/* Google Fonts: Outfit (headings) and Inter (body text) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

:root {
    /* Font Families */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Theme: Light (Default) */
    --bg-primary: hsl(210, 20%, 98%);
    --bg-secondary: hsl(0, 0%, 100%);
    --bg-tertiary: hsl(210, 20%, 94%);
    
    --text-primary: hsl(222, 47%, 11%);
    --text-secondary: hsl(215, 16%, 47%);
    --text-tertiary: hsl(215, 16%, 60%);
    
    --accent-color: hsl(221, 83%, 53%);
    --accent-hover: hsl(221, 83%, 45%);
    --accent-gradient: linear-gradient(135deg, hsl(221, 83%, 53%) 0%, hsl(200, 95%, 48%) 100%);
    --accent-light: hsla(221, 83%, 53%, 0.1);
    
    --card-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.02);
    --border-color: hsl(214, 32%, 91%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-blur: blur(12px);
    
    --timeline-line: hsl(214, 32%, 85%);
    --badge-bg: hsl(214, 32%, 91%);
    --badge-text: hsl(222, 47%, 20%);
}

/* Theme: Dark Mode Override */
[data-theme="dark"] {
    --bg-primary: hsl(222, 47%, 10%);
    --bg-secondary: hsl(223, 47%, 14%);
    --bg-tertiary: hsl(224, 47%, 18%);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 75%);
    --text-tertiary: hsl(215, 15%, 55%);
    
    --accent-color: hsl(190, 90%, 50%);
    --accent-hover: hsl(190, 90%, 43%);
    --accent-gradient: linear-gradient(135deg, hsl(190, 90%, 50%) 0%, hsl(221, 83%, 53%) 100%);
    --accent-light: hsla(190, 90%, 50%, 0.15);
    
    --card-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
    --border-color: hsl(223, 30%, 22%);
    --glass-bg: rgba(24, 33, 47, 0.65);
    --glass-border: rgba(255, 255, 255, 0.06);
    
    --timeline-line: hsl(223, 30%, 25%);
    --badge-bg: hsl(223, 30%, 22%);
    --badge-text: hsl(190, 90%, 60%);
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.8rem;
    position: relative;
    margin-bottom: 2rem;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 40px;
    height: 4px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

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

/* Layout Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Grid Layout */
.profile-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

@media (min-width: 992px) {
    .profile-grid {
        grid-template-columns: 350px 1fr;
    }
}

/* Glassmorphism Card Style */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
}

/* Navigation & Header Controls */
.top-bar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.theme-toggle-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
    background: var(--border-color);
}

/* Left Column: Profile Card */
.profile-card {
    position: sticky;
    top: 2rem;
    text-align: center;
}

.avatar-wrapper {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    padding: 5px;
    background: var(--accent-gradient);
    box-shadow: var(--card-shadow);
}

.avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--bg-secondary);
}

.profile-name {
    font-size: 1.8rem;
    margin-bottom: 0.25rem;
}

.profile-title {
    font-size: 1rem;
    color: var(--accent-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.profile-details {
    text-align: left;
    margin-bottom: 1.5rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.detail-item i {
    color: var(--accent-color);
    width: 20px;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 12px;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-btn:hover {
    transform: translateY(-3px);
    background: var(--accent-color);
    color: var(--bg-secondary);
    border-color: var(--accent-color);
    box-shadow: 0 5px 15px var(--accent-light);
}

/* Right Column Content */
.section-card {
    animation: fadeInUp 0.6s ease both;
}

/* Timeline Components */
.timeline {
    position: relative;
    padding-left: 1.5rem;
    border-left: 2px solid var(--timeline-line);
    margin-top: 1rem;
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
}

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

.timeline-dot {
    position: absolute;
    left: calc(-1.5rem - 6px);
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-color);
    border: 2px solid var(--bg-secondary);
    box-shadow: 0 0 0 4px var(--accent-light);
}

.timeline-header {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.5rem;
}

@media (min-width: 576px) {
    .timeline-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: baseline;
    }
}

.timeline-title {
    font-size: 1.15rem;
    font-weight: 600;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-color);
    background: var(--accent-light);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    margin-top: 0.25rem;
}

.timeline-subtitle {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.95rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

@media (min-width: 576px) {
    .skills-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.skill-card {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.skill-progress-bg {
    background: var(--border-color);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress-bar {
    background: var(--accent-gradient);
    height: 100%;
    border-radius: 4px;
    width: 0; /* Dynamic loading in JS or standard CSS width transition */
    transition: width 1.5s cubic-bezier(0.1, 0.8, 0.2, 1);
}

/* Languages */
.lang-list {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.lang-badge {
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* GitHub Repos Section */
.repos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

@media (min-width: 768px) {
    .repos-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.repo-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 170px;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.repo-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 20px -10px var(--accent-light);
}

.repo-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.repo-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.repo-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.repo-lang {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.lang-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-color);
}

.repo-stats {
    display: flex;
    gap: 0.75rem;
}

.repo-stat-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Call to Action Section (GitHub Header) */
.cta-header {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (min-width: 576px) {
    .cta-header {
        flex-direction: row;
        align-items: center;
    }
}

.cta-btn {
    background: var(--accent-gradient);
    color: var(--bg-secondary) !important;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 15px var(--accent-light);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-light);
}

/* Loading & Error States */
.loading-indicator, .error-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.loading-indicator i {
    animation: spin 1s linear infinite;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
    color: var(--accent-color);
}

.error-message i {
    font-size: 1.5rem;
    color: hsl(0, 80%, 50%);
    margin-bottom: 0.5rem;
    display: block;
}

/* Footer styling */
footer {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

footer cite {
    font-style: italic;
    display: block;
    margin-top: 0.5rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}