@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;700&display=swap");

:root {
  --bg: #f5f4f7;
  --bg-grad-1: #f7f3fb;
  --bg-grad-2: #eef4f6;
  --card: #ffffff;
  --ink: #1c1a22;
  --sub: #8b8695;
  --border: #ebe8f0;
  --accent-1: #7c6cf0;
  --accent-2: #ff7a9c;
  --accent: #7c6cf0;
  --accent-ink: #ffffff;
  --done-bg: #f4f2f8;
  --shadow-sm: 0 1px 2px rgba(28, 26, 34, 0.04), 0 1px 1px rgba(28, 26, 34, 0.03);
  --shadow-md: 0 8px 24px rgba(28, 26, 34, 0.08), 0 2px 6px rgba(28, 26, 34, 0.04);
  --shadow-lg: 0 20px 48px rgba(28, 26, 34, 0.14), 0 4px 12px rgba(28, 26, 34, 0.06);
  --radius: 18px;
  --radius-sm: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131019;
    --bg-grad-1: #191426;
    --bg-grad-2: #14181e;
    --card: #1d1926;
    --ink: #f1eef7;
    --sub: #8f899c;
    --border: #2b2636;
    --accent-1: #8f7cff;
    --accent-2: #ff8bab;
    --accent: #8f7cff;
    --done-bg: #221d2e;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  background:
    radial-gradient(circle at 10% -10%, var(--bg-grad-1), transparent 55%),
    radial-gradient(circle at 90% 0%, var(--bg-grad-2), transparent 45%),
    var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

button, input, textarea {
  font-family: inherit;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: color-mix(in srgb, var(--bg) 75%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-size: 19px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logout-btn, .delete-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--sub);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 500;
  transition: transform 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.logout-btn:hover, .delete-btn:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.tabs {
  display: flex;
  gap: 6px;
  padding: 16px 24px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  flex: none;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 18px;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--sub);
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.tab-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.tab-btn.active {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-md);
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 24px 72px;
}

#add-form, #upload-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

#upload-form {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
}

#add-form input, #add-form textarea,
#upload-form input[type="text"], #upload-form input[type="file"] {
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink);
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#upload-form input[type="text"] {
  flex: 1;
  min-width: 150px;
}

#add-form input:focus, #add-form textarea:focus,
#upload-form input:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-1) 18%, transparent);
}

#add-form textarea {
  min-height: 64px;
}

#add-form button, #upload-form button, .new-album-btn {
  align-self: flex-end;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 22px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

#add-form button:hover, #upload-form button:hover, .new-album-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.05);
}

#add-form button:active, #upload-form button:active, .new-album-btn:active {
  transform: translateY(0);
}

#upload-status {
  width: 100%;
  font-size: 12.5px;
  color: var(--sub);
  margin: 0;
}

#entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.entry {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.entry:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.entry.done {
  background: var(--done-bg);
  box-shadow: none;
}

.entry.done .entry-title {
  text-decoration: line-through;
  color: var(--sub);
}

.entry-main {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex: 1;
}

.entry-main input[type="checkbox"] {
  margin-top: 3px;
  width: 19px;
  height: 19px;
  accent-color: var(--accent-1);
}

.entry-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.entry-content {
  font-size: 13px;
  color: var(--sub);
  margin-top: 4px;
  white-space: pre-wrap;
  line-height: 1.5;
}

.entry-meta {
  font-size: 11.5px;
  color: var(--sub);
  margin-top: 8px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.empty {
  text-align: center;
  color: var(--sub);
  font-size: 13.5px;
  padding: 56px 20px;
  list-style: none;
}

.hidden {
  display: none;
}

/* gallery */

#gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}

.gallery-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.gallery-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.gallery-item img, .gallery-item video {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
}

.gallery-caption {
  font-size: 12px;
  color: var(--sub);
  padding: 8px 10px;
}

.gallery-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  background: color-mix(in srgb, var(--card) 85%, transparent);
  backdrop-filter: blur(6px);
}

.gallery-header {
  margin-bottom: 18px;
}

#album-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 18px;
}

.album-card {
  cursor: pointer;
}

.album-cover {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--done-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.album-card:hover .album-cover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: var(--shadow-md);
}

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

.album-cover-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--sub);
  font-size: 12px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-1) 10%, var(--card)), color-mix(in srgb, var(--accent-2) 10%, var(--card)));
}

.album-info {
  padding: 10px 2px 0;
}

.album-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.album-count {
  font-size: 12px;
  color: var(--sub);
  margin-top: 2px;
}

.album-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.back-btn {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  color: var(--sub);
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 500;
  transition: transform 0.15s ease, color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.back-btn:hover {
  border-color: var(--accent-1);
  color: var(--accent-1);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

#album-detail-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
  flex: 1;
}

/* login */

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  background: color-mix(in srgb, var(--card) 88%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 44px 36px;
  width: 100%;
  max-width: 320px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.login-card h1 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 28px;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.login-card form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login-card input {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 14px;
  text-align: center;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.login-card input:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-1) 18%, transparent);
}

.login-card button {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.login-card button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.05);
}

.error {
  color: #ff5c7a;
  font-size: 12.5px;
  min-height: 18px;
  font-weight: 500;
}

/* lightbox */

.gallery-item img,
.gallery-item video {
  cursor: pointer;
}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 8, 14, 0.92);
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

#lightbox-content img,
#lightbox-content video {
  max-width: 92vw;
  max-height: 88vh;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  display: block;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}