:root {
  --surface: #12151a;
  --surface-elevated: #1a1f27;
  --surface-muted: #222833;
  --ink: #e8ecf1;
  --ink-muted: #9aa3b2;
  --border: #2c3440;
  --accent: #3dd6c6;
  --accent-soft: rgba(61, 214, 198, 0.12);
  --accent-strong: #2bb8a9;
  --danger: #f07178;
  --success: #7fd99a;
  --font-sans: "Manrope", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  min-height: 100%;
  color: var(--ink);
  font-family: var(--font-sans);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(61, 214, 198, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(80, 120, 180, 0.06), transparent),
    var(--surface);
}

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.02em;
  font-weight: 600;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
}

h3 {
  font-size: 1.05rem;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  padding: 0.6rem 1rem;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--surface);
}

.container {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
}

.container.narrow {
  width: min(40rem, calc(100% - 2rem));
}

.section {
  padding: 4rem 0;
  scroll-margin-top: 5rem;
}

@media (min-width: 640px) {
  .section {
    padding: 5rem 0;
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(10px);
  background: rgba(18, 21, 26, 0.72);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.is-compact {
  border-bottom-color: var(--border);
  background: rgba(18, 21, 26, 0.92);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  margin-right: auto;
}

.brand:hover,
.footer-link:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-desktop {
  display: none;
  gap: 1.25rem;
}

.nav-desktop a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

.nav-desktop a:hover {
  color: var(--ink);
}

.header-cta {
  display: none;
}

.nav-toggle {
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: var(--ink);
  border-radius: 0.5rem;
  padding: 0.45rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

.nav-mobile {
  display: grid;
  gap: 0.75rem;
  padding: 0 1rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(18, 21, 26, 0.96);
}

.nav-mobile[hidden] {
  display: none;
}

.nav-mobile a {
  color: var(--ink);
  text-decoration: none;
}

@media (min-width: 900px) {
  .nav-desktop,
  .header-cta {
    display: flex;
  }

  .nav-toggle,
  .nav-mobile {
    display: none !important;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  padding: 0.7rem 1.15rem;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-accent {
  background: var(--accent);
  color: var(--surface);
}

.btn-accent:hover {
  background: var(--accent-strong);
  color: var(--surface);
}

.btn-ghost {
  background: var(--surface-elevated);
  border-color: var(--border);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: rgba(61, 214, 198, 0.4);
  color: var(--accent);
}

.btn-block {
  width: 100%;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.85rem;
}

.hero .eyebrow {
  color: var(--accent);
  letter-spacing: 0.2em;
}

.lead {
  margin-top: 1rem;
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--ink-muted);
}

.muted,
.section-lead,
.prose p,
.form-note,
.brand-muted {
  color: var(--ink-muted);
  line-height: 1.65;
}

.section-lead {
  margin-top: 0.75rem;
  max-width: 40rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.chip-list li {
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  color: var(--ink-muted);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.chip-list li:hover {
  border-color: rgba(61, 214, 198, 0.35);
  color: var(--ink);
  background: var(--accent-soft);
}

.hero-grid,
.about-grid,
.contact-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 3rem;
  }

  .about-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .contact-grid {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

.system-diagram {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  border-radius: 1rem;
  padding: 1rem;
}

@media (min-width: 640px) {
  .system-diagram {
    padding: 1.35rem;
  }
}

.system-diagram-grid {
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.8;
  background-image:
    linear-gradient(rgba(61, 214, 198, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 214, 198, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}

.system-diagram-caption {
  position: relative;
  margin-bottom: 1rem;
}

.system-diagram-svg {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
}

.system-diagram-legend {
  position: relative;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
}

.system-diagram-svg rect {
  transition: stroke 0.2s ease, fill 0.2s ease;
}

.system-diagram-svg g:hover rect {
  stroke: #3dd6c6;
  fill: #2a3340;
}

.form-card,
.card {
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  border-radius: 0.9rem;
  padding: 1.25rem;
}

.form-card {
  overflow: visible;
}

.card-grid,
.project-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

@media (min-width: 720px) {
  .card-grid,
  .project-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.card {
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.card:hover,
.project-card:hover {
  border-color: rgba(61, 214, 198, 0.3);
}

.project-card:hover {
  border-color: rgba(61, 214, 198, 0.25);
}

.card h3 {
  margin-bottom: 0.55rem;
}

.card p {
  color: var(--ink-muted);
  line-height: 1.6;
}

.accent-bar {
  display: block;
  width: 2.5rem;
  height: 0.25rem;
  background: var(--accent);
  border-radius: 999px;
  margin-bottom: 0.9rem;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0;
}

.feature-list li {
  border: 1px solid var(--border);
  background: var(--surface-muted);
  border-radius: 0.4rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
  color: var(--ink);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.project-card:hover .feature-list li {
  border-color: rgba(61, 214, 198, 0.25);
}

.stack {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.other-projects {
  margin-top: 1.5rem;
}

.steps {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.steps > li,
.flow-list li {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}

.steps h3 {
  margin-bottom: 0.35rem;
}

.steps p {
  color: var(--ink-muted);
  line-height: 1.55;
}

.step-num {
  flex: 0 0 auto;
  width: 1.75rem;
  height: 1.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.4rem;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.step-num.small {
  width: 1.6rem;
  height: 1.6rem;
}

.flow-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.prose {
  display: grid;
  gap: 1rem;
  margin-top: 1.25rem;
}

.prose h2 {
  margin-top: 0.5rem;
  color: var(--ink);
  font-size: 1.2rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.92rem;
}

.field-input,
select.field-input,
textarea.field-input {
  width: 100%;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  padding: 0.7rem 0.8rem;
  font: inherit;
}

.field-input:focus,
select.field-input:focus,
textarea.field-input:focus {
  outline: none;
  border-color: rgba(61, 214, 198, 0.5);
  box-shadow: 0 0 0 3px rgba(61, 214, 198, 0.2);
}

.resize-y {
  resize: vertical;
  min-height: 8rem;
}

.field-error,
.alert-danger {
  color: var(--danger);
  font-size: 0.9rem;
}

.field-error {
  margin-top: 0.35rem;
}

.alert {
  margin-bottom: 1rem;
  padding: 0.7rem 0.85rem;
  border-radius: 0.5rem;
  background: rgba(240, 113, 120, 0.12);
}

.hp {
  position: absolute;
  left: -10000px;
  top: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.form-card {
  position: relative;
}

.form-note {
  margin-top: 0.85rem;
  font-size: 0.78rem;
}

.form-note a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.success-title {
  color: var(--success);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(8, 10, 14, 0.72);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: min(24rem, 100%);
  border: 1px solid rgba(61, 214, 198, 0.28);
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(61, 214, 198, 0.12), transparent),
    var(--surface-elevated);
  border-radius: 1rem;
  padding: 1.5rem 1.35rem 1.35rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  transform: translateY(10px) scale(0.98);
  transition: transform 0.2s ease;
}

.modal-overlay.is-open .modal-card {
  transform: none;
}

.modal-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--success);
  margin-bottom: 0.55rem;
}

.modal-card h2 {
  font-size: 1.35rem;
  margin-bottom: 0.55rem;
}

.modal-card .muted {
  margin-bottom: 1.25rem;
}

.modal-close {
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .modal-overlay,
  .modal-card {
    transition: none;
  }
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 2.5rem;
}

.footer-inner {
  display: grid;
  gap: 0.5rem;
}

.footer-link,
.text-accent {
  color: var(--accent);
}

@media (prefers-reduced-motion: reduce) {
  .modal-overlay,
  .modal-card,
  .animate-fade-up,
  .animate-fade-in {
    animation: none !important;
    transition: none !important;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: rgba(61, 214, 198, 0.3);
  color: var(--ink);
}