/* --- CSS Variables for Theming --- */
:root {
    /* Obsidian Dark Theme (Default) */
    --bg-base: #050505;
    --bg-header: radial-gradient(circle at center, #111 0%, #050505 100%);
    --card-bg: #0a0a0a;
    --card-popular-bg: linear-gradient(180deg, #0f0e0a 0%, #050505 100%);
    --border-color: #222;
    --border-popular: rgba(212, 175, 55, 0.5);

    --text-main: #e0e0e0;
    --text-heading: #ffffff;
    --text-muted: #a0a0a0;
    --text-remark: #666;

    --accent-gold: #d4af37;
    --accent-hover-text: #050505;
    --shadow-gold: rgba(212, 175, 55, 0.08);
}

[data-theme="light"] {
    /* Alabaster Light Theme */
    --bg-base: #fcfbf9;
    --bg-header: radial-gradient(circle at center, #ffffff 0%, #f3efe6 100%);
    --card-bg: #ffffff;
    --card-popular-bg: linear-gradient(180deg, #ffffff 0%, #fcfbf9 100%);
    --border-color: #e5dfd3;
    --border-popular: rgba(181, 133, 0, 0.5);

    --text-main: #333333;
    --text-heading: #111111;
    --text-muted: #666666;
    --text-remark: #888888;

    --accent-gold: #b58500;
    /* Darker gold for better contrast on light backgrounds */
    --accent-hover-text: #ffffff;
    --shadow-gold: rgba(181, 133, 0, 0.15);
}

/* --- Base Styles & Typography --- */
body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: 'Montserrat', sans-serif;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.5s ease, color 0.5s ease;
}

h1,
h2,
h3,
.price,
.panel-title {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    margin: 0;
    color: var(--text-heading);
}

/* --- Theme Toggle Button --- */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    cursor: pointer;
    z-index: 100;
    font-family: 'Montserrat', sans-serif;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

/* --- Header Section --- */
.pricing-header {
    text-align: center;
    padding: 8rem 2rem 4rem;
    background: var(--bg-header);
    transition: background 0.5s ease;
}

.panel-title {
    font-size: 4rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px var(--shadow-gold);
}

.subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    letter-spacing: 1px;
    color: var(--text-muted);
}

/* --- Pricing Grid Layout --- */
.pricing-section {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 2rem 8rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    align-items: stretch;
}

/* --- Individual Pricing Cards --- */
.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease, background 0.5s ease;
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-gold);
    box-shadow: 0 10px 40px var(--shadow-gold);
}

/* Highlight the middle tier */
.pricing-card.popular {
    border-color: var(--border-popular);
    background: var(--card-popular-bg);
    position: relative;
}

.pricing-card.popular::before {
    content: 'Most Popular';
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-gold);
    color: var(--accent-hover-text);
    padding: 0.4rem 1.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* --- Card Typography & Internal Spacing --- */
.card-header {
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
    margin-bottom: 2rem;
}

.card-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.price {
    font-size: 2.5rem;
    color: var(--accent-gold);
}

.feature-group {
    margin-bottom: 2rem;
}

.feature-group h3 {
    font-size: 1.1rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.feature-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-group li {
    font-size: 0.95rem;
    color: var(--text-main);
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.5rem;
    font-weight: 400;
    line-height: 1.5;
}

.feature-group li::before {
    content: '✦';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-gold);
    font-size: 0.9rem;
}

.feature-group.remark h3,
.feature-group.remark li {
    color: var(--text-remark);
}

.feature-group.remark li::before {
    color: var(--text-remark);
}

/* --- Call to Action Button --- */
.cta-button {
    margin-top: auto;
    display: block;
    text-align: center;
    text-decoration: none;
    background: transparent;
    color: var(--accent-gold);
    border: 1px solid var(--accent-gold);
    padding: 1rem;
    border-radius: 4px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: var(--accent-gold);
    color: var(--accent-hover-text);
}

.pricing-card.popular .cta-button {
    background: var(--accent-gold);
    color: var(--accent-hover-text);
}

.pricing-card.popular .cta-button:hover {
    background: transparent;
    color: var(--accent-gold);
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .panel-title {
        font-size: 2.8rem;
    }
}