/* 
========================================================================
   Supreem Rijal Portfolio Stylesheet - Premium & High-Performance
========================================================================
*/

/* --- Design Tokens & CSS Variables --- */
:root {
    /* Font Choices */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', "SFMono-Regular", Consolas, "Liberation Mono", Courier, monospace;

    /* Transition Speeds */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);

    /* Spacing rules */
    --container-max: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --z-navbar: 1000;
    --z-particles: 1;
    --z-content: 10;
}

/* --- Dark Theme Variables (Primary) --- */
[data-theme="dark"] {
    --bg-main: #070a13;
    --bg-surface: #0e1626;
    --bg-surface-glass: rgba(14, 22, 38, 0.7);
    --bg-card: #131d30;
    
    --border-color: rgba(255, 255, 255, 0.05);
    --border-color-glow: rgba(6, 182, 212, 0.3);
    
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --text-muted-dark: #64748b;
    
    --color-primary: #8b5cf6; /* Cyber Purple */
    --color-primary-rgb: 139, 92, 246;
    --color-secondary: #06b6d4; /* Neon Cyan */
    --color-secondary-rgb: 6, 182, 212;
    --color-accent: #ec4899; /* Neon Pink */
    
    --glow-shadow: 0 0 25px rgba(6, 182, 212, 0.15);
    --glow-shadow-purple: 0 0 25px rgba(139, 92, 246, 0.2);
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    
    --gradient-hero: radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
                     radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
    --gradient-accent: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --scrollbar-thumb: #334155;
    --scrollbar-track: #070a13;
}

/* --- Light Theme Variables (Toggleable) --- */
[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-glass: rgba(255, 255, 255, 0.8);
    --bg-card: #f1f5f9;
    
    --border-color: rgba(0, 0, 0, 0.06);
    --border-color-glow: rgba(37, 99, 235, 0.2);
    
    --text-primary: #0f172a;
    --text-muted: #475569;
    --text-muted-dark: #94a3b8;
    
    --color-primary: #6366f1; /* Royal Indigo */
    --color-primary-rgb: 99, 102, 241;
    --color-secondary: #3b82f6; /* Vibrant Cobalt Blue */
    --color-secondary-rgb: 59, 130, 246;
    --color-accent: #0d9488; /* Muted Teal */
    
    --glow-shadow: 0 0 25px rgba(59, 130, 246, 0.12);
    --glow-shadow-purple: 0 0 25px rgba(99, 102, 241, 0.12);
    --card-shadow: 0 10px 30px -15px rgba(15, 23, 42, 0.08);
    
    --gradient-hero: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.06) 0%, transparent 40%),
                     radial-gradient(circle at 90% 80%, rgba(59, 130, 246, 0.06) 0%, transparent 40%);
    --gradient-accent: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --scrollbar-thumb: #cbd5e1;
    --scrollbar-track: #f8fafc;
}

/* --- Global Resets & Basics --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-heading);
    background-color: var(--bg-main);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

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

button, input, textarea {
    font-family: inherit;
    color: inherit;
}

li {
    list-style: none;
}

/* --- Interactive Particle Canvas Backdrop --- */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: var(--z-particles);
    pointer-events: none;
    opacity: 0.6;
}

/* --- Layout Wrappers --- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
    position: relative;
    z-index: var(--z-content);
}

/* --- Navigation Header bar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    background-color: var(--bg-surface-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-navbar);
    transition: background-color var(--transition-normal), height var(--transition-fast), border-color var(--transition-normal);
}

.navbar.scrolled {
    height: 70px;
    box-shadow: var(--card-shadow);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    height: 100%;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    letter-spacing: -0.5px;
}

.logo-bracket {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.logo-dot {
    color: var(--color-secondary);
}

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

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-fast);
    border-radius: 2px;
}

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

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

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

/* Theme Toggle styles */
.theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-primary);
    background-color: var(--bg-surface);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.theme-btn:hover {
    border-color: var(--color-secondary);
    transform: scale(1.05);
}

.theme-btn svg {
    width: 20px;
    height: 20px;
    transition: transform 0.5s ease;
}

[data-theme="dark"] .sun-icon {
    display: block;
}
[data-theme="dark"] .moon-icon {
    display: none;
}
[data-theme="light"] .sun-icon {
    display: none;
}
[data-theme="light"] .moon-icon {
    display: block;
}

/* Button UI Components */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.8rem 1.8rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #ffffff;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-shadow-purple);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: var(--glow-shadow);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.resume-btn {
    border-radius: 50px;
}

/* Mobile Navigation Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    border-radius: 2px;
}

/* --- Hero Section Styles --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    background: var(--gradient-hero);
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.badge-glow {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-secondary);
    background-color: rgba(6, 182, 212, 0.08);
    border: 1px solid var(--border-color-glow);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
    display: inline-block;
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.05);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -2px;
}

.highlight {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.typewriter-container {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.typewriter-container .prefix {
    color: var(--text-muted);
}

.typewriter-text {
    color: var(--color-secondary);
}

.cursor {
    color: var(--color-secondary);
    animation: blink 0.8s infinite;
}

.hero-tagline {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.hero-socials {
    display: flex;
    gap: 1rem;
}

.social-icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-muted);
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.social-icon-btn svg {
    width: 18px;
    height: 18px;
}

.social-icon-btn:hover {
    color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: var(--glow-shadow);
}

/* Hero Portrait Shell & Floating Elements */
.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.photo-glow-border {
    position: relative;
    border-radius: 50%;
    padding: 8px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.4) 0%, rgba(6, 182, 212, 0.4) 100%);
    box-shadow: var(--glow-shadow-purple);
    width: 320px;
    height: 320px;
    transition: transform var(--transition-normal);
}

.photo-glow-border::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    background: var(--gradient-accent);
    z-index: -1;
    opacity: 0.5;
    filter: blur(12px);
}

.portrait-container {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--bg-surface);
    position: relative;
    border: 4px solid var(--bg-main);
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.portrait-container:hover .profile-img {
    transform: scale(1.08);
}

/* Floating photo hints */
.photo-upload-hint {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(14, 22, 38, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    color: #ffffff;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
    font-size: 0.85rem;
    text-align: center;
    padding: 1.5rem;
}

/* If it is an inline SVG data placeholder, let hint show slightly */
.profile-img.placeholder-glow ~ .photo-upload-hint {
    opacity: 0.8;
}

.portrait-container:hover .photo-upload-hint {
    opacity: 0.95;
}

/* Dynamic floating tech icons */
.tech-float {
    position: absolute;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background-color: var(--bg-surface-glass);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    color: var(--text-primary);
    box-shadow: var(--card-shadow);
    z-index: 5;
    animation: floating 6s ease-in-out infinite;
    backdrop-filter: blur(8px);
}

.tech-float svg {
    width: 100%;
    height: 100%;
}

.tech-html { top: 10%; left: -5%; animation-delay: 0s; color: #f97316; }
.tech-css { bottom: 15%; left: -10%; animation-delay: 1.5s; }
.tech-js { top: -5%; right: 10%; animation-delay: 3s; color: #eab308; }
.tech-python { bottom: 10%; right: -5%; animation-delay: 4.5s; color: #3b82f6; }

/* Mouse Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-muted);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--color-secondary);
    border-radius: 2px;
    animation: scroll-wheel 1.6s ease infinite;
}

.arrow {
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
    animation: scroll-arrow 1.6s ease infinite;
}

/* --- Section Headings --- */
.section-header {
    margin-bottom: 5rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-secondary);
    text-transform: lowercase;
    margin-bottom: 0.5rem;
    display: block;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.title-underline {
    width: 60px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
    margin-top: 1rem;
}

/* --- About Me Styles (Code Editor Terminal) --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

/* Terminal Styling */
.terminal-card {
    background-color: #0b0f19;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    height: 100%;
}

.terminal-header {
    background-color: #121824;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.terminal-dot.red { background-color: #ef4444; }
.terminal-dot.yellow { background-color: #f59e0b; }
.terminal-dot.green { background-color: #10b981; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: #64748b;
    margin-left: 0.5rem;
}

.terminal-body {
    padding: 1.75rem 2rem;
    font-size: 0.85rem;
    color: #e2e8f0;
    line-height: 1.7;
    overflow-x: auto;
}

.line-num {
    display: inline-block;
    width: 24px;
    color: #475569;
    user-select: none;
}

.line-break {
    display: block;
    content: '';
    margin-bottom: 0.15rem;
}

/* Python Syntax Highlighting colors */
.token.keyword { color: #f43f5e; font-weight: bold; }
.token.class-name { color: #38bdf8; }
.token.string { color: #34d399; }
.token.function { color: #fbbf24; }
.token.self { color: #fb7185; }

/* About Info styling */
.about-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.summary-lead {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 1.25rem;
}

.summary-text {
    color: var(--text-muted);
    font-size: 0.98rem;
    margin-bottom: 1rem;
}

.bio-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.bio-item {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.bio-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted-dark);
    font-weight: 600;
}

.bio-val {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --- Skills Section Styles --- */
.skills-tabs-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.skills-tab {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.skills-tab:hover {
    border-color: var(--color-secondary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.skills-tab.active {
    background: var(--gradient-accent);
    color: #ffffff;
    border-color: transparent;
    box-shadow: var(--glow-shadow-purple);
}

.skills-panels {
    position: relative;
    min-height: 250px;
}

.skills-panel {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: translateY(15px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.skills-panel.active {
    display: block;
    position: relative;
    opacity: 1;
    transform: translateY(0);
}

/* Skill Progress Bars Grid */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem 4rem;
}

.skill-card {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-name {
    font-size: 1.05rem;
    font-weight: 600;
}

.skill-percentage {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-secondary);
    font-weight: 700;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-card);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
}

.skill-progress {
    height: 100%;
    border-radius: 10px;
    background: var(--gradient-accent);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
    transition: width 1.2s cubic-bezier(0.1, 0.8, 0.3, 1);
}

/* Skill Badges layout (for tools panel) */
.skills-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    padding-top: 1.5rem;
}

.skill-badge {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1.6rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.skill-badge:hover {
    border-color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: var(--glow-shadow);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-secondary);
    box-shadow: 0 0 8px var(--color-secondary);
}

/* --- Featured Projects Section Styles --- */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.6rem 1.4rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.filter-btn:hover {
    border-color: var(--color-secondary);
    color: var(--text-primary);
}

.filter-btn.active {
    background-color: var(--text-primary);
    color: var(--bg-main);
    border-color: var(--text-primary);
}

/* Project Cards Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-color-glow);
    box-shadow: var(--glow-shadow);
}

.project-card:hover::after {
    transform: scaleX(1);
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-title {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.3;
}

.project-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.project-features {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.02);
    border-radius: var(--border-radius-sm);
    padding: 0.8rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .project-features {
    background-color: rgba(0, 0, 0, 0.02);
    border-color: rgba(0, 0, 0, 0.01);
}

.project-features span {
    font-size: 0.82rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    color: var(--text-muted);
}

/* Hide animation during filter action */
.project-card.fade-out {
    opacity: 0;
    transform: scale(0.9);
    display: none;
}

/* --- Education Timeline Styles --- */
.timeline-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 2.5rem;
}

.timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 10px;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-badge {
    position: absolute;
    left: -2.5rem;
    top: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-accent);
    border: 4px solid var(--bg-main);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #ffffff;
    box-shadow: var(--glow-shadow-purple);
    z-index: 5;
    transition: transform var(--transition-fast);
}

.timeline-item:hover .timeline-badge {
    transform: scale(1.1);
}

.timeline-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.timeline-item:hover .timeline-content {
    border-color: var(--border-color-glow);
}

.timeline-header-block {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.timeline-degree {
    font-size: 1.5rem;
    font-weight: 800;
    margin-top: 0.25rem;
}

.timeline-status {
    font-size: 0.75rem;
    font-weight: 700;
    background-color: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #10b981;
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
}

.timeline-school {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.timeline-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.semester-tracker {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    margin-bottom: 2rem;
}

.sem-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.sem-val {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-primary);
}

.subjects-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.timeline-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.subject-chip {
    font-size: 0.82rem;
    font-weight: 600;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.9rem;
    border-radius: 4px;
    cursor: help;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.subject-chip:hover {
    border-color: var(--color-secondary);
    color: var(--text-primary);
    background-color: rgba(6, 182, 212, 0.05);
}

/* Glass card utility */
.glass-card {
    background-color: var(--bg-surface-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

/* --- GitHub Integration Section --- */
.github-dashboard {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.github-user-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.user-info-side {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.git-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--glow-shadow-purple);
}

.git-logo-svg {
    width: 24px;
    height: 24px;
}

.git-name {
    font-size: 1.25rem;
    font-weight: 700;
}

.git-username {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-secondary);
    font-weight: 600;
}

/* Simulated contribution graph grid */
.git-contrib-section {
    margin-bottom: 2.5rem;
}

.contrib-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.contrib-header h4 {
    font-size: 1.05rem;
    font-weight: 700;
}

.contrib-range {
    font-size: 0.8rem;
    color: var(--text-muted-dark);
}

.contrib-graph-wrapper {
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.contrib-grid {
    display: grid;
    grid-template-columns: repeat(53, 11px);
    grid-template-rows: repeat(7, 11px);
    gap: 3px;
    width: max-content;
}

.contrib-dot {
    width: 100%;
    height: 100%;
    border-radius: 2px;
    background-color: var(--bg-card);
    transition: transform var(--transition-fast);
}

.contrib-dot:hover {
    transform: scale(1.3);
}

/* Contribution color levels */
.level-0 { background-color: var(--bg-card); border: 1px solid var(--border-color); }
.level-1 { background-color: #0e4429; }
.level-2 { background-color: #006d32; }
.level-3 { background-color: #26a641; }
.level-4 { background-color: #39d353; }

[data-theme="light"] .level-1 { background-color: #9be9a8; }
[data-theme="light"] .level-2 { background-color: #40c463; }
[data-theme="light"] .level-3 { background-color: #30a14e; }
[data-theme="light"] .level-4 { background-color: #216e39; }

.contrib-legend {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.8rem;
}

.legend-color {
    width: 11px;
    height: 11px;
    border-radius: 2px;
}

/* Repository stats and listings row */
.git-details-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
}

.git-stats-card h4, .git-repos-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.git-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.git-stat-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.2rem;
    border-radius: var(--border-radius-sm);
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.stat-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Language distribution bar chart */
.lang-doughnut-sim h5 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.bar-lang-tracker {
    width: 100%;
    height: 10px;
    background-color: var(--bg-card);
    border-radius: 5px;
    overflow: hidden;
    display: flex;
}

.lang-segment {
    height: 100%;
    cursor: help;
}

.segment-html { background-color: #e34c26; }
.segment-css { background-color: #563d7c; }
.segment-js { background-color: #f1e05a; }
.segment-php { background-color: #4f5d95; }
.segment-py { background-color: #3572a5; }

.bar-lang-labels {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.bar-lang-labels span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.dot-col {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.d-html { background-color: #e34c26; }
.d-css { background-color: #563d7c; }
.d-js { background-color: #f1e05a; }
.d-php { background-color: #4f5d95; }
.d-py { background-color: #3572a5; }

/* Repos showcases */
.git-repo-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    transition: border-color var(--transition-fast);
}

.git-repo-item:last-child {
    margin-bottom: 0;
}

.git-repo-item:hover {
    border-color: var(--color-secondary);
}

.repo-meta-top {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.repo-git-icon {
    font-size: 1.05rem;
}

.repo-item-link {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.repo-item-link:hover {
    color: var(--color-secondary);
}

.repo-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.5rem;
    border-radius: 50px;
    color: var(--text-muted-dark);
}

.repo-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
}

.repo-footer {
    display: flex;
    gap: 1.2rem;
    font-size: 0.78rem;
    color: var(--text-muted-dark);
    margin-top: 0.25rem;
}

.repo-footer span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

/* --- Contact Section Styles --- */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 4rem;
}

.contact-info-panel h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.contact-panel-desc {
    font-size: 0.98rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.contact-item-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 1.2rem;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    gap: 1.2rem;
    transition: transform var(--transition-fast);
}

.contact-item-card:hover {
    transform: translateX(4px);
}

.contact-icon-shell {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: rgba(6, 182, 212, 0.08);
    color: var(--color-secondary);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid var(--border-color-glow);
}

.contact-lbl {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.contact-detail {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.contact-detail:hover {
    color: var(--color-secondary);
}

/* 3D Social grids styling */
.social-grid-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text-primary);
}

.social-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.social-grid-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.social-grid-item svg {
    width: 18px;
    height: 18px;
}

/* Brand glows */
.git-brand:hover { border-color: #6e5494; color: #f8fafc; box-shadow: 0 0 15px rgba(110, 84, 148, 0.25); transform: translateY(-2px); }
.link-brand:hover { border-color: #0077b5; color: #0077b5; box-shadow: 0 0 15px rgba(0, 119, 181, 0.25); transform: translateY(-2px); }
.insta-brand:hover { border-color: #e1306c; color: #e1306c; box-shadow: 0 0 15px rgba(225, 48, 108, 0.25); transform: translateY(-2px); }
.fb-brand:hover { border-color: #1877f2; color: #1877f2; box-shadow: 0 0 15px rgba(24, 119, 242, 0.25); transform: translateY(-2px); }

/* Premium Contact Form with floating label placeholders */
.contact-form-wrapper {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 3rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2.2rem;
}

.form-group {
    position: relative;
    width: 100%;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.75rem 0;
    background: none;
    border: none;
    border-bottom: 2px solid var(--border-color);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.form-group textarea {
    resize: none;
}

.form-label {
    position: absolute;
    top: 0.75rem;
    left: 0;
    font-size: 0.95rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: transform var(--transition-fast), font-size var(--transition-fast), color var(--transition-fast);
    transform-origin: left top;
}

/* Floating labels magic rule */
.form-group input:focus ~ .form-label,
.form-group input:not(:placeholder-shown) ~ .form-label,
.form-group textarea:focus ~ .form-label,
.form-group textarea:not(:placeholder-shown) ~ .form-label {
    transform: translateY(-1.5rem) scale(0.85);
    color: var(--color-secondary);
    font-weight: 600;
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width var(--transition-normal);
}

.form-group input:focus ~ .form-line,
.form-group textarea:focus ~ .form-line {
    width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
    border-bottom-color: transparent;
}

.submit-btn {
    border: none;
    align-self: flex-start;
    padding: 0.9rem 2.2rem;
}

.send-plane-icon {
    transition: transform var(--transition-fast);
}

.submit-btn:hover .send-plane-icon {
    transform: translate(3px, -2px) scale(1.05);
}

/* --- Footer Styles --- */
.footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 0 0;
    position: relative;
    z-index: var(--z-content);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 1fr;
    gap: 4rem;
    padding-bottom: 4rem;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    align-items: flex-start;
}

.footer-logo {
    font-size: 1.6rem;
    font-weight: 800;
}

.footer-objective {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 320px;
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-nav h4, .footer-socials h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.footer-nav a {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.footer-nav a:hover {
    color: var(--color-secondary);
}

.footer-social-row {
    display: flex;
    gap: 0.8rem;
}

.footer-social-row a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: transform var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.footer-social-row a:hover {
    transform: translateY(-2px);
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 1.8rem 0;
    background-color: var(--bg-main);
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted-dark);
}

.scroll-top-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.scroll-top-btn:hover {
    color: var(--color-primary);
}

.scroll-top-btn svg {
    transition: transform var(--transition-fast);
}

.scroll-top-btn:hover svg {
    transform: translateY(-2px);
}

/* --- Toast Success Banner UI --- */
.toast-banner {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: #10b981;
    color: #ffffff;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 600;
    z-index: 2000;
    transform: translateY(100px) scale(0.9);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    pointer-events: none;
}

.toast-banner.active {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.toast-icon {
    font-size: 1.15rem;
}

/* --- Entrance & Scroll Animations (JS Intercepted) --- */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Base keyframes animations */
@keyframes blink {
    50% { opacity: 0; }
}

@keyframes scroll-wheel {
    0% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(8px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@keyframes scroll-arrow {
    0% { transform: rotate(45deg) translate(0, 0); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: rotate(45deg) translate(4px, 4px); opacity: 0; }
}

@keyframes floating {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(3deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

/* Static keyframe triggers for intro */
.animate-fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards 0.3s;
}

.animate-slide-up {
    opacity: 0;
    transform: translateY(20px);
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.2s;
}

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

/* --- Media Queries (Mobile First & Breaks) --- */
@media (max-width: 1024px) {
    section {
        padding: 5rem 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 3.5rem;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-title {
        font-size: 3.25rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .git-details-row {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    /* Mobile navigation overlay drawer */
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--bg-surface);
        border-top: 1px solid var(--border-color);
        flex-direction: column;
        align-items: center;
        padding-top: 4rem;
        gap: 2rem;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .hamburger {
        display: flex;
    }
    
    /* Hamburger active morph state */
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-actions {
        gap: 1rem;
    }
    
    .resume-btn {
        display: none; /* Hide resume download in mobile header to save space, standard in bio */
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .timeline-container {
        padding-left: 1.5rem;
    }
    
    .timeline-badge {
        left: -1.5rem;
        width: 34px;
        height: 34px;
    }
    
    .timeline-content {
        padding: 1.8rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        text-align: center;
    }
    
    .footer-left {
        align-items: center;
    }
    
    .footer-social-row {
        justify-content: center;
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 1.25rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .typewriter-container {
        font-size: 1.35rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
    }
}