/*
  style.css — Becoming by Tabassum Chowdhury
  Dark film aesthetic — accessible colors (WCAG 2.1 AA)
*/

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

/* ══ TOKENS ══ */
:root {
  --bg:           #111009;
  --bg-deep:      #0a0906;
  --bg-darker:    #080705;
  --border:       #2e2820;
  --border-dim:   #201c12;

  /* Gold — #d4b87a on #0a0906 = 7.1:1 AAA */
  --gold:         #d4b87a;
  --gold-dim:     #8a7a58;

  /* Text — all checked against #111009 */
  /* #f0e8d8 = 16.2:1 AAA */
  --text:         #f0e8d8;
  /* #d8ceba = 11.0:1 AAA */
  --text-prose:   #d8ceba;
  /* #b0a48e = 6.2:1 AA */
  --text-ui:      #b0a48e;
  /* #8a7e6c = 4.6:1 AA */
  --text-muted:   #8a7e6c;

  --frame-border: #3a3020;

  --serif: 'EB Garamond', Georgia, serif;
  --mono:  'Courier Prime', 'Courier New', monospace;

  --content-w: 760px;
}

/* ══ BASE ══ */
html {
  font-size: 100%;
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before,
body::after {
  content: '';
  position: fixed;
  top: 0;
  bottom: 0;
  width: 28px;
  background-color: var(--bg-deep);
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 6px,
    var(--bg-deep) 6px,
    var(--bg-deep) 8px,
    #1a1812 8px,
    #1a1812 18px,
    var(--bg-deep) 18px,
    var(--bg-deep) 20px,
    transparent 20px,
    transparent 26px
  );
  z-index: 50;
  pointer-events: none;
}

body::before {
  left: 0;
  border-right: 1px solid var(--border);
}

body::after {
  right: 0;
  border-left: 1px solid var(--border);
}

body::before,
body::after { display: none; }

@media (min-width: 641px) {
  body::before,
  body::after { display: block; }
}

/* ══ SKIP LINK ══ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  background: var(--gold);
  color: #0a0906;
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: bold;
  padding: 0.5rem 1rem;
  text-decoration: none;
  border-radius: 0 0 3px 3px;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ══ FOCUS ══ */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
:focus:not(:focus-visible) { outline: none; }

/* ══ HEADER ══ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-deep);
  border-bottom: 1px solid var(--border);
  margin: 0 29px;
}

.top-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 15px 28px;
}

.site-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 20px;
  color: var(--gold-dim);
  letter-spacing: 0.04em;
}

.site-sub {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ══ NAV RAIL ══ */
.nav-rail {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 20px;
  border-top: 1px solid var(--border);
  gap: 0;
}
.nav-rail::-webkit-scrollbar { display: none; }

.nav-tab {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-ui);
  background: none;
  border: none;
  border-bottom: 1.5px solid transparent;
  padding: 13px 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s;
  user-select: none;
  line-height: 1;
}
.nav-tab:hover { color: var(--gold-dim); }
.nav-tab.active { color: var(--gold); border-bottom-color: var(--gold); }
.nav-tab.locked {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ══ FRAME STRIP ══ */
.frame-rail {
  display: none;
  border-top: 1px solid var(--border-dim);
  background: var(--bg-darker);
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.frame-rail::-webkit-scrollbar { display: none; }
.frame-rail.visible { display: block; }

.frame-strip {
  display: flex;
  align-items: center;
  padding: 0 20px;
  width: max-content;
  list-style: none;
  gap: 0;
}

.sprocket-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0 5px;
}

.sp {
  width: 7px;
  height: 5px;
  border: 1px solid #1a1610;
  border-radius: 1px;
  background: var(--bg-darker);
}

.frame-item { padding: 0 4px; }

.frame-item button {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: transform 0.15s;
}
.frame-item button:hover { transform: translateY(-2px); }

.frame-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 3px;
  display: block;
}

.frame-img {
  display: block;
  width: 62px;
  height: 48px;
  border: 1.5px solid var(--frame-border);
  overflow: hidden;
  transition: border-color 0.25s;
}
.frame-img.active { border-color: var(--gold); }
.frame-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ══ PAGE SWITCHING ══ */
.month-page { display: none; }
.month-page.active {
  display: block;
  animation: fadeUp 0.3s ease;
  margin: 0 29px;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ══ MONTH HERO ══ */
.month-hero {
  width: var(--content-w);
  margin: 0 auto;
  padding: 56px 28px 40px;
  border-bottom: 1px solid var(--border-dim);
}

.month-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.month-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 32px;
  font-weight: 400;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 10px;
}

.month-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ══ VIGNETTE ══ */
.vignette-section {
  width: var(--content-w);
  margin: 0 auto;
  padding: 64px 28px;
}

.vignette-header { margin-bottom: 30px; }

.v-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 10px;
}

.v-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  font-weight: 400;
  color: var(--text);
  line-height: 1.25;
}

/* ══ PHOTOS — natural dimensions, no cropping ══ */
.photo-area {
  width: 100%;
  border: 1px solid var(--border-dim);
  position: relative;
  overflow: hidden;
  margin-bottom: 36px;
  background: var(--bg-darker);
}

.pa-single > img {
  width: 100%;
  height: auto;
  display: block;
}

.pa-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  align-items: start;
}
.pa-two > img { width: 100%; height: auto; display: block; }

.pa-landscape-top .landscape-img {
  width: 100%;
  height: auto;
  display: block;
}
.pa-landscape-top .portraits-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  margin-top: 2px;
}
.pa-landscape-top .portraits-row img {
  width: 100%;
  height: auto;
  display: block;
}

.pa-three {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2px;
  align-items: start;
}
.pa-three > img { width: 100%; height: auto; display: block; }

.film-corner {
  display: none;
}

/* ══ PROSE ══ */
.prose {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.95;
  color: var(--text-prose);
  width: 620px;
}
.prose p + p { margin-top: 1.1em; }

/* ══ SECTION DIVIDER ══ */
.v-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  width: var(--content-w);
  margin: 0 auto;
  padding: 0 28px;
}
.v-divider::before,
.v-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-dim);
}
.v-divider-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ══ ABOUT PAGE ══ */
.cover-photo {
  width: 100%;
  max-height: 85vh;
  overflow: hidden;
}
.cover-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about-body {
  width: var(--content-w);
  margin: 0 auto;
  padding: 56px 28px 100px;
}

.about-body .month-hero {
  width: 100%;
  margin: 0;
  padding-left: 0;
  padding-right: 0;
}

.about-subheading {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 400;
  margin-bottom: 20px;
}

.about-section { margin-bottom: 40px; }

.about-body .prose {
  width: 100%;
}

.about-rule {
  height: 1px;
  background: var(--border-dim);
  margin: 40px 0;
}

.about-detail { list-style: none; }

.about-detail-row {
  display: flex;
  gap: 24px;
  padding: 10px 0;
  border-top: 1px solid var(--border-dim);
}
.about-detail-row:last-child { border-bottom: 1px solid var(--border-dim); }

.about-detail dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  min-width: 90px;
  padding-top: 1px;
}
.about-detail dd {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-ui);
  letter-spacing: 0.04em;
  line-height: 1.7;
}

/* ══ UNDEVELOPED ══ */
.undeveloped-page {
  width: var(--content-w);
  margin: 0 auto;
  padding: 80px 28px;
}

.ud-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.ud-box {
  border: 1px solid var(--border-dim);
  padding: 36px 28px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

.ud-sprockets { display: flex; flex-direction: column; gap: 6px; }
.ud-sp {
  width: 8px;
  height: 6px;
  border: 1px solid var(--border-dim);
  border-radius: 1px;
  background: var(--bg-deep);
}
.ud-frames { display: flex; gap: 3px; }
.ud-frame {
  width: 40px;
  height: 32px;
  border: 1px solid var(--border-dim);
  background: var(--bg-darker);
}
.ud-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-top: 14px;
}

/* ══ RESPONSIVE — mobile first ══ */
.top-bar { padding: 13px 20px; }
.month-hero,
.vignette-section,
.about-body,
.undeveloped-page {
  width: 100%;
  padding-left: 20px;
  padding-right: 20px;
}
.v-divider { width: 100%; padding-left: 20px; padding-right: 20px; }
.month-title { font-size: 24px; }
.v-title { font-size: 20px; }
.prose { font-size: 16px; width: 100%; }
.pa-three { grid-template-columns: 1fr; }
.pa-two { grid-template-columns: 1fr; }

@media (min-width: 421px) {
  .pa-two { grid-template-columns: 1fr 1fr; }
  .pa-three { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 641px) {
  .top-bar { padding: 15px 28px; }
  .month-hero,
  .vignette-section,
  .about-body,
  .undeveloped-page {
    width: var(--content-w);
    padding-left: 28px;
    padding-right: 28px;
  }
  .v-divider { width: var(--content-w); padding-left: 28px; padding-right: 28px; }
  .month-title { font-size: 32px; }
  .v-title { font-size: 24px; }
  .prose { font-size: 17px; width: 620px; }
  .pa-three { grid-template-columns: 1fr 1fr 1fr; }
}