/* MekDojo Expert UI — Light Professional Design System */
/* Navy/white palette inspired by industrial technical documentation */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* ── Core Palette (Light Professional) ── */
    --bg-base: #ffffff;
    --bg-surface: #f8f9fb;
    --bg-elevated: #f1f3f7;
    --bg-input: #ffffff;
    --bg-hover: rgba(30, 58, 95, 0.05);
    --bg-active: rgba(30, 58, 95, 0.10);

    /* ── Text ── */
    --text: #1a1a2e;
    --text-muted: #4a5568;
    --text-light: #718096;
    --text-placeholder: #a0aec0;
    --text-heading: #1e3a5f;

    /* ── Accent / Brand (Navy) ── */
    --primary: #1e3a5f;
    --primary-light: #2c5282;
    --primary-bg: rgba(30, 58, 95, 0.08);
    --primary-border: rgba(30, 58, 95, 0.20);

    /* ── Borders ── */
    --border: #e2e8f0;
    --border-light: #edf2f7;
    --border-faint: rgba(0, 0, 0, 0.06);

    /* ── Status Colors (vibrant on white) ── */
    --danger: #c53030;
    --danger-bg: #fff5f5;
    --danger-text: #c53030;
    --success: #2f855a;
    --success-bg: #f0fff4;
    --success-text: #2f855a;
    --warning: #c05621;
    --warning-bg: #fffaf0;
    --warning-text: #c05621;

    /* ── Shadows (visible on white) ── */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-card: 0 2px 8px rgba(30, 58, 95, 0.12);
    --shadow-modal: 0 20px 40px rgba(0, 0, 0, 0.15);

    /* ── Layout ── */
    --radius: 6px;
    --radius-lg: 10px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --white: #ffffff;
}

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

body {
    font-family: var(--font);
    background-color: var(--bg-base);
    color: var(--text);
    font-size: 13px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { color: var(--primary); text-decoration: none; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e0; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #a0aec0; }

/* ===== Navbar (stays navy blue) ===== */
.navbar {
    background: #1e3a5f;
    color: #ffffff;
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #16304f;
    z-index: 10;
    position: relative;
}

.navbar-brand { display: flex; flex-direction: column; }
.brand-title { font-size: 18px; font-weight: 700; line-height: 1.2; color: #ffffff; }
.brand-subtitle { font-size: 11px; font-weight: 400; color: rgba(255,255,255,0.65); margin-top: 2px; }
.navbar-center {
    font-size: 14px; font-weight: 600; letter-spacing: 0.5px; color: rgba(255,255,255,0.85);
    position: absolute; left: 50%; transform: translateX(-50%);
}

.nav-links { display: flex; align-items: center; position: relative; }
.nav-links a.nav-link {
    color: rgba(255,255,255,0.7); text-decoration: none;
    margin-left: 20px; font-size: 13px; font-weight: 500;
    transition: color 0.2s;
}
.nav-links a.nav-link:hover { color: #ffffff; }
.nav-links a.nav-link.active {
    color: #ffffff;
    border-bottom: 2px solid #ffffff;
    padding-bottom: 2px;
}

/* Profile dropdown */
.profile-menu { position: relative; margin-left: 20px; }
.profile-icon {
    width: 34px; height: 34px; border-radius: 50%;
    background: rgba(255,255,255,0.15);
    display: flex; justify-content: center; align-items: center;
    cursor: pointer; font-weight: bold; color: #ffffff;
    border: 1px solid rgba(255,255,255,0.25);
    transition: background 0.2s; font-size: 13px;
}
.profile-icon:hover { background: rgba(255,255,255,0.25); border-color: rgba(255,255,255,0.4); }

.dropdown {
    position: absolute; top: calc(100% + 10px); right: 0;
    background: var(--bg-surface); border: 1px solid var(--border);
    border-radius: var(--radius); min-width: 150px;
    display: none; overflow: hidden; z-index: 1000;
    box-shadow: var(--shadow-modal);
}
.dropdown.active { display: block; }
.dropdown a {
    display: block; padding: 10px 14px; color: var(--text);
    text-decoration: none; font-size: 13px; transition: background 0.2s;
}
.dropdown a:hover { background: var(--bg-hover); }

/* ===== Layout ===== */
.layout { display: flex; flex: 1; overflow: hidden; }

.sidebar {
    width: 280px; background: var(--bg-surface);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
}
.sidebar-header {
    padding: 16px 20px; border-bottom: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
}
.sidebar-header h2 { font-size: 14px; font-weight: 600; color: var(--text-muted); }

.main-content {
    flex: 1; display: flex; flex-direction: column;
    background: var(--bg-base); overflow-y: auto;
}
.content-header {
    padding: 24px 32px; background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}
.content-header h2 { font-size: 22px; color: var(--text-heading); margin-bottom: 6px; }
.content-header p { color: var(--text-muted); font-size: 13px; }
.content-body { padding: 32px; max-width: 1000px; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-light); }

/* ===== Buttons ===== */
.btn-primary, .btn-submit, .btn-action, .btn {
    background: var(--primary);
    color: white; border: none;
    padding: 8px 18px; border-radius: var(--radius);
    font-size: 13px; font-weight: 600;
    cursor: pointer; text-align: center;
    text-decoration: none; display: inline-block;
    transition: all 0.15s; font-family: var(--font);
}
.btn-primary:hover, .btn-submit:hover, .btn-action:hover, .btn:hover {
    background: #2563eb; box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

.btn-small {
    background: var(--bg-elevated); color: var(--text);
    border: 1px solid var(--border); padding: 5px 10px; border-radius: 4px;
    font-size: 11px; font-weight: 500; cursor: pointer;
    transition: all 0.15s;
}
.btn-small:hover { background: var(--primary-bg); border-color: var(--primary-border); color: var(--primary-light); }

.btn-cancel, .btn-secondary {
    background: var(--bg-elevated); color: var(--text);
    border: 1px solid var(--border); padding: 8px 18px;
    border-radius: var(--radius); cursor: pointer; font-weight: 500;
}
.btn-cancel:hover, .btn-secondary:hover { background: var(--bg-hover); }

.btn-danger {
    background: var(--danger); color: white;
    border: none; padding: 8px 18px;
    border-radius: var(--radius); cursor: pointer; font-weight: 500;
}
.btn-danger:hover { background: #dc2626; }

.btn-outline {
    background: transparent; color: var(--primary-light);
    border: 1px solid var(--primary-border);
    padding: 8px 18px; border-radius: var(--radius);
    cursor: pointer; font-weight: 500; transition: all 0.15s;
}
.btn-outline:hover { background: var(--primary-bg); }

.btn-icon {
    background: transparent; border: none; cursor: pointer;
    font-size: 16px; padding: 4px; color: var(--text-muted);
    transition: color 0.2s;
}
.btn-icon:hover { color: var(--primary-light); }

.btn-icon-danger {
    background: transparent; border: none; cursor: pointer;
    font-size: 14px; padding: 4px; color: var(--text-light);
    transition: color 0.2s;
}
.btn-icon-danger:hover { color: var(--danger); }

/* ===== Cards ===== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px; margin-top: 16px;
}

.card {
    background: var(--bg-surface); border-radius: var(--radius-lg);
    padding: 20px; border: 1px solid var(--border);
    transition: border-color 0.2s, transform 0.2s;
}
.card:hover { border-color: var(--primary-border); transform: translateY(-2px); }
.card h3 { font-size: 16px; color: var(--text-heading); margin-bottom: 12px; }
.card-actions { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }

/* ===== Modals ===== */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none; justify-content: center; align-items: center;
    z-index: 100; backdrop-filter: blur(4px);
}
.modal-overlay.active { display: flex; }

.modal {
    background: var(--bg-surface); width: 100%; max-width: 500px;
    border-radius: var(--radius-lg); padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-modal);
}
.modal h3 { margin-bottom: 20px; color: var(--primary-light); }
.modal-actions {
    display: flex; justify-content: flex-end;
    gap: 10px; margin-top: 24px;
}

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; margin-bottom: 6px;
    font-weight: 500; font-size: 13px; color: var(--text-muted);
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%; padding: 10px 12px;
    border: 1px solid var(--border); border-radius: var(--radius);
    font-size: 13px; font-family: var(--font);
    background: var(--bg-input); color: var(--text);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-placeholder); }

/* ===== Badges ===== */
.badge {
    display: inline-block; padding: 2px 8px;
    background: var(--primary-bg); color: var(--primary-light);
    border-radius: 10px; font-size: 11px; font-weight: 600; margin-left: 8px;
}
.badge.extracted { background: var(--success-bg); color: var(--success-text); }
.badge.pending { background: var(--bg-elevated); color: var(--text-muted); }

/* ===== Progress Steps ===== */
.progress-step {
    padding: 10px 14px; border-radius: var(--radius); font-size: 13px;
    display: flex; align-items: center; gap: 10px;
    background: var(--bg-surface); color: var(--text-muted);
    border: 1px solid var(--border);
}
.progress-step .step-icon { font-size: 18px; min-width: 24px; text-align: center; }
.progress-step.done { color: var(--success-text); background: var(--success-bg); border-color: rgba(34, 197, 94, 0.3); }
.progress-step.active { color: var(--primary-light); background: var(--primary-bg); border-color: var(--primary-border); }
.progress-step.error { color: var(--danger-text); background: var(--danger-bg); border-color: rgba(239, 68, 68, 0.3); }

/* ===== Machine list (sidebar) ===== */
.machine-list { flex: 1; overflow-y: auto; padding: 8px; }
.machine-item { margin-bottom: 4px; }
.machine-header {
    padding: 10px 12px; border-radius: var(--radius); cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    transition: all 0.15s; border: 1px solid transparent;
    color: var(--text);
}
.machine-header:hover { background: var(--bg-hover); }
.machine-header.active {
    background: var(--primary-bg); border-color: var(--primary-border);
    font-weight: 600; color: var(--primary-light);
}

.subsystem-list { padding-left: 16px; padding-top: 4px; display: none; }
.machine-item.expanded .subsystem-list { display: block; }
.subsystem-item {
    padding: 6px 10px; margin-bottom: 2px; border-radius: 4px;
    font-size: 12px; color: var(--text-muted); cursor: pointer;
    transition: all 0.15s; border-left: 2px solid transparent;
}
.subsystem-item:hover { background: var(--bg-hover); color: var(--text); }
.subsystem-item.active {
    background: var(--primary-bg); color: var(--primary-light);
    border-left-color: var(--primary); font-weight: 500;
}

/* ===== Discovery / Upload items ===== */
.discovery-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border: 1px solid var(--border);
    border-radius: var(--radius); margin-bottom: 6px;
    transition: background 0.15s;
}
.discovery-item:hover { background: var(--bg-hover); }
.discovery-item input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; accent-color: var(--primary); }
.discovery-item .machine-name { flex: 1; font-weight: 500; font-size: 13px; }
.file-selected { border-color: rgba(34, 197, 94, 0.4) !important; background: var(--success-bg) !important; }

.dataset-list-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px; border: 1px solid var(--border);
    border-radius: var(--radius); margin-bottom: 8px;
    background: var(--bg-surface);
}
.dataset-list-actions { display: flex; gap: 8px; }

/* ===== Centered page layout ===== */
.page-centered {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.page-card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-modal);
    padding: 36px;
    max-width: 480px;
    width: 100%;
}
.page-card h1 {
    color: var(--primary-light);
    margin-bottom: 10px;
    font-size: 22px;
}
.page-card .subtitle { color: var(--text-muted); margin-bottom: 20px; font-size: 13px; }
.page-card .nav-top { margin-bottom: 16px; }
.page-card .nav-top a { color: var(--primary-light); text-decoration: none; font-size: 13px; }
.page-card .nav-top a:hover { color: #93c5fd; }

/* ===== Alerts ===== */
.alert-error {
    background: var(--danger-bg); color: var(--danger-text);
    padding: 10px 14px; border-radius: var(--radius);
    margin-bottom: 16px; font-size: 13px;
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.alert-success {
    background: var(--success-bg); color: var(--success-text);
    padding: 10px 14px; border-radius: var(--radius);
    margin-bottom: 16px; font-size: 13px;
    border: 1px solid rgba(34, 197, 94, 0.3);
}
.alert-warning {
    background: var(--warning-bg); color: var(--warning-text);
    padding: 10px 14px; border-radius: var(--radius);
    margin-bottom: 16px; font-size: 13px;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ===== Tables ===== */
table { width: 100%; border-collapse: collapse; margin-bottom: 16px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); }
th { background: var(--bg-elevated); font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
tr:hover { background: var(--bg-hover); }

/* ===== Info box ===== */
.info-box {
    background: var(--primary-bg); border-radius: var(--radius);
    padding: 14px; margin-top: 12px; border: 1px solid var(--primary-border);
}
.info-box strong { color: var(--primary-light); }

/* ===== Node Detail Panel ===== */
.node-detail-panel {
    position: absolute; top: 0; right: 0; width: 300px; height: 100%;
    background: var(--bg-surface); border-left: 1px solid var(--border);
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.3);
    display: flex; flex-direction: column; z-index: 30;
    transition: transform 0.2s ease;
}
.node-detail-panel.hidden { transform: translateX(100%); pointer-events: none; }
.node-detail-header {
    padding: 14px 16px; border-bottom: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
}
.node-detail-header h3 {
    font-size: 14px; font-weight: 600; color: var(--text-heading);
    margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1;
}
.node-detail-close {
    background: none; border: none; font-size: 20px; cursor: pointer;
    color: var(--text-muted); padding: 0 0 0 8px; line-height: 1;
}
.node-detail-close:hover { color: var(--danger); }
.node-detail-body { flex: 1; overflow-y: auto; padding: 16px; }
.node-type-badge {
    display: inline-block; padding: 3px 10px; border-radius: 12px;
    font-size: 11px; font-weight: 600; margin-bottom: 12px;
    background: var(--primary-bg); color: var(--primary-light);
}
.node-type-badge.flagged { background: var(--danger-bg); color: var(--danger-text); }
.node-props-table { width: 100%; font-size: 12px; }
.node-props-table td { padding: 4px 0; vertical-align: top; border: none; }
.node-props-table td:first-child { color: var(--text-muted); width: 90px; font-weight: 500; }
.node-props-table td:last-child { color: var(--text); word-break: break-word; }
.node-source-page {
    margin-top: 10px; padding: 8px 10px; background: var(--bg-elevated);
    border-radius: var(--radius); font-size: 12px; color: var(--text-muted);
}
.node-detail-actions { padding: 12px 16px; border-top: 1px solid var(--border); }
.node-detail-actions textarea {
    width: 100%; padding: 8px; border: 1px solid var(--border);
    border-radius: var(--radius); font-size: 12px; font-family: var(--font);
    resize: vertical; margin-bottom: 8px;
    background: var(--bg-input); color: var(--text);
}
.node-detail-actions textarea:focus { outline: none; border-color: var(--primary); }
.btn-flag {
    width: 100%; padding: 8px 16px; border-radius: var(--radius);
    font-size: 13px; font-weight: 600; cursor: pointer; border: none;
    transition: all 0.15s;
}
.btn-flag:hover { opacity: 0.9; }
.btn-flag.flag { background: var(--danger); color: white; }
.btn-flag.unflag { background: var(--success); color: white; }
.node-flag-reason {
    margin-top: 8px; padding: 8px 10px; background: var(--danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.3); border-radius: var(--radius);
    font-size: 12px; color: var(--danger-text);
}

/* ===== Flagged Filter Button ===== */
.flagged-filter-btn {
    padding: 5px 10px; border-radius: 5px; border: 1px solid var(--danger);
    background: transparent; cursor: pointer; font-size: 11px;
    color: var(--danger-text); transition: all 0.2s; display: inline-flex;
    align-items: center; gap: 4px;
}
.flagged-filter-btn:hover { background: var(--danger-bg); }
.flagged-filter-btn.active { background: var(--danger); color: white; }
.flagged-count-badge {
    display: inline-block; min-width: 14px; height: 14px; line-height: 14px;
    text-align: center; border-radius: 7px; font-size: 10px; font-weight: 700;
    background: var(--danger); color: white; padding: 0 3px;
}
.flagged-filter-btn.active .flagged-count-badge { background: white; color: var(--danger); }

/* Flagged node list items */
.flagged-node-item {
    padding: 10px 12px; margin: 4px 0; border-radius: var(--radius);
    border: 1px solid rgba(239, 68, 68, 0.3); background: var(--danger-bg); display: flex;
    align-items: flex-start; gap: 10px; font-size: 12px;
}
.flagged-node-info { flex: 1; }
.flagged-node-name { font-weight: 600; color: var(--text); }
.flagged-node-meta { font-size: 11px; color: var(--text-muted); margin-top: 2px; }
.flagged-node-reason { font-size: 11px; color: var(--danger-text); margin-top: 4px; font-style: italic; }
.btn-unflag {
    padding: 4px 10px; border-radius: 4px; border: 1px solid var(--success);
    background: transparent; color: var(--success-text); font-size: 11px;
    font-weight: 600; cursor: pointer; white-space: nowrap; transition: all 0.2s;
}
.btn-unflag:hover { background: var(--success); color: white; }

/* ===== Citation Badges & Sources Bar ===== */
.cite-badge {
    display: inline-block; padding: 1px 6px; margin: 0 1px;
    background: var(--success-bg); color: var(--success-text);
    border: 1px solid rgba(34, 197, 94, 0.3); border-radius: 4px;
    font-size: 10px; font-weight: 600; vertical-align: baseline;
    cursor: pointer;
}
.cite-badge::before { content: '✅ '; font-size: 9px; }
.sources-bar {
    align-self: flex-start; max-width: 85%; margin-top: -4px;
    font-size: 12px;
}
.sources-toggle {
    display: inline-flex; align-items: center; gap: 4px;
    cursor: pointer; color: var(--primary-light); font-weight: 500;
    padding: 4px 0; user-select: none;
}
.sources-toggle::before { content: '\25B6'; font-size: 8px; transition: transform 0.2s; }
.sources-bar.expanded .sources-toggle::before { transform: rotate(90deg); }
.sources-list {
    display: none; flex-wrap: wrap; gap: 4px;
    padding: 6px 0 2px;
}
.sources-bar.expanded .sources-list { display: flex; }
.source-badge {
    display: inline-block; padding: 2px 8px; background: var(--success-bg);
    color: var(--success-text); border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 4px; font-size: 11px; font-weight: 500;
    cursor: pointer;
}
.source-badge::before { content: '🏷️ '; }

/* ===== Utility ===== */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }