/* -------------------------------------------------------------
 * AGASTHYAA BHARAT CONSTRUCTION (DIV-02)
 * AUTHORITATIVE CORPORATE DESIGN SYSTEM (PHASE 523/529-A)
 * ------------------------------------------------------------- */

:root {
    --bg-primary: #070B11;
    --bg-secondary: #0D1520;
    --bg-card: rgba(18, 26, 38, 0.75);
    --border-color: rgba(249, 115, 22, 0.18);
    --border-focus: #F97316;
    
    --accent-safety: #F97316;
    --accent-amber: #FB923C;
    --accent-glow: rgba(249, 115, 22, 0.22);
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Container */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Top Gateway Bar */
.top-gateway-bar {
    background: #04070B;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding: 0.5rem 0;
}

.gateway-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.gateway-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #22C55E;
    border-radius: 50%;
    box-shadow: 0 0 8px #22C55E;
}

.gateway-link {
    color: var(--accent-amber);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.gateway-link:hover {
    color: #FFF;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 11, 17, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #FFF;
}

.brand-symbol {
    font-size: 2rem;
    line-height: 1;
}

.brand-group {
    display: block;
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    font-weight: 600;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--accent-safety);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: #FFF;
}

.nav-btn-primary {
    background: var(--accent-safety);
    color: #070B11 !important;
    font-weight: 700 !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-full);
    box-shadow: 0 0 15px var(--accent-glow);
}

.nav-btn-primary:hover {
    background: #FFA04D;
    box-shadow: 0 0 25px rgba(249, 115, 22, 0.4);
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 6rem 0 5rem;
    text-align: center;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.15) 0%, rgba(7, 11, 17, 0) 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid var(--border-color);
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-safety);
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-safety);
    border-radius: 50%;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    max-width: 900px;
    margin: 0 auto 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, #F97316 0%, #FBBF24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 760px;
    margin: 0 auto 2.5rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-bottom: 4rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.85rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--accent-safety);
    color: #070B11;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    background: #FFA04D;
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #FFF;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #FFF;
}

.btn-block {
    width: 100%;
}

/* Hero Metrics */
.hero-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.metric-val {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-safety);
}

.metric-lbl {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-dark {
    background: var(--bg-secondary);
}

.section-header {
    margin-bottom: 3.5rem;
}

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

.section-tag {
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.15em;
    color: var(--accent-safety);
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* Grids */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Feature Cards */
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--border-focus);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Project Cards */
.project-card {
    background: #0A101A;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 2rem;
    border-radius: var(--radius-md);
    position: relative;
}

.project-badge {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent-amber);
    margin-bottom: 0.75rem;
}

.project-card h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8125rem;
    color: var(--accent-safety);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 1rem;
}

/* Telemetry Banner */
.telemetry-banner {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.1) 0%, rgba(13, 21, 32, 0.9) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3.5rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.telemetry-content h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    margin: 0.5rem 0 1rem;
}

.telemetry-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.telemetry-list {
    list-style: none;
    color: var(--text-primary);
    font-weight: 500;
}

.telemetry-list li {
    margin-bottom: 0.5rem;
}

.telemetry-stat-card {
    background: rgba(7, 11, 17, 0.8);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-highlight {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-safety);
}

.stat-desc {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Tender Form */
.tender-form-card {
    background: #0A101A;
    border: 1px solid var(--border-color);
    padding: 3rem;
    border-radius: var(--radius-lg);
    max-width: 840px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    background: #04070B;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    color: #FFF;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-safety);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.3);
}

/* Footer */
.footer {
    background: #04070B;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-symbol {
    font-size: 2rem;
}

.footer-brand-title {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
}

.footer-brand-sub {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--accent-safety);
}

.footer-bio {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.footer-parent-link a {
    color: var(--accent-amber);
    font-size: 0.875rem;
    text-decoration: none;
    font-weight: 600;
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: #FFF;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 0.65rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-col ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: #FFF;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 2rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Responsive */
@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-metrics { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .telemetry-banner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2.25rem; }
    .grid-3 { grid-template-columns: 1fr; }
    .hero-metrics { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-bottom-flex { flex-direction: column; gap: 1rem; text-align: center; }
}