/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #10b981;
    --color-primary-dark: #059669;
    --color-secondary: #8b5cf6;
    --color-accent: #f59e0b;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.1);
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Header */
.header {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.nav__brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    transition: color 0.2s;
}

.nav__brand:hover {
    color: var(--color-primary);
}

.nav__icon {
    font-size: 1.5rem;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    gap: 4px;
}

.nav__toggle-line {
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav__link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all 0.2s;
    position: relative;
}

.nav__link:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

.nav__dropdown {
    position: relative;
}

.nav__submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    list-style: none;
    padding: var(--spacing-sm) 0;
}

.nav__dropdown:hover .nav__submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav__submenu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    transition: background-color 0.2s;
}

.nav__submenu a:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-primary);
}

/* Main content */
.main {
    min-height: calc(100vh - 8rem);
    padding: var(--spacing-2xl) 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-xl);
}

h4 {
    font-size: 1.25rem;
    margin-top: var(--spacing-lg);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Lists */
ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Code */
code {
    background-color: var(--color-bg-alt);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
}

pre {
    background-color: var(--color-bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-border);
}

pre code {
    background: none;
    padding: 0;
    color: var(--color-text);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: var(--spacing-md) 0;
}

/* Cards */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.card__meta {
    font-size: 0.875rem;
    color: var(--color-text-light);
    display: flex;
    gap: var(--spacing-md);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.grid--2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid--2x2 {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

/* Sections - inspired by cassie.codes */
.sections {
    display: flex;
    flex-direction: column;
}

.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-2xl) 0;
}

@media (max-width: 768px) {
    .section {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
}

.section__content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.section__text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.section__title {
    font-size: 3rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.1;
}

.section__description {
    font-size: 1.25rem;
    line-height: 1.6;
    margin: 0;
}

.section__link {
    display: inline-block;
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    color: inherit;
    border-bottom: 2px solid currentColor;
    padding-bottom: 2px;
    transition: all 0.2s ease;
    align-self: flex-start;
}

.section__link:hover {
    transform: translateX(4px);
}

.section__image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.placeholder-image {
    font-size: 8rem;
    opacity: 0.3;
    filter: grayscale(100%);
}

/* Section-specific colors */
.section--wrenching {
    background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
    color: white;
}

.section--coding {
    background: linear-gradient(135deg, #4ecdc4, #6dd5ed);
    color: white;
}

.section--microelectronics {
    background: linear-gradient(135deg, #45b7d1, #96c7ed);
    color: white;
}

.section--general {
    background: linear-gradient(135deg, #f9ca24, #f0932b);
    color: white;
}

/* Responsive design */
@media (max-width: 768px) {
    .section__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section__title {
        font-size: 2.5rem;
    }
    
    .placeholder-image {
        font-size: 6rem;
    }
}

/* Hero section */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.hero__title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: black;
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

/* Text Animation */
.text-animation {
    margin: var(--spacing-lg) 0;
    min-height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.text-animation__container {
    position: relative;
    display: inline-block;
}

.text-animation__word {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: inline-block;
    min-width: 200px;
    text-align: center;
    position: relative;
}

.text-animation__word::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--color-primary);
    font-weight: 300;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.text-animation__letter {
    display: inline-block;
    animation: letterAppear 0.1s ease-in-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes letterAppear {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.text-animation__letter.typing {
    animation: letterType 0.05s ease-in-out forwards;
}

@keyframes letterType {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
}

.footer__social a {
    color: var(--color-text-light);
    transition: color 0.2s;
}

.footer__social a:hover {
    color: var(--color-primary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav__container {
        height: 4rem;
        padding: 0 var(--spacing-md);
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .nav__menu--open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__link {
        display: block;
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
        margin-bottom: var(--spacing-xs);
    }
    
    .nav__submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--color-bg-alt);
        margin: var(--spacing-sm) 0 0 var(--spacing-md);
        padding: 0;
    }
    
    .nav__submenu a {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .footer__container {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .grid--2,
    .grid--3 {
        grid-template-columns: 1fr;
    }
    
    /* Improve touch targets */
    .nav__link,
    .section__link,
    .card {
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    /* Better mobile typography */
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .section__title {
        font-size: 2rem;
    }
    
    .section__description {
        font-size: 1.1rem;
    }
    
    /* Better spacing for mobile */
    .main {
        padding: var(--spacing-lg) 0;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section__content {
        padding: 0 var(--spacing-sm);
        gap: var(--spacing-lg);
    }
}

/* Extra small screens */
@media (max-width: 480px) {
    .hero__title {
        font-size: 1.75rem;
    }
    
    .section__title {
        font-size: 1.75rem;
    }
    
    .section__description {
        font-size: 1rem;
    }
    
    .nav__container {
        padding: 0 var(--spacing-sm);
    }
    
    .container {
        padding: 0 var(--spacing-xs);
    }
}

/* Tag System */
.tag {
    display: inline-block;
    background: var(--color-bg-alt);
    color: var(--color-text);
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    margin: 0.125rem;
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tag:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.tag--large {
    font-size: 1rem;
    padding: 0.5rem 1rem;
}

.tag--medium {
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
}

.tag--small {
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
}

.tag--related {
    background: var(--color-primary);
    color: white;
}

.tag--related:hover {
    background: var(--color-primary-dark);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
    justify-content: center;
}

/* Related Content */
.related-content {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
}

.related-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.related-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.related-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.related-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.related-card p {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin: 0;
}

/* Tag Navigation */
.tag-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius);
}

.tag-filter {
    background: var(--color-bg);
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    border: 1px solid var(--color-border);
    transition: all 0.2s ease;
}

.tag-filter:hover,
.tag-filter.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Tag Pages */
.tag-page {
    margin: var(--spacing-xl) 0;
}

.tag-page h1 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.tag-page .tag-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
    line-height: 1.6;
}

.tag-page .tag-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.tag-stat {
    text-align: center;
    flex: 1;
}

.tag-stat .number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
}

.tag-stat .label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.related-tags {
    margin: var(--spacing-xl) 0;
}

.related-tags h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.tag-content {
    margin: var(--spacing-xl) 0;
}

.tag-content h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.card-tags {
    margin-top: var(--spacing-sm);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

/* Backlinks */
.backlinks {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
}

.backlinks h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.backlinks ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.backlinks li {
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.backlinks a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.backlinks a:hover {
    text-decoration: underline;
}

/* Tag Graph Visualization */
.tag-graph {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.tag-graph svg {
    max-width: 100%;
    height: auto;
}

/* Mobile Tag Styles */
@media (max-width: 768px) {
    .tag-cloud {
        justify-content: flex-start;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .tag-nav {
        justify-content: center;
    }
    
    .tag-page .tag-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

/* Model Viewer Styling */
model-viewer {
    --poster-color: transparent;
}

/* Ensure model-viewer background-color attribute works */
model-viewer[background-color] {
    background-color: var(--background-color, #f5f5f5) !important;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #f9fafb;
        --color-text-light: #d1d5db;
        --color-bg: #111827;
        --color-bg-alt: #1f2937;
        --color-border: #374151;
    }
}