/* ==========================================================================
   Pandora Consulting — Design System
   Concept: a "dossier" — dark cover sections bookend paper-toned pages,
   with a file-tab / index-card motif carried through as the signature
   device (grounded in Brief Buddy's document indexing + Role Schemas'
   mapping work).
   ========================================================================== */

:root {
  /* Color */
  --ink-900: #12151c;
  --ink-700: #262b36;
  --paper: #f3f3ee;
  --paper-dim: #e8e7de;
  --white: #ffffff;
  --brass: #b8863e;
  --brass-dark: #96692c;
  --brass-soft: #ecdfc2;
  --teal: #3e6b63;
  --teal-soft: #d9e3e0;
  --text-soft: #52565f;
  --line: #d8d6ca;
  --line-on-dark: rgba(243, 243, 238, 0.16);
  --paper-soft-on-dark: rgba(243, 243, 238, 0.7);

  /* Type */
  --font-display: "Spectral", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout */
  --container: 1160px;
  --radius: 4px;
  --radius-lg: 7px;

  /* Space */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;
  --space-8: 8.5rem;
}

/* ============================== Reset ============================== */

*, *::before, *::after { 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;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; background: none; border: none; cursor: pointer; }
input, textarea { font: inherit; }

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

/* ============================== Type ============================== */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

h1 { font-size: clamp(2.5rem, 4.5vw + 1rem, 4.1rem); }
h2 { font-size: clamp(1.8rem, 2.2vw + 1rem, 2.5rem); }
h3 { font-size: 1.3rem; }
h4 { font-size: 1.05rem; }

p { margin: 0; }

.lede {
  font-size: clamp(1.05rem, 0.6vw + 0.9rem, 1.25rem);
  color: var(--text-soft);
  max-width: 42em;
}

.cover .lede { color: var(--paper-soft-on-dark); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
}

.cover .eyebrow { color: var(--brass); }

.eyebrow__tab {
  width: 0.85em;
  height: 0.85em;
  background: var(--brass);
  border-radius: 1.5px;
  flex: none;
}

.eyebrow--teal { color: var(--teal); }
.eyebrow--teal .eyebrow__tab { background: var(--teal); }

/* ============================== Layout ============================== */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.section { padding: var(--space-7) 0; }
.section--tight { padding: var(--space-6) 0; }

.cover { background: var(--ink-900); color: var(--paper); position: relative; }
.cover-texture {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(243, 243, 238, 0.09) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.section--paper { background: var(--paper); }
.section--dim { background: var(--paper-dim); }

.section-head { max-width: 40em; margin-bottom: var(--space-5); }
.section-head h2 { margin-top: var(--space-2); }

.rule {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}
.cover .rule { border-top-color: var(--line-on-dark); }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--brass);
  color: var(--ink-900);
  padding: 0.75rem 1.25rem;
  z-index: 200;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skip-link:focus { left: var(--space-2); top: var(--space-2); }

/* ============================== Buttons ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.85rem 1.6rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }

.btn--primary { background: var(--brass); color: var(--ink-900); }
.btn--primary:hover { background: var(--brass-dark); }

.btn--ghost { border-color: var(--ink-900); color: var(--ink-900); }
.btn--ghost:hover { border-color: var(--brass); color: var(--brass-dark); }

.btn--ghost-on-dark { border-color: var(--line-on-dark); color: var(--paper); }
.btn--ghost-on-dark:hover { border-color: var(--brass); color: var(--brass); }

.btn--block { width: 100%; justify-content: center; }

/* ============================== Nav ============================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line-on-dark);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 0;
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--paper);
}

.nav__mark { width: 30px; height: 26px; flex: none; }

.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__link {
  font-size: 0.92rem;
  color: var(--paper-soft-on-dark);
  padding: 0.4rem 0.1rem;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.nav__link:hover { color: var(--paper); }
.nav__link.is-active { color: var(--brass); border-bottom-color: var(--brass); }

.nav__cta { margin-left: var(--space-2); }

.nav__toggle {
  display: none;
  width: 36px;
  height: 36px;
  color: var(--paper);
  align-items: center;
  justify-content: center;
}

.nav__toggle-icon, .nav__toggle-icon::before, .nav__toggle-icon::after {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav__toggle-icon::before, .nav__toggle-icon::after { content: ""; position: absolute; left: 0; }
.nav__toggle-icon::before { top: -6px; }
.nav__toggle-icon::after { top: 6px; }

.site-header.is-open .nav__toggle-icon { background: transparent; }
.site-header.is-open .nav__toggle-icon::before { transform: translateY(6px) rotate(45deg); }
.site-header.is-open .nav__toggle-icon::after { transform: translateY(-6px) rotate(-45deg); }

/* ============================== Hero (home) ============================== */

.hero { padding: var(--space-8) 0 var(--space-7); }
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
  position: relative;
}

.hero__title { margin-top: var(--space-3); }
.hero__title em {
  font-style: italic;
  color: var(--brass);
}
.hero__lede { margin-top: var(--space-3); }
.hero__actions { display: flex; gap: var(--space-2); margin-top: var(--space-5); flex-wrap: wrap; }

.hero__art { position: relative; }

.hero__inner > * {
  animation: fadeUp 0.7s ease both;
}
.hero__inner > *:nth-child(2) { animation-delay: 0.08s; }
.hero__inner > *:nth-child(3) { animation-delay: 0.16s; }
.hero__inner > *:nth-child(4) { animation-delay: 0.24s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================== Page header (subpages) ============================== */

.page-header { padding: var(--space-6) 0 var(--space-6); position: relative; }
.page-header__title { margin-top: var(--space-2); }
.page-header__lede { margin-top: var(--space-3); }
.page-header__actions { margin-top: var(--space-4); display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ============================== Principles ============================== */

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.principle { border-top: 1px solid var(--line); padding-top: var(--space-2); }
.principle__file { font-family: var(--font-mono); font-size: 0.72rem; color: var(--brass); letter-spacing: 0.1em; }
.principle h3 { margin-top: 0.6rem; }
.principle p { margin-top: 0.5rem; color: var(--text-soft); }

/* ============================== Product / Feature cards ============================== */

.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  position: relative;
  overflow: visible;
}

.card__tab {
  position: absolute;
  top: -0.55rem;
  left: var(--space-4);
  width: 2.75rem;
  height: 0.55rem;
  border-radius: 2px 2px 0 0;
  background: var(--brass);
}
.card--teal .card__tab { background: var(--teal); }

.card__file-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-soft);
}

.card__icon { width: 34px; height: 34px; color: var(--brass); margin: var(--space-2) 0 var(--space-1); }
.card--teal .card__icon { color: var(--teal); }

.card h3 { margin-top: 0.4rem; }
.card p { margin-top: 0.6rem; color: var(--text-soft); }

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  margin-top: var(--space-3);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--brass-dark);
}
.card--teal .card__link { color: var(--teal); }
.card__link svg { width: 14px; height: 14px; transition: transform 0.15s ease; }
.card__link:hover svg { transform: translateX(3px); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}
.feature-card__icon { width: 28px; height: 28px; color: var(--brass); }
.role-schemas-theme .feature-card__icon { color: var(--teal); }
.feature-card h3 { margin-top: var(--space-2); font-size: 1.05rem; }
.feature-card p { margin-top: 0.5rem; color: var(--text-soft); font-size: 0.95rem; }

/* ============================== Steps ============================== */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.step__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--brass);
  letter-spacing: 0.08em;
  display: block;
  border-bottom: 1px solid var(--line);
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-2);
}
.role-schemas-theme .step__no { color: var(--teal); }
.step h3 { font-size: 1.1rem; }
.step p { margin-top: 0.5rem; color: var(--text-soft); }

/* ============================== About ============================== */

.about-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-6);
}

.avatar-placeholder {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  border: 1.5px dashed var(--line);
  background: var(--paper-dim);
  color: var(--text-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}
.avatar-placeholder svg { width: 64px; height: 64px; }

.about-identity { position: sticky; top: 6.5rem; align-self: start; }
.about-identity h2 { margin-top: var(--space-3); font-size: clamp(1.7rem, 2.6vw, 2.2rem); }
.about-identity .role { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-soft); margin-top: 0.35rem; display: block; }

.about-block + .about-block { margin-top: var(--space-5); }
.about-block__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  display: block;
  margin-bottom: var(--space-2);
}

.placeholder-text {
  font-style: italic;
  color: var(--text-soft);
  border-left: 2px dashed var(--line);
  padding-left: var(--space-2);
}

.about-teaser {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-4);
  align-items: center;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-top: var(--space-5);
}
.about-teaser .avatar-placeholder { width: 88px; height: 88px; }
.about-teaser .avatar-placeholder svg { width: 34px; height: 34px; }
.about-teaser p { color: var(--text-soft); }

/* ============================== CTA band ============================== */

.cta-band { padding: var(--space-6) 0; }
.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.6rem, 2vw + 1rem, 2.1rem); }

/* ============================== Footer / Contact ============================== */

.site-footer { padding: var(--space-7) 0 var(--space-4); }

.footer-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--space-6);
}

.footer-info h2 { margin-top: var(--space-2); }
.footer-info .lede { margin-top: var(--space-2); }

.footer-contact-list { margin-top: var(--space-4); display: flex; flex-direction: column; gap: 0.7rem; }
.footer-contact-list a, .footer-contact-list span { color: var(--paper); font-size: 0.98rem; }
.footer-contact-list .label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-soft-on-dark);
  display: block;
  margin-bottom: 0.15rem;
}

.footer-social { display: flex; gap: var(--space-2); margin-top: var(--space-4); }
.footer-social a {
  font-size: 0.85rem;
  color: var(--paper-soft-on-dark);
  border-bottom: 1px solid var(--line-on-dark);
  padding-bottom: 2px;
}
.footer-social a:hover { color: var(--brass); border-color: var(--brass); }

.form-field { display: flex; flex-direction: column; gap: 0.45rem; margin-bottom: var(--space-3); }
.form-field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-soft-on-dark);
}
.form-field input, .form-field textarea {
  background: rgba(243, 243, 238, 0.06);
  border: 1px solid var(--line-on-dark);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  color: var(--paper);
}
.form-field input::placeholder, .form-field textarea::placeholder { color: rgba(243, 243, 238, 0.35); }
.form-field textarea { resize: vertical; min-height: 110px; }

.form-note { font-size: 0.82rem; color: var(--paper-soft-on-dark); margin-top: var(--space-2); }
.form-success {
  display: none;
  border: 1px solid var(--brass);
  border-radius: var(--radius);
  padding: var(--space-3);
  font-size: 0.92rem;
  color: var(--paper);
}
.form-success.is-visible { display: block; }
.contact-form.is-hidden { display: none; }

.footer-bottom {
  margin-top: var(--space-7);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line-on-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.footer-bottom__logo { display: inline-flex; align-items: center; gap: 0.5rem; }
.footer-bottom__logo .nav__mark { width: 22px; height: 19px; }
.footer-bottom__logo span { font-family: var(--font-mono); font-size: 0.82rem; color: var(--paper-soft-on-dark); }
.footer-bottom__copy { font-size: 0.8rem; color: var(--paper-soft-on-dark); font-family: var(--font-mono); }

/* ============================== Responsive ============================== */

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { order: -1; max-width: 320px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; }
  .about-identity { position: static; }
  .footer-grid { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; gap: var(--space-3); }
  .steps { grid-template-columns: 1fr; gap: var(--space-3); }
}

@media (max-width: 760px) {
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink-900);
    border-bottom: 1px solid var(--line-on-dark);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-2) 0;
  }
  .site-header.is-open .nav__links { display: flex; }
  .nav__link { width: 100%; padding: 0.9rem clamp(1.25rem, 4vw, 3rem); border-bottom: 1px solid var(--line-on-dark); }
  .nav__cta { margin: 0.9rem clamp(1.25rem, 4vw, 3rem) 0.4rem; }
  .nav__toggle { display: inline-flex; }
  .products-grid { grid-template-columns: 1fr; }
  .about-teaser { grid-template-columns: 1fr; text-align: left; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .section { padding: var(--space-6) 0; }
  .hero { padding: var(--space-6) 0 var(--space-5); }
}