:root {
    --bg: #1f2933;
    --panel: #111827;
    --ink: #e5e7eb;
    --muted: #d1d5db;
    --accent: #10b981;
    --sidebar-width: 350px;
    --max-width: 1400px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--bg);
    color: var(--ink);
}

/* HEADER */
header {
    background-color: var(--panel);
    padding: 20px 0;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    text-align: center;
}

header.site-header {
    text-align: left;
}

.site-header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* New header structure: top (logo + main page) above bottom (left/right sections) */
.site-header-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
}

.site-header-bottom {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 22px;
}

.site-header-left,
.site-header-right {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.site-header-left { flex: 1; }
.site-header-right { flex: 1; }

/* Center section titles above their link groups (per spec) */
.site-header-left,
.site-header-right {
    align-items: center;
    text-align: center;
}

.header-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.1;
}

.logo-link { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.logo { height: 54px; width: auto; display: block; }

.site-home-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
}

.site-home-link:hover {
    text-decoration: underline;
}

@media (max-width: 880px) {
    .site-header-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

.primary-nav,
.service-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    justify-content: center;
}

.primary-nav a,
.service-nav a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    padding-bottom: 2px;
}

.primary-nav a:hover,
.service-nav a:hover {
    text-decoration: underline;
}

.primary-nav a.active,
.service-nav a.active {
    color: #ffffff;
    font-weight: 700;
    border-bottom: 2px solid var(--accent);
}

/* HOME PAGES (overall landing, engineering portfolio home, fabrication home) */
.home-hero {
    min-height: 70vh;
    background-image: url("../images/banner3.png");
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 20px;
}

.home-hero-content {
    background: rgba(0, 0, 0, 0.6);
    padding: 60px 80px;
    border-radius: 16px;
    text-align: center;
    max-width: 900px;
}

.home-hero-content h2 {
    font-size: 2.6rem;
    margin: 0 0 15px 0;
}

.home-hero-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

.home-actions {
    margin-top: 26px;
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.home-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border-radius: 12px;
    background: var(--accent);
    color: var(--panel);
    text-decoration: none;
    font-weight: 700;
}

.home-button:hover {
    text-decoration: underline;
}

.home-intro {
    background-color: var(--panel);
    padding: 80px 20px;
}

.home-intro-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.home-intro-content h2 {
    color: var(--accent);
    margin: 0 0 20px 0;
}

.home-intro-content p {
    font-size: 1.05rem;
    line-height: 1.7;
    opacity: 0.9;
}

.home-summary {
    max-width: 1100px;
    margin: 80px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.home-card {
    background-color: var(--panel);
    padding: 30px;
    border-radius: 14px;
}

.home-card h3 {
    margin-top: 0;
    color: var(--accent);
}

.home-card a {
    color: #ffffff;
    text-decoration: none;
}

@media (max-width: 640px) {
    .home-hero-content {
        padding: 34px 22px;
    }
}

/* Legacy header classes (kept for older markup) */
.header-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.header-container img.logo {
    height: 50px;
    width: auto;
}

header h1 {
    margin: 0;
    font-size: 2rem;
    color: #ffffff;
}

nav { text-align: center; }

nav a {
    margin: 0 15px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

nav a:hover { text-decoration: underline; }

nav a.active {
    color: #ffffff;
    font-weight: bold;
    border-bottom: 2px solid var(--accent);
}

.fab-link {
    color: var(--ink);
    text-decoration: none;
    font-weight: 600;
}

.fab-link:hover {
    color: #ffffff;
    text-decoration: underline;
}

.fab-row {
    margin-top: 10px;
    text-align: center;
}

/* BASE LINKS */
a { color: var(--accent); }
a:hover { text-decoration: underline; }

/* TABLES */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--panel);
    border: 1px solid rgba(229, 231, 235, 0.16);
    border-radius: 12px;
    overflow: hidden;
}

.data-table caption {
    caption-side: top;
    text-align: left;
    padding: 12px 14px;
    font-weight: 700;
    color: var(--accent);
}

.data-table th,
.data-table td {
    padding: 12px 14px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid rgba(229, 231, 235, 0.12);
}

.data-table thead th {
    color: #ffffff;
    background: rgba(0, 0, 0, 0.18);
    font-weight: 700;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table .muted {
    color: #9ca3af;
}

.data-table ul {
    margin: 0;
    padding-left: 18px;
}

.data-table li {
    margin: 2px 0;
}

/* SIDEBAR LAYOUT (used on all pages except Home/Connect) */
.container {
    display: flex;
    max-width: var(--max-width);
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

.side-panel {
    width: var(--sidebar-width);
    background-color: var(--panel);
    padding: 30px 20px;
    border-right: 2px solid var(--accent);
    overflow-y: auto;
    position: fixed;
    left: 0;
    top: var(--header-height, 80px);
    bottom: 0;
    height: calc(100vh - var(--header-height, 80px));
}

.side-panel h3 {
    color: var(--accent);
    margin: 0 0 20px 0;
    font-size: 1.2rem;
}

.side-panel ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.side-panel li { margin-bottom: 15px; }

.side-panel a {
    color: var(--ink);
    text-decoration: none;
    padding: 10px 15px;
    display: block;
    border-radius: 8px;
    transition: all 0.3s;
}

.side-panel a:hover,
.side-panel a.active {
    background-color: var(--accent);
    color: var(--panel);
    font-weight: bold;
}

.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    margin-left: var(--sidebar-width);
}

/* FOOTER */
footer {
    background-color: var(--panel);
    text-align: center;
    padding: 30px 20px;
    color: #9ca3af;
    font-size: 0.9em;
}

body.has-sidebar footer {
    margin-left: var(--sidebar-width);
    max-width: calc(100% - var(--sidebar-width));
}

body.no-sidebar footer {
    margin-left: 0;
    max-width: 100%;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .site-header-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .site-header-left,
    .site-header-right {
        align-items: center;
        text-align: center;
    }

    .site-header-right { align-items: center; }

    .primary-nav,
    .service-nav {
        justify-content: center;
    }

    .container { flex-direction: column; }
    .side-panel {
        position: static;
        width: 100%;
        border-right: none;
        border-bottom: 2px solid var(--accent);
        max-height: none;
        height: auto;
    }
    .side-panel ul { display: flex; flex-wrap: wrap; gap: 10px; }
    .side-panel li { margin-bottom: 0; }
    .main-content { padding: 20px; margin-left: 0; }
    body.has-sidebar footer { margin-left: 0; max-width: 100%; }
}