@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;700&display=swap');

:root {
    --primary-blue: #0D2F4B;
    --accent-gold: #D4AF37;
    --light-gray: #f4f7f6;
    --dark-gray: #333333;
    --white: #ffffff;
}

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

body {
    font-family: 'Kanit', sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light-gray);
}

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

/* --- ส่วนของ Navigation Bar --- */
.navbar {
    background-color: var(--white);
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
}

/* --- ส่วนเลือกแผน --- */
.plans-section {
    padding: 60px 0;
}

.plans-header {
    text-align: center;
    margin-bottom: 40px;
}

.plans-header h1 {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.plans-header p {
    font-size: 1.1rem;
    color: #555;
    max-width: 600px;
    margin: 0 auto;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.plan-card {
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.plan-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.plan-card.popular {
    border: 2px solid var(--accent-gold);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gold);
    color: var(--primary-blue);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
}

.plan-card h3 {
    font-size: 1.8rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.plan-card .goal {
    color: #666;
    font-size: 1rem;
    margin-bottom: 20px;
}

.plan-price {
    margin-bottom: 20px;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
    padding: 15px 0;
}

.plan-price .monthly-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
}

.plan-price .total-price {
    font-size: 0.9rem;
    color: #6c757d;
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 20px 0;
    text-align: left;
    flex-grow: 1;
}

.plan-features li {
    padding: 8px 0;
    display: flex;
    align-items: center;
}

.plan-features li::before {
    content: '✔';
    color: var(--accent-gold);
    margin-right: 10px;
    font-weight: bold;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
    display: inline-block;
    width: 100%;
    font-size: 1.1rem;
    margin-top: auto; /* Pushes button to the bottom */
}

.btn-primary {
    background-color: var(--accent-gold);
    color: var(--primary-blue);
}
.btn-primary:hover { background-color: #c8a02b; }

.btn-secondary {
    background-color: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}
.btn-secondary:hover {
    background-color: var(--primary-blue);
    color: var(--white);
}