/*
  Yantrottam Robotics - Premium Design System
  Theme: Industrial Cyber-Steel & Warning Amber
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette (HSL for precision) */
  --bg-base: hsl(220, 15%, 7%);       /* Deep matte carbon-black */
  --bg-surface: hsl(220, 12%, 12%);   /* Metallic slate grey */
  --bg-card: hsl(220, 12%, 16%);      /* Solid card grey */
  --primary: hsl(24, 100%, 50%);      /* Industrial Amber/Orange */
  --primary-hover: hsl(24, 100%, 43%);
  --accent: hsl(190, 100%, 45%);      /* Steel cool-blue for tech highlights */
  --text-primary: hsl(0, 0%, 98%);    /* Stark white */
  --text-secondary: hsl(215, 15%, 75%); /* Metallic light grey */
  --text-muted: hsl(215, 12%, 55%);   /* Muted grey */
  --border: hsl(220, 10%, 22%);       /* Dark industrial border */
  --border-light: hsl(220, 10%, 30%);
  
  /* Fonts */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Layout Tokens */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
  --shadow-inset: inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: var(--border-light);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Common Layout Components */
.section-padding {
  padding: 120px 24px;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 80px 16px;
  }
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

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

.max-w-xl {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* Header & Navigation */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(7, 8, 9, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition-smooth);
}

.header-nav.scrolled {
  background: rgba(7, 8, 9, 0.95);
  border-bottom: 1px solid var(--border-light);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-icon {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--bg-base);
  background: var(--primary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  letter-spacing: 0;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

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

.nav-menu {
  display: flex;
  gap: 32px;
  align-items: center;
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  gap: 8px;
}

.btn-primary {
  background: var(--primary);
  color: var(--bg-base);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border);
  box-shadow: var(--shadow-inset);
}

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 75% 35%, rgba(255, 107, 0, 0.08), transparent 50%),
              radial-gradient(circle at 20% 80%, rgba(0, 240, 255, 0.03), transparent 40%);
  pointer-events: none;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

@media (max-width: 991px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
}

.hero-tag {
  display: inline-block;
  color: var(--primary);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 4rem;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.8rem;
  }
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  line-height: 1.6;
}

.hero-btn-group {
  display: flex;
  gap: 16px;
}

@media (max-width: 991px) {
  .hero-btn-group {
    justify-content: center;
  }
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  border: 1px solid var(--border-light);
}

.hero-image {
  width: 100%;
  object-fit: cover;
  transition: transform 8s ease-out;
}

.hero-image-wrapper:hover .hero-image {
  transform: scale(1.04);
}

.hero-domain-badges {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

@media (max-width: 991px) {
  .hero-domain-badges {
    justify-content: center;
  }
}

.domain-badge {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
}

/* Countdown Clock Section */
.countdown-section {
  position: relative;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.countdown-box {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 60px;
  box-shadow: var(--shadow-premium);
}

@media (max-width: 768px) {
  .countdown-box {
    padding: 30px 16px;
  }
}

.countdown-tag {
  color: var(--primary);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  display: block;
}

.countdown-title {
  font-size: 2.2rem;
  margin-bottom: 40px;
}

/* The Bold Clock Layout */
.countdown-clock {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

@media (max-width: 768px) {
  .countdown-clock {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

.clock-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 16px;
  text-align: center;
  box-shadow: var(--shadow-inset);
  position: relative;
  overflow: hidden;
}

.clock-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
}

.clock-number {
  font-family: var(--font-heading);
  font-size: 4.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 8px;
}

@media (max-width: 576px) {
  .clock-number {
    font-size: 3rem;
  }
}

.clock-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.countdown-details {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Innovation / Game-Changers Section */
.section-header {
  margin-bottom: 80px;
}

.section-tag {
  color: var(--primary);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.8rem;
  margin-bottom: 20px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

@media (max-width: 991px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  box-shadow: var(--shadow-inset);
  transition: var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
}

.feature-icon-box {
  background: var(--bg-card);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
  font-size: 1.5rem;
  border: 1px solid var(--border);
}

.feature-card h3 {
  font-size: 1.35rem;
  margin-bottom: 16px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Products Section & Dynamic Spec Sheet */
.products-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tabs-container {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 50px;
}

.tab-btn {
  background: var(--bg-base);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.tab-btn.active, .tab-btn:hover {
  background: var(--primary);
  color: var(--bg-base);
  border-color: var(--primary);
}

.product-display-card {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
}

@media (max-width: 991px) {
  .product-display-card {
    grid-template-columns: 1fr;
  }
}

.product-image-container {
  height: 100%;
  min-height: 450px;
  position: relative;
  overflow: hidden;
  border-right: 1px solid var(--border-light);
}

@media (max-width: 991px) {
  .product-image-container {
    height: 350px;
    min-height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border-light);
  }
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.product-img.active {
  opacity: 1;
}

.product-details {
  padding: 60px;
}

@media (max-width: 768px) {
  .product-details {
    padding: 30px 20px;
  }
}

.product-title-block {
  margin-bottom: 24px;
}

.product-tagline {
  color: var(--primary);
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05rem;
  margin-bottom: 8px;
}

.product-title-text {
  font-size: 2.2rem;
}

.product-desc-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

@media (max-width: 576px) {
  .specs-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.spec-item {
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.spec-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 4px;
}

.spec-val {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-primary);
  font-weight: 600;
}

/* Fleet Configurator & ROI Calculator */
.configurator-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: start;
}

@media (max-width: 991px) {
  .configurator-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.config-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-inset);
}

@media (max-width: 768px) {
  .config-card {
    padding: 24px 16px;
  }
}

.config-title {
  font-size: 1.6rem;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 15px;
}

.config-group {
  margin-bottom: 28px;
}

.config-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.config-label span:last-child {
  color: var(--primary);
  font-family: var(--font-heading);
  font-size: 1.1rem;
}

.range-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--border-light);
  border-radius: 3px;
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.summary-card {
  background: var(--bg-surface);
  border: 1px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 40px;
  position: sticky;
  top: 120px;
}

@media (max-width: 768px) {
  .summary-card {
    padding: 24px 16px;
  }
}

.summary-title {
  font-size: 1.6rem;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.summary-item {
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.summary-item:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.summary-label {
  color: var(--text-secondary);
}

.summary-val {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.summary-val.highlight {
  color: var(--primary);
  font-size: 1.6rem;
}

/* Contact and Inquiry Section */
.contact-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 60px;
  align-items: center;
}

@media (max-width: 991px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.contact-info h3 {
  font-size: 2.2rem;
  margin-bottom: 20px;
}

.contact-info p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
}

.contact-icon-box {
  background: var(--bg-base);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.25rem;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.contact-item-text h4 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.contact-item-text p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.form-card {
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-premium);
}

@media (max-width: 768px) {
  .form-card {
    padding: 24px 16px;
  }
}

.form-title {
  font-size: 1.6rem;
  margin-bottom: 28px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

@media (max-width: 576px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.form-input:focus {
  border-color: var(--primary);
  outline: none;
}

textarea.form-input {
  resize: vertical;
}

/* Footer Styles */
.footer {
  background: var(--bg-base);
  padding: 80px 24px 40px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

@media (max-width: 991px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

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

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.footer-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

@media (max-width: 768px) {
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-domains {
  display: flex;
  gap: 16px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Success Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(7, 8, 9, 0.9);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-smooth);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  box-shadow: var(--shadow-premium);
  transform: scale(0.9);
  transition: var(--transition-smooth);
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

.modal-icon-box {
  width: 64px;
  height: 64px;
  background: rgba(255, 107, 0, 0.1);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 24px;
  border: 1px solid rgba(255, 107, 0, 0.2);
}

.modal-title {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}