* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: system-ui, -apple-system, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    line-height: 1.5;
}

.screen.hidden { display: none !important; }

#app-screen:not(.hidden) {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding-bottom: calc(4.25rem + env(safe-area-inset-bottom));
}

.app-top {
    padding: 0.85rem 1rem 0.35rem;
    position: sticky;
    top: 0;
    z-index: 20;
    background: linear-gradient(180deg, #0f172a 70%, rgba(15, 23, 42, 0));
}

.app-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.app-top h1 {
    margin: 0;
    font-size: 1.25rem;
}

.session-card {
    margin-top: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: 0.9rem;
    background: #1e293b;
    border: 1px solid #334155;
    display: grid;
    gap: 0.45rem;
}

.session-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.75rem;
}

.session-label {
    color: #94a3b8;
    font-size: 0.8rem;
}

.session-row strong {
    font-size: 0.95rem;
    font-weight: 600;
    text-align: right;
}

.muted { color: #94a3b8; font-size: 0.9rem; }
.muted.compact { margin: 0.35rem 0 0; font-size: 0.8rem; }
.hint { color: #64748b; font-size: 0.85rem; padding: 0 1rem 1rem; }

.menu { position: relative; }

.icon-btn {
    border: 0;
    background: #1e293b;
    color: #e2e8f0;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: 999px;
    display: grid;
    place-items: center;
    cursor: pointer;
}

.menu-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 0.35rem);
    min-width: 10.5rem;
    padding: 0.35rem;
    border-radius: 0.85rem;
    background: #1e293b;
    border: 1px solid #334155;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
    z-index: 30;
}

.menu-panel.hidden { display: none; }

.menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    border: 0;
    background: transparent;
    color: #e2e8f0;
    padding: 0.7rem 0.75rem;
    border-radius: 0.65rem;
    font: inherit;
    cursor: pointer;
    text-align: left;
}

.menu-item:hover,
.menu-item:focus-visible {
    background: #334155;
}

.menu-item.danger { color: #fda4af; }

.app-main {
    flex: 1;
    padding: 0.25rem 0 0.5rem;
}

.panel { display: none; padding: 0 1rem 1rem; }
.panel.active { display: block; }

.subtabs {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    padding: 0.15rem 0 0.55rem;
    -webkit-overflow-scrolling: touch;
}

.subtab {
    flex: 0 0 auto;
    border: 0;
    border-radius: 999px;
    padding: 0.4rem 0.85rem;
    background: #1e293b;
    color: #94a3b8;
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

.subtab.active {
    background: #0284c7;
    color: #fff;
}

.user-tabs:empty { display: none; }

.toolbar { margin-bottom: 0.75rem; }

.card {
    background: #1e293b;
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.list .item { margin-bottom: 0.75rem; }

.item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.badge {
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
    border-radius: 999px;
    background: #334155;
}

.badge.pending { background: #b45309; color: #fff; }
.badge.login { background: #0369a1; color: #fff; }
.badge.download { background: #7c3aed; color: #fff; }
.badge.upload { background: #0f766e; color: #fff; }
.badge.status { background: #475569; color: #e2e8f0; }

.meta { margin: 0.25rem 0; font-size: 0.9rem; color: #94a3b8; }

.actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 25;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.25rem;
    padding: 0.35rem 0.5rem calc(0.35rem + env(safe-area-inset-bottom));
    background: #0b1220;
    border-top: 1px solid #1e293b;
}

.mail-view.hidden { display: none !important; }
.mail-detail {
    white-space: pre-wrap;
    word-break: break-word;
}
.mail-detail .mail-meta {
    color: #94a3b8;
    font-size: 0.85rem;
    margin: 0.25rem 0;
}
.mail-item.unread strong { color: #f8fafc; }
.compact-card { margin-bottom: 0.75rem; }

.nav-item {
    border: 0;
    background: transparent;
    color: #94a3b8;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    padding: 0.45rem 0.25rem;
    border-radius: 0.75rem;
    font: inherit;
    font-size: 0.72rem;
    cursor: pointer;
}

.nav-item.active {
    color: #38bdf8;
    background: rgba(2, 132, 199, 0.12);
}

.login-modes {
    display: flex;
    gap: 0.35rem;
    padding: 0 1rem 0.75rem;
}

.login-mode {
    flex: 1;
    border: 0;
    border-radius: 0.5rem;
    padding: 0.55rem 0.4rem;
    background: #1e293b;
    color: #cbd5e1;
    font: inherit;
    cursor: pointer;
}

.login-mode.active {
    background: #0284c7;
    color: #fff;
}

.login-panel.hidden { display: none; }

.header {
    padding: 1rem 1rem 0.5rem;
}

.header h1 {
    margin: 0;
    font-size: 1.35rem;
}

.qr-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 232px;
    height: 232px;
    margin: 0.75rem auto;
    padding: 16px;
    background: #fff;
    border-radius: 0.75rem;
    box-sizing: content-box;
}

.qr-box canvas {
    display: block;
    width: 200px;
    height: 200px;
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    word-break: break-all;
    font-size: 0.85rem;
}

.btn {
    border: 0;
    border-radius: 0.5rem;
    padding: 0.55rem 0.85rem;
    font: inherit;
    cursor: pointer;
}

.btn.primary { background: #0284c7; color: #fff; }
.btn.secondary { background: #334155; color: #e2e8f0; }
.btn.success { background: #059669; color: #fff; flex: 1; }
.btn.danger { background: #dc2626; color: #fff; flex: 1; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.error-text {
    color: #fecaca;
    font-size: 0.9rem;
    margin-top: 0.75rem;
}

.error-text.hidden { display: none; }

.form label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.form input {
    display: block;
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.6rem 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid #334155;
    background: #0f172a;
    color: #f8fafc;
    font: inherit;
}

.diagnostics {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    font-size: 0.9rem;
}

.diagnostics li { padding: 0.2rem 0; }

.empty {
    text-align: center;
    color: #64748b;
    padding: 2rem 1rem;
}

.error-banner {
    background: #7f1d1d;
    color: #fecaca;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 1rem;
    background: rgba(2, 6, 23, 0.72);
}

.modal.hidden { display: none; }

.modal-card {
    width: min(100%, 28rem);
    max-height: 90vh;
    overflow: auto;
    border-radius: 1rem 1rem 0.75rem 0.75rem;
    background: #0f172a;
    border: 1px solid #334155;
    padding: 1rem;
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.modal-head h2 {
    margin: 0;
    font-size: 1.1rem;
}

#qr-reader {
    overflow: hidden;
    border-radius: 0.75rem;
    background: #020617;
}

#qr-reader video {
    border-radius: 0.75rem;
}