/* =========================================================
   Alex Tour-Sarkissian Portfolio
   Shared global styles
   ========================================================= */

:root {
  --color-background: #f5f7fa;
  --color-surface: #ffffff;
  --color-surface-alt: #edf2f6;

  --color-text: #172033;
  --color-text-soft: #4d5b70;
  --color-text-muted: #6d7889;

  --color-primary: #17658f;
  --color-primary-dark: #104b6d;
  --color-primary-light: #dcecf5;
  --color-accent: #b76532;
  --color-border: #d6dee7;

  --shadow-small: 0 4px 15px rgb(20 35 55 / 8%);
  --shadow-medium: 0 12px 34px rgb(20 35 55 / 13%);

  --radius-small: 0.4rem;
  --radius-medium: 0.85rem;
  --radius-large: 1.25rem;

  --container-width: 1200px;
  --content-width: 820px;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  --transition-fast: 160ms ease;
  --transition-standard: 240ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-background);
  font-family:
    Inter,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

button,
input,
textarea,
select {
  font: inherit;
}

a {
  color: var(--color-primary);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-primary-dark);
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 5.4rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.65rem);
}

p,
ul,
ol {
  margin-top: 0;
}

/* Accessibility */

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 9999;
  padding: 0.7rem 1rem;
  color: #ffffff;
  background: var(--color-primary-dark);
  border-radius: var(--radius-small);
  transform: translateY(-160%);
  transition: transform var(--transition-fast);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

/* Shared layouts */

.site-container {
  width: min(calc(100% - 2rem), var(--container-width));
  margin-inline: auto;
}

.content-container {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-8);
}

.section--compact {
  padding-block: var(--space-7);
}

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

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

.section-heading {
  max-width: 760px;
  margin-bottom: var(--space-6);
}

.section-eyebrow {
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-description {
  max-width: 720px;
  color: var(--color-text-soft);
  font-size: 1.05rem;
}

/* Navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgb(255 255 255 / 94%);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.site-nav {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-logo {
  color: var(--color-text);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  padding: 0.55rem 0.75rem;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-soft);
  font-weight: 600;
  text-decoration: none;
}

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

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4rem, 10vw, 8rem);
  color: #ffffff;
  background:
    linear-gradient(120deg, rgb(10 31 51 / 92%), rgb(16 73 111 / 78%)),
    var(--hero-image, none);
  background-position: center;
  background-size: cover;
}

.hero h1,
.hero h2,
.hero p {
  color: inherit;
}

.hero-content {
  max-width: 900px;
}

.hero-kicker {
  margin-bottom: var(--space-4);
  color: #cce7f7;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-description {
  max-width: 760px;
  color: rgb(255 255 255 / 88%);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* Buttons */

.button {
  display: inline-flex;
  min-height: 2.9rem;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.15rem;
  color: #ffffff;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-small);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.button:hover {
  color: #ffffff;
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-small);
  transform: translateY(-2px);
}

.button--secondary {
  color: var(--color-primary);
  background: transparent;
}

.button--secondary:hover {
  color: #ffffff;
  background: var(--color-primary);
}

.button--light {
  color: var(--color-text);
  background: #ffffff;
  border-color: #ffffff;
}

/* Metrics */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-7);
}

.metric-card {
  padding: var(--space-5);
  color: #ffffff;
  background: rgb(255 255 255 / 10%);
  border: 1px solid rgb(255 255 255 / 22%);
  border-radius: var(--radius-medium);
  backdrop-filter: blur(6px);
}

.metric-value {
  display: block;
  font-size: clamp(1.65rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.1;
}

.metric-label {
  display: block;
  margin-top: var(--space-2);
  color: rgb(255 255 255 / 78%);
  font-size: 0.9rem;
}

/* Cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.card {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-small);
  transition:
    transform var(--transition-standard),
    box-shadow var(--transition-standard);
}

.card:hover {
  box-shadow: var(--shadow-medium);
  transform: translateY(-5px);
}

.card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-content {
  padding: var(--space-5);
}

.card-title {
  margin-bottom: var(--space-3);
}

.card-meta {
  margin-bottom: var(--space-3);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.card-description {
  color: var(--color-text-soft);
}

.card-link {
  display: inline-flex;
  margin-top: var(--space-4);
  align-items: center;
  gap: 0.35rem;
  font-weight: 700;
  text-decoration: none;
}

/* Technology tags */

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag,
.tech-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.7rem;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  border: 1px solid #bfd9e9;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

/* Two-column layouts */

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
}

.split-layout--reverse > :first-child {
  order: 2;
}

.media-panel {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-medium);
}

/* Footer */

.site-footer {
  padding-block: var(--space-7);
  color: #dfe8ef;
  background: #101b29;
}

.site-footer a {
  color: #ffffff;
}

.footer-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Utilities */

.text-center {
  text-align: center;
}

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

.max-width-text {
  max-width: 720px;
}

.margin-inline-auto {
  margin-inline: auto;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  clip-path: inset(50%) !important;
}

/* JavaScript enhancements */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 600ms ease,
    transform 600ms ease;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

body.nav-open {
  overflow: hidden;
}