/* ===== CSS VARIABLES ===== */
:root {
    /* Colors - Inspired by hello-friend-ng theme */
    --bg-primary: #1d1f21;
    --bg-secondary: #282a2e;
    --bg-tertiary: #2d2f33;
    --text-primary: #c5c8c6;
    --text-secondary: #969896;
    --text-dim: #707070;
    --accent-primary: #7c5cff;  /* Violet Spectrum de la v2 */
    --accent-secondary: #8abeb7;
    --accent-hover: #9580ff;
    --border-color: #373b41;
    --link-color: #81a2be;
    --link-hover: #b5bd68;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Layout */
    --max-width: 900px;
    --nav-height: 60px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-medium: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-mono);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--link-hover);
}

strong {
    color: var(--accent-primary);
    font-weight: 600;
}

code {
    font-family: var(--font-mono);
    background: var(--bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border-color);
    z-index: 1000;
    height: var(--nav-height);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

.nav-brand:hover {
    color: var(--accent-primary);
}

.cursor-blink {
    color: var(--accent-primary);
    animation: blink 1s infinite;
    margin-left: 0.2rem;
    display: inline-block;      
    transform: scaleX(1.5);        
}

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

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

.nav-link {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-medium);
}

.nav-link:hover::after {
    width: 100%;
}

/* ===== MAIN CONTAINER ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.content-section {
    min-height: 100vh;
    padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
}

/* ===== HERO SECTION ===== */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-container {
    text-align: center;
    animation: fadeInUp 0.8s ease;
}

.hero-avatar {
    margin-bottom: var(--spacing-md);
}

.avatar-img {
    width: 275px;
    height: 275px;
    border-radius: 50%;
    border: 4px solid var(--accent-primary);
    box-shadow: 0 0 30px rgba(124, 92, 255, 0.3);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.avatar-img:hover {
    transform: scale(1.05);
    box-shadow: 0 0 50px rgba(124, 92, 255, 0.5);
}

.hero-title {
    font-size: 2.3rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.social-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    transition: all var(--transition-medium);
}

.social-icon:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(124, 92, 255, 0.4);
}

.social-icon svg {
    width: 24px;
    height: 24px;
}

/* ===== CONTENT SECTIONS ===== */
.section-title {
    font-size: 2.5rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent-primary);
}

.subsection-title {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.content-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: border-color var(--transition-medium);
}

.content-card:hover {
    border-color: var(--accent-primary);
}

.contact-list {
    list-style: none;
}

.contact-list li {
    padding: var(--spacing-xs) 0;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    display: flex;              
    align-items: center;        
    gap: 0.5rem;             
}

.contact-list strong {
    color: var(--accent-primary);
    min-width: 100px;
    display: inline-block;
    flex-shrink: 0;           
}

.contact-list a {
    margin-left: 0;    
    text-decoration: underline;         
}


/* ===== POSTS SECTION ===== */
.posts-container {
    margin-top: var(--spacing-md);
}

.year-group {
    margin-bottom: var(--spacing-lg);
}

.year-title {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
}

.post-item {
    margin-bottom: var(--spacing-sm);
}

.post-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    transition: all var(--transition-medium);
    font-family: var(--font-mono);
}

.post-link:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateX(5px);
}

.post-title {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.post-date {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.post-separator {
    height: 1px;
    background: var(--border-color);
    margin-top: var(--spacing-sm);
    opacity: 0.3;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 2px solid var(--border-color);
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
    }
    
    .nav-container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-brand {
        font-size: 1rem;
    }
    
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.85rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }
    
    .avatar-img {
        width: 150px;
        height: 150px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .social-icon {
        width: 40px;
        height: 40px;
    }
    
    .post-link {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}

/* ===== SCROLL BEHAVIOR ===== */
html {
    scroll-padding-top: calc(var(--nav-height) + var(--spacing-md));
}

/* ===== SELECTION ===== */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

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

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}