* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: #121318;
    color: #e8e9ed;
}
button, input, select { font-family: inherit; }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }

.app-header {
    position: sticky; top: 0; z-index: 20;
    display: flex; align-items: center; gap: .75rem;
    padding: .75rem 1rem;
    padding-top: calc(.75rem + env(safe-area-inset-top));
    background: #1a1c24;
    border-bottom: 1px solid #2a2d38;
}
.app-title { font-weight: 600; flex: 1; }
.app-user { color: #9aa0ae; font-size: .9rem; }
.btn-link {
    background: none; border: none; color: #7aa2ff; cursor: pointer; font-size: .9rem; padding: .25rem .5rem;
}

.app-main { flex: 1; padding: .75rem 1rem 2rem; max-width: 1400px; width: 100%; margin: 0 auto; }

/* --- Toolbar / search --- */
.toolbar { margin-bottom: 1rem; }
.toolbar-row {
    display: flex; flex-wrap: wrap; gap: .6rem; align-items: end;
    background: #1a1c24; border: 1px solid #2a2d38; border-radius: 10px; padding: .75rem;
}
.tb-field {
    display: flex; flex-direction: column; gap: .25rem; font-size: .8rem; color: #9aa0ae;
}
.tb-field input, .tb-field select {
    background: #0f1015; border: 1px solid #333748; color: #e8e9ed;
    border-radius: 6px; padding: .4rem .5rem; font-size: .95rem;
}
.btn-primary, .btn-secondary {
    border-radius: 6px; padding: .5rem .9rem; font-size: .9rem; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: #4c6fff; color: white; border: none; width: 100%; margin-top: .25rem; }
.btn-secondary { background: #262a38; color: #e8e9ed; border: 1px solid #333748; }
.btn-secondary:disabled { opacity: .4; cursor: default; }

/* --- Groups --- */
.day-heading { font-size: 1.1rem; margin: 1.25rem 0 .4rem; border-bottom: 1px solid #2a2d38; padding-bottom: .3rem; }
.day-count { color: #6c7384; font-weight: 400; font-size: .85rem; }
.hour-heading { font-size: .85rem; color: #9aa0ae; margin: .6rem 0 .4rem; }

.thumb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 8px;
}
.thumb {
    position: relative; padding: 0; border: 1px solid #2a2d38; border-radius: 8px; overflow: hidden;
    background: #1a1c24; cursor: pointer; aspect-ratio: 16/10;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb-tag {
    position: absolute; left: 0; right: 0; bottom: 0;
    background: linear-gradient(transparent, rgba(0,0,0,.75));
    color: #fff; font-size: .65rem; padding: .3rem .4rem; text-align: left;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.empty-state { color: #6c7384; padding: 3rem 1rem; text-align: center; }

/* --- Lightbox --- */
.lightbox {
    position: fixed; inset: 0; background: rgba(0,0,0,.92); z-index: 50;
    display: flex; align-items: center; justify-content: center; padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}
.lightbox-inner { max-width: 96vw; max-height: 96vh; display: flex; flex-direction: column; align-items: center; }
.lightbox-inner img { max-width: 96vw; max-height: 82vh; object-fit: contain; border-radius: 6px; }
.lightbox-bar {
    width: 100%; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
    gap: .5rem; color: #cfd2db; font-size: .8rem; margin-top: .6rem; padding: 0 .25rem;
}
.lightbox-actions { display: flex; gap: .4rem; }

/* --- Login --- */
.auth-shell { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-card {
    background: #1a1c24; border: 1px solid #2a2d38; border-radius: 12px;
    padding: 2rem; width: 100%; max-width: 360px;
}
.login-card h1 { font-size: 1.3rem; margin: 0 0 .25rem; text-align: center; }
.login-sub { color: #9aa0ae; text-align: center; margin: 0 0 1.25rem; font-size: .9rem; }
.login-card form { display: flex; flex-direction: column; gap: .9rem; }
.login-card label { display: flex; flex-direction: column; gap: .3rem; font-size: .85rem; color: #9aa0ae; }
.login-card input {
    background: #0f1015; border: 1px solid #333748; color: #e8e9ed;
    border-radius: 6px; padding: .6rem .7rem; font-size: 1rem;
}
.login-error {
    background: #3a1f24; color: #ff9aa8; border: 1px solid #5a2530;
    border-radius: 6px; padding: .5rem .7rem; font-size: .85rem; margin-bottom: 1rem;
}

/* --- Small phones --- */
@media (max-width: 420px) {
    .thumb-grid { grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); }
    .app-main { padding: .6rem .6rem 2rem; }
}