/* SECTION: Design Tokens */
:root {
  /* Colors */
  --color-bg-primary: #050816;
  --color-bg-secondary: #070c1b;
  --color-surface: #0b1220;
  --color-surface-alt: #020617;
  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-border-subtle: rgba(148, 163, 184, 0.25);
  --color-accent: #38bdf8;
  --color-accent-soft: rgba(56, 189, 248, 0.12);
  --color-accent-strong: #0ea5e9;
  --color-danger: #f97373;

  /* Accent RGB for glows */
  --accent-rgb: 56, 189, 248;

  /* Typography */
  --font-sans: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  --shadow-soft: 0 1px 2px rgba(15, 23, 42, 0.35), 0 10px 25px rgba(15, 23, 42, 0.4);
  --shadow-strong: 0 20px 60px rgba(15, 23, 42, 0.95);

  --transition-fast: 150ms ease-out;
  --transition-med: 220ms ease;

  --layout-max-width: 960px;
  --layout-page-x: 24px;
  --layout-page-y: 40px;

  --nav-height: 64px;
}

/* SECTION: Base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  background: radial-gradient(circle at top left, #1d2240 0, #050816 55%);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  text-decoration: underline;
}

button,
input,
textarea {
  font: inherit;
}

:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.6);
}

/* SECTION: Layout Helpers */
.container {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding-inline: var(--layout-page-x);
}

.section {
  padding: 64px 0;
}

.section-alt {
  background: radial-gradient(circle at top right, #0f172a 0, #020617 55%);
}

.section-header {
  text-align: center;
  margin-bottom: 32px;
}

.section-header.align-left {
  text-align: left;
}

.section-header h2 {
  font-size: var(--text-3xl);
  letter-spacing: -0.03em;
  margin: 8px 0 8px;
}

.section-subtitle {
  max-width: 520px;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

/* SECTION: Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(3, 7, 18, 0.92), rgba(3, 7, 18, 0.75));
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: var(--text-xs);
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-sm);
  background: conic-gradient(from 140deg, #0ea5e9, #6366f1, #14b8a6, #0ea5e9);
  color: #0b1120;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.4), 0 10px 30px rgba(15, 23, 42, 0.9);
}

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

.site-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: 6px 4px;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #22d3ee, #6366f1);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.nav-list a:hover,
.nav-list a.is-active {
  color: var(--color-text);
}

.nav-list a:hover::after,
.nav-list a.is-active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  border: none;
  background: transparent;
  padding: 8px;
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 999px;
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 5px;
}

/* SECTION: Hero */
.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 48px;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(2.3rem, 4vw, 2.9rem);
  letter-spacing: -0.05em;
  margin: 8px 0 16px;
}

.hero-subtitle {
  max-width: 520px;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 24px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 8px 0 0;
  padding: 0;
}

.hero-stats .stat-item {
  min-width: 120px;
}

.hero-stats dt {
  font-weight: 600;
  font-size: var(--text-xl);
}

.hero-stats dd {
  margin: 4px 0 0;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
}

.hero-visual {
  position: relative;
  min-height: 260px;
}

.hero-card {
  position: relative;
  z-index: 1;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.15) 0, rgba(15, 23, 42, 0.98) 50%);
  border-radius: 24px;
  padding: 24px 24px 20px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  box-shadow: var(--shadow-strong);
  overflow: hidden;
}

.hero-card .hero-tag {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-muted);
  margin: 12px 0 16px;
}

.hero-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.hero-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding-top: 14px;
  margin-top: 4px;
}

.hero-meta .meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.hero-meta .meta-value {
  font-size: var(--text-sm);
}

/* Visual Effects from visual-effects skill */
.gradient-mesh {
  background:
    radial-gradient(at 40% 0%, rgba(56, 189, 248, 0.28) 0, transparent 55%),
    radial-gradient(at 80% 0%, rgba(129, 140, 248, 0.28) 0, transparent 55%),
    radial-gradient(at 0% 60%, rgba(45, 212, 191, 0.24) 0, transparent 55%),
    radial-gradient(at 80% 60%, rgba(56, 189, 248, 0.24) 0, transparent 55%);
}

.grain::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.055;
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.shadow-soft {
  box-shadow: var(--shadow-soft);
}

.shadow-dramatic {
  box-shadow: var(--shadow-strong);
}

.floating-shape {
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 20%, rgba(56, 189, 248, 0.8), rgba(56, 189, 248, 0));
  opacity: 0.38;
  filter: blur(32px);
  animation: float 9s ease-in-out infinite;
}

.floating-shape-1 {
  top: -40px;
  right: -40px;
}

.floating-shape-2 {
  bottom: -60px;
  left: -40px;
  animation-duration: 13s;
}

@keyframes float {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(0, -14px, 0);
  }
}

.accent-line {
  width: 64px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, #22d3ee, #a855f7, transparent);
}

/* SECTION: Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  padding: 9px 18px;
  font-size: var(--text-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-med),
    color var(--transition-fast),
    border-color var(--transition-med),
    transform var(--transition-fast),
    box-shadow var(--transition-med);
  min-height: 40px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-strong), #6366f1);
  border-color: rgba(125, 211, 252, 0.8);
  color: #0b1120;
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.5);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.75);
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(148, 163, 184, 0.4);
  color: var(--color-text);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.95);
}

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

/* SECTION: Pills & Tags */
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.5);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

.pill-soft {
  background: rgba(15, 23, 42, 0.85);
  border-color: rgba(148, 163, 184, 0.4);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}

.project-tags li {
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* SECTION: Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.project-card {
  position: relative;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 18px 18px 16px;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-med), border-color var(--transition-fast);
}

.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%);
  opacity: 0;
  transition: opacity var(--transition-med);
  pointer-events: none;
}

.project-card:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.95);
  border-color: rgba(56, 189, 248, 0.65);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card h3 {
  font-size: var(--text-lg);
  margin: 10px 0 6px;
}

.project-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: var(--text-sm);
  color: var(--color-accent-strong);
  text-decoration: none;
}

.project-link::after {
  content: "→";
  font-size: 0.9em;
  transform: translateX(0);
  transition: transform var(--transition-fast);
}

.project-link:hover::after {
  transform: translateX(3px);
}

/* SECTION: About */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 32px;
  align-items: flex-start;
}

.about-grid p {
  color: var(--color-text-muted);
}

.about-grid p + p {
  margin-top: 12px;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.highlight-card {
  background: rgba(15, 23, 42, 0.9);
  border-radius: 18px;
  padding: 18px 18px 16px;
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.highlight-card h3 {
  font-size: var(--text-base);
  margin: 0 0 8px;
}

.highlight-card ul {
  margin: 0;
  padding-left: 18px;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* SECTION: Skills */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.skills-column h3 {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
  margin-top: 0;
}

.skills-column ul {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.skills-column li {
  font-size: var(--text-sm);
  padding: 4px 0;
}

/* SECTION: Contact */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.8fr);
  gap: 32px;
  align-items: flex-start;
}

.contact-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
  font-size: var(--text-sm);
}

.contact-meta a {
  color: var(--color-accent);
}

.contact-form {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  padding: 18px 18px 16px;
  box-shadow: var(--shadow-soft);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-field label {
  font-size: var(--text-sm);
}

.form-field input,
.form-field textarea {
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: rgba(15, 23, 42, 0.95);
  color: var(--color-text);
  padding: 8px 10px;
  font-size: var(--text-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(148, 163, 184, 0.7);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.5);
  background: rgba(15, 23, 42, 1);
}

.form-helper {
  margin-top: 8px;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* SECTION: Footer */
.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.25);
  padding: 18px 0 24px;
  background: #020617;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer-note {
  opacity: 0.85;
}

/* SECTION: Utilities */
.hidden {
  display: none !important;
}

/* SECTION: Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .about-grid,
  .skills-grid,
  .contact-grid,
  .projects-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-grid {
    gap: 36px;
  }

  .skills-grid {
    gap: 12px;
  }

  .projects-grid {
    gap: 18px;
  }

  .hero-visual {
    order: -1;
  }
}

@media (max-width: 720px) {
  .container {
    padding-inline: 20px;
  }

  .section {
    padding: 52px 0;
  }

  .site-header {
    backdrop-filter: blur(14px);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    position: absolute;
    right: 20px;
    top: calc(var(--nav-height) - 8px);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 10px 10px 10px;
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 18px 35px rgba(15, 23, 42, 0.85);
    transform-origin: top right;
    transform: scale(0.9);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med), transform var(--transition-med);
  }

  .nav-list.nav-open {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
  }

  .nav-list a {
    padding: 6px 4px;
  }

  .hero-stats {
    gap: 14px;
  }

  .hero-stats .stat-item {
    min-width: 110px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 56px;
  }

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

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .projects-grid,
  .skills-grid,
  .about-highlights {
    gap: 14px;
  }
}

/* SECTION: Motion */
@media (prefers-reduced-motion: reduce) {
  .floating-shape {
    animation: none;
  }

  .btn,
  .project-card,
  .nav-list a::after,
  .project-link::after {
    transition: none;
  }
}