/* ==========================================================================
   Sri Trishakti Infra Realtors - Design System & Core Stylesheet
   ========================================================================== */

:root {
  --primary-dark: #0f172a;
  --primary-navy: #1e293b;
  --accent-gold: #c59b27;
  --accent-gold-light: #e6ca65;
  --accent-gold-hover: #b0871e;
  --text-main: #334155;
  --text-muted: #64748b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s ease;
  --font-primary: 'Plus Jakarta Sans', sans-serif;
  --font-heading: 'Cormorant Garamond', serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-main);
  background-color: var(--bg-white);
  line-height: 1.6;
}

h1, h2, h3, h4, .brand-font {
  font-family: var(--font-heading);
  color: var(--primary-dark);
  font-weight: 700;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --- Utility Classes --- */
.container {
  width: 90%;
  max-width: 1240px;
  margin: 0 auto;
}

.section-padding {
  padding: 80px 0;
}

.text-center { text-align: center; }
.text-gold { color: var(--accent-gold); }
.bg-light { background-color: var(--bg-light); }

.section-title {
  font-size: 2.5rem;
  margin-bottom: 12px;
  text-transform: capitalize;
}

.section-subtitle {
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}

.btn-primary {
  background: var(--accent-gold);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-block;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  background: var(--accent-gold-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  display: inline-block;
}

.btn-outline:hover {
  background: var(--accent-gold);
  color: #fff;
}

/* --- Header & Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--accent-gold);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
}

.logo-text {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.1;
}

.logo-text span {
  display: block;
  font-size: 0.75rem;
  color: var(--accent-gold);
  font-family: var(--font-primary);
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: #e2e8f0;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-gold);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gold);
  transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.mobile-toggle {
  display: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 90vh;
  background: linear-gradient(rgba(15, 23, 42, 0.75), rgba(15, 23, 42, 0.85)), 
              url('https://images.unsplash.com/photo-1545324418-cc1a3fa10c00?auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
  display: flex;
  align-items: center;
  padding-top: 100px;
  color: #fff;
}

.hero-content {
  max-width: 750px;
}

.hero-title {
  font-size: 3.8rem;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.15rem;
  color: #cbd5e1;
  margin-bottom: 35px;
}

/* --- Search Filter Box --- */
.search-box {
  background: var(--bg-white);
  padding: 30px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  margin-top: -50px;
  position: relative;
  z-index: 10;
}

.search-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1px));
  gap: 15px;
  align-items: end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.form-control {
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-gold);
}

/* --- Cards & Grids --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--bg-white);
  padding: 35px 25px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-gold);
}

.service-icon {
  width: 60px;
  height: 60px;
  background: rgba(197, 155, 39, 0.1);
  color: var(--accent-gold);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.service-title {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.service-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

/* --- Property Cards --- */
.property-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.property-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.property-thumb {
  position: relative;
  height: 230px;
  overflow: hidden;
}

.property-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.property-card:hover .property-thumb img {
  transform: scale(1.05);
}

.property-badge {
  position: absolute;
  top: 15px;
  left: 15px;
  background: var(--primary-dark);
  color: var(--accent-gold-light);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
}

.property-details {
  padding: 24px;
}

.property-price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 8px;
}

.property-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.property-location {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.property-features {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Calculator & Interactive Widgets --- */
.calculator-card {
  background: var(--primary-dark);
  color: #fff;
  padding: 40px;
  border-radius: var(--radius-md);
}

.calc-output {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 25px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.calc-val {
  font-size: 2.5rem;
  color: var(--accent-gold);
  font-weight: 700;
}

/* --- Footer --- */
.footer {
  background: var(--primary-dark);
  color: #94a3b8;
  padding-top: 70px;
  padding-bottom: 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  margin: 20px 0;
  font-size: 0.95rem;
}

.footer-title {
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 20px;
  position: relative;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a:hover {
  color: var(--accent-gold);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 0.875rem;
}

/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
  .hero-title { font-size: 2.8rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-menu {
    position: fixed;
    top: 75px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 75px);
    background: var(--primary-dark);
    flex-direction: column;
    padding: 40px 0;
    transition: var(--transition);
  }
  .nav-menu.active { left: 0; }
  .mobile-toggle { display: block; }
}

@media (max-width: 576px) {
  .hero-title { font-size: 2.2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .search-form { grid-template-columns: 1fr; }
}