/* ===== KORETECH Corporate Website Styles ===== */

:root {
  --color-bg: #0a0e1a;
  --color-bg-secondary: #111827;
  --color-bg-card: #1a2236;
  --color-bg-card-hover: #1f2a42;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-accent: #6366f1;
  --color-accent-light: #818cf8;
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --gradient-text: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #a78bfa 100%);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(10, 14, 26, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
}

.logo-icon svg {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link--cta {
  background: var(--gradient-primary);
  color: white !important;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
}

.nav__link--cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.hero__orb--1 {
  width: 500px;
  height: 500px;
  background: var(--color-primary);
  top: -10%;
  right: -10%;
}

.hero__orb--2 {
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  bottom: -5%;
  left: -5%;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, -20px) scale(1.05); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.25);
  color: var(--color-primary);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.pulse {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}

.btn--primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14, 165, 233, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn--full {
  width: 100%;
}

.hero__stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.stat__number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

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

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section__header {
  margin-bottom: 3.5rem;
  max-width: 640px;
}

.section__header--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section__tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section__desc {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ===== About ===== */
.about {
  background: var(--color-bg-secondary);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.about__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
}

.about__card:hover {
  background: var(--color-bg-card-hover);
  border-color: rgba(14, 165, 233, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.about__icon {
  width: 48px;
  height: 48px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

.about__icon svg {
  width: 24px;
  height: 24px;
}

.about__card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.about__card p {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  line-height: 1.65;
}

/* ===== Projects ===== */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: rgba(14, 165, 233, 0.25);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.project-card--wide {
  grid-column: 1 / -1;
  flex-direction: row;
}

.project-card__visual {
  position: relative;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-card--wide .project-card__visual {
  min-width: 280px;
  min-height: auto;
}

.project-card__visual--taxibot {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.15) 0%, rgba(99, 102, 241, 0.1) 100%);
}

.project-card__visual--nutri {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(14, 165, 233, 0.1) 100%);
}

.project-card__visual--commerce {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15) 0%, rgba(239, 68, 68, 0.1) 100%);
}

.project-card__visual--premiere {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.15) 0%, rgba(99, 102, 241, 0.1) 100%);
}

.project-card__icon-wrap {
  color: var(--color-primary);
}

.project-card__icon-wrap svg {
  width: 64px;
  height: 64px;
}

.project-card__badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.project-card__body {
  padding: 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.project-card__desc {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  line-height: 1.65;
  margin-bottom: 1rem;
  flex: 1;
}

.project-card__desc strong {
  color: var(--color-primary);
  font-weight: 600;
}

.project-card__features {
  list-style: none;
  margin-bottom: 1.25rem;
}

.project-card__features li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 0.4rem;
}

.project-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.project-card__link svg {
  width: 16px;
  height: 16px;
  transition: var(--transition);
}

.project-card__link:hover {
  color: var(--color-accent-light);
}

.project-card__link:hover svg {
  transform: translate(2px, -2px);
}

.project-card__links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ===== Tech ===== */
.tech {
  background: var(--color-bg-secondary);
}

.tech__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.tech__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.tech__item:hover {
  border-color: rgba(14, 165, 233, 0.3);
  color: var(--color-text);
  background: var(--color-bg-card-hover);
}

/* ===== Contact ===== */
.contact__wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact__details {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact__item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  text-decoration: none;
  color: inherit;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  transition: var(--transition);
}

a.contact__item:hover {
  border-color: rgba(14, 165, 233, 0.3);
  background: var(--color-bg-card-hover);
}

.contact__item-icon {
  width: 44px;
  height: 44px;
  background: rgba(14, 165, 233, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__item-icon svg {
  width: 20px;
  height: 20px;
}

.contact__item-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.contact__item-value {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
}

.contact__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.contact__card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.925rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 2rem;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.75rem;
}

.footer__tagline {
  color: var(--color-text-muted);
  font-size: 0.925rem;
  max-width: 320px;
}

.footer__links {
  display: flex;
  gap: 3rem;
}

.footer__col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.footer__col ul {
  list-style: none;
}

.footer__col li {
  margin-bottom: 0.5rem;
}

.footer__col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer__col a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer__legal {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.footer__address {
  font-size: 0.8rem;
  color: rgba(148, 163, 184, 0.7);
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
  .projects__grid {
    grid-template-columns: 1fr;
  }

  .project-card--wide {
    flex-direction: column;
  }

  .project-card--wide .project-card__visual {
    min-width: auto;
    min-height: 180px;
  }

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

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

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

  .nav__menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav__menu li {
    width: 100%;
  }

  .nav__link {
    display: block;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--color-border);
  }

  .nav__link--cta {
    text-align: center;
    margin-top: 0.5rem;
    border: none;
  }

  .hero__stats {
    gap: 1.5rem;
  }

  .footer__links {
    flex-direction: column;
    gap: 1.5rem;
  }
}

/* ===== Animations on scroll ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}