/* Global Dark Theme */
body {
    margin: 0;
    padding: 0;
    background-color: #0a0a0f;
    color: #e6e6f0;
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.6;
}

/* Navigation Bar */
nav {
    background-color: #11111a;
    padding: 15px 30px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid #1f1f2e;

    display: flex;
    align-items: center;
    gap: 20px;
}

/* FIX: Prevent global img rule from breaking the nav icon */
nav img {
    height: 32px;
    width: 32px;
    margin: 0;
    padding: 0;
    display: inline-block;
    box-shadow: none;
    border-radius: 0;
}

/* Navigation links */
nav a {
    color: #9bbcff;
    margin-right: 25px;
    text-decoration: none;
    font-size: 1rem;
    transition: 0.2s;
}

nav a:hover {
    color: #d6a8ff;
}

/* Page Container */
.container {
    max-width: 900px;
    margin: 0 auto 60px auto;
    padding: 140px 20px 0 20px;
}

/* Headings */
h1, h2, h3 {
    color: #bcd4ff;
    font-weight: 300;
}

h1 {
    font-size: 2.4rem;
    margin-bottom: 10px;
}

h2 {
    font-size: 1.8rem;
    margin-top: 40px;
}

/* FIX: Global image styling (does NOT affect nav icon anymore) */
img {
    width: 100%;
    max-width: 700px;
    display: block;
    margin: 30px auto;
    border-radius: 6px;
    box-shadow: 0 0 20px rgba(100, 150, 255, 0.25);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 0;
    color: #666;
    font-size: 0.9rem;
}

/* Links */
a {
    color: #9bbcff;
}

a:hover {
    color: #d6a8ff;
}

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.gallery-grid img {
    max-width: 100%;
    border-radius: 6px;
    box-shadow: 0 0 15px rgba(120, 120, 255, 0.25);
}

/* Existing full diagram class */
.full-diagram {
    width: 90%;
    max-width: 900px;
    display: block;
    margin: 20px auto;
    border-radius: 6px;
}

.caption {
    text-align: center;
    font-size: 0.9em;
    color: #ccc;
    margin-top: 8px;
}

.diagram-block {
    margin-bottom: 40px;
}

/* ------------------------------------------------------ */
/* Theory Page Diagram Classes */
/* ------------------------------------------------------ */

.diagram-wide img {
    width: 90%;
    max-width: 1000px;
    margin: 30px auto;
}

.diagram-medium img {
    width: 70%;
    max-width: 800px;
    margin: 30px auto;
}

figure {
    margin: 40px auto;
    text-align: center;
}

figcaption {
    margin-top: 10px;
    font-size: 0.9rem;
    color: #c8c8d8;
    line-height: 1.4;
    max-width: 85%;
    margin-left: auto;
    margin-right: auto;
}

.diagram-wide img,
.diagram-medium img {
    box-shadow: 0 0 25px rgba(100, 150, 255, 0.35);
}