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

:root {
    --primary: #1e40af;
    --primary-dark: #1e3a8a;
    --accent: #f59e0b;
    --text: #1f2937;
    --muted: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f3f4f6;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

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

/* Header & Nav */
.header {
    background: var(--bg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

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

.nav-menu {
    display: flex;
    gap: 22px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--primary);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    text-align: center;
    padding: 90px 20px;
}

.hero h1 {
    font-size: 2.4rem;
    margin-bottom: 16px;
}

.hero p {
    font-size: 1.1rem;
    max-width: 640px;
    margin: 0 auto 28px;
    opacity: 0.95;
}

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.btn:hover {
    background: #d97706;
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 70px 0;
}

.section.alt {
    background: var(--bg-alt);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 14px;
}

.section-desc {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 40px;
    color: var(--muted);
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}

.stat h3 {
    font-size: 2rem;
    color: var(--primary);
}

.stat p {
    color: var(--muted);
}

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg);
    border-radius: 10px;
    padding: 28px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.section.alt .card {
    background: #fff;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
}

.card-icon {
    font-size: 2.4rem;
    margin-bottom: 12px;
}

.card h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 8px;
}

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

/* Contact */
.contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info p {
    margin-bottom: 12px;
    color: var(--text);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-note {
    font-size: 0.9rem;
    color: #16a34a;
    min-height: 20px;
}

/* Footer */
.footer {
    background: var(--primary-dark);
    color: #fff;
    text-align: center;
    padding: 24px 0;
    font-size: 0.9rem;
}

/* Responsif */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
        gap: 14px;
    }

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

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

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact {
        grid-template-columns: 1fr;
    }
}