/* ==========================================================================
   PREMIUM IT LANDING PAGE DESIGN SYSTEM (styles.css)
   ========================================================================== */

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

:root {
    /* Color Palette */
    --bg-main: #060913;
    --bg-surface: rgba(13, 20, 38, 0.45);
    --bg-surface-hover: rgba(20, 30, 58, 0.65);
    --border-glow: rgba(0, 242, 254, 0.15);
    --border-light: rgba(255, 255, 255, 0.06);
    
    /* Accents & Gradients */
    --primary-cyan: #00f2fe;
    --primary-blue: #0070f3;
    --primary-purple: #9d4edd;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --grad-primary: linear-gradient(135deg, var(--primary-cyan) 0%, #4facfe 100%);
    --grad-text: linear-gradient(135deg, #00f2fe 10%, #4facfe 50%, #9d4edd 100%);
    --grad-glow: radial-gradient(circle at 50% 50%, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
    
    /* Typography & Layout */
    --font-sans: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-full: 9999px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* Cybernetic Background Glow Effects */
body::before {
    content: '';
    position: absolute;
    top: -10%;
    left: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(80px);
}

body::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle, rgba(157, 78, 221, 0.06) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
    filter: blur(80px);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-main);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--grad-primary);
}

/* Typography & Titles */
h1, h2, h3, h4 {
    font-weight: 700;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Reusable Grid & Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--grad-primary);
    margin: 15px auto 0;
    border-radius: var(--radius-full);
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: var(--transition-smooth);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glow);
    box-shadow: 0 12px 40px 0 rgba(0, 242, 254, 0.1);
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(6, 9, 19, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition-fast);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--primary-cyan);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 6px 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--grad-primary);
    transition: var(--transition-smooth);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.cta-nav {
    padding: 10px 20px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.cta-nav:hover {
    background: var(--grad-primary);
    border-color: transparent;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
    color: #060913;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.hero-tagline {
    background: rgba(0, 242, 254, 0.1);
    color: var(--primary-cyan);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 242, 254, 0.2);
    width: max-content;
}

.hero-tagline span {
    width: 6px;
    height: 6px;
    background: var(--primary-cyan);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--primary-cyan);
    animation: pulse 1.5s infinite alternate;
}

.hero-title {
    font-size: 3.8rem;
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.btn-primary {
    background: var(--grad-primary);
    color: #060913;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.2);
}

.btn-primary:hover {
    box-shadow: 0 4px 30px rgba(0, 242, 254, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Hero Art - Graphic Concept */
.hero-art {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.cyber-sphere {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 70%);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: rotate 20s linear infinite;
}

.cyber-sphere::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px dashed rgba(0, 242, 254, 0.3);
    animation: rotate-reverse 15s linear infinite;
}

.cyber-sphere::after {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    border: 1px solid rgba(157, 78, 221, 0.25);
}

.sphere-core {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: var(--grad-text);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 50px rgba(0, 242, 254, 0.4);
    animation: scale-up 4s ease-in-out infinite alternate;
}

.sphere-core i {
    font-size: 3rem;
    color: var(--bg-main);
}

/* About / Pillars Section */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 20px;
}

.pillar-card {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.pillar-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-cyan);
    font-size: 1.5rem;
    font-weight: 700;
}

.pillar-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.pillar-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Interactive Tech Stack */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.skill-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: var(--transition-smooth);
    text-align: center;
    gap: 12px;
}

.skill-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-purple);
    box-shadow: 0 8px 24px rgba(157, 78, 221, 0.15);
    background: rgba(20, 30, 58, 0.5);
}

.skill-icon {
    font-size: 2.2rem;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.skill-card:hover .skill-icon {
    transform: scale(1.15);
}

.skill-card span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-card:hover span {
    color: var(--text-primary);
}

/* Showcase Projects Section */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--grad-primary);
    color: #060913;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.project-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
}

.project-thumb {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-thumb svg {
    width: 80px;
    height: 80px;
    stroke: rgba(255, 255, 255, 0.15);
    transition: var(--transition-smooth);
}

.project-card:hover .project-thumb svg {
    stroke: var(--primary-cyan);
    transform: scale(1.1);
}

.project-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(6, 9, 19, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--primary-cyan);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

.project-title {
    font-size: 1.3rem;
    margin-bottom: 12px;
    transition: var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--primary-cyan);
}

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

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.project-tags span {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-weight: 500;
}

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

.project-link {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--primary-cyan);
}

/* Experience / Timeline Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 40px auto 0;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--border-light);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    margin-bottom: 30px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    right: -8px;
    background-color: var(--bg-main);
    border: 3px solid var(--primary-cyan);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
    box-shadow: 0 0 10px var(--primary-cyan);
    transition: var(--transition-fast);
}

.timeline-item-left {
    left: 0;
    text-align: right;
}

.timeline-item-right {
    left: 50%;
}

.timeline-item-right::after {
    left: -8px;
}

.timeline-date {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary-cyan);
    margin-bottom: 8px;
}

.timeline-card {
    padding: 24px;
}

.timeline-card h3 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.timeline-card h4 {
    font-size: 0.95rem;
    color: var(--primary-purple);
    font-weight: 500;
    margin-bottom: 12px;
}

.timeline-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Contact Form Section */
.contact-container {
    max-width: 680px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 14px 18px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: var(--transition-smooth);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-cyan);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
}

textarea.form-control {
    resize: vertical;
    min-height: 130px;
}

.form-alert {
    padding: 14px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    display: none;
    font-weight: 500;
}

.form-alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Footer styling */
footer {
    border-top: 1px solid var(--border-light);
    padding: 50px 0;
    background: #03050b;
    text-align: center;
    color: var(--text-muted);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-cyan);
}

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

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.social-icon:hover {
    background: var(--grad-primary);
    color: #060913;
    border-color: transparent;
    transform: translateY(-3px);
}

/* Animation Keyframes */
@keyframes pulse {
    0% {
        box-shadow: 0 0 4px var(--primary-cyan);
        opacity: 0.7;
    }
    100% {
        box-shadow: 0 0 12px var(--primary-cyan);
        opacity: 1;
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

@keyframes rotate-reverse {
    0% {
        transform: rotate(360deg);
    }
    100% {
        transform: rotate(0deg);
    }
}

@keyframes scale-up {
    0% {
        transform: scale(0.95);
        filter: brightness(0.9);
    }
    100% {
        transform: scale(1.05);
        filter: brightness(1.1);
    }
}

/* Mobile & Tablet Responsiveness */
@media screen and (max-width: 992px) {
    .navbar {
        height: 70px;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-tagline {
        margin: 0 auto 24px;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-art {
        order: -1;
    }
    
    .cyber-sphere {
        width: 250px;
        height: 250px;
    }
    
    .sphere-core {
        width: 100px;
        height: 100px;
    }
    
    .timeline::after {
        left: 31px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 20px;
        text-align: left;
    }
    
    .timeline-item-left {
        left: 0;
    }
    
    .timeline-item-left::after,
    .timeline-item-right::after {
        left: 23px;
    }
}

@media screen and (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(6, 9, 19, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 40px;
        transition: var(--transition-smooth);
        border-top: 1px solid var(--border-light);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .navbar .cta-nav {
        display: none;
    }
}