:root {
  --accent-1: #2f6f62;   /* deep teal — primary interactive accent */
  --accent-1-dark: #235349;
  --accent-2: #1f3a5f;   /* navy — secondary accent, active nav */
  --gold: #c08a2e;       /* used sparingly: warnings, small highlights */
  --ink: #1b2430;
  --ink-soft: #5b6472;
  --ink-faint: #889098;
  --line: #e2e5ea;
  --line-soft: #eef0f3;
  --danger: #b3261e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  color: var(--ink);
  background: #fff;
}

/* ---------- Brand ---------- */
.brand-my { color: var(--ink-soft); font-weight: 400; }
.brand-space {
  font-weight: 700;
  color: var(--accent-1);
  letter-spacing: .1px;
}
.brand-mark-sm { width: 28px; height: 28px; flex-shrink: 0; }
.brand-mark-lg { width: 52px; height: 52px; margin: 0 auto 14px; }
.brand-mark-lg svg, .brand-mark-sm svg { display: block; width: 100%; height: 100%; }
.mi { display: inline-block; width: 18px; text-align: center; }

/* ---------- Login screen ---------- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f4f6f8;
}
.login-card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(20,30,45,.06), 0 12px 32px rgba(20,30,45,.08);
  padding: 44px 40px;
  width: 360px;
  text-align: center;
}
.login-card h1 { margin: 0; font-size: 24px; letter-spacing: .1px; font-weight: 500; }
.login-card .tagline { color: var(--ink-faint); font-size: 13px; margin: 6px 0 26px; }
.login-card .sub { color: var(--ink-soft); font-size: 13px; margin: 0 0 22px; padding-top: 18px; border-top: 1px solid var(--line-soft); }
.login-card form { text-align: left; }
.login-card label { display: block; font-size: 12.5px; font-weight: 500; color: var(--ink-soft); margin: 14px 0 5px; }
.login-card input {
  width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 10px; font-size: 14px;
  transition: border-color .15s, box-shadow .15s; background: #fbfbfd;
}
.login-card input:focus { outline: none; border-color: var(--accent-1); box-shadow: 0 0 0 3px rgba(47,111,98,.14); background: #fff; }
.google-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 11px; border: 1px solid var(--line); border-radius: 10px;
  background: #fff; color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: background .12s, border-color .12s, box-shadow .12s;
}
.google-btn:hover { background: #fafbfc; border-color: var(--ink-faint); box-shadow: 0 1px 3px rgba(20,30,45,.08); }
.divider { display: flex; align-items: center; gap: 12px; margin: 20px 0 4px; color: var(--ink-faint); font-size: 12px; }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--line-soft); }
.login-card button {
  width: 100%; margin-top: 22px; padding: 12px; background: var(--accent-2); color: #fff;
  border: none; border-radius: 10px; font-size: 15px; font-weight: 500; cursor: pointer;
  transition: background .15s;
}
.login-card button:hover { background: #16293f; }
.login-error { background: #fbeae9; color: var(--danger); padding: 9px 13px; border-radius: 8px; font-size: 13px; margin-top: 16px; text-align: left; }

/* ---------- App shell ---------- */
#app { display: flex; flex-direction: column; height: 100vh; }

.topbar {
  display: flex; align-items: center; height: 64px; padding: 0 16px;
  gap: 24px; flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(20,30,45,.04);
  border-bottom: 1px solid var(--line-soft);
}
.topbar-left { display: flex; align-items: center; gap: 10px; min-width: 180px; }
.brand { font-size: 19px; letter-spacing: .1px; }
.topbar-search {
  flex: 1; max-width: 720px; background: #f1f3f6; border-radius: 24px;
  display: flex; align-items: center; padding: 0 16px; height: 44px;
  border: 1px solid transparent; transition: background .15s, border-color .15s, box-shadow .15s;
}
.topbar-search:focus-within {
  background: #fff; border-color: var(--accent-1); box-shadow: 0 1px 3px rgba(20,30,45,.08), 0 0 0 3px rgba(47,111,98,.12);
}
.search-icon { opacity: .55; margin-right: 10px; }
.topbar-search input { flex: 1; border: none; background: transparent; outline: none; font-size: 14.5px; color: var(--ink); }
.topbar-right { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.username {
  font-size: 13px; color: var(--ink-soft); background: var(--line-soft);
  padding: 5px 12px; border-radius: 14px;
}
.logout-btn {
  font-size: 13px; color: var(--accent-1); text-decoration: none; border: 1px solid var(--line);
  padding: 7px 15px; border-radius: 18px; font-weight: 500; transition: background .15s, border-color .15s;
}
.logout-btn:hover { background: #f1f3f4; border-color: var(--ink-faint); }

.body-wrap { display: flex; flex: 1; min-height: 0; }

.sidebar {
  width: 248px; flex-shrink: 0; padding: 18px 8px; display: flex; flex-direction: column;
  border-right: 1px solid var(--line-soft); background: #fbfbfd;
}
.new-btn-wrap { position: relative; padding: 0 8px 22px; }
.new-btn {
  display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--line);
  border-radius: 24px; box-shadow: 0 1px 2px rgba(20,30,60,.06); padding: 12px 22px;
  font-size: 14px; font-weight: 500; color: var(--ink); cursor: pointer;
  transition: box-shadow .15s, transform .1s;
}
.new-btn:hover { box-shadow: 0 4px 12px rgba(20,30,60,.12); transform: translateY(-1px); }
.new-btn:active { transform: translateY(0); }
.new-btn .plus {
  font-size: 16px; font-weight: 700; color: #fff; width: 20px; height: 20px; line-height: 20px;
  text-align: center; border-radius: 50%; background: var(--accent-1); flex-shrink: 0;
}
.new-menu {
  position: absolute; top: 56px; left: 8px; background: #fff; border-radius: 10px; border: 1px solid var(--line-soft);
  box-shadow: 0 8px 24px rgba(20,30,60,.14); min-width: 200px; z-index: 50; overflow: hidden; padding: 6px;
}
.new-menu-item { padding: 10px 14px; font-size: 14px; cursor: pointer; border-radius: 8px; display: flex; align-items: center; gap: 10px; }
.new-menu-item:hover { background: var(--line-soft); }

.side-nav { display: flex; flex-direction: column; gap: 2px; padding: 0 4px; }
.side-item {
  padding: 10px 16px; font-size: 14px; border-radius: 20px; cursor: pointer; color: #3c4043;
  display: flex; align-items: center; gap: 10px; transition: background .12s, color .12s;
}
.side-item:hover { background: var(--line-soft); }
.side-item.active { background: var(--accent-2); color: #fff; font-weight: 500; }
.side-item.dragover { outline: 2px dashed var(--accent-1); outline-offset: -2px; }

.storage-box { margin-top: auto; padding: 18px 20px 6px; border-top: 1px solid var(--line-soft); }
.storage-link { display: block; text-decoration: none; border-radius: 8px; margin: -6px; padding: 6px; transition: background .12s; }
.storage-link:hover { background: var(--line-soft); }
.storage-bar { height: 5px; background: var(--line-soft); border-radius: 3px; overflow: hidden; }
.storage-fill { height: 100%; background: var(--accent-1); width: 0%; transition: width .3s; border-radius: 3px; }
.storage-fill-warn { background: var(--gold); }
.storage-text { font-size: 12px; color: var(--ink-soft); margin-top: 9px; }

.content { flex: 1; padding: 22px 32px; overflow-y: auto; position: relative; }
.breadcrumb { font-size: 19px; color: var(--ink-soft); margin-bottom: 22px; display: flex; align-items: center; flex-wrap: wrap; }
.breadcrumb .crumb { cursor: pointer; padding: 5px 10px; border-radius: 8px; transition: background .12s; }
.breadcrumb .crumb:hover { background: var(--line-soft); }
.breadcrumb .sep { margin: 0 2px; color: var(--ink-faint); }
.breadcrumb .crumb.current { color: var(--ink); font-weight: 500; cursor: default; }
.breadcrumb .crumb.current:hover { background: none; }

.trash-actions { margin-bottom: 18px; }
.secondary-btn {
  background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 8px 18px;
  font-size: 13px; font-weight: 500; color: var(--ink); cursor: pointer; transition: background .12s, border-color .12s;
}
.secondary-btn:hover { background: var(--line-soft); border-color: var(--ink-faint); }

.item-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 16px;
}
.item-card {
  border: 1px solid var(--line); border-radius: 12px; padding: 16px 14px; cursor: pointer;
  user-select: none; transition: box-shadow .15s, transform .1s, border-color .15s; position: relative;
  background: #fff;
}
.item-card:hover { box-shadow: 0 6px 18px rgba(20,30,60,.10); transform: translateY(-2px); border-color: var(--line-soft); }
.item-card.selected { background: #eaf2f0; border-color: var(--accent-1); }
.item-card.dragover { background: #eaf2f0; outline: 2px dashed var(--accent-1); outline-offset: -2px; }
.item-icon { font-size: 32px; text-align: center; margin-bottom: 10px; }
.item-thumb { width: 100%; height: 68px; object-fit: cover; border-radius: 8px; margin-bottom: 10px; border: 1px solid var(--line-soft); }
.item-name {
  font-size: 13px; text-align: center; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; color: var(--ink); font-weight: 500;
}
.item-meta { font-size: 11px; text-align: center; color: var(--ink-faint); margin-top: 4px; }
.item-menu-btn {
  position: absolute; top: 8px; right: 8px; border: none; background: #fff;
  font-size: 15px; cursor: pointer; padding: 4px 8px; border-radius: 50%; opacity: 0;
  box-shadow: 0 1px 3px rgba(20,30,60,.15); transition: opacity .12s, background .12s;
}
.item-card:hover .item-menu-btn { opacity: 1; }
.item-menu-btn:hover { background: var(--line-soft); }

.empty-state { text-align: center; margin-top: 90px; color: var(--ink-faint); font-size: 14px; }
.empty-icon {
  font-size: 34px; width: 72px; height: 72px; line-height: 72px; margin: 0 auto 16px;
  border-radius: 50%; background: var(--line-soft);
}

.dropzone-overlay {
  position: absolute; inset: 0; background: rgba(47,111,98,.06); border: 2px dashed var(--accent-1);
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
  z-index: 40; pointer-events: none;
}
.dropzone-msg { font-size: 19px; color: var(--accent-1); font-weight: 500; }

.context-menu {
  position: fixed; background: #fff; border-radius: 10px; box-shadow: 0 8px 28px rgba(20,30,60,.20);
  border: 1px solid var(--line-soft); min-width: 180px; z-index: 100; overflow: hidden; padding: 6px;
}
.context-menu-item { padding: 10px 14px; font-size: 14px; cursor: pointer; border-radius: 8px; }
.context-menu-item:hover { background: var(--line-soft); }
.context-menu-item.danger { color: var(--danger); }
.context-menu-item.danger:hover { background: #fbeae9; }

.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  background: #202124; color: #fff; padding: 12px 24px; border-radius: 24px; font-size: 13.5px;
  z-index: 200; box-shadow: 0 8px 24px rgba(0,0,0,.28);
}

@media (max-width: 720px) {
  .sidebar { width: 76px; }
  .brand, .new-btn span:not(.plus), .side-item span:not(.mi) { display: none; }
  .username { display: none; }
  .side-item { justify-content: center; padding: 12px 4px; border-radius: 14px; }
  .new-btn { justify-content: center; padding: 12px; }
}