:root {
    color-scheme: dark;
    --bg: #212121;
    --sidebar: #171717;
    --panel: #2f2f2f;
    --panel-hover: #3a3a3a;
    --text: #ececec;
    --muted: #999;
    --border: #414141;
    --accent: #10a37f;
    --accent-hover: #0d8f70;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
}

button, input, textarea, select {
    font: inherit;
}

button {
    cursor: pointer;
}

.app {
    display: flex;
    width: 100%;
    height: 100dvh;
    overflow: hidden;
}

/* Barra lateral */

.sidebar {
    width: 265px;
    flex-shrink: 0;
    background: var(--sidebar);
    padding: 18px 13px;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 3px 9px;
    font-weight: 650;
    font-size: 17px;
}

.brand-icon, .welcome-icon {
    color: var(--accent);
    font-size: 28px;
}

.mobile-close {
    display: none;
    margin-left: auto;
    background: transparent;
    color: var(--text);
    border: 0;
    font-size: 25px;
}

.new-chat {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: transparent;
    border: 1px solid #555;
    border-radius: 9px;
    color: var(--text);
    text-align: left;
}

.new-chat:hover, .suggestion:hover {
    background: var(--panel-hover);
}

.new-chat span {
    font-size: 20px;
}

.history-heading {
    color: var(--muted);
    font-size: 10px;
    letter-spacing: 1.2px;
    padding: 0 9px;
}

.history {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.history-item {
    width: 100%;
    padding: 10px;
    border: 0;
    border-radius: 7px;
    background: transparent;
    color: var(--text);
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.history-item:hover, .history-item.active {
    background: var(--panel);
}

.sidebar-footer {
    border-top: 1px solid var(--border);
    padding: 14px 8px 4px;
    color: var(--muted);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 9px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
}

/* Área principal */

.main {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.topbar {
    height: 57px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    padding: 0 23px;
    gap: 13px;
    border-bottom: 1px solid var(--border);
}

.topbar-title {
    font-weight: 600;
    font-size: 14px;
}

.topbar-right {
    margin-left: auto;
}

.connection-status {
    color: var(--muted);
    font-size: 12px;
}

.connection-status.connected {
    color: #36c995;
}

.menu-button {
    display: none;
    border: 0;
    background: transparent;
    color: var(--text);
    font-size: 19px;
}

/* Conversación */

.chat {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: 35px 20px;
}

.welcome {
    max-width: 760px;
    margin: 10vh auto 0;
    text-align: center;
}

.welcome-icon {
    font-size: 43px;
}

.welcome h1 {
    font-size: clamp(25px, 4vw, 34px);
    font-weight: 600;
    margin: 15px 0 9px;
}

.welcome p {
    color: var(--muted);
    font-size: 14px;
}

.suggestions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 40px;
}

.suggestion {
    display: flex;
    flex-direction: column;
    gap: 7px;
    padding: 17px;
    text-align: left;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: transparent;
    color: var(--text);
}

.suggestion span {
    color: var(--muted);
    font-size: 12px;
}

.messages {
    max-width: 790px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 9px;
    line-height: 1.65;
    font-size: 15px;
    overflow-wrap: anywhere;
}

.message.user {
    align-items: flex-end;
}

.message.user .message-content {
    background: #303030;
    padding: 12px 17px;
    border-radius: 18px;
    max-width: 85%;
}

.message.assistant .message-content {
    white-space: pre-wrap;
}

.message-role {
    color: var(--muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .4px;
}

.message-error {
    color: #ff8989;
}

/* Compositor */

.composer-area {
    width: min(790px, calc(100% - 40px));
    margin: 0 auto;
    padding: 12px 0 17px;
}

.composer-settings {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 9px;
    color: var(--muted);
    font-size: 12px;
}

.composer-settings select {
    max-width: 245px;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
    color: var(--text);
    font-size: 12px;
}

.token-button {
    margin-left: auto;
    background: transparent;
    border: 0;
    color: var(--muted);
    font-size: 12px;
}

.token-button:hover {
    color: var(--text);
}

.composer {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding: 12px 13px 12px 18px;
    border: 1px solid #555;
    border-radius: 18px;
    background: var(--panel);
}

.composer:focus-within {
    border-color: #777;
}

.composer textarea {
    flex: 1;
    resize: none;
    max-height: 180px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text);
    line-height: 1.5;
    padding: 5px 0;
}

.composer textarea::placeholder {
    color: #999;
}

.composer button {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border: 0;
    border-radius: 50%;
    background: var(--text);
    color: #171717;
    font-size: 22px;
    font-weight: 700;
}

.composer button:disabled {
    opacity: .4;
    cursor: not-allowed;
}

.disclaimer {
    text-align: center;
    color: var(--muted);
    font-size: 10px;
    margin: 10px 0 0;
}

/* Diálogo de acceso */

.dialog-backdrop {
    position: fixed;
    inset: 0;
    z-index: 10;
    background: #000a;
    display: grid;
    place-items: center;
    padding: 18px;
}

.hidden {
    display: none !important;
}

.dialog {
    width: min(420px, 100%);
    padding: 25px;
    border: 1px solid var(--border);
    border-radius: 15px;
    background: #252525;
}

.dialog h2 {
    font-size: 19px;
    margin-top: 0;
}

.dialog p {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.5;
}

.dialog input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #171717;
    color: var(--text);
    outline: none;
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 9px;
    margin-top: 17px;
}

.dialog-actions button {
    padding: 9px 13px;
    border-radius: 8px;
    border: 0;
}

.secondary-button {
    background: var(--panel);
    color: var(--text);
}

.primary-button {
    background: var(--accent);
    color: white;
}

.primary-button:hover {
    background: var(--accent-hover);
}

.dialog .dialog-note {
    font-size: 11px;
    margin-bottom: 0;
}

/* Móvil */

@media (max-width: 700px) {
    .sidebar {
        position: fixed;
        z-index: 5;
        inset: 0 auto 0 0;
        width: min(285px, 85vw);
        transform: translateX(-105%);
        transition: transform .2s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-close, .menu-button {
        display: block;
    }

    .topbar {
        padding: 0 14px;
    }

    .chat {
        padding: 22px 15px;
    }

    .welcome {
        margin-top: 7vh;
    }

    .suggestions {
        grid-template-columns: 1fr;
        margin-top: 25px;
    }

    .composer-area {
        width: calc(100% - 24px);
        padding-bottom: 12px;
    }

    .composer-settings {
        flex-wrap: wrap;
    }

    .composer-settings select {
        max-width: 210px;
    }

    .message.user .message-content {
        max-width: 95%;
    }
}