/* ========================================
   Personal Website — himatt-inspired
   ======================================== */

:root {
  --color-bg: #f6fef9;
  --color-dark: #003114;
  --color-text: #003114;
  --color-text-secondary: #4a6a52;
  --color-text-light: #f5fff9;
  --color-text-light-secondary: #b0d4ba;
  --color-border: #c8e0ce;
  --color-card-bg: #003114;
  --color-card-bg-hover: #00401a;
  --color-surface: #eaf7ef;
  --color-nav-bg: #f6fef9;
  --font-display: 'Unbounded', sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --max-width: 800px;
  --max-width-wide: 1040px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

body > main {
  flex: 1;
}

a {
  color: var(--color-text);
  text-decoration: none;
  border-bottom: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.7;
}

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

/* ---- Typography ---- */
h1 {
  font-family: var(--font-display);
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p {
  margin-bottom: var(--spacing-sm);
}

small, .text-secondary {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* ---- Layout ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container--wide {
  max-width: var(--max-width-wide);
}

/* ---- Navigation ---- */
.nav {
  position: sticky;
  top: 0;
  background: var(--color-nav-bg);
  z-index: 100;
  padding: var(--spacing-sm) 0;
}

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

.nav__logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.nav__logo:hover {
  opacity: 0.7;
}

.nav__links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav__links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-text);
  opacity: 1;
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  margin: 4px 0;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ---- Hero (Home page) ---- */
.hero {
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
  font-size: 3.5rem;
}

.hero__tagline {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  max-width: 520px;
  line-height: 1.7;
}

.hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.hero__links a {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  transition: all 0.2s;
}

.hero__links a:hover {
  background: var(--color-dark);
  color: var(--color-text-light);
  border-color: var(--color-dark);
  opacity: 1;
}

.hero__links a.btn-primary {
  background: var(--color-dark);
  color: var(--color-text-light);
  border-color: var(--color-dark);
}

.hero__links a.btn-primary:hover {
  background: var(--color-card-bg-hover);
  border-color: var(--color-card-bg-hover);
}

/* ---- Section Nav (Home page) ---- */
.sections {
  padding: var(--spacing-lg) 0;
}

.sections__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.sections__item {
  padding: var(--spacing-md) 1.75rem;
  background: var(--color-card-bg);
  color: var(--color-text-light);
  border-radius: var(--radius-lg);
  transition: background 0.2s;
  display: block;
  border: none;
}

.sections__item:hover {
  background: var(--color-card-bg-hover);
  opacity: 1;
}

.sections__item h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-light);
}

.sections__item p {
  color: var(--color-text-light-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* ---- Page Header ---- */
.page-header {
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.page-header h1 {
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--color-text-secondary);
  margin-bottom: 0;
  font-size: 1.05rem;
}

/* ---- Filter Bar ---- */
.filter-bar {
  margin-bottom: var(--spacing-md);
}

.filter-search {
  width: 100%;
  padding: 0.65rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text);
  outline: none;
  margin-bottom: var(--spacing-sm);
  transition: border-color 0.2s;
}

.filter-search:focus {
  border-color: var(--color-dark);
}

.filter-dropdown {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.filter-dropdown__toggle {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-dropdown__toggle:hover {
  border-color: var(--color-dark);
}

.filter-dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.375rem;
  min-width: 200px;
  max-height: 260px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 16px rgba(0, 49, 20, 0.08);
  z-index: 50;
}

.filter-dropdown__menu.open {
  display: block;
}

.filter-dropdown__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.1s;
}

.filter-dropdown__item:hover {
  background: var(--color-surface);
}

.filter-dropdown__item input[type="checkbox"] {
  accent-color: var(--color-dark);
}

.filter-active-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.filter-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  padding: 0.25rem 0.625rem;
  background: var(--color-dark);
  color: var(--color-text-light);
  border-radius: 100px;
}

.filter-badge button {
  background: none;
  border: none;
  color: var(--color-text-light);
  cursor: pointer;
  font-size: 0.875rem;
  padding: 0;
  line-height: 1;
  opacity: 0.7;
}

.filter-badge button:hover {
  opacity: 1;
}

.filter-empty {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  padding: var(--spacing-md) 0;
}

/* ---- Cards (Work & Projects) ---- */
.card-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding-bottom: var(--spacing-xl);
}

.card {
  padding: 1.75rem 2rem;
  background: var(--color-card-bg);
  color: var(--color-text-light);
  border: none;
  border-radius: var(--radius-lg);
  transition: background 0.2s;
}

.card:hover {
  background: var(--color-card-bg-hover);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.card__title {
  margin-bottom: 0.25rem;
  color: var(--color-text-light);
}

.card__year {
  font-size: 0.8125rem;
  color: var(--color-text-light-secondary);
  white-space: nowrap;
}

.card__status {
  font-size: 0.7rem;
  color: #fff;
  background: #22c55e;
  padding: 0.175rem 0.6rem;
  border-radius: 100px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-light-secondary);
  margin-bottom: var(--spacing-sm);
}

.card__description {
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-light-secondary);
  line-height: 1.65;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: var(--spacing-sm);
}

.card__tag {
  font-size: 0.7rem;
  color: var(--color-text-light);
  background: rgba(255, 255, 255, 0.1);
  padding: 0.175rem 0.6rem;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  letter-spacing: 0.01em;
}

.card__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.card__link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-text-light);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 1px;
}

.card__link:hover {
  border-bottom-color: var(--color-text-light);
  opacity: 1;
}

/* ---- Writings ---- */
.writing-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: var(--spacing-md);
}

.writing-filters .filter-search {
  margin-right: 0.25rem;
}

.writing-filter {
  font-size: 0.8125rem;
  padding: 0.375rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.writing-filter:hover {
  border-color: var(--color-dark);
  color: var(--color-text);
}

.writing-filter.active {
  background: var(--color-dark);
  color: var(--color-text-light);
  border-color: var(--color-dark);
}

.writing-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-bottom: var(--spacing-xl);
}

.writing-item {
  display: block;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: opacity 0.2s;
}

.writing-item:last-child {
  border-bottom: none;
}

.writing-item:hover {
  opacity: 1;
}

.writing-item__meta {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: var(--spacing-xs);
}

.writing-item__date {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.writing-item__type {
  font-size: 0.7rem;
  color: var(--color-text-light);
  background: var(--color-dark);
  padding: 0.125rem 0.55rem;
  border-radius: 100px;
  letter-spacing: 0.01em;
}

.writing-item__title {
  margin-bottom: var(--spacing-sm);
}

.writing-item__excerpt {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  font-style: italic;
  line-height: 1.8;
}

.writing-item__read {
  display: inline-block;
  margin-top: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.writing-item:hover .writing-item__read {
  color: var(--color-text);
}

/* ---- Writing Page ---- */
.writing-page {
  max-width: 640px;
  padding: var(--spacing-lg) 0 var(--spacing-xl);
}

.writing-page__header {
  margin-bottom: var(--spacing-lg);
}

.writing-page__header h1 {
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.writing-page__date {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.writing-page__body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text-secondary);
}

.writing-page__body p {
  margin-bottom: var(--spacing-md);
}

.writing-page__body em {
  font-style: italic;
}

/* ---- Albums ---- */
.albums {
  padding-bottom: var(--spacing-xl);
}

.albums__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.album-cover {
  cursor: pointer;
  transition: transform 0.2s;
}

.album-cover:hover {
  transform: translateY(-2px);
}

.album-cover__img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-card-bg);
  position: relative;
  margin-bottom: 0.75rem;
}

.album-cover__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.album-cover__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light-secondary);
  font-size: 0.8125rem;
}

.album-cover__img img + .album-cover__placeholder {
  display: none;
}

.album-cover__title {
  margin-bottom: 0.25rem;
}

.album-cover__desc {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Expanded album view */
.album-expanded__back {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  padding: 0.45rem 1.1rem;
  cursor: pointer;
  margin-bottom: var(--spacing-md);
  transition: all 0.2s;
}

.album-expanded__back:hover {
  background: var(--color-dark);
  color: var(--color-text-light);
  border-color: var(--color-dark);
}

.album-expanded__title {
  margin-bottom: 0.5rem;
}

.album-expanded__desc {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
}

/* ---- Photo Gallery Grid ---- */
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xs);
}

.gallery__item {
  aspect-ratio: 1;
  overflow: hidden;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  position: relative;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.gallery__item:hover img {
  transform: scale(1.03);
}

.gallery__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
}

.gallery__item img + .gallery__placeholder {
  display: none;
}

/* ---- Lightbox ---- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 49, 20, 0.92);
  z-index: 200;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--color-text-light);
  font-size: 1.75rem;
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lightbox__close:hover {
  opacity: 1;
}

/* ---- Loading Indicator ---- */
.loader {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) 0;
}

.loader__spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-dark);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  margin-top: var(--spacing-lg);
}

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

.footer__text {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.footer__links {
  display: flex;
  gap: var(--spacing-sm);
}

.footer__links a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.footer__links a:hover {
  color: var(--color-text);
  opacity: 1;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  h1 {
    font-size: 2rem;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .nav__links.open {
    display: flex;
  }

  .nav__toggle {
    display: block;
  }

  .nav {
    position: relative;
  }

  .sections__grid {
    grid-template-columns: 1fr;
  }

  .albums__grid {
    grid-template-columns: 1fr;
  }

  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card {
    padding: 1.5rem;
  }

  .footer .container {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}