/* ================================================
   90s Industrial Design CSS
   Primary Colors + Industrial Aesthetics
   ================================================ */

:root {
    --primary-red: #ff6666;
    --primary-blue: #5599ff;
    --primary-yellow: #FFFF00;
    --primary-green: #55ff88;
    --primary-cyan: #00FFFF;
    --primary-magenta: #FF00FF;

    --industrial-gray: #808080;
    --industrial-dark: #333333;
    --industrial-light: #CCCCCC;
    --industrial-silver: #C0C0C0;

    --warning-orange: #ff8844;
    --grid-color: #666666;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Courier New', monospace;
    background: var(--industrial-dark);
    color: #00FF00;
    line-height: 1.6;
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(0, 255, 0, 0.03) 2px,
            rgba(0, 255, 0, 0.03) 4px
        );
}

/* Header Styles */
header {
    background: linear-gradient(180deg, var(--industrial-silver) 0%, var(--industrial-gray) 100%);
    border-bottom: 5px solid var(--primary-yellow);
    padding: 20px;
    position: relative;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
}

/* Page-specific header colors */
.page-home header {
    border-bottom-color: var(--industrial-silver);
}

.page-intro header {
    border-bottom-color: var(--primary-yellow);
}

.page-examples header {
    border-bottom-color: var(--primary-cyan);
}

.page-comparison header {
    border-bottom-color: var(--primary-red);
}

.page-antipatterns header {
    border-bottom-color: var(--warning-orange);
}

.page-conclusions header {
    border-bottom-color: var(--primary-green);
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg,
        var(--primary-red) 0%,
        var(--primary-blue) 33%,
        var(--primary-yellow) 66%,
        var(--primary-green) 100%);
}

h1 {
    color: var(--industrial-dark);
    text-align: center;
    font-size: 2.5em;
    text-shadow:
        2px 2px 0 var(--primary-red),
        4px 4px 0 var(--primary-blue),
        6px 6px 0 var(--primary-yellow);
    letter-spacing: 3px;
    margin-bottom: 10px;
}

.tagline {
    text-align: center;
    color: var(--industrial-dark);
    font-size: 1.2em;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Navigation */
nav {
    background: transparent;
    border: none;
    margin: 20px auto;
    max-width: 1200px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

nav li {
    flex: 0 0 auto;
}

nav a {
    display: inline-block;
    padding: 12px 15px;
    min-width: 150px;
    text-align: center;
    text-decoration: none;
    color: var(--industrial-dark);
    font-weight: bold;
    font-size: 1.1em;
    text-transform: uppercase;
    border: 3px solid var(--industrial-dark);
    transition: all 0.3s;
    position: relative;
    box-shadow: 4px 4px 0 var(--industrial-dark);
}

/* Page-specific navigation background colors */
nav a[href="index.html"] {
    background: var(--industrial-silver);
}

nav a[href="introduction.html"] {
    background: var(--primary-yellow);
}

nav a[href="examples.html"] {
    background: var(--primary-cyan);
    color: var(--industrial-dark);
}

nav a[href="comparison.html"] {
    background: var(--primary-red);
    color: white;
}

nav a[href="anti-patterns.html"] {
    background: var(--warning-orange);
}

nav a[href="conclusions.html"] {
    background: var(--primary-green);
}

nav a:hover {
    background: #FFB6A3;
    color: var(--industrial-dark);
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--industrial-dark);
}

/* Active page indicators */
.page-home nav a[href="index.html"],
.page-intro nav a[href="introduction.html"],
.page-examples nav a[href="examples.html"],
.page-comparison nav a[href="comparison.html"],
.page-antipatterns nav a[href="anti-patterns.html"],
.page-conclusions nav a[href="conclusions.html"] {
    border-color: #ff9999;
    box-shadow: 4px 4px 0 #ff9999;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
}

/* Panel System */
.panel {
    background: rgba(0, 0, 0, 0.8);
    border: 4px solid var(--industrial-silver);
    border-radius: 0;
    padding: 20px;
    margin: 20px 0;
    position: relative;
    box-shadow:
        0 0 20px rgba(0, 255, 0, 0.2),
        inset 0 0 20px rgba(0, 0, 0, 0.3);
}

.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg,
        var(--primary-red),
        var(--primary-blue),
        var(--primary-yellow));
}

.panel-header {
    font-size: 1.8em;
    color: var(--primary-yellow);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--primary-cyan);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.panel-header .icon {
    display: inline-block;
    width: 30px;
    height: 30px;
    margin-right: 10px;
    vertical-align: middle;
}

/* Technology Cards */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.tech-card {
    background: rgba(0, 0, 0, 0.9);
    border: 4px solid var(--industrial-silver);
    padding: 20px;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    height: 6px;
}

.tech-card.cobol::before {
    background: var(--primary-red);
}

.tech-card.sql::before {
    background: var(--primary-blue);
}

.tech-card.mongodb::before {
    background: var(--primary-green);
}

.tech-card h3 {
    font-size: 2em;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.tech-card.cobol h3 {
    color: var(--primary-red);
    text-shadow: 2px 2px 4px rgba(255, 0, 0, 0.5);
}

.tech-card.sql h3 {
    color: var(--primary-blue);
    text-shadow: 2px 2px 4px rgba(0, 0, 255, 0.5);
}

.tech-card.mongodb h3 {
    color: var(--primary-green);
    text-shadow: 2px 2px 4px rgba(0, 255, 0, 0.5);
}

.tech-card p {
    color: var(--industrial-light);
    margin: 10px 0;
    line-height: 1.8;
}

.tech-card > .button {
    margin-top: auto;
    align-self: center;
}

.tech-card .year {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 3em;
    font-weight: bold;
    opacity: 0.2;
}

/* Code Blocks */
pre {
    background: #000;
    border: 3px solid var(--grid-color);
    padding: 15px;
    overflow-x: auto;
    margin: 15px 0;
    position: relative;
    box-shadow: inset 0 0 10px rgba(0, 255, 0, 0.2);
}

code {
    font-family: 'Courier New', monospace;
    color: var(--primary-green);
    font-size: 0.95em;
}

.code-header {
    background: var(--industrial-silver);
    color: var(--industrial-dark);
    padding: 5px 10px;
    font-weight: bold;
    font-size: 0.9em;
    text-transform: uppercase;
    margin: -15px -15px 15px -15px;
    border-bottom: 2px solid var(--primary-yellow);
}

/* Comparison Table */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: rgba(0, 0, 0, 0.8);
}

th {
    background: var(--industrial-silver);
    color: var(--industrial-dark);
    padding: 12px;
    text-align: left;
    font-weight: bold;
    text-transform: uppercase;
    border: 2px solid var(--grid-color);
}

td {
    padding: 12px;
    border: 2px solid var(--grid-color);
    color: var(--industrial-light);
}

tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.05);
}

tr:hover {
    background: rgba(255, 255, 0, 0.1);
}

/* Buttons */
.button {
    display: inline-block;
    padding: 12px 30px;
    background: var(--industrial-silver);
    color: var(--industrial-dark);
    text-decoration: none;
    font-weight: bold;
    text-transform: uppercase;
    border: 3px solid var(--industrial-dark);
    transition: all 0.3s;
    margin: 5px;
    box-shadow: 4px 4px 0 var(--industrial-dark);
}

.button:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--industrial-dark);
}

.button.primary {
    background: var(--primary-yellow);
    border-color: var(--industrial-dark);
}

.button.blue {
    background: var(--primary-blue);
    color: white;
    border-color: var(--industrial-dark);
}

.button.danger {
    background: var(--primary-red);
    color: white;
}

.button.success {
    background: var(--primary-green);
    color: var(--industrial-dark);
}

/* Visual Diagram */
.diagram {
    background: rgba(0, 0, 0, 0.9);
    border: 3px solid var(--grid-color);
    padding: 30px;
    margin: 20px 0;
    position: relative;
}

.diagram-row {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin: 20px 0;
    flex-wrap: wrap;
}

.diagram-box {
    background: rgba(128, 128, 128, 0.3);
    border: 3px solid;
    padding: 20px;
    min-width: 200px;
    text-align: center;
    position: relative;
    margin: 10px;
}

.diagram-box.cobol {
    border-color: var(--primary-red);
    color: var(--primary-red);
}

.diagram-box.sql {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.diagram-box.mongodb {
    border-color: var(--primary-green);
    color: var(--primary-green);
}

.diagram-arrow {
    color: var(--primary-yellow);
    font-size: 2em;
    margin: 0 10px;
}

/* Footer */
footer {
    background: var(--industrial-gray);
    border-top: 5px solid var(--primary-cyan);
    padding: 20px;
    text-align: center;
    margin-top: 40px;
    color: var(--industrial-light);
}

/* Page-specific footer colors */
.page-home footer {
    border-top-color: var(--industrial-silver);
}

.page-intro footer {
    border-top-color: var(--primary-yellow);
}

.page-examples footer {
    border-top-color: var(--primary-cyan);
}

.page-comparison footer {
    border-top-color: var(--primary-red);
}

.page-antipatterns footer {
    border-top-color: var(--warning-orange);
}

.page-conclusions footer {
    border-top-color: var(--primary-green);
}

footer::before {
    content: '';
    display: block;
    height: 3px;
    background: linear-gradient(90deg,
        var(--primary-red),
        var(--primary-blue),
        var(--primary-yellow),
        var(--primary-green));
    margin-bottom: 20px;
}

/* Animated Border Effect */
@keyframes border-pulse {
    0%, 100% {
        border-color: var(--primary-red);
    }
    33% {
        border-color: var(--primary-blue);
    }
    66% {
        border-color: var(--primary-yellow);
    }
}

.pulse-border {
    animation: border-pulse 3s infinite;
}

/* Scanline Effect */
@keyframes scanline {
    0% {
        transform: translateY(-100%);
    }
    100% {
        transform: translateY(100%);
    }
}

.scanline {
    position: relative;
    overflow: hidden;
}

.scanline::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    animation: scanline 8s linear infinite;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.8em;
        text-shadow:
            1px 1px 0 var(--primary-red),
            2px 2px 0 var(--primary-blue),
            3px 3px 0 var(--primary-yellow);
    }

    nav ul {
        flex-direction: column;
        align-items: center;
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .diagram-row {
        flex-direction: column;
    }

    .diagram-arrow {
        transform: rotate(90deg);
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-red {
    color: var(--primary-red);
}

.text-blue {
    color: var(--primary-blue);
}

.text-yellow {
    color: var(--primary-yellow);
}

.text-green {
    color: var(--primary-green);
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}