/* --- CSS Custom Variables (Premium Glossy Dark Mode Default) --- */
:root {
    --bg-primary: radial-gradient(circle at 50% 50%, #131c2e 0%, #080d1a 100%);
    --bg-secondary: rgba(20, 30, 54, 0.6);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8; 
    --accent-hover: #0ea5e9;
    --card-bg: rgba(22, 34, 57, 0.45);
    --border-color: rgba(255, 255, 255, 0.07);
    --navbar-bg: rgba(8, 13, 26, 0.75);
    --blur-effect: blur(16px);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme="light"] {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #2563eb; 
    --accent-hover: #1d4ed8;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --navbar-bg: rgba(241, 255, 249, 0.85);
    --blur-effect: blur(10px);
    --glass-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.07);
}

/* --- Base Structural Setup --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
    font-family: 'Plus Jakarta Sans', sans-serif;
}
body {
    background: var(--bg-primary);
    background-attachment: fixed;
    color: var(--text-primary);
    transition: var(--transition);
    line-height: 1.6;
    font-size: 1rem;
    overflow-x: hidden;
}

/* --- Layout Architecture --- */
.section-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 100px 24px;
}
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 3.5rem;
    text-align: center;
}
.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background-color: var(--accent);
    margin: 12px auto 0;
    border-radius: 4px;
}
.highlight {
    color: var(--accent);
    display: inline-block;
}

/* --- Interactive Action Elements --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 2.2rem;
    font-weight: 600;
    font-size: 1rem;
    border-radius: 10px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.primary-btn {
    background-color: var(--accent);
    color: #ffffff;
}
.primary-btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.3);
}
.secondary-btn {
    background-color: rgba(255,255,255,0.02);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    margin-left: 1rem;
}
.secondary-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* --- Fixed Desktop Top Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: var(--blur-effect);
    -webkit-backdrop-filter: var(--blur-effect);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 24px;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-decoration: none;
}
.logo span { color: var(--accent); }
.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.6rem 1.2rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}
.theme-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.6rem;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.theme-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.desktop-only-icon { display: none; }

/* --- Unique App-Style Mobile Navigation Dock --- */
.mobile-bottom-dock {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 48px);
    max-width: 400px;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 10px 16px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: space-between;
    align-items: center;
}
[data-theme="light"] .mobile-bottom-dock {
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}
.dock-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    gap: 4px;
    padding: 6px 12px;
    border-radius: 12px;
    transition: var(--transition);
}
.dock-item i {
    font-size: 1.2rem;
}
.dock-item:hover, .dock-item.active {
    color: var(--accent);
    background: rgba(54, 189, 248, 0.1);
}

/* --- Hero Section Execution --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 60px;
}
.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
    line-height: 1.1;
}
.hero-content h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1.8rem;
    color: var(--text-secondary);
}
.hero-content p {
    font-size: 1.2rem;
    max-width: 650px;
    margin: 0 auto 3rem;
    color: var(--text-secondary);
}
.cursor {
    display: inline-block;
    background-color: var(--text-primary);
    animation: blink 0.7s infinite;
    width: 3px;
}
@keyframes blink { 0%, 100% { opacity: 0; } 50% { opacity: 1; } }

/* --- Optimized About Section --- */
.about-section {
    background: transparent;
    position: relative;
    padding: 60px 0;
}
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 70px;
    align-items: center;
}
.about-left {
    display: flex;
    flex-direction: column;
}
.section-tag {
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    margin-bottom: 0.5rem;
}
.section-title-left {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
    color: var(--text-primary);
}
.about-text-lead {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}
.about-text-body {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
}
.about-right {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.metric-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    backdrop-filter: var(--blur-effect);
    -webkit-backdrop-filter: var(--blur-effect);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: flex-start;
    gap: 28px; /* Increased separation padding between elements */
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    transition: var(--transition);
}
[data-theme="light"] .metric-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(248, 250, 252, 0.8) 100%);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}
.metric-card:hover {
    transform: translateY(-4px) scale(1.01);
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.35);
}

/* FIX: Clear minimum bounds separation container preventing overlap */
.metric-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    min-width: 90px; /* Safe expanded bounds prevents proximity tracking collision */
    flex-shrink: 0;   /* Restricts compression during tight viewport updates */
}
.metric-num i {
    font-size: 2rem;
    margin-top: 4px;
}
.metric-detail h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
}
.metric-detail p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

/* --- Component Baselines --- */
.stat-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur-effect);
    -webkit-backdrop-filter: var(--blur-effect);
    padding: 28px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    box-shadow: var(--glass-shadow);
}
.stat-card h3 { font-size: 2.2rem; font-weight: 800; color: var(--accent); }

.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.skill-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur-effect);
    -webkit-backdrop-filter: var(--blur-effect);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}
.skill-card:hover { transform: translateY(-5px); border-color: var(--accent); }
.skill-icon { font-size: 2.5rem; color: var(--accent); margin-bottom: 1rem; }

.contact-subtitle { text-align: center; color: var(--text-secondary); margin: -2rem 0 4rem; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 30px; }
.info-item { display: flex; align-items: center; gap: 20px; }
.info-item i {
    font-size: 1.4rem; color: var(--accent); background: var(--card-bg);
    border: 1px solid var(--border-color); width: 54px; height: 54px;
    display: flex; align-items: center; justify-content: center; border-radius: 50%;
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 1.1rem; background: var(--card-bg); border: 1px solid var(--border-color);
    color: var(--text-primary); border-radius: 10px; outline: none; font-family: inherit; font-size: 1rem;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); }
.btn-block { width: 100%; }
.footer { text-align: center; padding: 3rem 2rem 100px; border-top: 1px solid var(--border-color); color: var(--text-secondary); }

/* --- Clean and Scaled Mobile Optimization Rules --- */
@media (max-width: 768px) {
    .nav-links { display: none !important; }
    .mobile-bottom-dock { display: flex !important; }
    .nav-container { padding: 1rem 20px; }
    
    .section-container { padding: 60px 20px !important; }
    .section-title { font-size: 2rem; margin-bottom: 2.5rem; }
    .footer { padding-bottom: 120px; }

    .hero-content h1 { 
        font-size: 2.4rem; 
        line-height: 1.2;
        letter-spacing: -0.02em;
    }
    .hero-content h2 { font-size: 1.5rem; }
    .hero-content p { font-size: 1.05rem; margin-bottom: 2rem; }
    
    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 12px;
        max-width: 280px;
        margin: 0 auto;
    }
    .secondary-btn { margin-left: 0; }
    .btn { width: 100%; padding: 0.85rem 1.5rem; border-radius: 12px; }

    .about-grid, .contact-grid { 
        grid-template-columns: 1fr !important; 
        gap: 40px !important; 
    }
    .section-title-left {
        font-size: 2.2rem !important;
        text-align: center;
        margin-bottom: 1.5rem;
    }
    .about-text-lead, .about-text-body {
        text-align: center;
    }

    .metric-card {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        gap: 16px !important;
        padding: 24px !important;
    }
    .metric-num {
        min-width: auto !important;
    }
}