/* ============================================
   Tooark — Design System & Styles
   ============================================ */

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

:root {
  --color-bg: #0a0a0b;
  --color-bg-alt: #111113;
  --color-surface: #18181b;
  --color-surface-hover: #1f1f23;
  --color-border: #27272a;
  --color-border-light: #3f3f46;
  --color-text: #fafafa;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;
  --color-primary: #f59e0b;
  --color-primary-hover: #d97706;
  --color-primary-bg: rgba(245, 158, 11, 0.1);
  --color-accent: #10b981;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --transition: 0.2s ease;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.938rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #000;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}

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

.btn--outline:hover {
  border-color: var(--color-text-secondary);
  background: var(--color-surface);
  transform: translateY(-1px);
}

/* --- Badge --- */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  vertical-align: middle;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__logo img {
  filter: invert(1);
}

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

.header__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

.header__link--github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.header__link--github:hover {
  border-color: var(--color-border-light);
  background: var(--color-surface);
  color: var(--color-text);
}

.header__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.header__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
  text-align: center;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(245, 158, 11, 0.08), transparent),
    radial-gradient(ellipse 80% 40% at 50% 100%, rgba(16, 185, 129, 0.05), transparent);
  pointer-events: none;
}

.hero__inner {
  position: relative;
}

.hero__logo {
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease;
}

.hero__logo img {
  margin: 0 auto;
  filter: invert(1);
  opacity: 0.9;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero__subtitle strong {
  color: var(--color-text);
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: 64px;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.hero__stat {
  text-align: center;
}

.hero__stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.hero__stat-label {
  font-size: 0.813rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

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

.section--alt {
  background: var(--color-bg-alt);
}

.section__header {
  text-align: center;
  margin-bottom: 56px;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section__desc {
  font-size: 1.063rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ============================================
   PROJECTS
   ============================================ */
.projects__filters {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.813rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--color-border-light);
  color: var(--color-text);
  background: var(--color-surface);
}

.filter-btn.active {
  background: var(--color-primary);
  color: #000;
  border-color: var(--color-primary);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.projects__loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--color-text-muted);
}

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

/* Project Card */
.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.project-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.project-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
}

.project-card__visibility {
  font-size: 0.688rem;
  padding: 2px 8px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 20px;
}

.project-card__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

.project-card__meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.project-card__lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.project-card__meta-item svg {
  opacity: 0.7;
}

/* ============================================
   CATEGORIES
   ============================================ */
.categories__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.category-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.category-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.category-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.category-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================
   SERVICES
   ============================================ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 56px;
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.03), transparent);
  pointer-events: none;
}

.service-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
}

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.service-card__title {
  font-size: 1.063rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.service-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.services__cta {
  text-align: center;
  padding: 40px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.services__cta p {
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  font-size: 1.063rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 700;
}

.footer__logo img {
  filter: invert(1);
}

.footer__tagline {
  font-size: 0.813rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.footer__links {
  display: flex;
  gap: 24px;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color var(--transition);
}

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

.footer__copy p {
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: all 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .header__nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }

  .header__nav.open {
    transform: translateX(0);
  }

  .header__link {
    font-size: 1.125rem;
  }

  .header__toggle {
    display: flex;
  }

  .header__toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  .header__toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    padding: 120px 0 80px;
  }

  .hero__logo img {
    width: 120px;
    height: 120px;
  }

  .hero__stats {
    gap: 32px;
  }

  .hero__stat-value {
    font-size: 1.5rem;
  }

  .section {
    padding: 72px 0;
  }

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

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
    max-width: 280px;
  }

  .hero__stats {
    flex-direction: column;
    gap: 16px;
  }
}