/* ===================================================
   TECHINDEV — Landing Page Styles
   Paleta: Navy #0B1120 | Cyan #00D4FF | Teal #0891B2
   =================================================== */

:root {
  --bg-dark:      #0B1120;
  --bg-dark-2:    #0F1A2E;
  --bg-card:      #131F35;
  --bg-card-hover:#1A2B47;
  --accent:       #00D4FF;
  --accent-2:     #0891B2;
  --accent-glow:  rgba(0, 212, 255, 0.15);
  --text-primary: #F0F4FF;
  --text-secondary:#94A3B8;
  --border:       rgba(0, 212, 255, 0.12);
  --border-hover: rgba(0, 212, 255, 0.35);
  --radius:       12px;
  --radius-lg:    20px;
  --font-body:    'Inter', sans-serif;
  --font-display: 'Space Grotesk', sans-serif;
  --transition:   0.25s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, textarea, select {
  font: inherit;
  background: var(--bg-dark);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
select option { background: var(--bg-dark-2); }
textarea { resize: vertical; }

/* ---- Utilities ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.gradient-text {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section {
  padding: 6rem 0;
}
.section--dark {
  background: var(--bg-dark-2);
}
.section__header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 4rem;
}
.section__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.section__subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg-dark);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 212, 255, 0.35);
}
.btn--outline {
  border: 1.5px solid var(--border-hover);
  color: var(--text-primary);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.btn--ghost {
  color: var(--text-primary);
  border: 1.5px solid rgba(255,255,255,0.15);
}
.btn--ghost:hover {
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.05);
}
.btn--full { width: 100%; justify-content: center; }

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition);
}
.navbar.scrolled {
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
}
.navbar__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.navbar__links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
}
.navbar__links a:hover { color: var(--text-primary); }
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.navbar__toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.navbar__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle.open span:nth-child(2) { opacity: 0; }
.navbar__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
  overflow: hidden;
}
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, black 20%, transparent 100%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero__content {
  position: relative;
  text-align: center;
  padding: 3rem 0;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.4rem 1.1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.75rem;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  max-width: 820px;
  margin: 0 auto 1.5rem;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}
.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}
.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.stat {
  text-align: center;
}
.stat__number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
}
.stat p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}
.stat__divider {
  width: 1px;
  height: 48px;
  background: var(--border);
}
.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.2; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.05); }
}

/* ---- Services ---- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.1);
}
.service-card__icon {
  width: 52px;
  height: 52px;
  background: var(--accent-glow);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}
.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.25rem;
}
.service-card__tags span {
  background: rgba(0,212,255,0.08);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
}

/* ---- About ---- */
.about__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about__text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}
.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.about__tags span {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  border-radius: 100px;
}
.about__cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.about__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color var(--transition);
}
.about__card:hover { border-color: var(--border-hover); }
.about__card-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}
.about__card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.about__card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

/* ---- Portfolio ---- */
.portfolio__filters {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.45rem 1rem;
  border-radius: 100px;
  transition: all var(--transition);
}
.filter-btn:hover,
.filter-btn--active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}
.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}
.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.portfolio-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(0, 212, 255, 0.1);
}
.portfolio-card__thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--bg-dark-2), var(--bg-card-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.portfolio-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.portfolio-card__body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.portfolio-card__category {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.portfolio-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.portfolio-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  flex: 1;
  margin-bottom: 1rem;
}
.portfolio-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.portfolio-card__tags span {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
}
.portfolio__empty {
  grid-column: 1/-1;
  text-align: center;
  padding: 4rem;
  color: var(--text-secondary);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

/* ---- Contact ---- */
.contact__layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 5rem;
  align-items: start;
}
.contact__info p { color: var(--text-secondary); margin-bottom: 2rem; line-height: 1.7; }
.contact__links { display: flex; flex-direction: column; gap: 1rem; }
.contact__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition);
}
.contact__link:hover { color: var(--accent); }
.contact__link-icon { font-size: 1.2rem; }
.contact__form { display: flex; flex-direction: column; gap: 1.25rem; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form__group { display: flex; flex-direction: column; gap: 0.4rem; }
.form__group label { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); }
.form__feedback {
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.4em;
  transition: color var(--transition);
}
.form__feedback.success { color: #4ade80; }
.form__feedback.error   { color: #f87171; }

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
}
.footer__copy { font-size: 0.85rem; color: var(--text-secondary); }
.footer__links {
  display: flex;
  gap: 1.5rem;
}
.footer__links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--text-primary); }

/* ---- Founder ---- */
.founder {
  margin-top: 4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  transition: border-color var(--transition);
}
.founder:hover { border-color: var(--border-hover); }
.founder__avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--bg-dark);
  flex-shrink: 0;
}
.founder__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.founder__bio {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}
.founder__linkedin {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border-hover);
  border-radius: 100px;
  padding: 0.4rem 1rem;
  transition: background var(--transition), box-shadow var(--transition);
}
.founder__linkedin:hover {
  background: var(--accent-glow);
  box-shadow: 0 0 12px var(--accent-glow);
}
@media (max-width: 600px) {
  .founder { flex-direction: column; align-items: center; text-align: center; }
  .founder__linkedin { align-self: center; }
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .about__layout,
  .contact__layout { grid-template-columns: 1fr; gap: 3rem; }
  .about__cards { flex-direction: row; flex-wrap: wrap; }
  .about__card { flex: 1; min-width: 220px; }
}
@media (max-width: 768px) {
  .navbar__links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(11,17,32,0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    transform: translateY(-110%);
    transition: transform var(--transition);
    border-bottom: 1px solid var(--border);
  }
  .navbar__links.open { transform: translateY(0); }
  .navbar__toggle { display: flex; }
  .form__row { grid-template-columns: 1fr; }
  .hero__stats { gap: 1.25rem; }
  .stat__divider { display: none; }
  .portfolio__grid,
  .services__grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .section { padding: 4rem 0; }
  .hero__actions { flex-direction: column; align-items: center; }
}