/* ============================================================
   DESIGN SYSTEM — styles.css
   Alex Mercer Portfolio
   ============================================================ */

/* ── 1. TOKENS ── */
:root {
  /* Color */
  --color-bg:          #13131a;
  --color-surface:     #1a1a24;
  --color-surface-2:   #22222f;
  --color-border:      #2a2a3a;
  --color-accent:      #3b9eff;
  --color-accent-dim:  rgba(59, 158, 255, 0.12);
  --color-accent-glow: rgba(59, 158, 255, 0.25);
  --color-text:        #e4e4f0;
  --color-text-muted:  #7878a0;
  --color-text-faint:  #44445a;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  96px;
  --space-10: 128px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --text-xs:   11px;
  --text-sm:   13px;
  --text-base: 16px;
  --text-md:   18px;
  --text-lg:   22px;
  --text-xl:   28px;
  --text-2xl:  36px;
  --text-3xl:  48px;
  --text-4xl:  60px;
  --text-5xl:  76px;

  /* Radii */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  14px;

  /* Transitions */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.4, 0, 1, 1);
  --duration:  260ms;
  --duration-slow: 500ms;

  /* Layout */
  --max-width: 1100px;
  --nav-height: 68px;
}

/* ── 2. RESET & BASE ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: var(--text-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img, svg {
  display: block;
}

ul {
  list-style: none;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ── 3. LAYOUT HELPERS ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-10) 0;
}

/* ── 4. BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 13px 26px;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-md);
  transition: all var(--duration) var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--color-accent-glow);
}
.btn--primary:hover {
  background: #5aaeff;
  box-shadow: 0 8px 28px var(--color-accent-glow);
  transform: translateY(-1px);
}
.btn--primary:active {
  transform: translateY(0);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.btn--small {
  padding: 9px 18px;
  font-size: var(--text-xs);
}

/* ── 5. NAV ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out);
  will-change: background;
}

.nav.scrolled {
  background: rgba(19, 19, 26, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

@supports not (backdrop-filter) {
  .nav.scrolled {
    backdrop-filter: none; /* fully opaque fallback */
  }
}
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-text);
  transition: color var(--duration) var(--ease-out);
}
.nav__logo:hover { color: var(--color-accent); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration) var(--ease-out);
  position: relative;
}
.nav__link:hover { color: var(--color-text); }
.nav__link.active { color: var(--color-accent); }

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--duration) var(--ease-out);
}
.nav__link:hover::after { width: 100%; }

/* Nav toggle — mobile */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: 201;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: all var(--duration) var(--ease-out);
  transform-origin: center;
}
.nav__toggle.open span:first-child {
  transform: translateY(3.25px) rotate(45deg);
}
.nav__toggle.open span:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* ── 6. HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(59, 158, 255, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 20% 80%, rgba(59, 100, 255, 0.04) 0%, transparent 60%);
  animation: bgDrift 18s ease-in-out infinite alternate;
}

@keyframes bgDrift {
  0%   { opacity: 0.7; transform: scale(1) translate(0, 0); }
  100% { opacity: 1;   transform: scale(1.05) translate(1%, -1%); }
}

.hero__content {
  position: relative;
  z-index: 1;
  padding-top: var(--space-9);
  padding-bottom: var(--space-9);
}

.hero__eyebrow {
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}

.hero__headline {
  font-size: clamp(44px, 7vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero__sub {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 480px;
  margin-bottom: var(--space-7);
}

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

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-7);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 0.9; transform: scaleY(1.1); }
}

/* ── 7. SECTION HEADER ── */
.section__header {
  margin-bottom: var(--space-8);
}

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

.section__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text);
}

/* ── 8. PROJECT CARDS ── */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-5);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  cursor: pointer;
  transition: transform var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0;
  transition: opacity var(--duration) var(--ease-out);
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 158, 255, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(59, 158, 255, 0.1);
}
.project-card:hover::before { opacity: 1; }

.project-card__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.project-card__tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.project-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-text);
}

.project-card__problem {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.project-card__solution {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.65;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.project-card__outcome {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  display: inline-block;
  margin-top: auto;
}

.project-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.project-card__links {
  display: flex;
  gap: var(--space-3);
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: color var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}

.project-card__link svg {
  width: 13px;
  height: 13px;
}

.project-card__link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-dim);
}

.project-card__cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  transition: gap var(--duration) var(--ease-out);
}

.project-card__cta svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration) var(--ease-out);
}

.project-card:hover .project-card__cta { gap: var(--space-3); }
.project-card:hover .project-card__cta svg { transform: translateX(3px); }

.projects__more {
  display: flex;
  justify-content: center;
  margin-top: var(--space-8);
}

/* ── 9. CASE STUDIES ── */
.case-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.case-item {
  background: var(--color-surface);
  padding: var(--space-8) var(--space-8);
  transition: background var(--duration) var(--ease-out);
  position: relative;
}

.case-item + .case-item {
  border-top: 1px solid var(--color-border);
}

.case-item:hover { background: var(--color-surface-2); }

.case-item__header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  align-items: start;
  margin-bottom: var(--space-6);
}

.case-item__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.case-item__index {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.case-item__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.case-item__status {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 5px 12px;
  white-space: nowrap;
  align-self: start;
}

.case-item__status.live {
  color: #4ade80;
  border-color: rgba(74, 222, 128, 0.2);
  background: rgba(74, 222, 128, 0.05);
}

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

.case-block__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.case-block__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.case-item__stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.stack-badge {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
}

/* ── 10. ABOUT ── */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--space-10);
  align-items: start;
}

.about__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-6);
  margin-top: var(--space-4);
}

.about__body {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 540px;
  margin-bottom: var(--space-5);
}

.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.about__more {
  margin-top: var(--space-7);
}

.tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 6px 14px;
  transition: color var(--duration) var(--ease-out),
              border-color var(--duration) var(--ease-out);
}
.tag:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.about__stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
}

.about__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.about__stat:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.stat__number {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--color-text);
  line-height: 1;
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ── 11. CONTACT ── */
.contact {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.contact__inner {
  padding: var(--space-7) var(--space-6);
}

.contact__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: var(--space-5);
  margin-top: var(--space-4);
}

.contact__sub {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: var(--space-7);
  max-width: 480px;
}

.contact__email {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.5rem	;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-accent);
  transition: gap var(--duration) var(--ease-out),
              color var(--duration) var(--ease-out);
}
.contact__email:hover { gap: var(--space-5); color: #5aaeff; }

.contact__arrow {
  width: 22px;
  height: 22px;
  transition: transform var(--duration) var(--ease-out);
}
.contact__email:hover .contact__arrow { transform: translateX(4px); }

.contact__links {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-7);
}

.contact__social {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration) var(--ease-out);
  position: relative;
}
.contact__social::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--duration) var(--ease-out);
}
.contact__social:hover { color: var(--color-text); }
.contact__social:hover::after { width: 100%; }

/* ── 12. FOOTER ── */
.footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
}

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

.footer__name {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

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

/* ── 13. MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 10, 16, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 88vh;
  overflow-y: auto;
  position: relative;
  padding: var(--space-8);
  transform: translateY(12px);
  transition: transform var(--duration-slow) var(--ease-out);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal__close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  transition: color var(--duration) var(--ease-out),
              background var(--duration) var(--ease-out);
}
.modal__close svg { width: 18px; height: 18px; }
.modal__close:hover { color: var(--color-text); background: var(--color-surface-2); }

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

.modal__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  padding-right: var(--space-8);
}

.modal__links {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.modal__links svg {
  width: 15px;
  height: 15px;
}

.modal__section {
  margin-bottom: var(--space-6);
}

.modal__section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.modal__section-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.modal__divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-6) 0;
}

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

.modal__feature {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.modal__feature::before {
  content: '→';
  color: var(--color-accent);
  font-size: var(--text-xs);
  flex-shrink: 0;
}

.modal__stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ── 14. REVEAL ANIMATIONS ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* Project cards stagger */
.project-card.reveal { transition-delay: calc(var(--i, 0) * 0.08s); }

/* ── 15. MOBILE NAV OVERLAY ── */
@media (max-width: 768px) {
  .nav__toggle { display: flex; }

  .nav__links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-7);
    background: var(--color-bg);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-slow) var(--ease-out);
  }

  .nav__links.open {
    opacity: 1;
    pointer-events: all;
  }

  .nav__link {
    font-size: var(--text-xl);
    font-weight: 700;
  }

  .nav__link.btn--ghost {
    font-size: var(--text-base);
    padding: 14px 32px;
  }
}

/* ── 16. RESPONSIVE LAYOUT ── */
@media (max-width: 900px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .about__stat-card {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
  }

  .about__stat {
    border-bottom: none;
    padding-bottom: 0;
    min-width: 140px;
    text-align: center;
  }

  .case-item__body {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .case-item__header {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ── 17. SUB-PAGE PATTERNS (page header, CTA band, article) ── */

.page-header {
  padding-top: calc(var(--nav-height) + var(--space-9));
  padding-bottom: var(--space-8);
}

.page-header__title {
  font-size: clamp(40px, 6vw, var(--text-4xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  max-width: 760px;
}

.page-header__sub {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 540px;
}

/* CTA band */
.cta-band {
  border-top: 1px solid var(--color-border);
}

.cta-band__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-5);
}

.cta-band__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text);
}

.cta-band__sub {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  max-width: 480px;
}

/* Article / post content (for now page and blog posts) */
.article {
  padding-top: calc(var(--nav-height) + var(--space-8));
}

.article__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.article__date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article__title {
  font-size: clamp(36px, 6vw, var(--text-4xl));
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text);
  margin-bottom: var(--space-7);
  max-width: 760px;
}

.article__body {
  max-width: 680px;
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: 1.85;
}

.article__body > * + * {
  margin-top: var(--space-5);
}

.article__body h2 {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-2);
}

.article__body h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-top: var(--space-7);
  margin-bottom: var(--space-2);
}

.article__body p {
  margin: 0;
}

.article__body ul,
.article__body ol {
  padding-left: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.article__body li {
  line-height: 1.75;
}

.article__body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-glow);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--duration) var(--ease-out);
}
.article__body a:hover {
  text-decoration-color: var(--color-accent);
}

.article__body code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85em;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--color-text);
}

.article__body pre {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  overflow-x: auto;
  font-size: var(--text-sm);
  line-height: 1.6;
}

.article__body pre code {
  background: none;
  border: none;
  padding: 0;
}

.article__body blockquote {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-5);
  color: var(--color-text);
  font-style: italic;
}

.article__body img {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

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

/* "Now" page — status list */
.now-list {
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.now-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-bottom: var(--space-7);
  border-bottom: 1px solid var(--color-border);
}

.now-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.now-item__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.now-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.now-item__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.75;
}

.now-updated {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-8);
}

/* About page extras */
.about-page__intro {
  padding-top: calc(var(--nav-height) + var(--space-9));
  padding-bottom: var(--space-8);
}

.about-page__lead {
  font-size: clamp(28px, 4vw, var(--text-2xl));
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--color-text);
  max-width: 720px;
}

/* Back link (for post pages) */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  transition: color var(--duration) var(--ease-out),
              gap var(--duration) var(--ease-out);
}

.back-link svg {
  width: 14px;
  height: 14px;
  transform: rotate(180deg);
  transition: transform var(--duration) var(--ease-out);
}

.back-link:hover {
  color: var(--color-accent);
  gap: var(--space-3);
}
.back-link:hover svg { transform: rotate(180deg) translateX(3px); }

@media (max-width: 640px) {
  .page-header { padding-top: calc(var(--nav-height) + var(--space-7)); }
  .article { padding-top: calc(var(--nav-height) + var(--space-6)); }
  .cta-band__inner { align-items: stretch; }
  .cta-band__inner .btn { text-align: center; justify-content: center; }
}
.article-content {
  animation: articleFadeIn 0.4s ease-out !important;
}

@keyframes articleFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}