:root {
    --bg: #f4f6f8;
    --card: #ffffff;
    --border: #e2e6ea;
    --text: #1f2933;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-d: #1d4ed8;
    --danger: #dc2626;
    --ok-bg: #ecfdf5;
    --ok-bd: #34d399;
    --err-bg: #fef2f2;
    --err-bd: #f87171;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.wrap {
    max-width: 920px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

header.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

header.topbar h1 {
    font-size: 20px;
    margin: 0;
}

.user-box {
    font-size: 14px;
    color: var(--muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 24px;
}

.card h2 {
    font-size: 16px;
    margin: 0 0 14px;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    background: var(--primary);
    color: #fff;
    transition: background .15s ease;
}
.btn:hover { background: var(--primary-d); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-ghost { background: #fff; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { background: #f3f4f6; }
.btn-danger { background: #fff; color: var(--danger); border-color: #f1c4c4; }
.btn-danger:hover { background: var(--err-bg); }

/* Subida */
.upload-form { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
input[type="file"] {
    flex: 1 1 260px;
    padding: 10px;
    border: 1px dashed #c4ccd4;
    border-radius: 8px;
    background: #fafbfc;
    font-size: 14px;
}
.hint { color: var(--muted); font-size: 13px; margin: 10px 0 0; }

/* Mensajes */
.flash { border-radius: 8px; padding: 12px 14px; margin-bottom: 18px; font-size: 14px; }
.flash.ok  { background: var(--ok-bg);  border: 1px solid var(--ok-bd); }
.flash.error { background: var(--err-bg); border: 1px solid var(--err-bd); color: #991b1b; }
.flash.url { background: var(--ok-bg); border: 1px solid var(--ok-bd); }
.flash.url .url-row { display: flex; gap: 8px; margin-top: 8px; }

/* Campo URL + copiar */
.url-row { display: flex; gap: 8px; align-items: center; }
.url-row input {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    background: #fff;
    color: var(--text);
}

/* Listado */
.lista { display: grid; gap: 14px; }
.item {
    display: grid;
    grid-template-columns: 88px 1fr auto;
    gap: 14px;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    background: #fff;
}
.item .thumb {
    width: 88px;
    height: 66px;
    object-fit: cover;
    border-radius: 6px;
    background: #f0f2f4;
    border: 1px solid var(--border);
}
.item .meta { min-width: 0; }
.item .meta .fecha { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.item .acciones { display: flex; flex-direction: column; gap: 8px; }
.badge-caduca { font-size: 12px; color: var(--muted); }

.vacio { color: var(--muted); text-align: center; padding: 28px 0; }

/* Login */
.login-wrap {
    max-width: 380px;
    margin: 8vh auto 0;
    padding: 0 16px;
}
.login-wrap .card { padding: 28px; }
.login-wrap h1 { font-size: 20px; margin: 0 0 4px; text-align: center; }
.login-wrap .sub { text-align: center; color: var(--muted); font-size: 14px; margin: 0 0 22px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
}
.login-wrap .btn { width: 100%; justify-content: center; }

@media (max-width: 560px) {
    .item { grid-template-columns: 64px 1fr; }
    .item .thumb { width: 64px; height: 48px; }
    .item .acciones { grid-column: 1 / -1; flex-direction: row; }
}