/* ============================================================
   Ariadne Pinheiro — Portfólio
   Design tokens + componentes
   ============================================================ */

@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@500,700,800&f[]=satoshi@400,500,700&display=swap');

:root {
  /* ---- Type scale (fluid) ---- */
  --text-xs: clamp(0.75rem, 0.72rem + 0.1vw, 0.8rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.15vw, 0.95rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.35rem);
  --text-xl: clamp(1.35rem, 1.2rem + 0.6vw, 1.75rem);
  --text-2xl: clamp(1.75rem, 1.5rem + 1vw, 2.5rem);
  --text-3xl: clamp(2.25rem, 1.8rem + 1.8vw, 3.5rem);
  --text-hero: clamp(2.75rem, 2rem + 3vw, 4.75rem);

  /* ---- Spacing (4px base) ---- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 5rem;
  --space-11: 6.5rem;
  --space-12: 8.5rem;

  --font-display: 'Cabinet Grotesk', 'General Sans', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --max-width: 1180px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  /* ---- Light mode (default) ---- */
  --color-bg: #F8F6F2;
  --color-surface: #FFFFFF;
  --color-surface-2: #F1EDE5;
  --color-border: #E2DCD1;
  --color-text: #17140F;
  --color-text-muted: #6E655A;
  --color-text-faint: #A79C89;
  --color-primary: #C2410C;
  --color-primary-hover: #9A3412;
  --color-primary-highlight: #FBE4D0;
  --color-on-primary: #FBF7F0;
  --color-error: #A12C2C;

  color-scheme: light;
}

[data-theme="dark"] {
  --color-bg: #100E0B;
  --color-surface: #17140F;
  --color-surface-2: #1E1A13;
  --color-border: #302A1E;
  --color-text: #F3EEE4;
  --color-text-muted: #A79C89;
  --color-text-faint: #6E655A;
  --color-primary: #FB923C;
  --color-primary-hover: #FDBA74;
  --color-primary-highlight: #3A2412;
  --color-on-primary: #17140F;
  --color-error: #E2938A;

  color-scheme: dark;
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
  overflow-x: hidden;
}

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

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

button { font-family: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-5); }
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.section-label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  letter-spacing: -0.01em;
}

.section-sub {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 46ch;
  margin-top: var(--space-3);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  background: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-2) var(--space-4);
  z-index: 200;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
}
.brand-mark { color: var(--color-primary); flex-shrink: 0; }
.brand-mark svg { width: 30px; height: 30px; display: block; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}
.main-nav ul {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}
.main-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding: var(--space-1) 0;
  transition: color 0.2s var(--ease);
}
.main-nav a:hover, .main-nav a:focus-visible { color: var(--color-text); }
.main-nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.25s var(--ease);
}
.main-nav a:hover::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.theme-toggle:hover { border-color: var(--color-primary); transform: rotate(15deg); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
}
.nav-toggle svg { width: 18px; height: 18px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  box-shadow: 0 1px 0 0 color-mix(in srgb, var(--color-primary) 60%, black 20%) inset;
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-2px); }
.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn-sm { padding: 0.6rem 1.1rem; font-size: var(--text-xs); }

/* ---------- Hero ---------- */
.hero {
  padding: calc(76px + var(--space-11)) 0 var(--space-11);
  position: relative;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-9);
  align-items: center;
}
.hero-copy h1 {
  font-size: var(--text-hero);
  margin: var(--space-4) 0 var(--space-5);
}
.hero-copy h1 em {
  font-style: normal;
  color: var(--color-primary);
}
.hero-copy p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 46ch;
  margin-bottom: var(--space-6);
}
.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}
.hero-stats {
  display: flex;
  gap: var(--space-7);
  flex-wrap: wrap;
}
.hero-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
}
.hero-stat span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  aspect-ratio: 4 / 3;
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Section shell ---------- */
section { padding: var(--space-11) 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-6);
  margin-bottom: var(--space-9);
  flex-wrap: wrap;
}

/* ---------- About ---------- */
.about .container {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--space-9);
  align-items: start;
}
.about-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 3 / 4;
  background: var(--color-surface-2);
}
.about-visual img { width: 100%; height: 100%; object-fit: cover; }
.about-body p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  margin-bottom: var(--space-4);
  max-width: 62ch;
}
.about-body p strong { color: var(--color-text); font-weight: 600; }
.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-7);
  padding-top: var(--space-7);
  border-top: 1px solid var(--color-border);
}
.about-fact dt {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-1);
}
.about-fact dd {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
}

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-7) var(--space-8);
}
.skill-group h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.skill-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.skill-tag:hover { border-color: var(--color-primary); color: var(--color-text); }

/* ---------- Services ---------- */
.services-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}
.service-row {
  display: grid;
  grid-template-columns: 90px 1.3fr 1.7fr;
  gap: var(--space-6);
  padding: var(--space-7) 0;
  border-bottom: 1px solid var(--color-border);
  align-items: start;
  transition: background 0.2s var(--ease);
}
.service-row:hover { background: var(--color-surface-2); }
.service-index {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}
.service-row h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.service-row h3 svg { width: 22px; height: 22px; color: var(--color-primary); flex-shrink: 0; }
.service-row p { color: var(--color-text-muted); margin-top: var(--space-2); max-width: 56ch; }

/* ---------- Projects ---------- */
.projects-divider {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-9);
  aspect-ratio: 16 / 6;
  border: 1px solid var(--color-border);
}
.projects-divider img { width: 100%; height: 100%; object-fit: cover; }
.projects-divider-copy {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 0 var(--space-8);
  background: linear-gradient(90deg, color-mix(in srgb, var(--color-bg) 88%, transparent) 0%, transparent 65%);
}
.projects-divider-copy p { max-width: 32ch; font-size: var(--text-lg); font-family: var(--font-display); font-weight: 700; }

.note-confidential {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: calc(-1 * var(--space-6));
  margin-bottom: var(--space-8);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 24px -12px color-mix(in srgb, var(--color-primary) 30%, transparent);
}
.project-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-5);
}
.project-icon svg { width: 22px; height: 22px; }
.project-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.project-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-5);
}
.tag-list { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tag-list span {
  font-size: var(--text-xs);
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-weight: 600;
}

/* ---------- Contact ---------- */
.contact .container {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: var(--space-9);
}
.contact-info p { color: var(--color-text-muted); margin: var(--space-4) 0 var(--space-7); max-width: 40ch; }
.contact-links { display: flex; flex-direction: column; gap: var(--space-4); }
.contact-link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.contact-link:hover { border-color: var(--color-primary); transform: translateX(4px); }
.contact-link-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}
.contact-link-icon svg { width: 18px; height: 18px; }
.contact-link strong { display: block; font-size: var(--text-sm); }
.contact-link span { font-size: var(--text-xs); color: var(--color-text-muted); }

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.form-row { margin-bottom: var(--space-5); }
.form-row label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.form-row input, .form-row textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.form-row textarea { resize: vertical; min-height: 120px; }
.form-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
  display: none;
}
.form-row.has-error input, .form-row.has-error textarea { border-color: var(--color-error); }
.form-row.has-error .form-error { display: block; }
.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
}
.form-status {
  font-size: var(--text-sm);
  margin-top: var(--space-4);
  color: var(--color-primary);
  display: none;
}
.form-status.is-visible { display: block; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) 0 var(--space-6);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: var(--space-3); font-family: var(--font-display); font-weight: 700; }
.footer-brand .brand-mark svg { width: 22px; height: 22px; }
.footer-links { display: flex; gap: var(--space-6); }
.footer-links a { font-size: var(--text-sm); color: var(--color-text-muted); transition: color 0.2s var(--ease); }
.footer-links a:hover { color: var(--color-primary); }
.footer-meta {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- Reveal on scroll ----------
   Content is ALWAYS fully opaque — opacity never hides anything, so the
   page is 100% readable even with JS disabled, on first paint, or when a
   tool screenshots without scrolling. The only below-the-fold polish is a
   small transform-only nudge (never opacity) that settles into place as
   the user scrolls to it. */
.reveal.reveal-armed {
  transform: translateY(14px);
}
.reveal {
  transition: transform 0.5s var(--ease);
}
.reveal.is-visible { transform: translateY(0); }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  z-index: 90;
  box-shadow: 0 8px 20px -8px rgba(0,0,0,0.35);
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top svg { width: 18px; height: 18px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero .container, .about .container, .contact .container {
    grid-template-columns: 1fr;
  }
  .hero-visual { order: -1; max-width: 420px; margin: 0 auto var(--space-4); }
  .about-visual { max-width: 340px; margin: 0 auto; }
  .service-row { grid-template-columns: 1fr; gap: var(--space-2); }
  .service-index { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-facts { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .main-nav ul, .main-nav .nav-cv { display: none; }
  .main-nav.is-open ul {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-5) var(--space-6);
    gap: var(--space-4);
  }
  .main-nav.is-open .nav-cv { display: inline-flex; margin-top: var(--space-2); }
  .nav-toggle { display: flex; }
  .hero-stats { gap: var(--space-5); }
  .projects-divider { aspect-ratio: 4/5; }
  .projects-divider-copy { background: linear-gradient(180deg, transparent 0%, color-mix(in srgb, var(--color-bg) 92%, transparent) 70%); align-items: flex-end; padding-bottom: var(--space-6); }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}