:root {
    --primary-color: #F74C43;
    --primary-light: rgba(247, 76, 67, 0.1);
    --bg-page: #F8F9FA;
    --white: #FFFFFF;
    --text-main: #2D3436;
    --text-muted: #636E72;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --border-radius: 20px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Prompt', 'Sarabun', sans-serif;
}

body {
    background-color: var(--bg-page);
    color: var(--text-main);
    padding-bottom: 80px; /* Space for bottom nav */
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* Glass Card */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.primary-card {
    background: var(--primary-color);
    color: var(--white);
    border-radius: 30px;
    position: relative;
    overflow: hidden;
}

.primary-card::after {
    content: '';
    position: absolute;
    top: 20px;
    right: -15px;
    width: 200px;
    height: 200px;
    background: url('../banner.png') no-repeat center / contain;
    opacity: 0.25;
    transform: rotate(-15deg);
    pointer-events: none;
    z-index: 0;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border-radius: 15px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-light {
    background-color: var(--white);
    color: var(--primary-color);
}

.btn-ghost {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    display: flex;
    justify-content: space-around;
    padding: 15px 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 10px;
    font-weight: 500;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: 24px;
    margin-bottom: 4px;
}

/* Typography */
h1 { font-size: 24px; font-weight: 700; }
h2 { font-size: 20px; font-weight: 600; }
h3 { font-size: 16px; font-weight: 600; }

.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }