:root {
    --azul: #1B3A5C;
    --azul-hover: #16314d;
    --naranja: #E8621A;
    --naranja-hover: #c95314;
    --gris: #F5F5F5;
    --texto: #333333;
    --texto-suave: #6b6b6b;
    --borde: #d9d9d9;
    --rojo: #b00020;
    --rojo-fondo: #fdecea;
    --radio: 6px;
    --sombra: 0 2px 12px rgba(27, 58, 92, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--texto);
    background: #fff;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 780px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ────── Header ────── */
.site-header {
    background: var(--azul);
    color: #fff;
    padding: 36px 0 28px;
}

.brand {
    margin: 0;
    font-size: 44px;
    font-weight: 300;
    letter-spacing: 0.5px;
    line-height: 1;
    font-family: "Georgia", "Times New Roman", serif;
}

.brand-soft {
    color: #fff;
    font-weight: 300;
}

.brand-accent {
    color: var(--naranja);
    font-weight: 700;
    font-style: italic;
}

.tagline {
    margin: 6px 0 0;
    font-size: 14px;
    letter-spacing: 0.4px;
    color: rgba(255, 255, 255, 0.78);
    text-transform: uppercase;
}

/* ────── Main ────── */
.main-content {
    flex: 1;
    padding: 36px 24px 48px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background: #fff;
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    padding: 28px;
    box-shadow: var(--sombra);
}

.form-card h2,
.result-card h2 {
    margin: 0 0 16px;
    font-size: 20px;
    font-weight: 600;
    color: var(--azul);
}

/* ────── Form ────── */
textarea {
    width: 100%;
    min-height: 200px;
    padding: 14px 16px;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.55;
    color: var(--texto);
    background: #fff;
    border: 1px solid var(--borde);
    border-radius: var(--radio);
    resize: vertical;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

textarea::placeholder {
    color: var(--texto-suave);
}

textarea:focus {
    outline: none;
    border-color: var(--azul);
    box-shadow: 0 0 0 3px rgba(27, 58, 92, 0.12);
}

textarea:disabled {
    background: var(--gris);
    cursor: not-allowed;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ────── Buttons ────── */
.btn {
    display: inline-block;
    width: 100%;
    margin-top: 18px;
    padding: 14px 22px;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.3px;
    color: #fff;
    background: var(--azul);
    border: none;
    border-radius: var(--radio);
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.05s ease;
}

.btn:hover:not(:disabled) {
    background: var(--azul-hover);
}

.btn:active:not(:disabled) {
    transform: translateY(1px);
}

.btn:disabled {
    background: #94a3b8;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--azul);
}

.btn-accent {
    background: var(--naranja);
    font-size: 16px;
    padding: 16px 22px;
}

.btn-accent:hover:not(:disabled) {
    background: var(--naranja-hover);
}

/* ────── Status panel ────── */
.status-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 28px;
    border-left: 4px solid var(--azul);
}

.status-message {
    margin: 0;
    font-size: 15px;
    color: var(--texto);
    font-weight: 500;
}

.spinner {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    border: 3px solid rgba(27, 58, 92, 0.15);
    border-top-color: var(--azul);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ────── Error panel ────── */
.error-card {
    border-left: 4px solid var(--rojo);
    background: var(--rojo-fondo);
    border-color: rgba(176, 0, 32, 0.2);
}

.error-message {
    margin: 0;
    color: var(--rojo);
    font-size: 15px;
    font-weight: 500;
}

/* ────── Result panel ────── */
.result-card {
    border-left: 4px solid var(--naranja);
}

.result-meta {
    margin: 0 0 22px;
    padding: 16px 18px;
    background: var(--gris);
    border-radius: var(--radio);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.meta-row {
    display: flex;
    gap: 12px;
    align-items: baseline;
    font-size: 14px;
}

.meta-row dt {
    flex: 0 0 160px;
    color: var(--texto-suave);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    font-size: 12px;
    font-weight: 600;
}

.meta-row dd {
    margin: 0;
    color: var(--texto);
    font-weight: 500;
}

/* ────── Footer ────── */
.site-footer {
    background: var(--gris);
    border-top: 1px solid var(--borde);
    padding: 18px 0;
    margin-top: auto;
}

.site-footer p {
    margin: 0;
    text-align: center;
    color: var(--texto-suave);
    font-size: 13px;
    letter-spacing: 0.3px;
}

/* ────── Responsive ────── */
@media (max-width: 600px) {
    .container { padding: 0 16px; }
    .site-header { padding: 28px 0 22px; }
    .brand { font-size: 36px; }
    .tagline { font-size: 12px; }
    .main-content { padding: 24px 16px 36px; gap: 16px; }
    .card { padding: 20px; }
    .meta-row { flex-direction: column; gap: 2px; }
    .meta-row dt { flex: none; }
}