* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --negro-titulo: #161616;
    --negro-texto: #444444;
    --verde: #636B46;
    --verde-claro: #737b56;
    --amarelo: #CEA24F;
    --gris-fondo: #f7f7f8;
    --gris-borde: #e5e5e5;
    --gris-sutil: #ececec;
    --branco: #ffffff;
    --radius: 12px;
    --serif: 'Merriweather', Georgia, 'Times New Roman', serif;
    --sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

html, body {
    height: 100%;
    font-family: var(--sans);
    font-size: 15px;
    color: var(--negro-texto);
    background: var(--branco);
    -webkit-font-smoothing: antialiased;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    max-width: 720px;
    margin: 0 auto;
    background: var(--branco);
}

/* Header */

header {
    padding: 18px 24px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--gris-borde);
}

.logo {
    font-family: var(--serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--negro-titulo);
    letter-spacing: -0.5px;
}

.logo-dot {
    color: var(--verde);
}

/* Chat area */

main {
    flex: 1;
    overflow-y: auto;
    padding: 0 24px 24px;
    scroll-behavior: smooth;
}

/* Welcome */

.welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    padding: 40px 0;
}

.welcome h1 {
    font-family: var(--serif);
    font-size: 24px;
    font-weight: 400;
    color: var(--negro-titulo);
    margin-bottom: 36px;
    letter-spacing: -0.3px;
    line-height: 1.4;
}

.welcome.hidden {
    display: none;
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 520px;
}

.suggestion {
    background: var(--branco);
    border: 1px solid var(--gris-borde);
    border-radius: 10px;
    padding: 10px 16px;
    font-size: 14px;
    font-family: var(--sans);
    color: var(--negro-texto);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    line-height: 1.4;
}

.suggestion:hover {
    border-color: var(--verde);
    box-shadow: 0 2px 8px rgba(99, 107, 70, 0.1);
}

.suggestion strong {
    color: var(--negro-titulo);
    font-weight: 600;
}

/* Messages */

#messages {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding-top: 8px;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 6px;
    animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-label {
    font-family: var(--sans);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: #aaa;
    padding-left: 2px;
}

.message.assistant .message-label {
    color: var(--verde-claro);
}

.message-content {
    line-height: 1.7;
    color: var(--negro-texto);
}

.message.user .message-content {
    color: var(--negro-titulo);
    font-weight: 450;
}

.message.assistant .message-content {
    color: var(--negro-texto);
}

/* Markdown content */

.message-content p {
    margin-bottom: 12px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content h2,
.message-content h3,
.message-content h4 {
    font-family: var(--sans);
    color: var(--negro-titulo);
    margin: 16px 0 6px;
    line-height: 1.3;
}

.message-content h2 { font-size: 15px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.3px; }
.message-content h3 { font-size: 14px; font-weight: 600; }
.message-content h4 { font-size: 14px; font-weight: 500; }

.message-content h2:first-child,
.message-content h3:first-child,
.message-content h4:first-child {
    margin-top: 0;
}

.message-content strong {
    color: var(--negro-titulo);
    font-weight: 600;
}

.message-content em {
    color: #999;
    font-style: italic;
}

.message-content table {
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 14px;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--gris-borde);
}

.message-content th,
.message-content td {
    border: 1px solid var(--gris-borde);
    padding: 8px 14px;
    text-align: left;
}

.message-content th {
    background: var(--gris-fondo);
    font-weight: 600;
    color: var(--negro-titulo);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.message-content tr:hover td {
    background: #fafafa;
}

.message-content ul,
.message-content ol {
    padding-left: 22px;
    margin: 10px 0;
}

.message-content li {
    margin-bottom: 5px;
}

/* Conxugacións (renderizado por código) */

.conxugacion {
    margin-top: 12px;
    animation: fadeIn 0.25s ease;
}

.conxugacion-modo {
    margin-bottom: 16px;
}

.conxugacion-modo:last-child {
    margin-bottom: 0;
}

.conxugacion-modo-titulo {
    font-family: var(--sans);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--verde);
    margin-bottom: 8px;
    padding-left: 2px;
}

.conxugacion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 8px;
}

.conxugacion-card {
    border: 1px solid var(--gris-borde);
    border-radius: 8px;
    overflow: hidden;
}

.conxugacion-card-titulo {
    background: var(--gris-fondo);
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--negro-titulo);
}

.conxugacion-card-corpo {
    padding: 2px 0;
}

.conxugacion-row {
    display: flex;
    padding: 2px 12px;
    font-size: 14px;
    line-height: 1.6;
}

.conxugacion-row:hover {
    background: var(--gris-fondo);
}

.conxugacion-persoa {
    width: 60px;
    flex-shrink: 0;
    color: #aaa;
    font-size: 12px;
    padding-top: 1px;
}

.conxugacion-forma {
    color: var(--negro-titulo);
    font-weight: 450;
}

.conxugacion-non-persoais {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 16px;
    font-size: 14px;
    color: var(--negro-texto);
    padding-left: 2px;
}

.conxugacion-non-persoais span {
    color: #aaa;
    font-size: 12px;
}

.conxugacion-non-persoais strong {
    color: var(--negro-titulo);
    font-weight: 450;
    font-size: 14px;
}

/* Loading */

.loading-dots {
    display: inline-flex;
    gap: 5px;
    padding: 6px 0;
}

.loading-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--verde-claro);
    animation: pulse 1.2s ease-in-out infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.15s; }
.loading-dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes pulse {
    0%, 80%, 100% { opacity: 0.25; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* Feedback */

.feedback {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.feedback-btn {
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 14px;
    color: #ccc;
    transition: color 0.2s, border-color 0.2s;
}

.feedback-btn:hover {
    color: var(--negro-texto);
    border-color: var(--gris-borde);
}

.feedback-btn.selected {
    color: var(--verde);
    border-color: var(--verde);
}

.feedback-btn:disabled {
    cursor: default;
    opacity: 0.5;
}

.feedback-comment {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    animation: fadeIn 0.15s ease;
}

.feedback-comment input {
    flex: 1;
    border: 1px solid var(--gris-borde);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 13px;
    font-family: var(--sans);
    color: var(--negro-texto);
    outline: none;
    transition: border-color 0.2s;
}

.feedback-comment input:focus {
    border-color: var(--verde);
}

.feedback-comment button {
    background: var(--verde);
    color: var(--branco);
    border: none;
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 13px;
    font-family: var(--sans);
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.feedback-comment button:hover {
    background: var(--verde-claro);
}

.feedback-sent {
    font-size: 12px;
    color: #aaa;
    margin-top: 8px;
}

/* Input area */

.input-area {
    flex-shrink: 0;
    padding: 14px 24px;
    border-top: 1px solid var(--gris-borde);
    background: var(--branco);
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    border: 1.5px solid var(--gris-borde);
    border-radius: var(--radius);
    padding: 8px 8px 8px 16px;
    background: var(--branco);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--verde);
    box-shadow: 0 0 0 3px rgba(99, 107, 70, 0.08);
}

#input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    font-family: var(--sans);
    color: var(--negro-titulo);
    resize: none;
    line-height: 1.5;
    max-height: 120px;
    background: transparent;
}

#input::placeholder {
    color: #bbb;
}

#send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    background: var(--negro-titulo);
    color: var(--branco);
    cursor: pointer;
    flex-shrink: 0;
    transition: opacity 0.2s, transform 0.15s;
}

#send-btn:disabled {
    opacity: 0.2;
    cursor: default;
}

#send-btn:not(:disabled):hover {
    opacity: 0.85;
}

#send-btn:not(:disabled):active {
    transform: scale(0.94);
}

/* Footer */

footer {
    text-align: center;
    padding: 10px 0 6px;
    font-size: 12px;
    color: #b0b0b0;
}

footer a {
    color: var(--verde);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--verde-claro);
    text-decoration: underline;
}

/* Mobile */

@media (max-width: 600px) {
    #app {
        max-width: 100%;
    }

    header {
        padding: 14px 16px;
    }

    main {
        padding: 0 16px 16px;
    }

    .welcome h1 {
        font-size: 16px;
        padding: 0 8px;
    }

    .suggestions {
        flex-direction: column;
        align-items: stretch;
        padding: 0 8px;
    }

    .suggestion {
        padding: 9px 16px;
        font-size: 13px;
    }    

    .input-area {
        padding: 12px 16px;
    }

    .conxugacion-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 6px;
    }

    .message-content table {
        font-size: 13px;
    }

    .message-content th,
    .message-content td {
        padding: 6px 8px;
    }
}