/* ==========================================================================
   DESIGN SYSTEM - OLD TYPE THEME (MINIMAL & ULTRA-FAST)
   ========================================================================== */

/* Typography Imports */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;0,600;1,400&family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');

:root {
    /* Color Palette - Light Theme (Warm Paper / Editorial) */
    --bg-color: #f9f6f0;
    --text-color: #1e1b18;
    --text-muted: #756d64;
    --border-color: #e6dfd5;
    --card-bg: #f1ebd8;
    --accent-blue: #a34e36;
    --accent-blue-hover: #be5f44;
    --selection-bg: #e6dfd5;
    
    /* Layout */
    --container-width: 740px;
    --transition-speed: 0.3s;
    --transition-timing: cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Font Stacks */
    --font-serif: 'Roboto', -apple-system, sans-serif;
    --font-mono: 'IBM Plex Mono', Courier, monospace;
    --font-sans: 'Roboto', -apple-system, sans-serif;
}

/* Premium Dark Mode Variables */
.dark-mode {
    --bg-color: #12100e;
    --text-color: #f3eee7;
    --text-muted: #9e968c;
    --border-color: #2b2621;
    --card-bg: #1a1715;
    --accent-blue: #dc765a;
    --accent-blue-hover: #eb8d75;
    --selection-bg: #2b2621;
}

/* Base resets & styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

::selection {
    background-color: var(--selection-bg);
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-color);
}

body {
    font-family: var(--font-serif);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.75;
    font-size: 1.05rem;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed) var(--transition-timing),
                color var(--transition-speed) var(--transition-timing);
    overflow-y: scroll;
}

/* App Layout Container */
.app-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
header {
    padding: 3rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 3.5rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

.logo-container:hover {
    opacity: 0.85;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
    transition: transform 0.5s var(--transition-timing);
}

.logo-container:hover .avatar {
    transform: rotate(5deg) scale(1.05);
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    font-family: var(--font-sans);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s ease;
    padding: 0.25rem 0;
    position: relative;
}

nav a:hover, 
nav a.active {
    color: var(--text-color);
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
}

/* Minimalist Theme Toggle Button */
#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    padding: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    transition: background-color var(--transition-speed) ease, 
                color var(--transition-speed) ease, 
                transform 0.15s ease;
    outline: none;
}

#theme-toggle:hover {
    background-color: var(--card-bg);
    transform: scale(1.05);
}

#theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon-sun,
.theme-icon-moon {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-speed) var(--transition-timing), 
                transform var(--transition-speed) var(--transition-timing);
}

/* Light/Dark Toggle Transitions */
html:not(.dark-mode) .theme-icon-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}
html:not(.dark-mode) .theme-icon-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}
html.dark-mode .theme-icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}
html.dark-mode .theme-icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

/* Main Content Area */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Sub-page/View Header */
.section-header {
    margin-bottom: 2.5rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Home Section Styles */
.intro-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3.5rem;
    gap: 1.5rem;
}

.intro-text h1 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 1.5rem;
}

.intro-text p {
    font-size: 1.15rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.intro-text a, 
.view-all-link {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    border-bottom: 1px solid var(--text-color);
    padding-bottom: 2px;
    transition: opacity 0.2s ease, border-color 0.2s ease;
}

.intro-text a:hover, 
.view-all-link:hover {
    opacity: 0.75;
    border-color: transparent;
}

/* Home Section Layout */
.section-divider {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 2rem;
}

.section-divider h2 {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
    color: var(--text-muted);
}

/* Newsletter / Subscribe Box (Daniel's Style) */
.subscribe-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 3rem;
    text-align: center;
}

.subscribe-box p {
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.subscribe-form {
    display: flex;
    gap: 0.5rem;
    max-width: 480px;
    margin: 0 auto;
}

.subscribe-input {
    flex: 1;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.subscribe-input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.subscribe-button {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    color: #ffffff;
    background-color: var(--accent-blue);
    border: none;
    border-radius: 6px;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.subscribe-button:hover {
    background-color: var(--accent-blue-hover);
}

.subscribe-button:active {
    transform: scale(0.98);
}

/* Blog Cards List */
.blog-cards {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.blog-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.75rem;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: transform var(--transition-speed) var(--transition-timing),
                border-color var(--transition-speed) var(--transition-timing),
                box-shadow var(--transition-speed) var(--transition-timing);
}

.blog-card:hover {
    transform: translateY(-2px);
    border-color: var(--text-muted);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.blog-card h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.3;
    transition: color 0.2s ease;
}

.blog-card:hover h3 {
    color: var(--accent-blue);
}

.blog-card-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.blog-card-meta .dot {
    font-size: 0.5rem;
    color: var(--border-color);
}

/* Individual Post Template Styles */
.post-header {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2rem;
}

.post-back-link {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
    transition: color 0.2s ease;
}

.post-back-link:hover {
    color: var(--text-color);
}

.post-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.75px;
    margin-bottom: 1rem;
}

.post-meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.post-body {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-color);
    max-width: 100%;
}

.post-body p {
    margin-bottom: 1.75rem;
}

.post-body h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.25px;
}

.post-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.post-body blockquote {
    border-left: 3px solid var(--text-color);
    padding-left: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-muted);
}

.post-body ul, .post-body ol {
    margin-bottom: 1.75rem;
    padding-left: 1.5rem;
}

.post-body li {
    margin-bottom: 0.5rem;
}

.post-body strong {
    font-weight: 600;
}

/* About Page Specific Styles */
.about-layout {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 3.5rem;
    margin-bottom: 3.5rem;
}

.about-bio {
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-bio p {
    margin-bottom: 1.5rem;
}

.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-avatar-container {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
}

.about-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.05);
    transition: filter 0.5s ease, transform 0.5s var(--transition-timing);
}

.about-avatar-container:hover .about-avatar {
    filter: grayscale(0%) contrast(1);
    transform: scale(1.02);
}

/* Experience List (Daniel's Style) */
.experience-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.experience-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.experience-icon {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-color);
    flex-shrink: 0;
}

.experience-info {
    flex: 1;
}

.experience-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.experience-meta {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.experience-desc {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Contact Page Specific Styles */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.contact-details {
    margin-bottom: 2rem;
}

.contact-details p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.contact-social-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.contact-social-link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: fit-content;
    border-bottom: 1px dashed var(--border-color);
    padding-bottom: 2px;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.contact-social-link:hover {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem 1rem;
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.submit-button {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: #ffffff;
    background-color: var(--accent-blue);
    border: none;
    border-radius: 6px;
    padding: 0.9rem 1.5rem;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
    align-self: flex-start;
}

.submit-button:hover {
    background-color: var(--accent-blue-hover);
}

.submit-button:active {
    transform: scale(0.98);
}

/* Page Footer */
footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

footer a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease, color 0.2s ease;
}

footer a:hover,
footer a.active {
    color: var(--text-color);
    border-color: var(--text-color);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-links .separator {
    color: var(--border-color);
}

/* Base Page Load Animation (CSS-only fallback, smooth opacity) */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.5s var(--transition-timing) forwards;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    header {
        padding: 2rem 0;
        margin-bottom: 2.5rem;
    }
    
    .logo-text {
        font-size: 0.95rem;
    }
    
    .avatar {
        width: 32px;
        height: 32px;
    }
    
    .header-right {
        gap: 1.25rem;
    }
    
    nav {
        gap: 1rem;
    }
    
    nav a {
        font-size: 0.85rem;
    }
    
    .section-title, .intro-text h1 {
        font-size: 1.85rem;
    }
    
    .intro-container {
        flex-direction: column-reverse;
        gap: 2rem;
        margin-bottom: 2.5rem;
    }
    
    .about-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .about-sidebar {
        max-width: 280px;
        margin: 0 auto;
    }
    
    .post-title {
        font-size: 1.85rem;
    }
    
    .subscribe-box {
        padding: 1.5rem;
    }
    
    .subscribe-form {
        flex-direction: column;
    }
    
    .subscribe-button {
        justify-content: center;
    }
    
    footer {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
        padding: 2.5rem 0;
    }
}