: 20px 16px; }
    .welcome-banner { padding: 24px; }
    .welcome-banner h1 { font-size: 22px; }
    .banner-stats { flex-direction: column; gap: 10px; }
    .stat-card { padding: 10px 16px; }
    .stat-value { font-size: 18px; }
    .card { padding: 20px; }
    .docs-grid { grid-template-columns: 1fr; }
    .doc-card { padding: 20px; }
    .proposal { padding: 24px; }
    .proposal .fin-grid { grid-template-columns: 1fr; }
    .step span { display: none; }
    .step { padding: 6px 10px; }
    .btn span { display: none; }
    .btn i + span { display: none; }
    .wizard-footer { gap: 8px; }
}

/* ===================== PRINT STYLES ===================== */
@media print {
    body { overflow: visible; }
    .sidebar, .top-bar, .wizard-header, .wizard-footer, .preview-actions, .nav-menu { display: none !important; }
    .app-container { display: block; }
    .main-content { overflow: visible; }
    .view-container { padding: 0; max-width: 100%; }
    .preview-document { border: none; box-shadow: none; min-height: auto; }
    .proposal { padding: 20px; }
    .proposal h1 { font-size: 20px; }
    .proposal h2 { font-size: 15px; break-after: avoid; }
    .proposal table { break-inside: avoid; }
}