/* ============================================================
   MARIA SILVA — PORTFOLIO
   Premium minimalist stylesheet
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Palette — sophisticated neutral */
  --color-bg: #faf9f7;
  --color-bg-alt: #f1efec;
  --color-surface: #ffffff;
  --color-text: #1c1c1c;
  --color-text-soft: #55524e;
  --color-text-muted: #8a867f;
  --color-accent: #8a6d3b;
  --color-accent-dark: #6f5730;
  --color-border: #e4e1dc;
  --color-border-strong: #d3cfc8;

  /* Typography */
  --font-serif: "Georgia", "Times New Roman", serif;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  /* Layout */
  --container-max: 1120px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Motion */
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(28, 28, 28, 0.04);
  --shadow-md: 0 4px 16px rgba(28, 28, 28, 0.06);
  --shadow-lg: 0 12px 40px rgba(28, 28, 28, 0.08);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

/* ---------- Accessibility ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  padding: 0.75rem 1.5rem;
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  max-width: 640px;
}

.section-intro {
  color: var(--color-text-soft);
  max-width: 560px;
  margin-bottom: var(--space-lg);
}

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-med), box-shadow var(--transition-med);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text);
}

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

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  border-radius: 8px;
  transition: background var(--transition-fast);
}

.brand:hover .brand-mark {
  background: var(--color-accent);
}

.brand-name {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-list a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-soft);
  position: relative;
  padding: 0.25rem 0;
}

.nav-list a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-med);
}

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

.nav-list a:hover::after {
  width: 100%;
}

.nav-list .nav-cta {
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 0.5rem 1.25rem;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav-list .nav-cta::after {
  display: none;
}

.nav-list .nav-cta:hover {
  border-color: var(--color-accent);
  background: rgba(138, 109, 59, 0.06);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-med), opacity var(--transition-med);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(138, 109, 59, 0.05), transparent),
    var(--color-bg);
}

.hero-inner {
  max-width: 720px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 500;
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.hero-intro {
  font-size: 1.1rem;
  color: var(--color-text-soft);
  max-width: 520px;
  margin-bottom: var(--space-lg);
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-med);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

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

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.about-text p {
  color: var(--color-text-soft);
  margin-bottom: var(--space-sm);
  font-size: 1.05rem;
}

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

.about-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.about-facts {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}

.facts-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.facts-list li:last-child {
  border-bottom: none;
}

.fact-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.fact-value {
  font-weight: 500;
  color: var(--color-text);
  text-align: right;
}

/* ---------- Areas of Focus ---------- */
.focus {
  background: var(--color-bg-alt);
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.focus-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
}

.focus-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.focus-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(138, 109, 59, 0.08);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.focus-icon svg {
  width: 24px;
  height: 24px;
}

.focus-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  margin-bottom: var(--space-sm);
}

.focus-list li {
  position: relative;
  padding: 0.35rem 0 0.35rem 1.25rem;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.focus-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.5;
}

/* ---------- Projects ---------- */
.projects {
  background: var(--color-bg);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.project-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-med), box-shadow var(--transition-med);
}

.project-card-link:hover {
  color: inherit;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.project-card-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-med);
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-med);
}

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

.project-card-link:hover .project-card {
  border-color: var(--color-border-strong);
}

.project-number {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 400;
  margin-bottom: var(--space-sm);
}

.project-desc {
  color: var(--color-text-soft);
  font-size: 0.95rem;
  margin-bottom: var(--space-md);
}

.project-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  margin-bottom: var(--space-sm);
}

.status-completed {
  color: var(--color-accent-dark);
  background: rgba(138, 109, 59, 0.08);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.6;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.8; }
}

.project-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
  padding-top: var(--space-sm);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.project-card-link:hover .project-cta {
  gap: 0.7rem;
  color: var(--color-accent-dark);
}

/* ---------- Skills ---------- */
.skills {
  background: var(--color-bg-alt);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.skill-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: border-color var(--transition-med), box-shadow var(--transition-med);
}

.skill-group:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.skill-group-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.skill-list li {
  padding: 0.3rem 0;
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

/* ---------- Experience ---------- */
.experience {
  background: var(--color-bg);
}

.experience-list {
  max-width: 760px;
}

.experience-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.experience-item:first-child {
  padding-top: 0;
}

.experience-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.experience-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: 0.5rem;
}

.experience-role {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 400;
}

.experience-period {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  white-space: nowrap;
}

.experience-desc {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

/* ---------- Languages ---------- */
.languages {
  background: var(--color-bg-alt);
}

.languages-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  max-width: 760px;
}

.language-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  transition: border-color var(--transition-med), transform var(--transition-med);
}

.language-item:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.language-name {
  font-weight: 500;
  color: var(--color-text);
}

.language-level {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-accent);
  background: rgba(138, 109, 59, 0.08);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

/* ---------- Contact ---------- */
.contact {
  background: var(--color-bg);
}

.contact-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  max-width: 560px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.contact-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.contact-location {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
}

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

.contact-email a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-strong);
  padding-bottom: 2px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.contact-email a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-email {
  width: 100%;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-text);
  color: rgba(250, 249, 247, 0.7);
  padding: var(--space-md) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.footer-note {
  font-size: 0.85rem;
}

.footer-copy {
  font-size: 0.85rem;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Respect reduced motion preferences */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 900px) {
  .focus-grid {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* Mobile */
@media (max-width: 700px) {
  :root {
    --space-xl: 4rem;
    --space-lg: 3rem;
  }

  .nav-toggle {
    display: flex;
  }

  .primary-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 1.5rem var(--space-md);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-med), opacity var(--transition-med), visibility var(--transition-med);
  }

  .primary-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    display: block;
    padding: 0.75rem 0;
    font-size: 1.05rem;
  }

  .nav-list .nav-cta {
    display: inline-block;
    margin-top: 0.5rem;
    border: none;
    padding: 0.75rem 0;
    color: var(--color-accent);
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

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

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

  .languages-list {
    grid-template-columns: 1fr;
  }

  .experience-meta {
    flex-direction: column;
    gap: 0.25rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }
}

/* Small mobile */
@media (max-width: 400px) {
  .container {
    padding: 0 1.25rem;
  }

  .contact-card {
    padding: var(--space-md);
  }
}