/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
    /* Color Palette (HSL Tailored) */
    --bg-base: hsl(222, 47%, 7%);
    --bg-surface: hsla(222, 47%, 11%, 0.7);
    --bg-surface-solid: hsl(222, 47%, 11%);
    --bg-surface-hover: hsla(222, 47%, 16%, 0.8);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 65%);
    --text-muted: hsl(215, 16%, 47%);
    
    --color-accent: hsl(198, 93%, 60%); /* Ice Blue */
    --color-accent-purple: hsl(263, 90%, 65%); /* Electric Purple */
    --color-accent-glow: hsla(198, 93%, 60%, 0.15);
    
    --border-color: hsla(217, 32%, 18%, 0.85);
    --border-hover: hsla(198, 93%, 60%, 0.3);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Animation & Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout Constants */
    --max-width: 1200px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

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

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

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* ==========================================================================
   BACKGROUND GLOW DECORATIONS
   ========================================================================== */
.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.35;
    animation: pulse 12s infinite alternate ease-in-out;
}

.glow-sphere-1 {
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 80%);
}

.glow-sphere-2 {
    bottom: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-purple) 0%, transparent 80%);
    animation-delay: -6s;
}

@keyframes pulse {
    0% {
        transform: translate(0, 0) scale(1);
    }
    100% {
        transform: translate(80px, 50px) scale(1.15);
    }
}

/* ==========================================================================
   REUSABLE UI COMPONENTS (Buttons, Badge, Gradients)
   ========================================================================== */
.text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 6px 14px;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    backdrop-filter: blur(8px);
    margin-bottom: 24px;
    animation: fadeInDown 0.8s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: hsl(142, 70%, 50%); /* bright green */
    box-shadow: 0 0 8px hsl(142, 70%, 50%);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0% { transform: scale(0.95); opacity: 0.5; }
    50% { transform: scale(1.15); opacity: 1; }
    100% { transform: scale(0.95); opacity: 0.5; }
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-purple) 100%);
    color: hsl(222, 47%, 7%);
    border: none;
    box-shadow: 0 4px 20px rgba(100, 200, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(100, 200, 255, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: hsla(222, 47%, 7%, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: var(--transition-fast);
}

.site-header.scrolled {
    height: 70px;
    background-color: hsla(222, 47%, 7%, 0.85);
}

.header-container {
    max-width: var(--max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--color-accent);
}

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

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

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

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 140px 24px 80px 24px;
    position: relative;
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

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

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 540px;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s forwards;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

/* Glassmorphic Code Card Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.interactive-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(12px);
    transform-style: preserve-3d;
    transition: transform 0.1s ease-out;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
}

.window-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.window-dot.red { background-color: #ff5f56; }
.window-dot.yellow { background-color: #ffbd2e; }
.window-dot.green { background-color: #27c93f; }

.window-title {
    margin-left: auto;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.card-body {
    padding: 24px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.code-keyword { color: #f472b6; }
.code-variable { color: #60a5fa; }
.code-string { color: #34d399; }
.code-number { color: #fbbf24; }

/* ==========================================================================
   SECTIONS: COMMON HEADER
   ========================================================================== */
section {
    padding: 100px 24px;
}

.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 60px;
}

.section-tagline {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-purple) 100%);
    border-radius: 2px;
    margin-top: 16px;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.stats-row {
    display: flex;
    gap: 24px;
    margin-top: 36px;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 24px;
    flex: 1;
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.skills-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 24px;
    position: relative;
    padding-left: 12px;
}

.skills-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 18px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.skill-pill {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-fast);
}

.skill-pill i {
    width: 16px;
    height: 16px;
    color: var(--color-accent);
}

.skill-pill:hover {
    border-color: var(--border-hover);
    background-color: var(--bg-surface-hover);
    transform: translateY(-2px);
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 32px;
}

.project-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.project-img-wrapper {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.project-gradient-placeholder {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-smooth);
}

.p-gradient-1 {
    background: linear-gradient(135deg, hsl(200, 80%, 20%) 0%, hsl(260, 80%, 20%) 100%);
}
.p-gradient-2 {
    background: linear-gradient(135deg, hsl(320, 80%, 20%) 0%, hsl(230, 80%, 20%) 100%);
}
.p-gradient-3 {
    background: linear-gradient(135deg, hsl(150, 80%, 20%) 0%, hsl(210, 80%, 20%) 100%);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(7, 11, 22, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    transition: var(--transition-fast);
    backdrop-filter: blur(4px);
}

.project-link {
    width: 44px;
    height: 44px;
    background-color: var(--text-primary);
    color: var(--bg-base);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateY(15px);
    transition: var(--transition-smooth);
}

.project-link:hover {
    transform: scale(1.1);
    background-color: var(--color-accent);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.project-card:hover .project-gradient-placeholder {
    transform: scale(1.05);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-card:hover .project-link {
    transform: translateY(0);
}

.project-info {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.project-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tech span {
    font-size: 0.75rem;
    font-weight: 500;
    background-color: hsla(217, 32%, 18%, 0.4);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 4px;
    color: var(--text-muted);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.contact-details {
    display: flex;
    flex-direction: column;
}

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

.contact-value {
    font-weight: 500;
}

.contact-value:hover {
    color: var(--color-accent);
}

/* Form Styles */
.contact-form {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    backdrop-filter: blur(8px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background-color: hsla(222, 47%, 7%, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 10px var(--color-accent-glow);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 48px 24px;
    background-color: hsla(222, 47%, 5%, 0.8);
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    text-align: center;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 16px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.social-icon:hover {
    color: var(--text-primary);
    border-color: var(--color-accent);
    background-color: var(--bg-surface-hover);
    transform: translateY(-2px);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN (Media Queries)
   ========================================================================== */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-base);
        border-top: 1px solid var(--border-color);
        padding: 40px 24px;
        flex-direction: column;
        align-items: flex-start;
        transform: translateX(-100%);
        transition: transform var(--transition-smooth);
        z-index: 99;
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 24px;
    }

    .nav-link {
        font-size: 1.25rem;
        display: block;
        width: 100%;
    }

    .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-row {
        flex-wrap: wrap;
    }
}