/* =====================================================
   STYLE.CSS — OPTIMIZED VERSION
===================================================== */

:root {
  --image-spacing: 10px;
  --calendar-day-gap: 7px;
  --calendar-line-height: 2.4;
  --sidebar-padding-top: 9px;
  --sidebar-padding-bottom: 15px;
  --sidebar-padding-right: 20px;
  --sticky-gap: 12px;
  --header-h: 42px;
}

/* ===============================
   GLOBAL BASE
================================ */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 13px;
  color: black;
  background: white;
  text-rendering: optimizeSpeed;
}

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

/* ===============================
   HEADER
================================ */

.site-header {
  display: flex;
  justify-content: space-between;
  padding: 10px 25px;
  border-bottom: 1px solid black;
  position: relative;
  background: white;
  will-change: transform;
}

.header-left a {
  font-weight: bold;
  margin-left: 3px;
}

.header-right a {
  margin-left: 15px;
  white-space: nowrap;
}

.site-header a.active {
  color: red;
}

/* ===== GALLERY IMAGE BEHAVIOR ===== */

.gallery-image {
display: block;
width: 100%;
margin-bottom: var(--image-spacing);
opacity: 1;
transition: opacity 0.1s ease;
}


/* ===============================
   PORTFOLIO & DIARY CONTAINERS
================================ */

body[data-page="portfolio"] .sidebar,
body[data-page="diary"] .calendar {
  position: sticky;
  top: var(--header-h);
  will-change: transform;
}

body[data-page="portfolio"] .portfolio-container {
  display: flex;
  align-items: flex-start;
  width: 100%;
}

body[data-page="portfolio"] .sidebar {
  padding:
    var(--sidebar-padding-top)
    var(--sidebar-padding-right)
    var(--sidebar-padding-bottom)
    29px;
  width: max-content;
  min-width: max-content;
}

body[data-page="portfolio"] .project-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

body[data-page="portfolio"] .project-list a {
  font-weight: normal;
  white-space: nowrap;
  color: black;
}

body[data-page="portfolio"] .project-list a.active {
  color: red;
}

body[data-page="portfolio"] .portfolio-gallery {
  padding-top: 17px; /* ========padding betw header line and first image===== */
  padding-right: 20px;
  flex: 1 1 auto;
}

body[data-page="portfolio"] #gallery-title {
  display: none;
}

/* ===============================
   DIARY
================================ */

body[data-page="diary"] .diary-container {
  display: grid;
  grid-template-columns: max-content 1fr;
  align-items: start;
}

body[data-page="diary"] .calendar {
  padding:
    var(--sidebar-padding-top)
    57px
    var(--sidebar-padding-bottom)
    28px;
  width: max-content;
  min-width: max-content;
}

.calendar-header {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-bottom: 6px;
}

.cal-arrow {
  width: 13px;
  font-size: 12px;
  text-align: center;
  opacity: 0.7;
  cursor: pointer;
}

.cal-arrow:hover { opacity: 1; }
.cal-arrow.disabled { opacity: 0.3; cursor: default; }

.cal-month {
  font-weight: bold;
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: lowercase;
  margin: 0 8px;
  white-space: nowrap;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(9, 13px);
  gap: var(--calendar-day-gap);
}

.cal-day {
  font-size: 13px;
  line-height: var(--calendar-line-height);
  text-align: center;
}

.cal-day.active {
  color: red;
  font-weight: bold;
}

.cal-day.empty {
  visibility: hidden;
}

/* ===============================
   GALLERY IMAGES
================================ */

body[data-page="diary"] .diary-main {
  padding-top: 20px;
  padding-right: 20px;
}

.gallery-image {
  display: block;
  width: 100%;
  margin-bottom: var(--image-spacing);

  /* Performance: Skips rendering off-screen images */
  content-visibility: auto;
  contain-intrinsic-size: auto 666px;



/* ===============================
   PERFORMANCE
================================ */

#loading-text {
  font-size: 12px;
  opacity: 0.6;
  margin-top: 10px;
}