:root {
  --bg:        #f4f5f7;
  --surface:   #ffffff;
  --border:    #e3e5e9;
  --text:      #16181d;
  --muted:     #6b7280;
  --accent:    #3b5bfd;
  --accent-fg: #ffffff;
  --ok-bg:     #e7f6ec;
  --ok-fg:     #15633a;
  --err-bg:    #fdecec;
  --err-fg:    #9b1c1c;
  --radius:    14px;
  --shadow:    0 1px 2px rgba(16,18,29,.06), 0 8px 24px rgba(16,18,29,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #0f1115;
    --surface: #171a21;
    --border:  #262a33;
    --text:    #e9ebf0;
    --muted:   #9aa1af;
    --accent:  #6b84ff;
    --ok-bg:   #12301f;
    --ok-fg:   #7fe0a6;
    --err-bg:  #33161a;
    --err-fg:  #ff9ea4;
    --shadow:  0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

body {
  margin: 0;
  padding: 40px 16px 72px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1080px; margin: 0 auto; }

header { margin-bottom: 28px; }
header h1 { margin: 0 0 6px; font-size: 1.75rem; letter-spacing: -.02em; }
header p  { margin: 0; color: var(--muted); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------- upload area ---------- */

.uploader { padding: 22px; margin-bottom: 36px; }

.fields {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 14px;
  align-items: end;
}

@media (max-width: 720px) {
  .fields { grid-template-columns: 1fr; }
}

.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }

label {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--muted);
}

input[type="text"], input[type="file"] {
  width: 100%;
  padding: 11px 12px;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

input[type="file"]::file-selector-button {
  margin-right: 10px;
  padding: 6px 12px;
  font: inherit;
  font-size: .85rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
}

input:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button {
  padding: 11px 22px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-fg);
  background: var(--accent);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
}

button:hover { filter: brightness(1.08); }

.hint { margin: 14px 0 0; font-size: .82rem; color: var(--muted); }

/* ---------- flash message ---------- */

.flash {
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: .92rem;
  border-radius: 10px;
}
.flash.success { background: var(--ok-bg);  color: var(--ok-fg); }
.flash.error   { background: var(--err-bg); color: var(--err-fg); }

/* ---------- preview gallery ---------- */

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.section-head h2 { margin: 0; font-size: 1.1rem; letter-spacing: -.01em; }
.count { font-size: .85rem; color: var(--muted); }

/* ---------- search ---------- */

.search {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.search input[type="search"] {
  width: 220px;
  max-width: 48vw;
  padding: 8px 12px;
  font: inherit;
  font-size: .88rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.search input[type="search"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.search button {
  padding: 8px 16px;
  font-size: .88rem;
}

.search .clear {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.search .clear:hover { color: var(--text); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}

.tile { margin: 0; overflow: hidden; display: flex; flex-direction: column; }

.tile .frame {
  aspect-ratio: 4 / 3;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.tile img,
.tile iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

.tile img { object-fit: cover; }

.meta {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
}

.meta .text { min-width: 0; flex: 1; }

.meta .name {
  display: block;
  font-size: .92rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  overflow-wrap: anywhere;
}
.meta .name:hover { color: var(--accent); }

.meta .sub { margin-top: 3px; font-size: .78rem; color: var(--muted); }

.badge {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 7px;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(59, 91, 253, .12);
  border-radius: 999px;
}

/* ---------- delete ---------- */

.delete { flex-shrink: 0; margin: 0; }

.delete button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 9px;
}

.delete button:hover {
  color: var(--err-fg);
  background: var(--err-bg);
  border-color: transparent;
  filter: none;
}

.delete svg { width: 15px; height: 15px; }

.empty {
  padding: 56px 20px;
  text-align: center;
  color: var(--muted);
}

.empty a { color: var(--accent); }

/* ---------- header bar ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.topbar .titles { flex: 1; min-width: 0; }
.topbar h1 { margin: 0 0 6px; font-size: 1.75rem; letter-spacing: -.02em; }
.topbar p  { margin: 0; color: var(--muted); }

.session {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-size: .85rem;
  color: var(--muted);
}

.session strong { color: var(--text); font-weight: 600; }

.session button {
  padding: 7px 14px;
  font-size: .85rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
}

.session button:hover { color: var(--text); filter: none; }

@media (max-width: 560px) {
  .topbar { flex-wrap: wrap; }
  .session { width: 100%; }
}

/* ---------- login page ---------- */

.login-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 24px 16px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  padding: 32px 28px;
}

.login-card h1 {
  margin: 0 0 4px;
  font-size: 1.4rem;
  letter-spacing: -.02em;
}

.login-card .lede {
  margin: 0 0 24px;
  font-size: .9rem;
  color: var(--muted);
}

.login-card .field { margin-bottom: 16px; }

.login-card input[type="text"],
.login-card input[type="password"] {
  width: 100%;
  padding: 11px 12px;
  font: inherit;
  font-size: .95rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.login-card button {
  width: 100%;
  margin-top: 4px;
  padding: 12px;
}

.login-card .note {
  margin: 20px 0 0;
  padding-top: 16px;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--muted);
  border-top: 1px solid var(--border);
}