/* ============================================================================
   PANTALEONI ENGINEERING
   Design Language: Architectural Editorial v1.0
   ============================================================================ */

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-background:        #FCFCFB;
  --color-background-warm:   #F0EDE8;
  --color-inverse:           #1C1C1C;
  --color-accent:            #C4A77D;

  --color-text-primary:      #1C1C1C;
  --color-text-secondary:    #333333;
  --color-text-tertiary:     #555555;
  --color-text-muted:        #888888;
  --color-text-subtle:       #999999;
  --color-text-disabled:     #AAAAAA;

  --color-text-inverse:      #FCFCFB;
  --color-text-inverse-muted:#888888;
  --color-text-inverse-subtle:#666666;

  --color-border:            #E5E5E5;

  /* Typography */
  --font-serif:              Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --font-sans:               "Helvetica Neue", Helvetica, Arial, sans-serif;

  --text-xs:                 11px;
  --text-sm:                 12px;
  --text-base:               13px;
  --text-md:                 14px;
  --text-lg:                 16px;
  --text-xl:                 18px;
  --text-2xl:                20px;
  --text-3xl:                22px;
  --text-4xl:                28px;
  --text-5xl:                36px;
  --text-6xl:                42px;

  --text-display:            clamp(40px, 6vw, 72px);
  --text-headline:           clamp(28px, 4vw, 42px);
  --text-subhead:            clamp(24px, 3vw, 36px);

  --weight-normal:           400;
  --weight-medium:           500;

  --leading-tight:           1.05;
  --leading-snug:            1.2;
  --leading-normal:          1.4;
  --leading-relaxed:         1.6;
  --leading-loose:           1.9;

  --tracking-tight:          -0.02em;
  --tracking-normal:         0;
  --tracking-wide:           0.05em;
  --tracking-wider:          0.1em;
  --tracking-widest:         0.15em;
  --tracking-caps:           0.2em;

  /* Spacing */
  --space-2:                 8px;
  --space-3:                 12px;
  --space-4:                 16px;
  --space-6:                 24px;
  --space-7:                 32px;
  --space-8:                 40px;
  --space-9:                 48px;
  --space-10:                60px;
  --space-11:                80px;
  --space-12:                120px;
  --space-13:                160px;
  --space-14:                200px;

  --margin-page-left:        120px;
  --margin-page-right:       60px;

  /* Motion */
  --duration-instant:        0.1s;
  --duration-normal:         0.3s;
  --duration-slow:           0.4s;
  --ease-default:            ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  font-weight: var(--weight-normal);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* --- Links --- */
a {
  color: inherit;
  text-decoration: none;
}

/* --- Selection --- */
::selection {
  background-color: var(--color-accent);
  color: var(--color-inverse);
}

/* --- Focus States --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* --- Progress Indicator --- */
.progress-indicator {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background-color: var(--color-accent);
  z-index: 1000;
  transition: width var(--duration-instant) linear;
  width: 0;
}

/* --- Fixed Side Label --- */
.side-label {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--margin-page-left);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  pointer-events: none;
}

.side-label__text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-disabled);
  white-space: nowrap;
}

/* --- Header --- */
.header {
  position: fixed;
  top: var(--space-8);
  right: var(--space-10);
  z-index: 100;
}

.header__cta {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-primary);
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--color-text-primary);
  background: transparent;
  cursor: pointer;
  transition:
    background-color var(--duration-normal) var(--ease-default),
    color var(--duration-normal) var(--ease-default);
}

.header__cta:hover {
  background-color: var(--color-text-primary);
  color: var(--color-background);
}

/* --- Page Container --- */
.page {
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* --- Content Area --- */
.content {
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-right);
}

/* --- Section --- */
.section {
  padding-top: var(--space-14);
  padding-bottom: var(--space-14);
}

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

/* --- Section Label --- */
.section-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.section--inverse .section-label {
  color: var(--color-text-inverse-subtle);
}

/* --- Accent Rule --- */
.accent-rule {
  width: 48px;
  height: 2px;
  background-color: var(--color-accent);
  margin-bottom: var(--space-7);
}

.accent-rule--short {
  width: 32px;
}

.accent-rule--muted {
  background-color: var(--color-border);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-left: var(--margin-page-left);
}

.hero__primary {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-right: var(--space-11);
}

.hero__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-9);
}

.hero__headline {
  font-family: var(--font-serif);
  font-size: var(--text-display);
  font-weight: var(--weight-normal);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

.hero__secondary {
  background-color: var(--color-background-warm);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-10);
}

.hero__content {
  max-width: 320px;
}

.hero__lead {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-tertiary);
  margin: 0;
}

.hero__note {
  margin-top: var(--space-7);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-subtle);
}

/* --- Quote Section --- */
.quote-section {
  padding: var(--space-14) 0;
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-left);
}

.quote-section__layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-11);
  align-items: start;
}

.quote-section__label {
  padding-top: var(--space-4);
}

.quote-section__text {
  font-family: var(--font-serif);
  font-size: var(--text-subhead);
  font-weight: var(--weight-normal);
  font-style: italic;
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0;
}

/* --- Capabilities Section --- */
.capabilities {
  background-color: var(--color-inverse);
  color: var(--color-text-inverse);
  padding: var(--space-13) 0;
}

.capabilities__content {
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-right);
}

.capabilities__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
}

.capabilities__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-inverse-subtle);
  margin-bottom: var(--space-10);
}

/* --- Capability Item --- */
.capability-item {
  padding: var(--space-7) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  cursor: default;
  transition: all var(--duration-slow) var(--ease-default);
}

.capability-item__inner {
  display: flex;
  align-items: baseline;
  gap: var(--space-6);
}

.capability-item__number {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  transition: color var(--duration-slow) var(--ease-default);
}

.capability-item:hover .capability-item__number {
  color: var(--color-accent);
}

.capability-item__content {
  flex: 1;
}

.capability-item__title {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: var(--weight-normal);
  margin-bottom: var(--space-2);
  transform: translateX(0);
  transition: transform var(--duration-slow) var(--ease-default);
}

.capability-item:hover .capability-item__title {
  transform: translateX(8px);
}

.capability-item__subtitle {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  opacity: 0.6;
  transition: opacity var(--duration-slow) var(--ease-default);
}

.capability-item:hover .capability-item__subtitle {
  opacity: 1;
}

/* --- Accent Panel --- */
.accent-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.accent-panel__box {
  background-color: var(--color-accent);
  padding: var(--space-10);
  margin-left: var(--space-11);
}

.accent-panel__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.5);
  margin-bottom: var(--space-6);
}

.accent-panel__text {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  line-height: var(--leading-relaxed);
  color: var(--color-inverse);
}

/* --- Process Section --- */
.process-section {
  padding: var(--space-14) 0;
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-left);
}

.process-section__layout {
  display: grid;
  grid-template-columns: 200px 1fr 1fr 1fr;
  gap: var(--space-10);
}

.process-section__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

/* --- Process Step --- */
.process-step__rule {
  width: 32px;
  height: 2px;
  background-color: var(--color-border);
  margin-bottom: var(--space-7);
}

.process-step__rule--accent {
  background-color: var(--color-accent);
}

.process-step__title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: var(--weight-normal);
  margin-bottom: var(--space-4);
}

.process-step__text {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-tertiary);
}

/* --- Work Section --- */
.work-section {
  padding: var(--space-14) 0;
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-left);
  border-top: 1px solid var(--color-border);
}

.work-section__layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-11);
  align-items: start;
}

.work-section__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.work-section__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
}

/* --- Work Card --- */
.work-card {
  padding: var(--space-7);
  border: 1px solid var(--color-border);
  transition: border-color var(--duration-normal) var(--ease-default);
}

.work-card:hover {
  border-color: var(--color-accent);
}

.work-card__title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--weight-normal);
  margin-bottom: var(--space-4);
  line-height: var(--leading-snug);
}

.work-card__summary {
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--leading-loose);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.work-card__metrics {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-style: italic;
}

/* --- Contact Section --- */
.contact-section {
  padding: var(--space-13) 0;
  border-top: 1px solid var(--color-border);
  margin-left: var(--margin-page-left);
  margin-right: var(--margin-page-left);
}

.contact-section__layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-11);
  align-items: end;
}

.contact-section__label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.contact-section__email {
  font-family: var(--font-serif);
  font-size: var(--text-headline);
  color: var(--color-text-primary);
  text-decoration: none;
  display: inline-block;
  position: relative;
}

.contact-section__email::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--duration-slow) var(--ease-default);
}

.contact-section__email:hover::after {
  width: 100%;
}

.contact-section__meta {
  margin-top: var(--space-7);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-subtle);
}

/* --- Footer --- */
.footer {
  padding: var(--space-8) var(--margin-page-left);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-disabled);
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
  :root {
    --margin-page-left: 60px;
    --margin-page-right: 40px;
    --space-14: 160px;
    --space-12: 100px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero__primary {
    padding: var(--space-14) var(--margin-page-right) var(--space-12) 0;
  }

  .hero__secondary {
    padding: var(--space-12);
  }

  .quote-section__layout {
    grid-template-columns: 1fr;
    gap: var(--space-9);
  }

  .capabilities__layout {
    grid-template-columns: 1fr;
    gap: var(--space-11);
  }

  .accent-panel__box {
    margin-left: 0;
    margin-top: var(--space-11);
  }

  .process-section__layout {
    grid-template-columns: 1fr 1fr;
  }

  .process-section__layout > *:first-child {
    grid-column: 1 / -1;
    margin-bottom: var(--space-9);
  }

  .contact-section__layout {
    grid-template-columns: 1fr;
    gap: var(--space-9);
  }

  .work-section__layout {
    grid-template-columns: 1fr;
    gap: var(--space-9);
  }

  .work-section__grid {
    grid-template-columns: 1fr;
  }

  .side-label {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --margin-page-left: 24px;
    --margin-page-right: 24px;
    --space-14: 100px;
    --space-12: 80px;
    --space-11: 60px;
  }

  .header {
    top: var(--space-6);
    right: var(--space-6);
  }

  .process-section__layout {
    grid-template-columns: 1fr;
  }

  .capability-item__inner {
    flex-direction: column;
    gap: var(--space-2);
  }

  .footer {
    flex-direction: column;
    gap: var(--space-4);
    padding-left: var(--margin-page-left);
    padding-right: var(--margin-page-left);
  }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .progress-indicator {
    display: none;
  }
}