/* =============================================================================
   otr.nsgia.com — switchboard.css
   SINGLE SOURCE OF TRUTH. No inline styles allowed anywhere in this site.
   Palette extracted from nsgia.com portal.css.

   TABLE OF CONTENTS
   ---------------------------------------------------------------------------
   REGION 1: FOUNDATIONS   — tokens, typography, color
   REGION 2: LAYOUT        — grid, navbar, sidebar, footer, hero
   REGION 3: COMPONENTS    — cards, accordions, buttons, forms
   REGION 4: PAGE-SPECIFIC — corridor map, site card, partner blocks
   REGION 5: RESPONSIVE    — breakpoints, mobile overrides
   ============================================================================= */


/* =============================================================================
   REGION 1: FOUNDATIONS
   ============================================================================= */

:root {
    /* NSG palette — matches nsgia.com */
    --color-navbar: #1a1a1a;
    --color-sidebar: #2c3e50;
    --color-sidebar-hover: #34495e;
    --color-sidebar-active: #3498db;
    --color-footer: #1a1a1a;
    --color-primary: #2c5282;
    --color-primary-light: #3182ce;
    --color-accent: #52ab98;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-bg: #f5f7fa;
    --color-border: #e2e8f0;
    --color-card-bg: #ffffff;

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;

    /* Layout */
    --navbar-height: 60px;
    --sidebar-width: 220px;
    --footer-height: 50px;
    --content-max: 1100px;

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 6px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-top: 0;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-3) 0; }

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


/* =============================================================================
   REGION 2: LAYOUT
   ============================================================================= */

/* --- Navbar --- */
.otr-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--color-navbar);
    color: var(--color-white);
    display: flex;
    align-items: center;
    padding: 0 var(--space-4);
    z-index: 1000;
    box-shadow: var(--shadow-md);
}
.otr-navbar__brand {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-white);
    margin-right: var(--space-5);
}
.otr-navbar__brand-tag {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    margin-left: var(--space-2);
}
.otr-navbar__links {
    display: flex;
    gap: var(--space-4);
    margin-left: auto;
}
.otr-navbar__links a {
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
}
.otr-navbar__links a:hover { color: var(--color-white); }

/* --- Sidebar --- */
.otr-sidebar {
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    bottom: var(--footer-height);
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    color: var(--color-white);
    overflow-y: auto;
    padding: var(--space-3) 0;
}
.otr-sidebar__section {
    padding: var(--space-2) var(--space-3);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.5);
    margin-top: var(--space-3);
}
.otr-sidebar__link {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
}
.otr-sidebar__link:hover {
    background: var(--color-sidebar-hover);
    text-decoration: none;
}
.otr-sidebar__link--active {
    background: var(--color-sidebar-active);
    color: var(--color-white);
}
.otr-sidebar__quickstart {
    background: #d4af37;
    color: var(--color-navbar);
    font-weight: 600;
    margin: var(--space-2) var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: 4px;
    text-align: center;
}

/* --- Main content area --- */
.otr-main {
    margin-left: var(--sidebar-width);
    margin-top: var(--navbar-height);
    margin-bottom: var(--footer-height);
    padding: var(--space-5);
    min-height: calc(100vh - var(--navbar-height) - var(--footer-height));
}
.otr-main__inner {
    max-width: var(--content-max);
    margin: 0 auto;
}

/* --- Footer --- */
.otr-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--footer-height);
    background: var(--color-footer);
    color: rgba(255,255,255,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

/* --- Hero (afh-hero pattern, NSG standard) --- */
.otr-hero {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    padding: var(--space-6);
    margin-bottom: var(--space-5);
    background-color: var(--color-primary);
    background-image: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4));
    background-size: cover;
    background-position: center;
    color: var(--color-white);
}
.otr-hero h1 {
    color: var(--color-white);
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 400;
    font-style: italic;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.8);
    margin-bottom: var(--space-3);
    text-align: center;
}
.otr-hero p {
    color: var(--color-white);
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 300;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    max-width: 700px;
    text-align: center;
    line-height: 1.7;
}


/* =============================================================================
   REGION 3: COMPONENTS
   ============================================================================= */

/* --- Card --- */
.otr-card {
    background: var(--color-card-bg);
    border-radius: 8px;
    padding: var(--space-4);
    margin-bottom: var(--space-3);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}
.otr-card__title {
    font-family: var(--font-heading);
    color: var(--color-primary);
    margin-top: 0;
    margin-bottom: var(--space-2);
    font-size: 1.25rem;
}
.otr-card__meta {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-2);
}

/* --- Button --- */
.otr-btn {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 4px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
}
.otr-btn:hover {
    background: var(--color-primary-light);
    text-decoration: none;
    color: var(--color-white);
}
.otr-btn--ghost {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}
.otr-btn--ghost:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* --- Page intro --- */
.otr-page-intro {
    margin-bottom: var(--space-5);
}
.otr-page-intro__eyebrow {
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}
.otr-page-intro__lede {
    font-size: 1.15rem;
    color: var(--color-text-light);
    max-width: 700px;
}


/* =============================================================================
   REGION 4: PAGE-SPECIFIC
   ============================================================================= */

/* --- Story sections (home page) --- */
.otr-story {
    margin-bottom: var(--space-7);
    padding-top: var(--space-3);
    scroll-margin-top: calc(var(--navbar-height) + var(--space-3));
}
.otr-story__eyebrow {
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-2);
}
.otr-story h2 {
    margin-bottom: var(--space-3);
    font-size: 1.85rem;
    line-height: 1.25;
}
.otr-story p {
    font-size: 1.05rem;
    color: var(--color-text);
    max-width: 760px;
    line-height: 1.7;
}

/* --- Card grid (platform stack on /#advantage) --- */
.otr-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
}
.otr-card-grid .otr-card {
    margin-bottom: 0;
}
.otr-card-grid .otr-card p {
    font-size: 0.95rem;
    margin: 0;
}

/* --- Styled list (used in /#plan) --- */
.otr-list {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--space-3) 0;
    max-width: 760px;
}
.otr-list li {
    position: relative;
    padding: var(--space-2) 0 var(--space-2) var(--space-4);
    border-bottom: 1px solid var(--color-border);
    line-height: 1.6;
}
.otr-list li:last-child { border-bottom: none; }
.otr-list li::before {
    content: "›";
    position: absolute;
    left: 0;
    top: var(--space-2);
    color: var(--color-accent);
    font-weight: 700;
    font-size: 1.2rem;
}

/* --- Ask CTA actions --- */
.otr-ask-actions {
    margin-top: var(--space-4);
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

/* --- Tables (used on /proforma) --- */
.otr-table {
    width: 100%;
    max-width: 900px;
    border-collapse: collapse;
    margin: var(--space-3) 0 var(--space-4) 0;
    background: var(--color-card-bg);
    box-shadow: var(--shadow-sm);
    border-radius: 6px;
    overflow: hidden;
    font-size: 0.95rem;
}
.otr-table thead {
    background: var(--color-primary);
    color: var(--color-white);
}
.otr-table th {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    font-weight: 600;
    font-family: var(--font-body);
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}
.otr-table td {
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}
.otr-table tbody tr:last-child td { border-bottom: none; }
.otr-table tbody tr:nth-child(even) { background: rgba(82, 171, 152, 0.04); }
.otr-table tbody tr:hover { background: rgba(82, 171, 152, 0.08); }
.otr-table strong { color: var(--color-primary); }

/* --- placeholders for later bites --- */
.otr-corridor-map { }
.otr-site-card { }
.otr-partner-block { }


/* =============================================================================
   REGION 5: RESPONSIVE
   ============================================================================= */

@media (max-width: 768px) {
    .otr-sidebar { display: none; }
    .otr-main { margin-left: 0; padding: var(--space-3); }
    .otr-hero h1 { font-size: 2rem; }
    .otr-hero p { font-size: 1rem; }
    .otr-navbar__links { gap: var(--space-2); font-size: 0.85rem; }
    .otr-table { font-size: 0.85rem; display: block; overflow-x: auto; }
    .otr-table th, .otr-table td { padding: var(--space-2); }
}

/* =============================================================================
   END
   ============================================================================= */