/* Last Updated: 03/10/2026 */

/* CSS variables */
:root {
    --bg-gradient: linear-gradient(135deg, #0b1b3b, #1f4fa8);
    --accent: #ff9800;
    --accent-dark: #e07c00;
    --light: #f5f5f5;
    --card-bg: rgba(255, 255, 255, 0.08);
    --text-main: #ffffff;
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.4);
    --radius: 10px;
    --transition-fast: 0.2s ease-in-out;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
}

/* Wrapper with max-width and center */
#wrapper {
    max-width: 1100px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.35);
    box-shadow: var(--shadow-soft);
}

/* Header */
header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.tagline {
    margin-top: 5px;
    font-style: italic;
    color: #d0e4ff;
}

/* Navigation */
nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding: 10px 20px 15px;
    background: rgba(0, 0, 0, 0.4);
}

nav a {
    color: var(--light);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: background-color var(--transition-fast),
                transform var(--transition-fast),
                box-shadow var(--transition-fast);
    font-size: 0.95rem;
}

nav a:hover {
    background-color: var(--accent);
    box-shadow: var(--shadow-soft);
    transform: translateY(-2px);
}

/* Main layout: flexbox */
main {
    display: flex;
    flex: 1;
    padding: 20px;
    gap: 20px;
}

/* Sidebar */
aside {
    flex: 1;
    max-width: 280px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

aside h2, aside h3 {
    margin-top: 0;
}

aside ul, aside ol {
    padding-left: 20px;
}

aside img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin-top: 10px;
    border: 2px solid rgba(255, 255, 255, 0.4);
}

/* Article/content */
article {
    flex: 2;
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

article h2 {
    margin-top: 0;
}

/* Highlight box */
.highlight-box,
.strategy-callout {
    background: rgba(0, 0, 0, 0.35);
    border-left: 4px solid var(--accent);
    padding: 10px 15px;
    margin-top: 15px;
    border-radius: var(--radius);
}

/* Table styling */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    background: rgba(0, 0, 0, 0.3);
}

th, td {
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 8px;
    text-align: left;
}

th {
    background: rgba(0, 0, 0, 0.6);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 8px 16px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: background-color var(--transition-fast),
                transform var(--transition-fast),
                box-shadow var(--transition-fast);
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--accent-dark);
    transform: translateY(-1px) scale(1.02);
    box-shadow: var(--shadow-soft);
}

.btn-secondary {
    background-color: #555;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #777;
    transform: translateY(-1px);
}

/* Form elements */
input[type="text"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    background: rgba(0, 0, 0, 0.3);
    color: var(--light);
}

/* Footer */
footer {
    text-align: center;
    padding: 10px 15px 15px;
    font-size: 0.8rem;
    background: rgba(0, 0, 0, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* CodePen-inspired animation: bouncing ball on a court */
.court {
    position: relative;
    width: 200px;
    height: 120px;
    margin: 20px auto 0;
    border-radius: var(--radius);
    background: radial-gradient(circle at center, #f5a623 0, #b76b00 60%, #5a3200 100%);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.ball {
    position: absolute;
    width: 40px;
    height: 40px;
    background: radial-gradient(circle at 30% 30%, #ffcc80, #ff9800);
    border-radius: 50%;
    left: 80px;
    animation: bounce 1s infinite ease-in-out;
}

/* Inspired by CodePen bouncing ball examples */
@keyframes bounce {
    0%   { top: 10px;  transform: scale(1, 1); }
    50%  { top: 60px;  transform: scale(1.1, 0.9); }
    100% { top: 10px;  transform: scale(1, 1); }
}

/* Responsive layout */
@media (max-width: 800px) {
    main {
        flex-direction: column;
    }

    aside {
        max-width: 100%;
    }
}