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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: #333;
    background: #f8f9fa;
    line-height: 1.8;
}

.header {
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    color: black;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: #e63848;
    transition: width 0.3s;
    border-radius: 10px;
}

nav a:hover::after {
    width: 100%;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.2);
    color: black;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

#lang-buttons {
    display: flex;
    gap: 0.5rem;
    border-left: 2px solid rgba(0, 0, 0, 0.3);
    padding-left: 1.5rem;
    margin-left: 1rem;
}

.lang-btn:hover,
.lang-btn.active {
    background: #e63848;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: pulse 2s ease-in-out infinite;
}

#imgLogo {
    height: 40px;
    vertical-align: middle;
    margin-left: 10px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.lang-section {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.1);
}

h1 {
    font-family: 'Bangers', cursive;
    font-size: 3rem;
    color: #0063a3;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

h2 {
    font-family: 'Bangers', cursive;
    font-size: 2rem;
    color: #e63848;
    margin: 2rem 0 1rem;
    letter-spacing: 1px;
}

h3 {
    font-size: 1.3rem;
    color: #0063a3;
    margin: 1.5rem 0 0.75rem;
    font-weight: 800;
}

p {
    margin-bottom: 1rem;
}

ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
    color: #555;
}

.date {
    font-style: italic;
    color: #888;
    margin-bottom: 2rem;
}

.back-link {
    display: inline-block;
    background: #0063a3;
    color: white;
    padding: 1rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 700;
    margin-top: 2rem;
    transition: all 0.3s;
}

.back-link:hover {
    background: #e63848;
    transform: translateY(-3px);
}

.highlight {
    background: #fff3cd;
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
}

.optional {
    color: #888;
    font-style: italic;
    font-size: 0.9em;
}

.footer {
    /* background: linear-gradient(135deg, #764ba2 0%, #667eea 100%); */
    background: linear-gradient(135deg, #4a7fd6 0%, #5e8eea 100%);
    color: #fff;
    padding: 3rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

/* ── Hamburger button ─────────────────────────────────────────── */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #764ba2;
    padding: 0.3rem 0.5rem;
    line-height: 1;
    border-radius: 8px;
    transition: background 0.2s;
}

.hamburger-btn:hover {
    background: rgba(118, 75, 162, 0.1);
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
    .header {
        padding: 1rem 1.2rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .hamburger-btn {
        display: block;
    }

    nav {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
        padding: 1rem 0;
        border-top: 1px solid #eee;
        margin-top: 0.3rem;
    }

    nav.nav-open {
        display: flex;
    }

    nav a {
        width: 100%;
        padding: 0.3rem 0;
    }

    #lang-buttons {
        border-left: none;
        border-right: none;
        padding-left: 0;
        padding-right: 0;
        margin-left: 0;
        flex-wrap: wrap;
    }

    .container {
        padding: 1.5rem 1rem;
    }

    .lang-section {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .lang-section {
        padding: 1rem 0.8rem;
    }

    .logo {
        font-size: 1.5rem;
    }

    #imgLogo {
        height: 30px;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }

    50% {
        transform: scale(1.08);
        filter: brightness(1.2);
    }

    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}