/* ── Tokens ── */
:root {
  --color-base: #ffffff;
  --color-surface: #f5f5f4;
  --color-text: #1c1917;
  --color-muted: #78716c;
  --color-accent: #0f766e;
  --color-accent-hover: #0d9488;
  --color-border: #e7e5e4;
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --max-width: 1080px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --radius: 6px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-base);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color-accent-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

section {
  padding: var(--space-xl) 0;
}

h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

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

.nav-cta {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s;
}

.nav-cta:hover {
  background: var(--color-accent);
  color: var(--color-base);
}

/* ── Hero ── */
.hero {
  padding: var(--space-xl) 0 var(--space-lg);
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 700;
  max-width: 14ch;
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 50ch;
  margin-bottom: var(--space-md);
}

/* ── Button ── */
.btn {
  display: inline-block;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-base);
  background: var(--color-accent);
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
}

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

/* ── Services ── */
.services {
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }
}

.service p {
  color: var(--color-muted);
  font-size: 1rem;
}

/* ── Portfolio ── */
.project {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: start;
}

@media (min-width: 768px) {
  .project {
    grid-template-columns: 3fr 2fr;
  }
}

.project-image {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.browser-frame {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.6rem var(--space-sm);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.browser-dots {
  display: flex;
  gap: 5px;
}

.browser-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
}

.browser-bar {
  font-size: 0.75rem;
  color: var(--color-muted);
  background: var(--color-base);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  flex: 1;
}

.project-screenshot {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-surface);
  display: flex;
  align-items: flex-start;
}

.project-screenshot img {
  width: 100%;
  object-fit: cover;
  object-position: top;
}

.project-type {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.project-info h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.project-info p {
  margin-bottom: var(--space-sm);
}

.project-link {
  font-weight: 500;
}

/* ── About ── */
.about {
  background: var(--color-surface);
}

.about p {
  max-width: 60ch;
  margin-bottom: var(--space-sm);
  color: var(--color-muted);
}

.about p:last-child {
  margin-bottom: 0;
}

/* ── Contact ── */
.contact-intro {
  color: var(--color-muted);
  margin-top: calc(-1 * var(--space-md));
  margin-bottom: var(--space-lg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 3fr 2fr;
  }
}

.form-field {
  margin-bottom: var(--space-sm);
}

.form-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 1rem;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-base);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--color-accent);
  outline: none;
}

.form-field textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form .btn {
  margin-top: var(--space-xs);
}

.contact-details {
  padding-top: var(--space-xs);
}

.contact-item {
  margin-bottom: var(--space-md);
}

.contact-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: 0.125rem;
}

.contact-item a {
  font-size: 1rem;
  font-weight: 500;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.site-footer p {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}