:root {
    --bg: #0d0f14;
    --surface: #141720;
    --card: #1a1f2e;
    --border: #252b3b;
    --accent-blue: #3b82f6;
    --status-green: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --cyan: #06b6d4;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --text: #e2e8f0;
    --muted: #94a3b8;
}

html, body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at top, #141720 0%, #0d0f14 55%) fixed;
    color: var(--text);
}

h1, h2, h3, h4, h5, h6 {
    color: #f1f5f9;
}

a, .btn-link {
    color: var(--accent-blue);
    text-decoration: none;
}

a:hover, .btn-link:hover {
    color: #60a5fa;
}

.btn-primary {
    color: #fff;
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

.btn-primary:hover {
    background-color: #2f6fe0;
    border-color: #2f6fe0;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.1rem var(--bg), 0 0 0 0.25rem var(--accent-blue);
}

/* Inputs dark (login, registro, etc.) */
.form-control, .form-select {
    background-color: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
}

.form-control:focus, .form-select:focus {
    background-color: var(--surface);
    color: var(--text);
    border-color: var(--accent-blue);
}

.form-control::placeholder {
    color: var(--muted);
}

/* Marca y datos técnicos: callsign, frecuencias, hora UTC, MQTT */
.callsign {
    font-family: 'Share Tech Mono', ui-monospace, monospace;
    letter-spacing: 0.08em;
}

/* Tarjeta base del hub */
.card {
    background: rgba(26, 31, 46, 0.92);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
    color: var(--text);
}

/* Punto de estado (online) */
.status-dot {
    display: inline-block;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--status-green);
    box-shadow: 0 0 12px var(--status-green);
}

.content {
    padding-top: 1.1rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--status-green);
}

.invalid {
    outline: 1px solid var(--danger);
}

.validation-message {
    color: var(--danger);
}

.blazor-error-boundary {
    background: var(--danger);
    padding: 1rem;
    color: white;
    border-radius: 8px;
}

    .blazor-error-boundary::after {
        content: "Ocurrió un error.";
    }

.darker-border-checkbox.form-check-input {
    border-color: var(--border);
}

/* ===== Home / grid de módulos (Sprint 1) ===== */
.home {
    padding: 1.5rem 0;
}

    .home h1 {
        font-size: 2.2rem;
        margin-bottom: 0.3rem;
    }

        .home h1 span {
            color: var(--accent-blue);
        }

    .home .lead {
        font-size: 1.1rem;
        color: var(--text);
        margin-bottom: 1.8rem;
    }

    .home .note {
        color: var(--muted);
    }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 16px;
}

.mod-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-height: 124px;
    padding: 20px;
    border-radius: 16px;
    background: rgba(26, 31, 46, 0.92);
    border: 1px solid var(--border);
    border-top: 3px solid var(--accent, var(--accent-blue));
    color: var(--text);
    text-decoration: none;
    transition: transform .12s ease, border-color .12s ease;
}

    .mod-card:hover {
        transform: translateY(-2px);
        border-color: var(--accent, var(--accent-blue));
        color: var(--text);
    }

.mod-icon {
    font-size: 1.9rem;
    line-height: 1;
    color: var(--accent, var(--accent-blue));
}

.mod-name {
    font-size: 1.05rem;
    font-weight: 600;
}

.mod-badge {
    margin-top: auto;
    align-self: flex-start;
    font-size: 0.7rem;
    color: var(--muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 2px 8px;
}

.mod-card.soon {
    cursor: default;
    opacity: 0.85;
}

    .mod-card.soon:hover {
        transform: none;
        border-color: var(--border);
    }

/* ===== Admin · usuarios (Sprint 1) ===== */
.user-card {
    background: rgba(26, 31, 46, 0.92);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px;
    margin-bottom: 14px;
}

.user-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.user-name {
    font-weight: 600;
}

.user-mail {
    font-size: 0.8rem;
    color: var(--muted);
}

.mods {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.chk {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    color: var(--text);
    cursor: pointer;
}

.saved {
    display: inline-block;
    margin-top: 10px;
    font-size: 0.78rem;
    color: var(--status-green);
}

/* ===== Agenda (Sprint 4) ===== */
.ag-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin: 1.2rem 0; }
.ag-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ag-month { font-size: 1.05rem; color: var(--text); min-width: 140px; text-transform: capitalize; }
.btn-ico { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 12px; cursor: pointer; }
.btn-ico:hover { border-color: var(--accent-blue); }
.btn-nuevo { background: var(--accent-blue); border: 1px solid var(--accent-blue); color: #fff; border-radius: 8px; padding: 6px 14px; cursor: pointer; }
.btn-del { background: var(--danger); border: 1px solid var(--danger); color: #fff; border-radius: 8px; padding: 6px 14px; cursor: pointer; }
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.cal-dow { text-align: center; font-size: 0.8rem; color: var(--muted); padding: 4px 0; }
.cal-cell { min-height: 92px; background: rgba(26, 31, 46, 0.6); border: 1px solid var(--border); border-radius: 10px; padding: 6px; cursor: pointer; overflow: hidden; }
.cal-cell:hover { border-color: var(--accent-blue); }
.cal-cell.otro { opacity: 0.4; }
.cal-cell.hoy { border-color: var(--accent-blue); box-shadow: inset 0 0 0 1px var(--accent-blue); }
.cal-num { font-size: 0.8rem; color: var(--muted); }
.cal-ev { display: block; font-size: 0.72rem; color: #fff; border-radius: 5px; padding: 2px 6px; margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ag-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.55); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.ag-form { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 22px; width: min(440px, 92vw); display: flex; flex-direction: column; gap: 10px; }
.ag-form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--muted); }
.ag-form input, .ag-form textarea { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px; font-family: inherit; }
.ag-form .row2 { display: flex; gap: 10px; }
.ag-form .row2 label { flex: 1; }
.ag-form .chk { flex-direction: row; align-items: center; gap: 6px; color: var(--text); }
.ag-actions { display: flex; align-items: center; gap: 8px; margin-top: 6px; }

/* ===== Chat (Sprint 5) ===== */
.chat-layout { display: flex; gap: 14px; height: 72vh; margin-top: 1rem; }
.chat-side { width: 240px; flex-shrink: 0; background: rgba(26,31,46,0.6); border: 1px solid var(--border); border-radius: 14px; padding: 12px; overflow-y: auto; }
.chat-side-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.chat-conv { display: block; width: 100%; text-align: left; background: none; border: 1px solid transparent; color: var(--text); border-radius: 8px; padding: 9px 10px; margin-bottom: 4px; cursor: pointer; }
.chat-conv:hover { background: rgba(255,255,255,0.05); }
.chat-conv.activa { background: rgba(59,130,246,0.15); box-shadow: inset 3px 0 0 var(--accent-blue); }
.chat-nuevo { border: 1px solid var(--border); border-radius: 10px; padding: 8px; margin-bottom: 10px; }
.chat-nuevo-tit { font-size: 0.8rem; color: var(--muted); margin-bottom: 6px; }
.chat-user { display: block; width: 100%; text-align: left; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 7px 9px; margin-bottom: 4px; cursor: pointer; }
.chat-user:hover { border-color: var(--accent-blue); }
.chat-vacio { color: var(--muted); font-size: 0.85rem; padding: 8px; }
.chat-main { flex: 1; display: flex; flex-direction: column; background: rgba(26,31,46,0.6); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.chat-placeholder { margin: auto; color: var(--muted); }
.chat-msgs { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: 70%; align-self: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 8px 12px; }
.msg.mio { align-self: flex-end; background: var(--accent-blue); border-color: var(--accent-blue); color: #fff; }
.msg-txt { font-size: 0.92rem; overflow-wrap: anywhere; }
.msg-time { font-size: 0.66rem; opacity: 0.7; text-align: right; margin-top: 2px; }
.chat-input { display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border); }
.chat-input input { flex: 1; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 9px; }

/* ===== Morse (Sprint 6) ===== */
.morse-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.morse-card { background: rgba(26,31,46,0.92); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }
.morse-card h3 { margin: 0 0 10px; font-size: 1.05rem; }
.morse-card textarea { width: 100%; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 9px; font-family: inherit; resize: vertical; }
.morse-out { margin-top: 10px; min-height: 42px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px; overflow-wrap: anywhere; color: var(--accent-blue); }
.morse-actions { display: flex; gap: 8px; margin-top: 10px; }
.morse-hint { font-size: 0.75rem; color: var(--muted); margin-top: 8px; }
.morse-ctrls { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 18px; color: var(--muted); font-size: 0.9rem; }
.morse-ctrls label { display: flex; align-items: center; gap: 8px; }

/* ===== Notificaciones (Sprint 3) ===== */
.bell { position: relative; color: var(--text); font-size: 1.2rem; text-decoration: none; display: inline-flex; }
.bell:hover { color: var(--accent-blue); }
.bell-badge { position: absolute; top: -8px; right: -10px; background: var(--danger); color: #fff; font-size: 0.62rem; min-width: 16px; height: 16px; border-radius: 999px; padding: 0 4px; display: flex; align-items: center; justify-content: center; }
.notif-head { display: flex; justify-content: space-between; align-items: center; margin: 1.2rem 0; }
.notif { background: rgba(26,31,46,0.6); border: 1px solid var(--border); border-left: 3px solid var(--muted); border-radius: 10px; padding: 12px 14px; margin-bottom: 10px; cursor: pointer; }
.notif:hover { border-color: var(--accent-blue); }
.notif.unread { background: rgba(59,130,246,0.08); }
.notif.sev-info { border-left-color: var(--accent-blue); }
.notif.sev-success { border-left-color: var(--status-green); }
.notif.sev-warning { border-left-color: var(--warning); }
.notif.sev-danger { border-left-color: var(--danger); }
.notif-title { font-weight: 600; }
.notif-msg { color: var(--muted); font-size: 0.88rem; margin-top: 3px; }
.notif-time { color: var(--muted); font-size: 0.7rem; margin-top: 5px; }

/* ===== Morse v2 · telégrafo + árbol ===== */
.tele { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; margin: 10px 0; }
.tele-key { width: 90px; height: 90px; border-radius: 50%; background: var(--accent-blue); color: #fff; border: none; font-size: 1.8rem; cursor: pointer; user-select: none; touch-action: none; box-shadow: 0 6px 18px rgba(0,0,0,.4); }
.tele-key:active { transform: scale(0.96); background: #2f6fe0; }
.tele-info { flex: 1; min-width: 220px; }
.tele-code { font-size: 1.3rem; color: var(--accent-blue); letter-spacing: 0.12em; }
.tele-letter { font-size: 1.3rem; font-weight: 700; margin-left: 8px; }
.tele-text { min-height: 28px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin: 8px 0; font-size: 1.05rem; }
.morse-tree-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-top: 10px; background: rgba(13,15,20,0.5); border: 1px solid var(--border); border-radius: 12px; }
.morse-tree { display: block; width: 100%; max-width: 1120px; min-width: 640px; height: auto; }
.morse-tree-hint { display: none; font-size: 0.78rem; color: var(--muted); margin: 4px 2px 0; text-align: center; }
@media (max-width: 820px) { .morse-tree-hint { display: block; } }

/* Botón "ver en grande" (solo mobile) + overlay a pantalla completa rotado 90°:
   funciona aunque el SO tenga el giro bloqueado — el usuario gira el celu físicamente. */
.tree-fs-btn { display: none; }
@media (max-width: 820px) {
    .tree-fs-btn { display: inline-block; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 9px 14px; margin-top: 10px; cursor: pointer; font-size: .9rem; }
}
.tree-overlay { position: fixed; inset: 0; z-index: 3000; background: #0d0f14; }
.tree-overlay-close { position: fixed; top: 10px; right: 12px; z-index: 3002; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px 14px; font-size: .95rem; cursor: pointer; }
.tree-overlay-hint { position: fixed; top: 14px; left: 12px; z-index: 3002; color: var(--muted); font-size: .8rem; }
.tree-overlay-rot { position: absolute; top: 50%; left: 50%; width: 100vh; height: 100vw; transform: translate(-50%, -50%) rotate(90deg); display: flex; align-items: center; justify-content: center; }
.tree-overlay-rot .morse-tree-wrap { overflow: visible; border: none; background: transparent; width: 96vh; }
.tree-overlay-rot .morse-tree { min-width: 0; max-width: none; width: 100%; }
.tree-overlay-rot .morse-tree-hint { display: none; }
.tx-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.tx-row select { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 10px; }
.tx-hint { font-size: 0.78rem; color: var(--muted); }
.rx-box { margin-top: 14px; background: rgba(34,197,94,0.06); border: 1px solid var(--border); border-left: 3px solid var(--status-green); border-radius: 10px; padding: 10px 12px; }
.rx-tit { font-size: 0.8rem; color: var(--muted); margin-bottom: 4px; }
.rx-log { font-size: 1.1rem; letter-spacing: 0.1em; color: var(--status-green); overflow-wrap: anywhere; }

/* ===== SSTV (Sprint Radio) ===== */
.sstv-file { display: block; margin: 10px 0; color: var(--text); }
.sstv-tx { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 12px; }
.sstv-preview { width: 240px; max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--border); }
.sstv-controls { flex: 1; min-width: 240px; display: flex; flex-direction: column; gap: 10px; }
.exp-tag { font-size: .62rem; text-transform: uppercase; letter-spacing: .05em; color: #f59e0b; border: 1px solid #f59e0b66; border-radius: 999px; padding: 2px 8px; vertical-align: middle; margin-left: 6px; }
.rec-dot { color: var(--danger); font-size: .85rem; margin-left: 12px; animation: rec-blink 1s steps(2, start) infinite; }
@keyframes rec-blink { 50% { opacity: .25; } }
.alta-acciones { display: flex; align-items: center; gap: 14px; margin-top: 10px; flex-wrap: wrap; }
.user-card .row2 { display: flex; gap: 10px; flex-wrap: wrap; }
.user-card .row2 input { flex: 1; min-width: 180px; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px; }
.user-actions { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 10px; }
.btn-mini { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 7px 12px; font-size: .85rem; cursor: pointer; }
.btn-mini:hover { border-color: #3b82f6; }
.btn-mini:disabled { opacity: .45; cursor: not-allowed; }
.btn-danger { color: #fff; background: var(--danger); border-color: transparent; }
.btn-danger:hover { filter: brightness(1.12); border-color: transparent; }