/* =============================================
   Balaji Anusandhan — Main Stylesheet
   Clean · Professional · Trustworthy
   ============================================= */

/* ----- CSS Variables ----- */
:root {
  --color-white: #ffffff;
  --color-bg: #faf7f2;
  --color-bg-alt: #f3efe8;
  --color-surface: #ffffff;
  --color-border: #ddd6cb;
  --color-border-light: #e9e4db;
  --color-text: #1c1814;
  --color-text-secondary: #5c5248;
  --color-text-muted: #91877a;
  --color-primary: #0f1e3d;
  --color-primary-light: #162a4a;
  --color-primary-dark: #0a142b;
  --color-accent: #c9953c;
  --color-accent-light: #d4a84b;
  --color-accent-dark: #a87a2e;
  --color-green: #7d9f6e;
  --color-green-bg: rgba(125, 159, 110, 0.1);
  --color-rose: #c46a6a;
  --color-rose-bg: rgba(196, 106, 106, 0.1);
  --color-gold: #b8860b;
  --color-gold-bg: rgba(184, 134, 11, 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1120px;
  --nav-height: 68px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
  --transition: 0.2s ease;
}

/* ----- Reset & Base ----- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ----- Selection ----- */
::selection {
  background: var(--color-accent);
  color: #fff;
}

/* ----- Section Shared ----- */
.section-padding {
  padding: 88px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 52px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--color-text);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

/* ----- Navigation ----- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255, 255, 255, 0.98);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

.logo-icon {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 8px;
  color: #fff;
  font-size: 0.9rem;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(15, 30, 61, 0.06);
}

.contact-link-nav {
  background: var(--color-primary) !important;
  color: #fff !important;
  padding: 10px 22px !important;
  margin-left: 8px;
}

.contact-link-nav:hover {
  background: var(--color-primary-light) !important;
  color: #fff !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ----- Hero Section ----- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #faf7f2 0%, #f3efe8 100%);
  overflow: hidden;
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--color-accent);
  background: rgba(201, 149, 60, 0.08);
  border: 1px solid rgba(201, 149, 60, 0.15);
  padding: 8px 18px;
  border-radius: 6px;
  width: fit-content;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.hero-highlight {
  color: var(--color-accent);
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-figure {
  display: flex;
  align-items: baseline;
  gap: 1px;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-suffix {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  max-width: 340px;
  width: 100%;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}

.hero-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.hero-card i.fa-graduation-cap {
  font-size: 2.6rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.hero-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.hero-card-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 500;
}

/* ----- Services Section ----- */
.services {
  padding: 88px 0;
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  cursor: default;
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 10px;
  margin-bottom: 18px;
  font-size: 1.2rem;
  color: #fff;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: var(--transition);
}

.service-link:hover {
  gap: 10px;
}

/* ----- Pricing Section ----- */
.pricing {
  padding: 88px 0;
  background: var(--color-bg);
}

.pricing-category {
  margin-bottom: 44px;
}

.pricing-cat-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
}

.pricing-cat-title i {
  color: var(--color-accent);
  font-size: 1rem;
}

.pricing-table {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
}

.pricing-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 16px;
  padding: 14px 24px;
  align-items: center;
  border-bottom: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.pricing-row:last-child {
  border-bottom: none;
}

.pricing-row:hover {
  background: var(--color-bg);
}

.pricing-row.header-row {
  background: var(--color-bg-alt);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
}

.pricing-row.header-row:hover {
  background: var(--color-bg-alt);
}

.col-service {
  font-weight: 600;
  color: var(--color-text);
}

.col-price {
  font-weight: 700;
  color: var(--color-accent-dark);
  font-size: 1rem;
}

.col-rush {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
}

.pricing-note {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pricing-note i {
  color: var(--color-accent);
}

/* Delivery Info Cards */
.delivery-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 44px;
}

.delivery-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.delivery-card.highlight {
  border-color: var(--color-accent);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
}

.delivery-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--color-text);
}

.delivery-card h4 i {
  color: var(--color-accent);
}

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

.delivery-tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(201, 149, 60, 0.08);
  padding: 4px 12px;
  border-radius: 4px;
}

/* ----- Features Section ----- */
.features {
  padding: 88px 0;
  background: var(--color-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  border-radius: 12px;
  margin: 0 auto 18px;
  font-size: 1.3rem;
  color: #fff;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ----- Offers Section ----- */
.offers {
  padding: 88px 0;
  background: var(--color-bg);
}

.offers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.offer-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.offer-card:hover {
  box-shadow: var(--shadow-md);
}

.offer-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 18px;
}

.papers-offer .offer-badge {
  color: var(--color-gold);
  background: var(--color-gold-bg);
}

.patent-offer .offer-badge {
  color: var(--color-green);
  background: var(--color-green-bg);
}

.referral-offer .offer-badge {
  color: var(--color-rose);
  background: var(--color-rose-bg);
}

.offer-card ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.offer-card li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.offer-card li strong {
  color: var(--color-text);
  font-weight: 600;
}

.offer-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  background: var(--color-bg-alt);
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--color-primary);
}

.offer-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  background: rgba(201, 149, 60, 0.1);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--color-accent);
}

.offer-text {
  flex: 1;
  min-width: 0;
}

/* ----- Contact Section ----- */
.contact {
  padding: 88px 0;
  background: var(--color-surface);
}

.contact-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.contact-inner .section-tag {
  margin-bottom: 12px;
}

.contact-inner h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.contact-desc {
  color: var(--color-text-secondary);
  font-size: 1rem;
  margin-bottom: 40px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border-light);
  text-align: left;
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row-icon {
  flex-shrink: 0;
  width: 20px;
  color: var(--color-accent);
  font-size: 0.95rem;
  text-align: center;
}

.contact-row-label {
  flex-shrink: 0;
  width: 130px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.contact-row-value {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  word-break: break-all;
}

a.contact-row-value:hover {
  color: var(--color-accent);
}

.contact-row-note {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.contact-row-muted .contact-row-value {
  color: var(--color-text-muted);
  font-weight: 400;
  font-size: 0.85rem;
}

/* ----- Footer ----- */
.footer {
  padding: 56px 0 0;
  background: #0f1e3d;
  color: #d4cfc8;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-accent);
}

.footer-brand .logo-text {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.footer-brand .logo-highlight {
  color: var(--color-accent);
}

.footer-brand p {
  color: #b8b0a6;
  font-size: 0.88rem;
  line-height: 1.6;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #b8b0a6;
  margin-bottom: 16px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links li a {
  color: #8f867b;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-links li a:hover {
  color: var(--color-accent-light);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-contact a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #8f867b;
  font-size: 0.88rem;
  transition: var(--transition);
}

.footer-contact a:hover {
  color: var(--color-accent-light);
}

.footer-contact i {
  color: var(--color-accent-light);
  width: 16px;
}

.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}

.footer-bottom p {
  color: #6d665c;
  font-size: 0.82rem;
}

/* ----- Scroll Reveal Animations ----- */
.reveal-hidden {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.reveal-hidden.revealed {
  opacity: 1;
  transform: translateY(0);
}

.service-card:nth-child(1),
.feature-card:nth-child(1) { transition-delay: 0.03s; }
.service-card:nth-child(2),
.feature-card:nth-child(2) { transition-delay: 0.06s; }
.service-card:nth-child(3),
.feature-card:nth-child(3) { transition-delay: 0.09s; }
.service-card:nth-child(4),
.feature-card:nth-child(4) { transition-delay: 0.12s; }
.service-card:nth-child(5),
.feature-card:nth-child(5) { transition-delay: 0.15s; }
.service-card:nth-child(6),
.feature-card:nth-child(6) { transition-delay: 0.18s; }

/* ----- Toast Notification ----- */
/* ----- Media Queries ----- */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .hero-subtitle {
    max-width: 100%;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }


}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-toggle {
    display: flex;
  }

  .contact-link-nav {
    margin-left: 0 !important;
    text-align: center;
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 28px;
  }

  .pricing-row {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    padding: 12px 16px;
    font-size: 0.88rem;
  }

  .pricing-row.header-row {
    display: none;
  }

  .pricing-cat-title {
    font-size: 1.05rem;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .offers-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  :root {
    --nav-height: 60px;
  }

  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .pricing-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .pricing-row .col-rush {
    font-size: 0.83rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .section-padding {
    padding: 60px 0;
  }
}