/* ============================================================
   UX & Coffee — Design Tokens + Component Styles
   Art direction: Warm, refined, espresso-inspired professional site
   ============================================================ */

/* --- Type Scale (fluid clamp) --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --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;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-body: 'Switzer', 'Helvetica Neue', sans-serif;
}

/* --- Color: Slate-Teal Palette --- */
/* Light Mode (default) */
:root, [data-theme="light"] {
  --color-bg:             #F8F9FA;
  --color-surface:        #FFFFFF;
  --color-surface-2:      #F0F2F4;
  --color-surface-offset: #E6E9EC;
  --color-border:         #CDD2D8;
  --color-divider:        #DDE1E5;

  --color-text:           #1A1F25;
  --color-text-muted:     #5A636E;
  --color-text-faint:     #758290;

  --color-primary:        #2E6B6A;
  --color-primary-hover:  #215250;
  --color-primary-active: #1A4240;

  --color-accent:         #3D8C8A;

  --shadow-sm: 0 1px 2px oklch(0.25 0.01 230 / 0.06);
  --shadow-md: 0 4px 12px oklch(0.25 0.01 230 / 0.08);
  --shadow-lg: 0 12px 32px oklch(0.25 0.01 230 / 0.12);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-bg:             #111418;
  --color-surface:        #191D22;
  --color-surface-2:      #1F242A;
  --color-surface-offset: #262C33;
  --color-border:         #333B44;
  --color-divider:        #2A3038;

  --color-text:           #E2E6EA;
  --color-text-muted:     #8D97A3;
  --color-text-faint:     #5C6672;

  --color-primary:        #5BB9B7;
  --color-primary-hover:  #74CCC9;
  --color-primary-active: #4AA5A3;

  --color-accent:         #5BB9B7;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #111418;
    --color-surface:        #191D22;
    --color-surface-2:      #1F242A;
    --color-surface-offset: #262C33;
    --color-border:         #333B44;
    --color-divider:        #2A3038;
    --color-text:           #E2E6EA;
    --color-text-muted:     #8D97A3;
    --color-text-faint:     #5C6672;
    --color-primary:        #5BB9B7;
    --color-primary-hover:  #74CCC9;
    --color-primary-active: #4AA5A3;
    --color-accent:         #5BB9B7;
    --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.2);
    --shadow-md: 0 4px 12px oklch(0 0 0 / 0.3);
    --shadow-lg: 0 12px 32px oklch(0 0 0 / 0.4);
  }
}

/* ============================================================
   COMPONENTS
   ============================================================ */

/* --- Header / Nav --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid oklch(from var(--color-text) l c h / 0.06);
  transition: box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-weight: 500;
}

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

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

/* Mobile nav */
.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

@media (max-width: 767px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6) var(--space-4);
    gap: var(--space-5);
  }
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  z-index: 100;
  text-decoration: none;
  font-size: var(--text-sm);
}
.skip-link:focus {
  top: var(--space-2);
}

/* --- Hero Section --- */
.hero {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-4);
  max-width: var(--content-wide);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: center;
  min-height: 70vh;
}

@media (min-width: 768px) {
  .hero {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-12);
    min-height: 80vh;
  }
}

.hero-content {
  order: 2;
}

@media (min-width: 768px) {
  .hero-content { order: 1; }
  .hero-visual { order: 2; }
}

.hero-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
  font-weight: 400;
  line-height: 1.08;
}

.hero-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 52ch;
  margin-bottom: var(--space-6);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.hero-cta:hover {
  background: var(--color-primary-hover);
}

.hero-cta:active {
  background: var(--color-primary-active);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-graphic {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface-2);
  position: relative;
}

.hero-graphic svg {
  width: 100%;
  height: 100%;
}

.hero-headshot-wrap {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 5px solid var(--color-surface);
  margin: 0 auto;
}

[data-theme="dark"] .hero-headshot-wrap {
  border-color: var(--color-surface-offset);
}

.hero-headshot {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 15%;
  display: block;
}

/* --- Section divider --- */
.section-divider {
  max-width: var(--content-default);
  margin-inline: auto;
  border: none;
  height: 1px;
  background: var(--color-divider);
}

/* --- Section base --- */
.section {
  padding: clamp(var(--space-12), 6vw, var(--space-24)) var(--space-4);
}

.section-inner {
  max-width: var(--content-default);
  margin-inline: auto;
}

.section-wide {
  max-width: var(--content-wide);
  margin-inline: auto;
}

.section-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.01em;
  font-weight: 400;
}

.section-alt {
  background: var(--color-surface-2);
}

/* --- About --- */
.about-icon-row {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-8);
}

.about-coffee-icon {
  width: 80px;
  height: 80px;
  opacity: 0.35;
}

@media (min-width: 768px) {
  .about-coffee-icon {
    width: 96px;
    height: 96px;
  }
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 2fr 1fr;
    gap: var(--space-12);
  }
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.65;
}

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

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.highlight-card {
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .highlight-card {
  background: var(--color-surface-offset);
}

.highlight-card .number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.highlight-card .label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- Experience --- */
.experience-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.experience-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

@media (min-width: 640px) {
  .experience-item {
    grid-template-columns: 180px 1fr;
    gap: var(--space-6);
  }
}

.exp-dates {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding-top: var(--space-1);
}

.exp-body h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.exp-company {
  font-size: var(--text-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.exp-body p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.experience-divider {
  height: 1px;
  background: var(--color-divider);
  border: none;
}

/* --- Expertise pills --- */
.expertise-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.expertise-pill {
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid oklch(from var(--color-text) l c h / 0.1);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}

[data-theme="dark"] .expertise-pill {
  background: var(--color-surface-offset);
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-12);
  }
}

.contact-info p {
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
}

.contact-link:hover {
  color: var(--color-primary-hover);
}

.contact-link svg {
  width: 18px;
  height: 18px;
  display: inline;
  flex-shrink: 0;
}

/* --- Form --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-group label {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.12);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-faint);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 480px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.btn-submit {
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  align-self: flex-start;
}

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

.btn-submit:active {
  background: var(--color-primary-active);
}

.form-success {
  display: none;
  padding: var(--space-4);
  background: oklch(from var(--color-primary) l c h / 0.08);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: var(--text-sm);
  text-align: center;
}

.form-success.visible {
  display: block;
}

/* --- Footer --- */
.footer {
  padding: var(--space-8) var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-text a {
  color: var(--color-text-faint);
  text-decoration: none;
}

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

/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

/* --- ADA: Focus-visible outlines --- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Honeypot (hidden from humans) --- */
.hp-field {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

/* --- Form validation error states --- */
.field-error {
  border-color: #C53030 !important;
  box-shadow: 0 0 0 3px rgba(197, 48, 48, 0.12) !important;
}

.field-error-msg {
  color: #C53030;
  font-size: var(--text-xs);
  margin-top: var(--space-1);
}

[data-theme="dark"] .field-error {
  border-color: #FC8181 !important;
  box-shadow: 0 0 0 3px rgba(252, 129, 129, 0.15) !important;
}

[data-theme="dark"] .field-error-msg {
  color: #FC8181;
}

/* --- Credentials sub-headings (Education, Certifications, Memberships) --- */
.credentials-subhead {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-top: var(--space-10);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

.credentials-subhead:first-of-type {
  margin-top: var(--space-2);
}

/* --- ADA: form-success focus for screen readers --- */
.form-success:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.form-success.visible {
  display: block;
}