/*
===============================================================================
Adi's Personal Website - Enhanced Minimalist Design
===============================================================================
Premium typography, refined color palette, and mathematical spacing system
for an elegant, readable, and professional personal website.
===============================================================================
*/

/* ==========================================================================
   FONTS & EXTERNAL RESOURCES
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Crimson+Text:ital,wght@0,400;0,600;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* ==========================================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ========================================================================== */

:root {
    /* Light Mode - Warm undertones */
    --background-color: #fefefe;
    --text-color: #2c2c2c;
    --text-secondary: #5a5a5a;
    --text-tertiary: #888888;
    --border-color: #f0f0f0;
    --hover-color: #f8f8f8;
    --accent-color: #6b7280;
    --accent-hover: #4b5563;
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.08);
    
    /* Typography Scale - Golden Ratio Based */
    --font-serif: 'Crimson Text', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing - Mathematical Progression */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2.25rem;
    --space-xxl: 3.375rem;
    --space-xxxl: 5rem;
    
    /* Layout */
    --content-width: 42rem; /* Golden ratio optimization */
    --content-width-wide: 65rem;
}

/* Dark Mode - Cool undertones */
[data-theme="dark"] {
    --background-color: #0f0f0f;
    --text-color: #e8e8e8;
    --text-secondary: #b8b8b8;
    --text-tertiary: #888888;
    --border-color: #1a1a1a;
    --hover-color: #1a1a1a;
    --accent-color: #9ca3af;
    --accent-hover: #d1d5db;
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 18px; /* Slightly larger base size */
    line-height: 1.6;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-xl);
    font-weight: 400;
}

h2 {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

p {
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    color: var(--text-color);
}

/* ==========================================================================
   LAYOUT & STRUCTURE
   ========================================================================== */
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
header {
    padding: var(--space-xxl) 0 var(--space-xl);
    background-color: var(--background-color);
    position: relative;
}

/* Navigation Enhancement */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-content {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color 0.2s ease;
}

.logo:hover {
    color: var(--accent-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    transition: color 0.2s ease;
    position: relative;
}

nav a:hover {
    color: var(--accent-color);
}

nav a.active {
    color: var(--text-color);
    font-weight: 500;
}

/* Main Content with Enhanced Spacing */
main {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-xxl) var(--space-lg) var(--space-xxxl);
    line-height: 1.7;
}

/* ==========================================================================
   THOUGHTS & QUOTES COMPONENTS
   ========================================================================== */
.thoughts-list {
    margin-top: var(--space-xl);
}

.thought-item {
    margin-bottom: var(--space-xxl);
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.6s ease forwards;
}

.thought-item:nth-child(1) { animation-delay: 0.1s; }
.thought-item:nth-child(2) { animation-delay: 0.2s; }
.thought-item:nth-child(3) { animation-delay: 0.3s; }
.thought-item:nth-child(4) { animation-delay: 0.4s; }
.thought-item:nth-child(5) { animation-delay: 0.5s; }

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

.thought-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    padding: var(--space-md);
    margin: calc(var(--space-md) * -1);
    border-radius: 8px;
    position: relative;
}

.thought-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--hover-color);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.thought-link:hover::before {
    opacity: 1;
}

.thought-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.thought-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
    gap: var(--space-lg);
}

.thought-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
    flex: 1;
}

.thought-date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    margin-top: 0.2rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.thought-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* Enhanced Quotes */
.quotes-list {
    margin-top: var(--space-xl);
}

.quote-item {
    margin-bottom: var(--space-xxl);
    opacity: 0;
    transform: translateY(10px);
    animation: fadeInUp 0.6s ease forwards;
}

.quote-item:nth-child(1) { animation-delay: 0.1s; }
.quote-item:nth-child(2) { animation-delay: 0.2s; }
.quote-item:nth-child(3) { animation-delay: 0.3s; }
.quote-item:nth-child(4) { animation-delay: 0.4s; }
.quote-item:nth-child(5) { animation-delay: 0.5s; }

.quote-content {
    display: block;
    padding: var(--space-lg);
    border-left: 3px solid var(--accent-color);
    background: linear-gradient(135deg, var(--hover-color) 0%, transparent 100%);
    border-radius: 0 8px 8px 0;
    position: relative;
}

.quote-content::before {
    content: '"';
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--accent-color);
    position: absolute;
    top: -0.5rem;
    left: -0.5rem;
    opacity: 0.3;
    line-height: 1;
}

.quote-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-lg);
    gap: var(--space-lg);
}

.quote-text {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
    font-style: italic;
    flex: 1;
    font-weight: 400;
}

.quote-date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    white-space: nowrap;
    margin-top: 0.2rem;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.quote-author {
    display: block;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
    font-style: normal;
}

.quote-source {
    display: block;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-style: italic;
}

/* Enhanced Theme Toggle */
.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    padding: var(--space-sm) var(--space-md);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.theme-toggle:hover {
    border-color: var(--accent-color);
    background-color: var(--accent-color);
    color: var(--background-color);
    transform: scale(1.05);
}

/* ==========================================================================
   FOOTER & SOCIAL LINKS
   ========================================================================== */
footer {
    margin-top: var(--space-xxxl);
    padding: var(--space-xxl) 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.social-links a {
    color: var(--text-secondary);
    transition: all 0.3s ease;
    padding: var(--space-sm);
    border-radius: 50%;
}

.social-links a:hover {
    color: var(--accent-color);
    background-color: var(--hover-color);
    transform: translateY(-2px);
}

/* Enhanced Blog Post Content */
.blog-header {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-xl);
}

.blog-header h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--text-color);
    margin: 0 0 var(--space-sm) 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.post-date {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
    display: block;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.post-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-weight: 400;
}

.blog-content {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.blog-content h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    font-weight: 400;
}

.blog-meta {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: var(--space-xxl);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.blog-content p {
    margin-bottom: var(--space-lg);
    line-height: 1.75;
}

.blog-content blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg) var(--space-xl);
    border-left: 3px solid var(--accent-color);
    background: var(--hover-color);
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

.blog-content code {
    background-color: var(--hover-color);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'SF Mono', Monaco, monospace;
}

.blog-content pre {
    background-color: var(--hover-color);
    padding: var(--space-lg);
    border-radius: 8px;
    overflow-x: auto;
    margin: var(--space-xl) 0;
    box-shadow: var(--shadow-subtle);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 768px) {
    :root {
        --content-width: 100%;
        --space-lg: 1rem;
        --space-xl: 1.5rem;
        --space-xxl: 2rem;
        --space-xxxl: 3rem;
    }
    
    html {
        font-size: 16px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    nav {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .nav-content {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    nav ul {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .thought-header,
    .quote-header {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .thought-date,
    .quote-date {
        align-self: flex-start;
    }
    
    .thought-item,
    .quote-item {
        margin-bottom: var(--space-xl);
    }
    
    .quote-content::before {
        font-size: 3rem;
        top: -0.3rem;
        left: -0.3rem;
    }
}

@media (max-width: 480px) {
    :root {
        --space-lg: 0.75rem;
        --space-xl: 1.25rem;
        --space-xxl: 1.75rem;
        --space-xxxl: 2.5rem;
    }
    
    header {
        padding: var(--space-xl) 0;
    }
    
    .thought-title,
    .quote-text {
        font-size: 1.1rem;
    }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
    * {
        background: none !important;
        color: black !important;
        box-shadow: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    .theme-toggle,
    nav,
    footer {
        display: none;
    }
}