/* ============================================================
   C2M2 Assessment Platform - Stylesheet
   Industrial OT/ICS aesthetic: dark navy + amber/orange accent
   ============================================================ */

:root {
    /* Palette */
    --navy-950: #0a1423;
    --navy-900: #0f1f35;
    --navy-800: #162a47;
    --navy-700: #1f3659;
    --navy-600: #2b4770;
    --navy-500: #3a5a88;
    --navy-400: #5a7aa8;
    --navy-300: #8ba6ce;

    --amber-500: #f59e0b;
    --amber-400: #fbbf24;
    --amber-600: #d97706;

    --slate-50:  #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    /* Status colors - aligned with C2M2 report conventions */
    --fi: #16a34a;   /* green - Fully Implemented */
    --li: #84cc16;   /* lime - Largely */
    --pi: #eab308;   /* yellow - Partially */
    --ni: #dc2626;   /* red - Not Implemented */
    --na: #64748b;   /* gray - N/A */

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 56px;
    --radius: 6px;

    /* Fonts */
    --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

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

body {
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    color: var(--slate-800);
    background: var(--slate-100);
    min-height: 100vh;
}

a { color: var(--navy-700); text-decoration: none; }
a:hover { color: var(--amber-600); }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; color: var(--navy-900); letter-spacing: -0.01em; }
h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }
h4 { font-size: 16px; }

code, .mono { font-family: var(--font-mono); font-size: 12px; }

/* ---------- Layout shell ---------- */
.shell { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--navy-900);
    color: var(--slate-200);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: 18px 22px;
    border-bottom: 1px solid var(--navy-700);
    display: flex; align-items: center; gap: 12px;
}
.sidebar-brand .logo-box {
    width: 36px; height: 36px;
    background: var(--amber-500);
    border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display);
    font-weight: 700; font-size: 18px;
    color: var(--navy-950);
}
.sidebar-brand .brand-text {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 18px;
    letter-spacing: 0.02em;
    color: #fff;
}
.sidebar-brand .brand-sub {
    display: block; font-size: 10px; color: var(--navy-300);
    text-transform: uppercase; letter-spacing: 0.12em;
    font-family: var(--font-body); font-weight: 500;
}

.sidebar nav { flex: 1; padding: 16px 0; overflow-y: auto; }
.sidebar .nav-section {
    padding: 0 22px; margin: 18px 0 6px;
    font-size: 10px; font-weight: 600;
    color: var(--navy-400); text-transform: uppercase; letter-spacing: 0.15em;
}
.sidebar .nav-link {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 22px;
    color: var(--slate-300);
    font-size: 13px; font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.15s ease;
}
.sidebar .nav-link:hover { background: var(--navy-800); color: #fff; }
.sidebar .nav-link.active {
    background: var(--navy-800);
    color: var(--amber-400);
    border-left-color: var(--amber-500);
}
.sidebar .nav-icon { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.8; }

.sidebar-footer {
    padding: 14px 22px;
    border-top: 1px solid var(--navy-700);
    font-size: 11px; color: var(--navy-300);
}
.sidebar-footer .user-name { color: #fff; font-weight: 500; font-size: 12px; display: block; }
.sidebar-footer .user-role {
    display: inline-block; margin-top: 4px;
    padding: 2px 7px; border-radius: 3px;
    background: var(--amber-500); color: var(--navy-950);
    font-size: 9px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
}

.main {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex; flex-direction: column;
}

.topbar {
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid var(--slate-200);
    padding: 0 28px;
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 50;
}
.topbar .crumbs { color: var(--slate-500); font-size: 13px; }
.topbar .crumbs .sep { margin: 0 8px; color: var(--slate-300); }
.topbar .crumbs .current { color: var(--navy-900); font-weight: 600; }

.content { padding: 28px; flex: 1; max-width: 1400px; width: 100%; }

.page-header {
    display: flex; justify-content: space-between; align-items: flex-end;
    margin-bottom: 24px; padding-bottom: 16px;
    border-bottom: 2px solid var(--slate-200);
}
.page-header h1 { margin-bottom: 4px; }
.page-header .subtitle { color: var(--slate-500); font-size: 13px; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 16px;
    border: 1px solid transparent; border-radius: var(--radius);
    font-family: var(--font-body); font-size: 13px; font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
}
.btn-primary { background: var(--navy-900); color: #fff; }
.btn-primary:hover { background: var(--navy-800); color: #fff; }
.btn-accent { background: var(--amber-500); color: var(--navy-950); }
.btn-accent:hover { background: var(--amber-600); color: #fff; }
.btn-outline { background: transparent; border-color: var(--slate-300); color: var(--slate-700); }
.btn-outline:hover { background: var(--slate-100); border-color: var(--navy-700); }
.btn-danger { background: #dc2626; color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ---------- Cards & tables ---------- */
.card {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.card-header {
    padding: 14px 18px;
    border-bottom: 1px solid var(--slate-200);
    display: flex; justify-content: space-between; align-items: center;
}
.card-header h3 { font-size: 15px; font-family: var(--font-body); font-weight: 600; }
.card-body { padding: 18px; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.stat {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius);
    padding: 18px;
    position: relative; overflow: hidden;
}
.stat::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--amber-500);
}
.stat .stat-label {
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--slate-500); font-weight: 600; margin-bottom: 8px;
}
.stat .stat-value {
    font-family: var(--font-display); font-size: 32px; font-weight: 600;
    color: var(--navy-900); line-height: 1;
}
.stat .stat-hint { margin-top: 6px; font-size: 12px; color: var(--slate-500); }

table.data {
    width: 100%; border-collapse: collapse; background: #fff;
    border: 1px solid var(--slate-200); border-radius: var(--radius); overflow: hidden;
}
table.data th {
    background: var(--slate-100);
    padding: 10px 12px; text-align: left;
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--slate-600); font-weight: 600;
    border-bottom: 1px solid var(--slate-200);
}
table.data td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--slate-100);
    font-size: 13px;
}
table.data tr:hover { background: var(--slate-50); }
table.data tr:last-child td { border-bottom: none; }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block; font-size: 12px; font-weight: 600;
    color: var(--slate-700); margin-bottom: 5px;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.form-control {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--slate-300);
    border-radius: var(--radius);
    font-family: inherit; font-size: 13px;
    background: #fff;
}
.form-control:focus {
    outline: none;
    border-color: var(--navy-700);
    box-shadow: 0 0 0 3px rgba(31, 54, 89, 0.1);
}
textarea.form-control { min-height: 80px; resize: vertical; }

/* ---------- Badges (implementation status) ---------- */
.badge {
    display: inline-block;
    padding: 2px 8px; border-radius: 3px;
    font-size: 11px; font-weight: 600;
    letter-spacing: 0.04em;
}
.badge-fi { background: var(--fi); color: #fff; }
.badge-li { background: var(--li); color: #1a2e05; }
.badge-pi { background: var(--pi); color: #422006; }
.badge-ni { background: var(--ni); color: #fff; }
.badge-na { background: var(--na); color: #fff; }
.badge-none { background: var(--slate-200); color: var(--slate-700); }

.mil-badge {
    display: inline-block;
    width: 28px; height: 24px;
    line-height: 24px; text-align: center;
    background: var(--navy-800); color: #fff;
    font-family: var(--font-display); font-weight: 600; font-size: 12px;
    border-radius: 3px;
}
.mil-1 { background: #64748b; }
.mil-2 { background: #2563eb; }
.mil-3 { background: var(--navy-900); }

/* ---------- Assessment survey ---------- */
.survey-layout { display: grid; grid-template-columns: 280px 1fr; gap: 24px; }
@media (max-width: 900px) { .survey-layout { grid-template-columns: 1fr; } }

.domain-nav {
    background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
    padding: 10px; position: sticky; top: calc(var(--topbar-height) + 24px);
    max-height: calc(100vh - var(--topbar-height) - 48px); overflow-y: auto;
}
.domain-nav .dn-item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 12px; margin-bottom: 3px;
    border-radius: 4px; cursor: pointer;
    font-size: 13px; font-weight: 500;
    color: var(--slate-700);
    border-left: 3px solid transparent;
}
.domain-nav .dn-item:hover { background: var(--slate-50); }
.domain-nav .dn-item.active {
    background: var(--navy-900); color: #fff;
    border-left-color: var(--amber-500);
}
.domain-nav .dn-code {
    font-family: var(--font-mono); font-size: 10px;
    opacity: 0.7; display: block; margin-bottom: 2px;
}
.domain-nav .dn-progress {
    font-size: 10px; padding: 2px 6px; border-radius: 3px;
    background: var(--slate-100); color: var(--slate-600);
}
.domain-nav .dn-item.active .dn-progress { background: var(--navy-700); color: var(--amber-400); }

.objective-block {
    background: #fff; border: 1px solid var(--slate-200); border-radius: var(--radius);
    margin-bottom: 16px;
}
.objective-block.management { border-left: 4px solid var(--amber-500); }
.objective-block .ob-header {
    padding: 14px 18px; background: var(--navy-900); color: #fff;
    border-radius: var(--radius) var(--radius) 0 0;
    display: flex; justify-content: space-between; align-items: center;
}
.objective-block .ob-header h3 { color: #fff; font-family: var(--font-body); font-size: 14px; font-weight: 600; }
.objective-block .ob-num {
    display: inline-block; min-width: 24px; padding: 2px 6px;
    background: var(--amber-500); color: var(--navy-950);
    font-family: var(--font-mono); font-weight: 700; font-size: 11px;
    border-radius: 3px; margin-right: 10px;
}
.objective-block .ob-mgmt-tag {
    background: var(--amber-500); color: var(--navy-950);
    font-size: 10px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.08em; padding: 3px 8px; border-radius: 3px;
}

.practice-row {
    padding: 14px 18px;
    border-bottom: 1px solid var(--slate-100);
    display: grid; grid-template-columns: 80px 1fr 220px; gap: 16px;
    align-items: start;
}
.practice-row:last-child { border-bottom: none; }
.practice-row .p-ref {
    font-family: var(--font-mono); font-size: 11px; font-weight: 600;
    color: var(--navy-700); padding-top: 4px;
}
.practice-row .p-mil { font-size: 10px; color: var(--slate-500); margin-top: 2px; }
.practice-row .p-statement { color: var(--slate-800); font-size: 13px; line-height: 1.5; }
.practice-row .p-notes {
    margin-top: 8px;
    font-size: 12px; color: var(--slate-500);
    width: 100%; padding: 6px 8px;
    border: 1px solid var(--slate-200); border-radius: 4px;
    font-family: inherit;
    display: none;
}
.practice-row.has-notes .p-notes { display: block; }

.impl-group { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.impl-btn {
    padding: 6px 4px;
    border: 1px solid var(--slate-300);
    background: #fff;
    font-size: 11px; font-weight: 600;
    color: var(--slate-600);
    cursor: pointer; text-align: center;
    border-radius: 3px;
    transition: all 0.12s ease;
}
.impl-btn:hover { border-color: var(--navy-700); }
.impl-btn.active {
    color: #fff;
    border-color: transparent;
}
.impl-btn[data-impl="FI"].active { background: var(--fi); }
.impl-btn[data-impl="LI"].active { background: var(--li); color: #1a2e05; }
.impl-btn[data-impl="PI"].active { background: var(--pi); color: #422006; }
.impl-btn[data-impl="NI"].active { background: var(--ni); }
.impl-btn[data-impl="NA"].active { background: var(--na); }

.notes-toggle {
    margin-top: 6px;
    font-size: 11px; color: var(--navy-500);
    background: none; border: none; cursor: pointer;
    padding: 0;
}
.notes-toggle:hover { color: var(--amber-600); }

/* ---------- Flash messages ---------- */
.flash-container { margin-bottom: 18px; }
.flash {
    padding: 10px 14px; border-radius: var(--radius);
    margin-bottom: 8px; font-size: 13px;
    display: flex; align-items: center; gap: 10px;
}
.flash-success { background: #dcfce7; color: #14532d; border-left: 3px solid #16a34a; }
.flash-error   { background: #fee2e2; color: #7f1d1d; border-left: 3px solid #dc2626; }
.flash-info    { background: #dbeafe; color: #1e3a8a; border-left: 3px solid #2563eb; }

/* ---------- Login screen ---------- */
.login-shell {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--navy-950) 0%, var(--navy-800) 100%);
    padding: 20px;
}
.login-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    width: 100%; max-width: 400px;
    overflow: hidden;
}
.login-header {
    background: var(--navy-900);
    padding: 28px 32px 24px;
    color: #fff; text-align: center;
    border-bottom: 3px solid var(--amber-500);
}
.login-header .logo-box {
    display: inline-flex; align-items: center; justify-content: center;
    width: 48px; height: 48px;
    background: var(--amber-500); color: var(--navy-950);
    font-family: var(--font-display); font-weight: 700; font-size: 24px;
    border-radius: 6px; margin-bottom: 12px;
}
.login-header h1 { color: #fff; font-size: 22px; margin-bottom: 4px; }
.login-header .sub {
    font-size: 11px; text-transform: uppercase; letter-spacing: 0.15em;
    color: var(--navy-300);
}
.login-body { padding: 28px 32px; }
.login-body .btn { width: 100%; justify-content: center; padding: 10px; }

/* ---------- Utils ---------- */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.mb-2 { margin-bottom: 8px; } .mb-3 { margin-bottom: 12px; } .mb-4 { margin-bottom: 16px; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; }
.text-sm { font-size: 12px; }
.text-muted { color: var(--slate-500); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.hidden { display: none; }

/* Progress bar */
.progress {
    width: 100%; height: 6px;
    background: var(--slate-200); border-radius: 3px; overflow: hidden;
}
.progress-bar {
    height: 100%; background: var(--amber-500);
    transition: width 0.3s ease;
}