/* ----------------------------------------------------------------------
   VARIABILI E PALETTE CROMATICA (Tema Blu Elettrico & Neon)
   ---------------------------------------------------------------------- */
:root[data-theme="dark"] {
    --bg-primary: #0a0f1d;
    --bg-secondary: #111a30;
    --border-color: #1e3264;
    --text-primary: #f0f4ff;
    --text-secondary: #8a9fc4;
    --accent-color: #0052ff;  /* Blu Elettrico Vivido */
    --accent-neon: #00d2ff;   /* Cyan Neon Accattivante */
    --navbar-bg: #0d1527;
    --card-bg: #14213d;
}

:root[data-theme="light"] {
    --bg-primary: #f4f7fc;
    --bg-secondary: #ffffff;
    --border-color: #cbdcf7;
    --text-primary: #0f1c3f;
    --text-secondary: #5c6b89;
    --accent-color: #0046ff;  /* Blu Elettrico ad alto contrasto per il light mode */
    --accent-neon: #002db3;
    --navbar-bg: #ffffff;
    --card-bg: #ffffff;
}

/* ----------------------------------------------------------------------
   RESET E LAYOUT DI BASE
   ---------------------------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ----------------------------------------------------------------------
   NAVBAR ISTITUZIONALE
   ---------------------------------------------------------------------- */
.navbar {
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 15px 20px;
}

.logo {
    font-weight: 700;
    font-size: 1.3rem;
    text-decoration: none;
    color: var(--accent-color);
    letter-spacing: -0.01em;
}

.nav-menu {
    display: flex;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--accent-color);
}

/* ----------------------------------------------------------------------
   INTERRUTTORE TEMA (Toggle)
   ---------------------------------------------------------------------- */
.theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s;
}

.theme-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-color);
}

.mode-icon::before {
    content: "🌙";
}

:root[data-theme="light"] .mode-icon::before {
    content: "☀️";
}

/* ----------------------------------------------------------------------
   SEZIONI CONTENUTO
   ---------------------------------------------------------------------- */
.main-content {
    flex: 1;
    padding: 60px 0;
}

.hero-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.divider {
    border: 0;
    height: 1px;
    background-color: var(--border-color);
    margin: 30px 0;
}

.intro-box {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 6px;
    text-align: left;
}

/* ----------------------------------------------------------------------
   FOOTER
   ---------------------------------------------------------------------- */
.footer {
    background-color: var(--navbar-bg);
    border-top: 1px solid var(--border-color);
    padding: 25px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-link {
    color: var(--accent-color);
    text-decoration: none;
}

.footer-link:hover {
    text-decoration: underline;
}