/* VIETNAM VISA GUIDE - STYLESHEET */
:root {
    --primary-red: #cc0033;
    --accent-gold: #f5a623;
    --dark-blue: #1a2a5e;
    --light-bg: #f8f9fa;
    --card-bg: #ffffff;
    --text-main: #2c3e50;
    --text-muted: #6c757d;
    --border-color: #e9ecef;
    --radius: 8px;
    --shadow: 0 4px 12px rgba(0,0,0,0.05);
}

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

body {
    font-family: 'Nunito', sans-serif;
    color: var(--text-main);
    background-color: var(--light-bg);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a {
    color: var(--primary-red);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--dark-blue);
}

/* HEADER & NAVIGATION */
header {
    background-color: #ffffff;
    border-bottom: 3px solid var(--primary-red);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark-blue);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--primary-red);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-link {
    font-weight: 700;
    color: var(--dark-blue);
    padding: 0.5rem 0;
    position: relative;
}

.nav-link.active, .nav-link:hover {
    color: var(--primary-red);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-red);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark-blue);
}

/* CONTAINER & PAGES */
main {
    flex: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.page-title {
    font-size: 2rem;
    color: var(--dark-blue);
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* HERO SECTION */
.hero {
    background: linear-gradient(rgba(26, 42, 94, 0.75), rgba(26, 42, 94, 0.75)), 
                url('https://images.unsplash.com/photo-1528127269322-539801943592?auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
    color: #ffffff;
    padding: 4rem 1.5rem;
    text-align: center;
    border-radius: var(--radius);
    margin-bottom: 2.5rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: #e0e6ed;
}

/* NOTICE BOXES */
.info-box {
    background-color: #eef4ff;
    border-left: 4px solid var(--dark-blue);
    padding: 1.25rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 2rem;
}

.warning-box {
    background-color: #fff9e6;
    border-left: 4px solid var(--accent-gold);
    padding: 1.25rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 2rem;
}

/* NAV CARDS (HOME) */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

.card h3 {
    color: var(--dark-blue);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.card-link {
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* VISA TYPES GRID */
.visa-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.visa-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    border-top: 4px solid var(--primary-red);
    box-shadow: var(--shadow);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.visa-card h3 {
    color: var(--dark-blue);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.visa-meta {
    list-style: none;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.visa-meta li {
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
}

.visa-meta span {
    font-weight: 700;
    color: var(--dark-blue);
}

/* TABLES */
.table-responsive {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--dark-blue);
    color: #ffffff;
    font-weight: 700;
}

tr:nth-child(even) {
    background-color: #fcfcfc;
}

/* STEPS (HOW TO APPLY) */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.step-item {
    display: flex;
    gap: 1.5rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.step-number {
    background: var(--primary-red);
    color: #ffffff;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h3 {
    color: var(--dark-blue);
    margin-bottom: 0.5rem;
}

.official-btn {
    display: inline-block;
    background-color: var(--dark-blue);
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 700;
    margin-top: 1rem;
    transition: background-color 0.2s ease;
}

.official-btn:hover {
    background-color: var(--primary-red);
    color: #ffffff;
}

/* FAQ ACCORDION */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.2rem 1.5rem;
    background: none;
    border: none;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark-blue);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: inherit;
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--primary-red);
}

.faq-item.active .faq-question::after {
    content: '−';
}

.faq-answer {
    display: none;
    padding: 0 1.5rem 1.2rem 1.5rem;
    color: var(--text-main);
    border-top: 1px solid transparent;
}

.faq-item.active .faq-answer {
    display: block;
    border-top-color: var(--border-color);
    padding-top: 1rem;
}

/* FOOTER */
footer {
    background-color: var(--dark-blue);
    color: #ffffff;
    padding: 3rem 1.5rem 1.5rem 1.5rem;
    margin-top: auto;
}

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

.disclaimer {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.25rem;
    border-radius: var(--radius);
    border-left: 3px solid var(--accent-gold);
    font-size: 0.88rem;
    color: #d0d7de;
    margin-bottom: 2rem;
    line-height: 1.5;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #a0aec0;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.footer-links a {
    color: #ffffff;
}

.footer-links a:hover {
    color: var(--accent-gold);
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        border-bottom: 2px solid var(--primary-red);
    }

    .nav-menu.show {
        display: flex;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .step-item {
        flex-direction: column;
        gap: 0.75rem;
    }
}