/* =========================
   Global Reset
========================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* =========================
   Color Variables
========================= */
:root {
  --color-bg-main: #212121;
  --color-bg-shell: #181818;
  --color-text-main: #ffffff;
  --color-text-muted: #cfcfcf;
  --color-footer-text: #9e9e9e;
}

/* =========================
   Body (Mobile First)
========================= */
body {
  min-height: 100vh;
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  font-family: 'Inter', sans-serif;

  display: flex;
  align-items: center;
  justify-content: center;

  padding-top: 4.5rem;   /* header space */
  padding-bottom: 1rem; /* footer space */
}

/* =========================
   Header
========================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;

  background-color: var(--color-bg-shell);
  color: var(--color-text-main);
  text-align: center;

  padding: 0.75rem 1rem;
  font-weight: 600;

  z-index: 1000;
}

/* Hamburger button */
.menu-toggle {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);

  background: none;
  border: none;
  color: var(--color-text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* =========================
   Mobile Menu Overlay
========================= */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: var(--color-bg-shell);
  color: var(--color-text-main);
  padding: 4rem 1.5rem 1.5rem;

  transform: translateY(-100%);
  transition: transform 0.3s ease;
  z-index: 999;

  overflow-y: auto; /* scroll if too tall */
}

.mobile-menu.open {
  transform: translateY(0);
}

.mobile-menu ul {
  list-style: none;
}

.mobile-menu li {
  margin-bottom: 1rem;
}

.mobile-menu a {
  color: var(--color-text-main);
  text-decoration: none;
  font-size: 1.25rem;
}

.mobile-menu ul ul {
  display: none;
  margin-left: 1rem;
  margin-top: 0.5rem;
}

li.open > ul {
  display: block;
}

.menu-parent {
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.menu-parent::after {
  content: "›";
  transform: rotate(90deg);
  transition: transform 0.2s ease;
}

li.open > .menu-parent::after {
  transform: rotate(-90deg);
}

/* =========================
   Article Preview Layout
========================= */
.article-preview {
  display: flex;
  flex-direction: column; /* stacked content always */
  background-color: var(--color-bg-shell);
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 2rem;
  gap: 1rem;
}

.article-header h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.article-date {
  font-size: 0.875rem;
  color: var(--color-footer-text);
  margin-bottom: 0.5rem;
  display: block;
}

.article-text p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.article-image img {
  width: 100%;
  height: auto;
  border-radius: 0.5rem;
}

.article-full {
  padding: 1rem 1.25rem;
}

.photolegend {
  text-align: center;
  font-size: 0.75rem;
}
/* =========================
   Footer
========================= */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;

  background-color: var(--color-bg-shell);
  color: var(--color-footer-text);
  text-align: center;

  padding: 0.75rem 1rem;
  font-size: 0.75rem;
}

/* =========================
   Archive Page
========================= */
.archive-page {
  display: block;
  text-align: left;
  margin: 0; /* we will handle spacing with padding */
  width: 100%;
  padding: 3rem 1rem 3rem 1rem; /* space below header + around content */
}

/* Archive list simple style */
.archive-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.archive-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
}

.archive-date {
  font-size: 0.875rem;
  color: var(--color-footer-text);
}

.archive-title {
  font-size: 1rem;
  color: var(--color-text-main);
  text-decoration: none;
}

.archive-title:hover {
  text-decoration: underline;
}

/* =========================
   Larger Screens (Tablet+)
========================= */
@media (min-width: 768px) {
  .container {
    padding: 2rem;
  }

  .site-footer {
    font-size: 0.875rem;
  }

  h1 {
    font-size: 2rem;
  }

  .article-image img {
    width: 80%;       /* make it 80% of container width */
    margin: 0 auto;   /* center image */
    display: block;
  }
}

/* =========================
   Desktop Sidebar Navigation
========================= */
@media (min-width: 1024px) {

  /* Hide hamburger button */
  .menu-toggle {
    display: none;
  }

  /* Sidebar menu */
  .mobile-menu {
    transform: translateY(0);
    top: 3rem;
    width: 260px;
    height: calc(100vh - 3rem);
    padding: 1.5rem 1rem;
    overflow-y: auto;
  }

  /* Shift main content for homepage/articles */
  .container:not(.archive-page) {
    margin-left: 260px;
    text-align: left;
  }

  body {
     padding-top: 3rem;
  }

  /* Archive page content spacing for sidebar */
  .archive-page {
    padding-left: 150px;  /* leave space for sidebar */
    padding-right: 2rem;
    padding-top: 3rem;    /* below header */
    padding-bottom: 3rem;
  }
}