/* THEME: CELESTIAL (Space / Elegant) */
:root {
    --bg-body: #0b0d17;
    --bg-card: rgba(20, 24, 40, 0.6);
    --bg-card-hover: rgba(30, 36, 60, 0.8);

    --primary: #d0d6f9;
    /* Pale Blue */
    --secondary: #ffffff;

    --text-main: #d0d6f9;
    --text-muted: #8da2c0;

    --border-color: rgba(208, 214, 249, 0.1);
    --border-active: rgba(208, 214, 249, 0.3);

    --font-heading: 'Bellefair', serif;
    /* Elegant serif */
    --font-body: 'Barlow', sans-serif;

    --radius: 8px;
    --shadow: 0 0 30px rgba(11, 13, 23, 0.8);
}

/* Import Fonts */
@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@400;700&family=Bellefair&display=swap');

body {
    background-color: var(--bg-body);
    background-image: url('https://assets.codepen.io/1948355/stars.png');
    /* Star texture */
    background-size: cover;
    color: var(--text-main);
    font-family: var(--font-body);
}

/* TYPOGRAPHY */
h1,
h2,
h3 {
    font-family: var(--font-heading);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 4px;
}

.text-gradient {
    color: white;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

/* CARDS */
.theme-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 3rem;
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
}

.theme-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    transform: translateX(-100%);
    transition: 0.5s;
}

.theme-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-active);
}

.theme-card:hover::before {
    transform: translateX(100%);
}

/* BUTTONS */
.btn-theme-primary {
    background: white;
    color: #0b0d17;
    padding: 1.5rem 3rem;
    border-radius: 50%;
    /* Circle button style often used in space themes, or pill */
    border-radius: 0;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.2rem;
    transition: all 0.4s ease;
    position: relative;
    z-index: 1;
}

.btn-theme-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    z-index: -1;
    transform: scale(0);
    transition: 0.4s;
    border-radius: 50%;
}

.btn-theme-primary:hover::after {
    transform: scale(1.5);
    opacity: 0;
}

.btn-theme-secondary {
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 1rem 2rem;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.btn-theme-secondary:hover {
    border-color: white;
}