/* ── RESET & VARIABLES ────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Tema claro (por defecto) */
    --bg:           #f4f4f8;
    --surface:      #ffffff;
    --surface2:     #f0f0f5;
    --text:         #1a1a2e;
    --text-muted:   #6b7280;
    --border:       #e0e0ea;
    --primary:      #ec680f;
    --primary-dark: #b15e10;
    --danger:       #ef4444;
    --danger-dark:  #dc2626;
    --warning:      #f59e0b;
    --success:      #10b981;
    --radius:       12px;
    --shadow:       0 2px 8px rgba(0,0,0,.08), 0 8px 20px rgba(0,0,0,.05);
    --shadow-hover: 0 4px 16px rgba(0,0,0,.14);
    --transition:   .2s ease;
}

/* ── TEMA OSCURO ────────────────────────────────────────── */
body.dark {
    --bg:         #0f0f1a;
    --surface:    #1a1a2e;
    --surface2:   #16213e;
    --text:       #e2e8f0;
    --text-muted: #94a3b8;
    --border:     #2d2d4e;
}

/* ── BASE ───────────────────────────────────────────────── */
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background var(--transition), color var(--transition);
}

/* ── HEADER ─────────────────────────────────────────────── */
header {
    background: var(--primary);
    color: #fff;
    padding: 24px 32px;
    box-shadow: 0 2px 12px rgba(99,102,241,.3);
}

header h1 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -.3px;
}


/* ── MAIN ───────────────────────────────────────────────── */
main {
    flex: 1;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    padding: 32px 20px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* ── FORMULARIO ─────────────────────────────────────────── */
.formulario-section {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
}

.campo {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 18px;
}

.campo label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.req {
    color: var(--danger);
}

.campo input,
.campo textarea {
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    background: var(--surface2);
    color: var(--text);
    font-family: inherit;
    font-size: 15px;
    transition: border-color var(--transition), box-shadow var(--transition);
    resize: vertical;
}

.campo input:focus,
.campo textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}

/* Validación visual */
.campo input:invalid:not(:placeholder-shown),
.campo textarea:invalid:not(:placeholder-shown) {
    border-color: var(--danger);
}

/* ── BOTONES ────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:hover  { transform: translateY(-1px); box-shadow: var(--shadow-hover); }
.btn:active { transform: translateY(0); }

.btn-primary    { background: var(--primary);  color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }

.btn-secundario { background: var(--surface2); color: var(--text); border: 1.5px solid var(--border); }
.btn-secundario:hover { background: var(--border); }

.btn-peligro    { background: var(--danger); color: #fff; }
.btn-peligro:hover { background: var(--danger-dark); }

.btn-sm { padding: 6px 12px; font-size: 12px; border-radius: 6px; }

.botones-form  { display: flex; gap: 10px; flex-wrap: wrap; }
.botones-extra {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* ── CONTENEDOR TARJETAS ────────────────────────────────── */
.contenedor-tarjetas {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.mensaje-vacio {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-size: 15px;
    padding: 40px 0;
}

/* ── TARJETA ────────────────────────────────────────────── */
.tarjeta {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition), transform var(--transition),
                background var(--transition), color var(--transition);
    display: flex;
    flex-direction: column;
}

.tarjeta:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

/* Tarjeta en modo dark individual */
.tarjeta.dark-card {
    background: #1a1a2e;
    color: #e2e8f0;
    border-color: #2d2d4e;
}

/* Imagen de la tarjeta */
.tarjeta-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    transition: opacity var(--transition);
}

.tarjeta-img.oculta {
    display: none;
}

/* Cuerpo de la tarjeta */
.tarjeta-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tarjeta-titulo {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.3;
}

.tarjeta-descripcion {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    flex: 1;
}

.tarjeta.dark-card .tarjeta-descripcion {
    color: #94a3b8;
}

/* Acciones de la tarjeta */
.tarjeta-acciones {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.tarjeta.dark-card .tarjeta-acciones {
    border-top-color: #2d2d4e;
}

/* ── FOOTER ─────────────────────────────────────────────── */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 16px 32px;
    text-align: center;
}

footer address {
    font-style: normal;
    font-size: 13px;
    color: var(--text-muted);
}

footer a {
    color: var(--primary);
    text-decoration: none;
}

footer a:hover { text-decoration: underline; }

footer address img {
     height: 22px;
     opacity: .7;
     transition: opacity .2s;
 }

 footer address img:hover {
     opacity: 1;
 }