/* ============================================================
   FILIPA PAES DE FARIA — Global Design System
   Vanilla CSS, no frameworks
   ============================================================ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Jost:wght@300;400;500&display=swap');

/* ── Design Tokens ── */
:root {
  /* Colours */
  --color-bg:           #ffffff;
  --color-surface:      #f9f8fb;
  --color-primary:      #c0bdd3;
  --color-primary-dark: #8c88a8;
  --color-primary-light:#e8e6ef;
  --color-text:         #2a2a2a;
  --color-text-muted:   #6e6e7a;
  --color-border:       #e8e6ef;
  --color-sold:         #b0a8c0;
  --color-white:        #ffffff;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Jost', system-ui, sans-serif;

  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-md:   1.125rem;  /* 18px */
  --text-lg:   1.375rem;  /* 22px */
  --text-xl:   1.75rem;   /* 28px */
  --text-2xl:  2.25rem;   /* 36px */
  --text-3xl:  3rem;      /* 48px */

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width:      1280px;
  --nav-height:     64px;
  --border-radius:  2px;
  --border-radius-lg: 4px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 300;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ── Focus styles (WCAG) ── */
:focus-visible {
  outline: 2px solid var(--color-primary-dark);
  outline-offset: 3px;
  border-radius: var(--border-radius);
}

/* ── Skip link (WCAG) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-text);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  z-index: 9999;
  transition: top var(--transition-fast);
  border-radius: var(--border-radius);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

main {
  flex: 1;
  padding-top: var(--nav-height);
}

/* ── Navigation ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  display: flex;
  align-items: center;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 28px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-text);
}

.nav-links a[aria-current="page"] {
  border-bottom: 1px solid var(--color-primary-dark);
  padding-bottom: 2px;
}

.nav-instagram {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: var(--border-radius);
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-white);
  border: 1px solid var(--color-text);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary-dark);
  color: var(--color-primary-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Page header ── */
.page-header {
  padding: var(--space-16) 0 var(--space-10);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--space-3);
}

.page-header p {
  color: var(--color-text-muted);
  font-size: var(--text-md);
  max-width: 700px;
  margin-inline: auto;
}

/* ── Footer ── */
.site-footer {
  margin-top: var(--space-24);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-logo img {
  height: 24px;
  width: auto;
  opacity: 0.7;
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* ── Utilities ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-12) 0;
}

/* ── Responsive: Mobile nav ── */
@media (max-width: 768px) {
  .container {
    padding-inline: var(--space-4);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6) var(--space-6) var(--space-8);
    gap: var(--space-6);
    box-shadow: var(--shadow-md);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    font-size: var(--text-sm);
  }

  h1 { font-size: var(--text-2xl); }
  h2 { font-size: var(--text-xl); }

  .page-header {
    padding: var(--space-10) 0 var(--space-8);
  }

  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}