* {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    margin: 0;
    color: #333;
    background: #ffffff;
}

/* ================= TOP BAR ================= */
.top-bar {
    background: #1f1f1f;
    color: #ffffff;
    font-size: 14px;
}

.top-bar-inner {
    max-width: 1200px;
    margin: auto;
    padding: 8px 20px;
    display: flex;
    justify-content: space-between;
}

/* ================= HEADER ================= */
.main-header {
    background: #ffffff;
    border-bottom: 1px solid #ddd;
}

.header-inner {
    max-width: 1200px;
    margin: auto;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}

/* LOGO BIG SIZE */
.main-logo {
    height: 90px;
    width: auto;
}

/* BRAND TEXT */
.brand-name h1 {
    margin: 0;
    font-size: 30px;
    color: #0b3c5d;
}

.brand-name p {
    margin: 5px 0 0;
    font-size: 15px;
    color: #555;
}

/* NAVIGATION */
.main-nav {
    margin-left: auto;
}

.main-nav a {
    margin-left: 25px;
    text-decoration: none;
    font-weight: bold;
    color: #0b3c5d;
}

/* ================= HERO ================= */
.hero {
    text-align: center;
    padding: 80px 20px;
    background: #f4f7fb;
}

.hero h1 {
    color: #0b3c5d;
}

.tagline {
    font-size: 18px;
    margin-top: 10px;
}

.audience {
    margin: 15px 0;
    font-weight: bold;
}

.btn-primary {
    background: #0b3c5d;
    color: white;
    padding: 14px 30px;
    text-decoration: none;
    border-radius: 5px;
    display: inline-block;
    margin-top: 20px;
}

/* ================= COURSES ================= */
.section {
    padding: 70px 20px;
    text-align: center;
}

.section h2 {
    color: #0b3c5d;
    margin-bottom: 30px;
}

.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    max-width: 1100px;
    margin: auto;
}

.course-card {
    background: white;
    padding: 25px;
    border-left: 5px solid #0b3c5d;
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

/* ================= FOOTER ================= */
.site-footer {
    background: #0b3c5d;
    color: white;
    text-align: center;
    padding: 15px;
}

/* ================= WHATSAPP ================= */
.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25D366;
    color: white;
    padding: 15px;
    border-radius: 50%;
    font-size: 22px;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 999;
}

/* ================= POPUP ================= */

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 9999;
}

.popup-content {
    background: #ffffff;
    width: 90%;
    max-width: 420px;
    margin: 12% auto;
    padding: 30px;
    border-radius: 6px;
    text-align: center;
}

.popup-content h3 {
    margin-bottom: 20px;
    color: #0b3c5d;
}

.popup-content input,
.popup-content select {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
}

.popup-content button {
    width: 100%;
}

.close {
    float: right;
    font-size: 22px;
    cursor: pointer;
}

/* COURSES PAGE */
.course-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

/* ================= COURSE BUTTON STYLE (NEW) ================= */

.course-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 50px;
}

.course-buttons button {
    background: #0b3c5d;
    color: #ffffff;
    border: none;
    padding: 16px 26px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    min-width: 180px;
    transition: all 0.3s ease;
}

.course-buttons button:hover {
    background: #09405f;
    transform: translateY(-2px);
}


.course-buttons button:hover {
    background: #09405f;
}

.course-content {
    display: none;
    max-width: 900px;
    margin: auto;
    text-align: left;
    background: #f9f9f9;
    padding: 30px;
    border-left: 5px solid #0b3c5d;
}

.course-content h3 {
    margin-bottom: 15px;
    color: #0b3c5d;
}

.course-content ul {
    padding-left: 20px;
}

.course-content li {
    margin-bottom: 10px;
}