/* ================================================
   TRIP LOG — style.css
   Film photography travel × literary travelogue
   ================================================ */

/* ----------------------------------------
   CSS Custom Properties
   ---------------------------------------- */
:root {
  /* Colors */
  --color-ecru: #F5F1E8;
  --color-ink: #1A1A1A;
  --color-teal: #2D6A4F;
  --color-sunset: #E76F51;
  --color-pale-beige: #DDD0B8;

  /* Derived colors */
  --color-ink-light: #4A4A4A;
  --color-ink-muted: #7A7A7A;
  --color-ecru-dark: #EBE5D8;
  --color-teal-light: #3D8B6A;
  --color-teal-pale: rgba(45, 106, 79, 0.08);

  /* Typography */
  --font-display: 'Bodoni Moda', 'Georgia', serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-jp: 'Zen Kaku Gothic New', 'Hiragino Kaku Gothic ProN', sans-serif;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;

  /* Layout */
  --article-width: 720px;
  --site-width: 1200px;

  /* Transitions */
  --transition-base: 0.3s ease;
  --transition-slow: 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-jp);
  font-weight: 400;
  color: var(--color-ink);
  background-color: var(--color-ecru);
  line-height: 1.9;
  letter-spacing: 0.02em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul,
ol {
  list-style: none;
}

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

/* ----------------------------------------
   Header
   ---------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(245, 241, 232, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26, 26, 26, 0.06);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--site-width);
  margin: 0 auto;
  padding: 1.25rem 2rem;
}

.header__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink);
}

.header__logo:hover {
  color: var(--color-teal);
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.header__nav-link {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-light);
}

.header__nav-link:hover {
  color: var(--color-teal);
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.header__menu-line {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-ink);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ----------------------------------------
   Hero
   ---------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  height: 85vh;
  min-height: 500px;
  max-height: 900px;
  overflow: hidden;
  margin-top: 62px;
}

.hero__image-wrapper {
  position: absolute;
  inset: 0;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  filter: saturate(0.85) contrast(1.05);
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(26, 26, 26, 0.1) 0%,
    rgba(26, 26, 26, 0.02) 40%,
    rgba(26, 26, 26, 0.4) 75%,
    rgba(26, 26, 26, 0.7) 100%
  );
  pointer-events: none;
}

.hero__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: var(--space-xl) 2rem var(--space-2xl);
  max-width: var(--site-width);
  margin: 0 auto;
}

.hero__meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: var(--space-md);
}

.hero__category {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-ecru);
  background-color: var(--color-teal);
  padding: 0.3em 1em;
}

.hero__date {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: rgba(245, 241, 232, 0.8);
}

.hero__read-time {
  font-family: var(--font-jp);
  font-size: 0.8125rem;
  font-weight: 400;
  color: rgba(245, 241, 232, 0.7);
}

.hero__title {
  font-family: var(--font-jp);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--color-ecru);
}

/* ----------------------------------------
   Article Container
   ---------------------------------------- */
.article {
  padding: var(--space-2xl) 2rem;
}

.article__container {
  max-width: var(--article-width);
  margin: 0 auto;
}

/* ----------------------------------------
   Table of Contents
   ---------------------------------------- */
.toc {
  margin-bottom: var(--space-2xl);
  padding: var(--space-lg);
  background-color: var(--color-ecru-dark);
  border-left: 3px solid var(--color-teal);
}

.toc__heading {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-md);
}

.toc__list {
  counter-reset: toc-counter;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toc__item {
  counter-increment: toc-counter;
}

.toc__link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--font-jp);
  font-size: 0.9375rem;
  font-weight: 400;
  color: var(--color-ink-light);
  padding: 0.25rem 0;
  transition: color var(--transition-base), padding-left var(--transition-base);
}

.toc__link::before {
  content: counter(toc-counter, decimal-leading-zero);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  flex-shrink: 0;
  transition: color var(--transition-base);
}

.toc__link:hover {
  color: var(--color-teal);
  padding-left: 0.25rem;
}

.toc__link:hover::before {
  color: var(--color-teal);
}

.toc__link.is-active {
  color: var(--color-teal);
  font-weight: 500;
}

.toc__link.is-active::before {
  color: var(--color-teal);
}

/* ----------------------------------------
   Article Body
   ---------------------------------------- */
.article__body {
  position: relative;
}

.article__section {
  margin-bottom: var(--space-2xl);
}

.article__heading {
  font-family: var(--font-jp);
  font-size: 1.375rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-pale-beige);
}

.article__text {
  font-family: var(--font-jp);
  font-size: 1rem;
  font-weight: 400;
  line-height: 2;
  color: var(--color-ink-light);
  margin-bottom: var(--space-md);
  text-align: justify;
}

.article__text:last-child {
  margin-bottom: 0;
}

/* ----------------------------------------
   Article Figure / Inline Images
   ---------------------------------------- */
.article__figure {
  margin: var(--space-xl) calc(-2rem);
  margin-bottom: var(--space-xl);
}

.article__figure-image {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05) brightness(0.98);
}

.article__figure-caption {
  font-family: var(--font-jp);
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-ink-muted);
  padding: var(--space-sm) 2rem 0;
  letter-spacing: 0.02em;
}

/* ----------------------------------------
   Blockquote
   ---------------------------------------- */
.article__blockquote {
  margin: var(--space-2xl) 0;
  padding: var(--space-lg) var(--space-lg);
  border-left: 4px solid var(--color-teal);
  background-color: var(--color-teal-pale);
}

.article__blockquote p {
  font-family: var(--font-jp);
  font-size: 1.0625rem;
  font-weight: 400;
  font-style: italic;
  line-height: 1.9;
  color: var(--color-ink);
  letter-spacing: 0.04em;
}

.article__blockquote cite {
  display: block;
  margin-top: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  font-style: normal;
  color: var(--color-ink-muted);
  letter-spacing: 0.03em;
}

/* ----------------------------------------
   Map Placeholder
   ---------------------------------------- */
.article__map {
  margin: var(--space-2xl) 0;
}

.article__map-inner {
  padding: var(--space-xl);
  border: 1px solid var(--color-pale-beige);
  text-align: center;
}

.article__map-label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-sm);
}

.article__map-description {
  font-family: var(--font-jp);
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-ink-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.article__map-placeholder {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-pale-beige);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  cursor: pointer;
  transition: border-color var(--transition-base), color var(--transition-base);
}

.article__map-placeholder:hover {
  border-color: var(--color-teal);
  color: var(--color-teal);
}

.article__map-icon {
  width: 18px;
  height: 18px;
}

/* ----------------------------------------
   SNS Share
   ---------------------------------------- */
.share {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-pale-beige);
  text-align: center;
}

.share__label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
}

.share__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

.share__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--color-pale-beige);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-ink-light);
  transition: all var(--transition-base);
}

.share__button:hover {
  border-color: var(--color-ink);
  color: var(--color-ink);
}

.share__button--twitter:hover {
  border-color: #1DA1F2;
  color: #1DA1F2;
}

.share__button--facebook:hover {
  border-color: #1877F2;
  color: #1877F2;
}

.share__button--line:hover {
  border-color: #00B900;
  color: #00B900;
}

/* ----------------------------------------
   Author Bio
   ---------------------------------------- */
.author {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-pale-beige);
}

.author__inner {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.author__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: 0.25rem;
}

.author__name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.author__bio {
  font-family: var(--font-jp);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-ink-muted);
}

/* ----------------------------------------
   Related Articles
   ---------------------------------------- */
.related {
  padding: var(--space-3xl) 2rem;
  background-color: var(--color-ecru-dark);
}

.related__inner {
  max-width: var(--site-width);
  margin: 0 auto;
}

.related__heading {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--color-ink);
}

.related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.related__card {
  background-color: var(--color-ecru);
  transition: transform var(--transition-base);
}

.related__card:hover {
  transform: translateY(-4px);
}

.related__card-link {
  display: block;
}

.related__card-image-wrapper {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.related__card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05);
  transition: transform var(--transition-slow);
}

.related__card:hover .related__card-image {
  transform: scale(1.05);
}

.related__card-body {
  padding: var(--space-md) var(--space-md) var(--space-lg);
}

.related__card-category {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: 0.5rem;
}

.related__card-title {
  font-family: var(--font-jp);
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.related__card-date {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

/* ----------------------------------------
   Footer
   ---------------------------------------- */
.footer {
  padding: var(--space-2xl) 2rem;
  background-color: var(--color-ink);
  color: var(--color-ecru);
}

.footer__inner {
  max-width: var(--site-width);
  margin: 0 auto;
}

.footer__top {
  text-align: center;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(245, 241, 232, 0.1);
}

.footer__logo {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-ecru);
  margin-bottom: var(--space-sm);
}

.footer__logo:hover {
  color: var(--color-pale-beige);
}

.footer__tagline {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.05em;
  color: rgba(245, 241, 232, 0.5);
}

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

.footer__nav {
  display: flex;
  gap: 2rem;
}

.footer__nav-link {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: rgba(245, 241, 232, 0.6);
  transition: color var(--transition-base);
}

.footer__nav-link:hover {
  color: var(--color-ecru);
}

.footer__copyright {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: rgba(245, 241, 232, 0.35);
}

/* ----------------------------------------
   Media Queries — Tablet (768px)
   ---------------------------------------- */
@media screen and (max-width: 768px) {
  :root {
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }

  .header__inner {
    padding: 1rem 1.5rem;
  }

  .header__nav {
    display: none;
  }

  .header__menu-btn {
    display: flex;
  }

  .hero {
    height: 70vh;
    min-height: 400px;
    margin-top: 54px;
  }

  .hero__title {
    font-size: clamp(1.5rem, 5vw, 2.25rem);
  }

  .hero__content {
    padding: var(--space-lg) 1.5rem var(--space-xl);
  }

  .hero__meta {
    gap: 1rem;
    flex-wrap: wrap;
  }

  .article {
    padding: var(--space-xl) 1.5rem;
  }

  .article__figure {
    margin-left: -1.5rem;
    margin-right: -1.5rem;
  }

  .article__figure-caption {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .related {
    padding: var(--space-2xl) 1.5rem;
  }

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

  .related__card {
    display: flex;
    flex-direction: row;
  }

  .related__card-link {
    display: flex;
    flex-direction: row;
    width: 100%;
  }

  .related__card-image-wrapper {
    width: 40%;
    flex-shrink: 0;
    aspect-ratio: 1 / 1;
  }

  .related__card-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-md);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .footer__nav {
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
}

/* ----------------------------------------
   Media Queries — Mobile (480px)
   ---------------------------------------- */
@media screen and (max-width: 480px) {
  :root {
    --space-xl: 2.5rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
  }

  html {
    font-size: 15px;
  }

  .header__inner {
    padding: 0.875rem 1rem;
  }

  .header__logo {
    font-size: 1.1rem;
  }

  .hero {
    height: 60vh;
    min-height: 350px;
  }

  .hero__content {
    padding: var(--space-md) 1rem var(--space-lg);
  }

  .hero__title {
    font-size: 1.5rem;
    line-height: 1.6;
  }

  .hero__title br {
    display: none;
  }

  .hero__meta {
    gap: 0.75rem;
    margin-bottom: var(--space-sm);
  }

  .hero__category {
    font-size: 0.6875rem;
    padding: 0.2em 0.75em;
  }

  .hero__date,
  .hero__read-time {
    font-size: 0.75rem;
  }

  .article {
    padding: var(--space-lg) 1rem;
  }

  .toc {
    padding: var(--space-md);
  }

  .article__heading {
    font-size: 1.1875rem;
  }

  .article__text {
    font-size: 0.9375rem;
    line-height: 1.9;
    text-align: left;
  }

  .article__figure {
    margin-left: -1rem;
    margin-right: -1rem;
  }

  .article__figure-caption {
    padding-left: 1rem;
    padding-right: 1rem;
    font-size: 0.75rem;
  }

  .article__blockquote {
    padding: var(--space-md);
  }

  .article__blockquote p {
    font-size: 0.9375rem;
  }

  .article__map-inner {
    padding: var(--space-md);
  }

  .share__buttons {
    flex-direction: column;
    align-items: center;
  }

  .share__button {
    width: 100%;
    max-width: 280px;
  }

  .related {
    padding: var(--space-xl) 1rem;
  }

  .related__card-link {
    flex-direction: column;
  }

  .related__card-image-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .footer {
    padding: var(--space-xl) 1rem;
  }

  .footer__logo {
    font-size: 1.25rem;
  }

  .footer__nav {
    gap: 1rem;
  }

  .footer__nav-link {
    font-size: 0.75rem;
  }
}

/* ----------------------------------------
   Film Photography Aesthetic
   ---------------------------------------- */
.hero__image,
.article__figure-image,
.related__card-image {
  filter: saturate(0.8) contrast(1.05) brightness(0.98);
  transition: filter var(--transition-slow);
}

.article__figure:hover .article__figure-image {
  filter: saturate(0.9) contrast(1.02) brightness(1.0);
}

/* Grain overlay for hero */
.hero__image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: overlay;
}

/* ----------------------------------------
   Utility & Animation
   ---------------------------------------- */
.article__section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.article__section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Selection color */
::selection {
  background-color: var(--color-teal);
  color: var(--color-ecru);
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--color-ecru);
}

::-webkit-scrollbar-thumb {
  background: var(--color-pale-beige);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-ink-muted);
}