/* ==========================================================================
   LOGISEC LABS - CORE SPA STYLESHEET (PRODUCTION READY)
   ========================================================================== */

:root {
    --bg-color: #0A0A0A;
    --surface-color: #121212;
    --surface-card: #1A1A1A;
    --accent-color: #0070F3;
    --accent-glow: rgba(0, 112, 243, 0.15);
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --text-muted: #666666;
    --border-color: #262626;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    --max-width: 1200px;
    --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.mono {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    letter-spacing: 0;
}

/* Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: 8rem 0;
}

.text-center { text-align: center; }

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 4rem auto;
}

/* Shared Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-primary);
    border: 1px solid var(--accent-color);
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 112, 243, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.03);
}

/* Header & Navigation */
.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-text {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
}

.logo-text span {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition-smooth);
}

/* Background Circuits Effect */
.bg-circuit-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
    pointer-events: none;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    background: radial-gradient(circle at 50% 50%, #111111 0%, #0A0A0A 100%);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
}

.hero-tagline {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(0, 112, 243, 0.1);
    border: 1px solid rgba(0, 112, 243, 0.2);
    border-radius: 20px;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.about-tag {
    padding: 1.5rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.about-tag h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.about-tag p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 4px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Research Areas Grid */
.research-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.research-area-card {
    position: relative;
    height: 180px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.research-area-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.01);
}

.research-area-card .area-num {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    color: var(--text-muted);
}

.research-area-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

/* Methodology Timeline */
.methodology-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.methodology-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.methodology-timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.methodology-step {
    position: relative;
    display: flex;
    gap: 2.5rem;
    padding-left: 50px;
}

.methodology-marker {
    position: absolute;
    left: 11px;
    top: 4px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    z-index: 2;
}

.methodology-step:hover .methodology-marker {
    border-color: var(--accent-color);
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color);
}

.methodology-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.methodology-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Why Us Section */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.why-card {
    text-align: left;
    border-left: 2px solid var(--border-color);
    padding-left: 1.5rem;
}

.why-card:hover {
    border-left-color: var(--accent-color);
}

.why-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
}

.why-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Call To Action Block */
.cta-block {
    background: linear-gradient(135deg, #111111 0%, #161616 100%);
    border: 1px solid var(--border-color);
    padding: 5rem 2rem;
    border-radius: 4px;
    text-align: center;
}

.cta-block h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-block p {
    color: var(--text-secondary);
    max-width: 550px;
    margin: 0 auto 2.5rem auto;
}

/* Contact Forms Formats */
.contact-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.form-control {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

textarea.form-control {
    resize: vertical;
    min-height: 160px;
}

.contact-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.info-block h3 {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.info-block p, .info-block a {
    font-size: 1.2rem;
    font-weight: 500;
}

/* Footer Layout Rules */
.site-footer {
    border-top: 1px solid var(--border-color);
    background: var(--surface-color);
    padding: 5rem 0 3rem 0;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    gap: 3rem;
}

.footer-brand h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-brand h2 span {
    color: var(--accent-color);
}

.footer-links {
    display: flex;
    gap: 4.5rem;
    flex-wrap: wrap;
}

.footer-col h4 {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-col a:hover {
    color: var(--text-primary);
}

/* Minimal Integrated Inline Profile Layout */
.profile-col {
    min-width: 130px;
}

.profile-name {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.profile-socials-row {
    display: flex;
    gap: 0.85rem;
}

.profile-socials-row a {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted) !important;
    font-weight: bold;
}

.profile-socials-row a:hover {
    color: var(--text-primary) !important;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive Overrides */
@media (max-width: 968px) {
    .hero-title { font-size: 3.25rem; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
    .research-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-color);
        border-bottom: 1px solid var(--border-color);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        display: none;
    }
    .nav-menu.active { display: flex; }
    .nav-menu li { width: 100%; }
    .nav-link { display: block; padding: 1rem 2rem; }
    .nav-toggle { display: block; }
}

@media (max-width: 640px) {
    .hero-title { font-size: 2.5rem; }
    .research-grid { grid-template-columns: 1fr; }
    .footer-top { flex-direction: column; gap: 2.5rem; }
    .footer-links { flex-direction: column; gap: 2.5rem; }
    .section-title { font-size: 2rem; }
}