/* === Public Layout Styles — Tech Theme === */
:root {
    --brand-primary: #4F46E5;
    --brand-light: rgba(79,70,229,0.08);
    --brand-dark: #3730A3;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --bg-white: rgba(255,255,255,0.85);
    --bg-gray: #F1F5F9;
    --border-color: rgba(226,232,240,0.8);
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,0.08), 0 12px 32px rgba(79,70,229,0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-gray);
    background-image: radial-gradient(circle, rgba(79,70,229,0.04) 1px, transparent 1px);
    background-size: 30px 30px;
    line-height: 1.7;
}
.pub-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== Header — Dark Glass ===== */
.pub-header {
    background: rgba(15,23,42,0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(99,102,241,0.15);
    position: sticky; top: 0; z-index: 50;
}
.pub-header .pub-container {
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}
.pub-logo {
    font-size: 20px; font-weight: 700; color: white;
    text-decoration: none; display: flex; align-items: center; gap: 8px;
}
.pub-logo svg { width: 28px; height: 28px; }
.pub-nav { display: flex; align-items: center; gap: 20px; }
.pub-nav a {
    text-decoration: none; color: #94a3b8;
    font-size: 14px; font-weight: 500; transition: color .2s;
}
.pub-nav a:hover { color: #a5b4fc; }
.pub-nav .nav-cta {
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    color: white !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600;
    transition: all .3s;
    box-shadow: 0 4px 20px rgba(79,70,229,0.35);
}
.pub-nav .nav-cta:hover {
    background: linear-gradient(135deg, #4338CA, #6D28D9);
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(79,70,229,0.45), 0 0 24px rgba(99,102,241,0.15);
}

/* ===== Footer — Deep Tech ===== */
.pub-footer {
    background: linear-gradient(135deg, #0a0a1a 0%, #0f172a 50%, #1e1b4b 100%);
    color: #94a3b8;
    border-top: 1px solid rgba(99,102,241,0.1);
    padding: 48px 0 32px;
    position: relative;
    overflow: hidden;
}
.pub-footer::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}
.pub-footer > * { position: relative; z-index: 1; }
.pub-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    text-align: left;
    margin-bottom: 32px;
}
.pub-footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 16px;
}
.pub-footer-col a, .pub-footer-col p {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    font-size: 13px;
    margin-bottom: 8px;
    transition: color .2s;
}
.pub-footer-col a:hover { color: white; }
.pub-footer-brand {
    font-size: 20px;
    font-weight: 700;
    color: #818CF8;
    margin-bottom: 8px;
}
.pub-footer-tagline {
    font-size: 13px;
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: 8px;
}
.pub-footer-bottom {
    border-top: 1px solid rgba(99,102,241,0.15);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #6B7280;
}
.pub-footer-bottom a { color: #94a3b8; text-decoration: none; }
.pub-footer-bottom a:hover { color: white; }

/* ===== Page Banner — Tech Grid + Glow ===== */
.pub-page-banner {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 30%, #4338ca 60%, #4f46e5 100%);
    padding: 48px 0 40px;
    color: #fff;
}
.pub-page-banner::before {
    content: '';
    position: absolute; inset: 0; z-index: 0;
    background-image:
        linear-gradient(rgba(99,102,241,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}
.pub-page-banner-bg {
    position: absolute; inset: 0; z-index: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 50%, rgba(99,102,241,0.3) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 80% 30%, rgba(129,140,248,0.2) 0%, transparent 50%),
        radial-gradient(ellipse 40% 50% at 50% 100%, rgba(165,180,252,0.15) 0%, transparent 40%);
    pointer-events: none;
}
.pub-page-banner::after {
    content: "";
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, #818cf8, #c084fc, #f472b6, #818cf8);
    opacity: 0.7;
}
.pub-page-banner-inner { position: relative; z-index: 1; }
.pub-page-banner .pub-breadcrumb {
    padding: 0 0 12px;
    font-size: 13px;
    color: rgba(199,210,254,0.8);
}
.pub-page-banner .pub-breadcrumb a {
    color: rgba(199,210,254,0.9);
    text-decoration: none;
    transition: color .2s;
}
.pub-page-banner .pub-breadcrumb a:hover {
    color: #fff;
    text-decoration: underline;
}
.pub-page-banner-title {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin: 0;
    line-height: 1.2;
}
.pub-page-banner-subtitle {
    font-size: 15px;
    color: rgba(199,210,254,0.85);
    margin-top: 8px;
    line-height: 1.5;
    max-width: 600px;
}

/* Breadcrumb (standalone, outside banner) */
.pub-breadcrumb {
    padding: 16px 0; font-size: 13px; color: var(--text-muted);
}
.pub-breadcrumb a { color: var(--brand-primary); text-decoration: none; }
.pub-breadcrumb a:hover { text-decoration: underline; }

/* ===== Cards — Glassmorphism ===== */
.pub-card {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(226,232,240,0.8);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform .25s, box-shadow .25s, border-color .25s;
}
.pub-card:hover {
    transform: translateY(-3px);
    border-color: #a5b4fc;
    box-shadow: var(--shadow-lg);
}
.pub-card-body { padding: 20px 24px; }

/* ===== Tags ===== */
.pub-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(79,70,229,0.08);
    color: #4F46E5;
    border: 1px solid rgba(79,70,229,0.12);
    border-radius: 20px;
    font-size: 12px;
    margin: 2px 4px 2px 0;
}

/* ===== Nav Dropdown ===== */
.nav-dropdown { position: relative; }
.nav-dropdown > a {
    display: flex; align-items: center; gap: 4px; cursor: pointer;
}
.nav-dropdown-caret {
    font-size: 10px; transition: transform .2s;
}
.nav-dropdown:hover .nav-dropdown-caret { transform: rotate(180deg); }
.nav-dropdown-menu {
    display: none;
    position: absolute; top: calc(100% + 8px); left: 50%;
    transform: translateX(-50%);
    background: rgba(15,23,42,0.95);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    min-width: 160px; z-index: 100;
    padding: 6px 0;
    backdrop-filter: blur(10px);
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
    display: block; padding: 8px 16px;
    color: #94a3b8 !important;
    font-size: 14px; white-space: nowrap;
}
.nav-dropdown-menu a:hover {
    background: rgba(99,102,241,0.15);
    color: #a5b4fc !important;
}
.nav-dropdown-menu a.active {
    color: #a5b4fc !important;
    font-weight: 600;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .pub-nav { display: none; }
    .pub-container { padding: 0 16px; }
    .pub-footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}