/* ================================
   Base Reset & Defaults
================================ */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    line-height: 1.6;
    padding: 2rem;
}

/* ================================
   Animation Keyframes
================================ */

/* Slide in from left */
@keyframes slideInLeft {
    from {
        transform: translateX(-60px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide in from right */
@keyframes slideInRight {
    from {
        transform: translateX(60px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide in from top */
@keyframes slideInTop {
    from {
        transform: translateY(-60px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Slide in from bottom */
@keyframes slideInBottom {
    from {
        transform: translateY(60px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ================================
   Titles (Centered, from Left)
================================ */
h1, .title {
    text-align: center;
    margin-bottom: 1rem;
    animation: slideInLeft 0.8s ease-out forwards;
    color: #07ffff;
}

/* ================================
   Headings (Centered, from Right)
================================ */
h2, h3, h4, h5, h6, .heading {
    text-align: center;
    margin: 1rem 0;
    animation: slideInRight 0.8s ease-out forwards;
}

/* ================================
   Images (Centered, from Top)
================================ */
img {
    align-self: center;
    display: block;
    margin: 1.5rem auto;
    max-width: 100%;
    height: auto;
    animation: slideInTop 0.9s ease-out forwards;
}

/* ================================
   Paragraphs (From Bottom)
================================ */
p, ul, ol {
    max-width: 700px;
    margin: 0 auto;
    text-align: left;
    animation: slideInBottom 0.9s ease-out forwards;
}

ul, ol {
    max-width: 700px;
    margin: 20px auto;
    padding-left: 40px;
    text-align: left;
}

/* ================================
   Links
================================ */
a {
    color: #52ffff;
    text-decoration: none;
    transition: color 0.2s ease;
}

/* ================================
   Buttons
================================ */

/* Default customizable variables */
button,
.btn {
    --btn-bg: #07bbbb;
    --btn-text: #ffffff;
    --btn-hover-bg: #71f1f1;
    --btn-padding: 0.75rem 1.5rem;
    --btn-radius: 999px;
    --btn-border: none;

    display: block;
    margin: 20px auto;
    padding: var(--btn-padding);
    background: var(--btn-bg);
    color: var(--btn-text);
    border: var(--btn-border);
    border-radius: var(--btn-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 
        transform 0.2s ease,
        background 0.2s ease,
        box-shadow 0.2s ease;
}

/* Hover effect */
button:hover,
.btn:hover {
    background: var(--btn-hover-bg);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Active press effect */
button:active,
.btn:active {
    transform: translateY(0);
    box-shadow: none;
}

/* Optional: Center buttons easily */
.button-center {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}