/* ═══════════════════════════════════════════
   TecOnca Data Solutions — Styles
   ═══════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --primary: #0f1b2d;
  --primary-light: #1a2d4a;
  --secondary: #e67e22;
  --secondary-light: #f39c12;
  --accent: #00b894;
  --accent-light: #00d4aa;
  --text: #2d3748;
  --text-light: #718096;
  --text-on-dark: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f7f8fc;
  --bg-dark: #0f1b2d;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

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

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition);
  background: transparent;
}

.header.scrolled {
  background: rgba(15, 27, 45, 0.95);
  backdrop-filter: blur(20px);
  padding: 12px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
}

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

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

.nav-menu a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--secondary);
  transition: width var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #fff;
}

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

/* Language Selector */
.lang-selector {
  display: flex;
  gap: 4px;
  margin-left: 16px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 4px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.lang-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.lang-btn.active {
  background: var(--secondary);
  color: #fff;
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  transition: all var(--transition);
  border-radius: 2px;
}

.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 {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(
    135deg,
    var(--primary) 0%,
    var(--primary-light) 50%,
    #1e3a5f 100%
  );
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(
    circle,
    rgba(230, 126, 34, 0.08) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(0, 184, 148, 0.06) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

/* Grid Pattern Overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px
  );
  background-size: 40px 40px;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-content {
  max-width: 720px;
}

.hero-content h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 40px;
  line-height: 1.8;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  color: #fff;
  box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(230, 126, 34, 0.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

/* Floating Data Visualization */
.hero-visual {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 420px;
  height: 420px;
  z-index: 1;
}

.data-node {
  position: absolute;
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.data-node:nth-child(1) {
  width: 120px;
  height: 120px;
  background: linear-gradient(
    135deg,
    rgba(230, 126, 34, 0.2),
    rgba(230, 126, 34, 0.05)
  );
  border: 1px solid rgba(230, 126, 34, 0.2);
  top: 10%;
  left: 20%;
  animation-delay: 0s;
}

.data-node:nth-child(2) {
  width: 80px;
  height: 80px;
  background: linear-gradient(
    135deg,
    rgba(0, 184, 148, 0.2),
    rgba(0, 184, 148, 0.05)
  );
  border: 1px solid rgba(0, 184, 148, 0.2);
  top: 50%;
  left: 60%;
  animation-delay: -2s;
}

.data-node:nth-child(3) {
  width: 60px;
  height: 60px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.02)
  );
  border: 1px solid rgba(255, 255, 255, 0.1);
  top: 70%;
  left: 25%;
  animation-delay: -4s;
}

.data-node:nth-child(4) {
  width: 40px;
  height: 40px;
  background: linear-gradient(
    135deg,
    rgba(230, 126, 34, 0.15),
    rgba(230, 126, 34, 0.03)
  );
  border: 1px solid rgba(230, 126, 34, 0.15);
  top: 25%;
  left: 70%;
  animation-delay: -1s;
}

.data-node:nth-child(5) {
  width: 90px;
  height: 90px;
  background: linear-gradient(
    135deg,
    rgba(0, 184, 148, 0.15),
    rgba(0, 184, 148, 0.03)
  );
  border: 1px solid rgba(0, 184, 148, 0.15);
  top: 40%;
  left: 10%;
  animation-delay: -3s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  33% {
    transform: translateY(-20px) rotate(5deg);
  }
  66% {
    transform: translateY(10px) rotate(-3deg);
  }
}

/* ── Section Base ── */
.section {
  padding: 100px 0;
}

.section-tag {
  display: inline-block;
  color: var(--secondary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-light);
  max-width: 620px;
  line-height: 1.8;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .section-subtitle {
  margin: 0 auto;
}

/* ── About Section ── */
.about {
  background: var(--bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text p {
  color: var(--text-light);
  font-size: 1.02rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.stat-card {
  background: var(--bg);
  padding: 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-value {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-light);
  font-weight: 500;
}

/* ── Services Section ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg);
  padding: 36px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.service-icon.eng {
  background: rgba(230, 126, 34, 0.1);
  color: var(--secondary);
}
.service-icon.bi {
  background: rgba(0, 184, 148, 0.1);
  color: var(--accent);
}
.service-icon.analytics {
  background: rgba(52, 152, 219, 0.1);
  color: #3498db;
}
.service-icon.governance {
  background: rgba(155, 89, 182, 0.1);
  color: #9b59b6;
}
.service-icon.cloud {
  background: rgba(26, 45, 74, 0.1);
  color: var(--primary-light);
}
.service-icon.training {
  background: rgba(231, 76, 60, 0.1);
  color: #e74c3c;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ── Projects Section ── */
.projects {
  background: var(--bg-alt);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
}

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

.project-header {
  background: linear-gradient(
    135deg,
    var(--primary),
    var(--primary-light)
  );
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.project-header::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -30%;
  width: 150px;
  height: 150px;
  background: radial-gradient(
    circle,
    rgba(230, 126, 34, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
}

.project-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
  position: relative;
  z-index: 1;
}

.project-client {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
  position: relative;
  z-index: 1;
}

.project-body {
  padding: 24px 28px;
}

.project-body p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.project-tag {
  background: rgba(230, 126, 34, 0.08);
  color: var(--secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.3px;
}

/* ── Contact Section ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

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

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(230, 126, 34, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 2px;
}

.contact-item p {
  font-size: 0.92rem;
  color: var(--text-light);
}

.contact-form {
  background: var(--bg);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.92rem;
  color: var(--text);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--secondary);
}

.form-group textarea {
  height: 140px;
  resize: vertical;
}

.form-success {
  display: none;
  background: rgba(0, 184, 148, 0.1);
  color: var(--accent);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 0.9rem;
  font-weight: 500;
}

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

/* ── Footer ── */
.footer {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.88rem;
  padding: 6px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding: 24px 0;
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.82rem;
}

/* ── Scroll Animations ── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* animation delay helpers */
.delay-1 {
  transition-delay: 0.1s;
}
.delay-2 {
  transition-delay: 0.2s;
}
.delay-3 {
  transition-delay: 0.3s;
}
.delay-4 {
  transition-delay: 0.4s;
}
.delay-5 {
  transition-delay: 0.5s;
}
.delay-6 {
  transition-delay: 0.6s;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .hero-visual {
    display: none;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-content p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .services-grid,
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 40px;
    transition: right var(--transition);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-menu a {
    font-size: 1.1rem;
  }

  .lang-selector {
    margin-left: 0;
    margin-top: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 70px 0;
  }

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

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

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: 20px;
  }
}