/* Variables per defecte (Mode Fosc) */
:root {
    --primari: #0b1120;
    --secundari: #38bdf8;
    --fons: #0f172a;
    --text: #f8fafc;
    --text-clar: #94a3b8;
    --blanc: rgba(30, 41, 59, 0.7);
    --border-vidre: rgba(255, 255, 255, 0.08);
    --bg-input: rgba(15, 23, 42, 0.6);
}

/* Mode Clar (S'activa amb JS) */
[data-tema="clar"] {
    --primari: #f1f5f9;
    --secundari: #0284c7;
    --fons: #e2e8f0;
    --text: #0f172a;
    --text-clar: #475569;
    --blanc: rgba(255, 255, 255, 0.8);
    --border-vidre: rgba(0, 0, 0, 0.1);
    --bg-input: rgba(255, 255, 255, 0.9);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

html, body { max-width: 100vw; overflow-x: hidden; background-color: var(--primari); color: var(--text); line-height: 1.7; transition: background-color 0.3s, color 0.3s; }
h1, h2, h3, h4, h5, h6, p, a, span { overflow-wrap: break-word; word-wrap: break-word; hyphens: auto; }

.fons-animat {
    position: fixed; top: -50%; left: -50%; width: 200%; height: 200%; z-index: -1;
    background: radial-gradient(circle at 50% 50%, rgba(56, 189, 248, 0.05) 0%, transparent 50%);
    animation: rotarFons 60s linear infinite;
}
@keyframes rotarFons { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Navegació */
.navbar { 
    background: var(--blanc); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-vidre);
    padding: 20px 40px; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100;
}
.navbar .links { display: flex; align-items: center; flex-wrap: wrap; }
.navbar a { color: var(--text); text-decoration: none; margin-left: 20px; font-weight: 500; transition: all 0.3s; }
.navbar a:hover, .navbar a.actiu { color: var(--secundari); }
.logo { font-size: 1.8rem; font-weight: 800; background: linear-gradient(to right, #38bdf8, #8b5cf6); -webkit-background-clip: text; color: transparent; }

/* FIX EXACTE DEL BOTÓ SELECTOR GRAN */
.selector-idioma {
    margin-left: 15px;
    padding: 4px 8px !important; /* Força un format estret i compacte */
    width: auto !important;      /* Evita que s'estiri al 100% */
    height: 32px;                /* Alçada simètrica amb els botons del costat */
    background: var(--bg-input);
    color: var(--text);
    border: 1px solid var(--border-vidre);
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    margin-bottom: 0 !important; /* Elimina el marge inferior dels inputs grans */
    transition: 0.3s;
}
.selector-idioma:focus { outline: none; border-color: var(--secundari); }

#btn-tema { background: transparent; border: none; font-size: 1.2rem; cursor: pointer; margin-left: 20px; }
.btn-login { background: var(--secundari); color: #fff !important; padding: 8px 15px; border-radius: 6px; }

/* Capçalera i Botons */
.hero { padding: 100px 20px; text-align: center; max-width: 900px; margin: auto; }
.hero h1 { font-size: 3rem; margin-bottom: 20px; }
.btn, .btn-accio { background: linear-gradient(135deg, var(--secundari), #2563eb); color: #fff; padding: 15px 30px; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; transition: 0.3s; width: 100%; text-align: center;}
.btn:hover, .btn-accio:hover { transform: translateY(-3px); box-shadow: 0 5px 15px rgba(56, 189, 248, 0.4); }
.btn-outline { background: transparent; border: 1px solid var(--secundari); color: var(--text); padding: 10px; width: 100%; text-align: center; border-radius: 6px; cursor: pointer; transition: 0.3s; margin-top: auto;}
.btn-outline:hover { background: rgba(56, 189, 248, 0.1); }

/* Estructura i Targetes */
.contenidor { padding: 60px 20px; max-width: 1200px; margin: auto; }
.titol-seccio { text-align: center; font-size: 2.2rem; margin-bottom: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.targeta { background: var(--blanc); padding: 30px; border-radius: 12px; border: 1px solid var(--border-vidre); transition: 0.3s; display: flex; flex-direction: column;}
.targeta:hover { transform: translateY(-5px); border-color: var(--secundari); }
.targeta h3 { color: var(--secundari); margin-bottom: 15px; }

/* Formularis i Xat */
.formulari-caixa { background: var(--blanc); padding: 40px; border-radius: 12px; border: 1px solid var(--border-vidre); max-width: 500px; margin: auto; }
input, select, textarea { width: 100%; padding: 14px; border: 1px solid var(--border-vidre); border-radius: 6px; background: var(--bg-input); color: var(--text); margin-bottom: 15px; font-size: 1rem; transition: 0.3s; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--secundari); box-shadow: 0 0 8px rgba(56, 189, 248, 0.2); }
.chat-box { height: 400px; border: 1px solid var(--border-vidre); border-radius: 8px; padding: 20px; overflow-y: auto; background: var(--bg-input); margin-bottom: 15px; font-family: monospace; }
.chat-msg { background: var(--blanc); padding: 12px; border-radius: 8px; margin-bottom: 10px; border-left: 4px solid var(--secundari); }
.chat-msg.usuari { border-left: none; border-right: 4px solid #10b981; text-align: right; }

footer { text-align: center; padding: 30px; font-size: 0.9rem; color: var(--text-clar); }

@media (max-width: 768px) {
    .navbar { flex-direction: column; gap: 15px; }
    .navbar .links { justify-content: center; gap: 10px; }
    .navbar a { margin: 5px 0; }
    .selector-idioma { margin-left: 0; }
    .hero h1 { font-size: 2.2rem; }
    .grid-3 { grid-template-columns: 1fr; }
}