/* ==============================================
   ALAN WHITEHEAD -- Personal Website
   Production Stylesheet
   ============================================== */

/* Custom Properties */
:root {
  --navy:          #0A1628;
  --charcoal:      #2D3142;
  --slate:         #4F5D75;
  --copper:        #C9783A;
  --white:         #F4F4F2;
  --text-primary:  #E0E4EC;
  --text-secondary:#9AA3B2;
  --border-subtle: rgba(79, 93, 117, 0.28);

  --font-display:  'Cormorant Garamond', Georgia, serif;
  --font-body:     'Source Sans Pro', Arial, sans-serif;

  --nav-height:    72px;
  --max-width:     1180px;
  --section-pad:   96px 0;
  --card-pad:      44px;
}

/* ==============================================
   RESET AND BASE
   ============================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--navy);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--copper);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.78;
}

/* ==============================================
   TYPOGRAPHY
   ============================================== */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  color: var(--white);
}

h1 { font-size: clamp(3rem, 6vw, 6rem); font-weight: 300; }
h2 { font-size: clamp(1.875rem, 3.5vw, 2.875rem); }
h3 { font-size: clamp(1.375rem, 2.5vw, 2rem); }
h4 { font-size: 1.25rem; font-weight: 600; }

p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

.label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--copper);
}

/* ==============================================
   LAYOUT
   ============================================== */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.section {
  padding: var(--section-pad);
}

.section--charcoal {
  background-color: var(--charcoal);
}

.section-divider {
  width: 44px;
  height: 2px;
  background-color: var(--copper);
  margin: 20px 0 32px;
}

/* Interior page headers */
.page-header {
  padding: 112px 0 64px;
  border-bottom: 1px solid var(--border-subtle);
}

.page-header .label {
  margin-bottom: 20px;
}

.page-header p.intro {
  max-width: 600px;
  font-size: 1.125rem;
  margin-top: 20px;
  color: var(--text-secondary);
}

/* ==============================================
   SCROLL ANIMATIONS
   ============================================== */

.fade-in-section {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==============================================
   NAVIGATION
   ============================================== */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(10, 22, 40, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__monogram {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.04em;
  text-decoration: none;
  flex-shrink: 0;
  transition: color 0.2s ease;
}

.nav__monogram:hover {
  color: var(--copper);
  opacity: 1;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 40px;
  list-style: none;
  flex: 1;
  justify-content: center;
}

.nav__links a {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
  opacity: 1;
}

.nav__cta {
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 13px 30px;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
  text-decoration: none;
  line-height: 1;
}

.btn--copper {
  background-color: var(--copper);
  color: var(--white);
}

.btn--copper:hover {
  background-color: #b46730;
  opacity: 1;
}

.btn--outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(224, 228, 236, 0.28);
}

.btn--outline:hover {
  border-color: var(--text-primary);
  opacity: 1;
}

/* Mobile hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform 0.28s ease, opacity 0.28s ease;
}

.nav__toggle.is-open span:first-child  { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:last-child   { transform: translateY(-7px) rotate(-45deg); }

/* ==============================================
   HERO
   ============================================== */

.hero {
  background-color: var(--navy);
  padding: 128px 0 104px;
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: center;
}

.hero__content {
  max-width: 820px;
}

.hero__label {
  margin-bottom: 28px;
}

.hero__name {
  margin-bottom: 16px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 300;
  font-style: italic;
  color: var(--copper);
  margin-bottom: 32px;
}

.hero__value-prop {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 48px;
}

.hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==============================================
   ACHIEVEMENTS GRID
   ============================================== */

.achievements {
  padding: var(--section-pad);
  background-color: var(--charcoal);
}

.achievements__header {
  margin-bottom: 56px;
}

.achievements__header h2 {
  margin-top: 16px;
}

.achievements__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--border-subtle);
}

.achievement-card {
  background-color: var(--charcoal);
  padding: var(--card-pad);
  border-left: 3px solid transparent;
  transition: border-color 0.3s ease;
}

.achievement-card:hover {
  border-left-color: var(--copper);
}

.achievement-card__number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--copper);
  line-height: 1.1;
  margin-bottom: 12px;
}

.achievement-card__label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.achievement-card__context {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==============================================
   METHODOLOGY
   ============================================== */

.methodology {
  padding: var(--section-pad);
  background-color: var(--navy);
}

.methodology__header {
  margin-bottom: 56px;
}

.methodology__header h2 {
  margin-top: 16px;
}

.methodology__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.methodology__text p {
  font-size: 1.0625rem;
  line-height: 1.85;
  margin-bottom: 0;
}

.methodology__list {
  list-style: none;
  counter-reset: comp;
}

.methodology__list li {
  counter-increment: comp;
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.methodology__list li:first-child {
  border-top: 1px solid var(--border-subtle);
}

.methodology__list li::before {
  content: counter(comp, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--copper);
  opacity: 0.65;
  flex-shrink: 0;
  line-height: 1.4;
  margin-top: 1px;
}

/* ==============================================
   FOOTER
   ============================================== */

.footer {
  background-color: var(--charcoal);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__copy {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.footer__links {
  display: flex;
  gap: 32px;
  list-style: none;
  flex-wrap: wrap;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--copper);
  opacity: 1;
}

/* ==============================================
   DEAL CASE STUDIES (deals.html)
   ============================================== */

.deals-section {
  padding: var(--section-pad);
  background-color: var(--navy);
}

.deals-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background-color: var(--border-subtle);
}

.deal-card {
  background-color: var(--charcoal);
  padding: 56px var(--card-pad);
}

.deal-card__top {
  margin-bottom: 36px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-subtle);
}

.deal-card__company {
  font-family: var(--font-display);
  font-size: 2.125rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 6px;
}

.deal-card__meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.deal-card__role {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--copper);
}

.deal-card__date {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.deal-card__sections {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.deal-section__label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 12px;
}

.deal-section__text {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.deal-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
}

.tag {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid var(--slate);
  color: var(--text-secondary);
}

/* ==============================================
   TECHNICAL (technical.html)
   ============================================== */

.tech-section {
  padding: var(--section-pad);
  background-color: var(--navy);
}

.tech-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background-color: var(--border-subtle);
}

.tech-card {
  background-color: var(--charcoal);
  padding: 48px var(--card-pad);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 56px;
  align-items: start;
}

.tech-card__heading {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.35;
  padding-top: 4px;
}

.tech-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tech-card__list li {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  padding-left: 20px;
  position: relative;
  line-height: 1.55;
}

.tech-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 1px;
  background-color: var(--copper);
}

.tech-closing {
  margin-top: 56px;
  padding: 48px var(--card-pad);
  border-left: 3px solid var(--copper);
  background-color: rgba(45, 49, 66, 0.4);
}

.tech-closing p {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.65;
  max-width: 800px;
  margin-bottom: 0;
}

/* ==============================================
   CONTACT (contact.html)
   ============================================== */

.contact-section {
  padding: var(--section-pad);
  background-color: var(--navy);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 88px;
  align-items: start;
}

.contact-info__intro {
  margin-top: 20px;
  margin-bottom: 40px;
  font-size: 1.0625rem;
  color: var(--text-secondary);
}

.contact-info__item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.contact-info__item:first-of-type {
  border-top: 1px solid var(--border-subtle);
}

.contact-info__label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 6px;
}

.contact-info__value a {
  font-size: 1rem;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.contact-info__value a:hover {
  color: var(--copper);
  opacity: 1;
}

.contact-form-wrap h3 {
  margin-bottom: 32px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  background-color: var(--charcoal);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 14px 18px;
  transition: border-color 0.2s ease;
  outline: none;
  -webkit-appearance: none;
  border-radius: 0;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--copper);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.form-note {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ==============================================
   RESPONSIVE
   ============================================== */

@media (max-width: 1024px) {
  .container {
    padding: 0 32px;
  }

  .methodology__grid {
    gap: 56px;
  }

  .deal-card__sections {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .tech-card {
    grid-template-columns: 180px 1fr;
    gap: 36px;
  }

  .contact-layout {
    gap: 60px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-pad:  64px 0;
    --card-pad:     24px;
  }

  .container {
    padding: 0 20px;
  }

  /* Mobile nav */
  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--charcoal);
    flex-direction: column;
    justify-content: flex-start;
    gap: 0;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-subtle);
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__links li {
    width: 100%;
  }

  .nav__links a {
    display: block;
    padding: 14px 24px;
  }

  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  /* Hero */
  .hero {
    padding: 72px 0 64px;
    min-height: auto;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__ctas .btn {
    width: 100%;
    text-align: center;
    padding: 16px 30px;
  }

  /* Achievements */
  .achievements__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Methodology */
  .methodology__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  /* Deals */
  .deal-card {
    padding: 40px 24px;
  }

  .deal-card__sections {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Tech */
  .tech-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* Contact */
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  /* Footer */
  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__links {
    flex-wrap: wrap;
    gap: 16px 28px;
  }
}

@media (max-width: 480px) {
  .achievements__grid {
    grid-template-columns: 1fr;
  }
}