/* ==========================================
   CSS Design System & Stylesheet for Portfolio
   ========================================== */

/* Design Tokens & Variables */
:root {
    --bg-primary: #0a0d16;
    --bg-navbar: rgba(10, 13, 22, 0.7);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --primary-gradient: linear-gradient(135deg, #8a2be2 0%, #00ffff 50%, #da70d6 100%);
    --accent-indigo: #8a2be2;
    --accent-cyan: #00ffff;
    --accent-pink: #da70d6;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.07);
    --card-glow: rgba(0, 255, 255, 0.1);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: #1f2937;
    border-radius: 5px;
    border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-indigo);
}

/* Typography & Accent Text */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Background Glow Effects */
.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.glow-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    mix-blend-mode: screen;
}

.circle-1 {
    width: 50vw;
    height: 50vw;
    background: var(--accent-indigo);
    top: -10%;
    right: -10%;
    animation: floatGlow 15s infinite ease-in-out alternate;
}

.circle-2 {
    width: 45vw;
    height: 45vw;
    background: var(--accent-cyan);
    bottom: -10%;
    left: -10%;
    animation: floatGlow 20s infinite ease-in-out alternate-reverse;
}

.circle-3 {
    width: 35vw;
    height: 35vw;
    background: var(--accent-pink);
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: floatGlow 18s infinite ease-in-out;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 8%) scale(1.1); }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--bg-navbar);
    border-bottom: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.2rem;
}

.logo-accent {
    color: var(--accent-cyan);
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    position: relative;
    padding: 0.25rem 0;
    transition: var(--transition-smooth);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
    border-radius: 2px;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 80%;
}

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

.menu-toggle .bar {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

/* Glassmorphism Card Utility */
.card-glass {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    padding: 2.5rem;
    transition: var(--transition-smooth);
}

.card-glass:hover {
    border-color: rgba(0, 255, 255, 0.2);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.05);
    transform: translateY(-4px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--primary-gradient);
    color: #0d1117;
    border: none;
    box-shadow: 0 4px 15px rgba(138, 43, 226, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 255, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    text-align: center;
}

/* Layout Containers */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 800;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    background: rgba(138, 43, 226, 0.15);
    border: 1px solid rgba(138, 43, 226, 0.3);
    color: var(--accent-cyan);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-title span {
    display: block;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.avatar-glow-wrapper {
    position: relative;
}

.svg-avatar {
    filter: drop-shadow(0 0 15px rgba(138, 43, 226, 0.2));
    animation: floatAvatar 6s infinite ease-in-out alternate;
}

@keyframes floatAvatar {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

.pulse-ring {
    transform-origin: center;
    animation: strokePulse 3s infinite ease-in-out alternate;
}

@keyframes strokePulse {
    0% { stroke-dasharray: 400 100; stroke-dashoffset: 0; }
    100% { stroke-dasharray: 100 400; stroke-dashoffset: 250; }
}

/* About Me Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.card-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}

.vision-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.vision-list li {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
}

.vision-icon {
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.6rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.vision-list strong {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.25rem;
}

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

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.skill-icon {
    font-size: 2rem;
}

.skill-category {
    font-size: 1.35rem;
    font-weight: 700;
}

.skill-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.skill-bar-outer {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.skill-bar-inner {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 3px;
    transform-origin: left;
    transition: transform 1s ease-in-out;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

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

.project-image-placeholder {
    height: 200px;
    background: linear-gradient(135deg, rgba(138, 43, 226, 0.15) 0%, rgba(0, 255, 255, 0.05) 100%);
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.project-image-placeholder::before {
    content: '';
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(0,255,255,0.1) 0%, transparent 70%);
    animation: rotateBg 20s linear infinite;
}

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

.project-svg-icon {
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 0 8px rgba(0,255,255,0.3));
    transition: var(--transition-smooth);
}

.project-card:hover .project-svg-icon {
    transform: scale(1.1);
}

.project-info {
    padding: 2rem;
}

.project-tag {
    font-size: 0.75rem;
    color: var(--accent-cyan);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

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

.project-tech span {
    font-size: 0.8rem;
    background: rgba(255, 255, 255, 0.04);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
}

.contact-intro {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 2.5rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.contact-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.2rem;
}

.contact-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
}

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

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

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

.form-group input, .form-group textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1.2rem;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: var(--transition-smooth);
}

.form-group label {
    position: absolute;
    left: 1.2rem;
    top: 1.2rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    pointer-events: none;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.1);
}

/* Floating label logic */
.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.6rem;
    left: 0.8rem;
    font-size: 0.75rem;
    padding: 0 0.4rem;
    background: var(--bg-primary);
    color: var(--accent-cyan);
    border-radius: 4px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--card-border);
    padding: 3rem 2rem;
    text-align: center;
    background: rgba(5, 7, 13, 0.6);
}

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

/* Responsive Web Design Media Queries */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-visual {
        order: -1;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-actions {
        justify-content: center;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 4.8rem;
        left: -100%;
        width: 100%;
        height: calc(100vh - 4.8rem);
        background: var(--bg-primary);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        transition: var(--transition-smooth);
        border-top: 1px solid var(--card-border);
    }

    .nav-menu.active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    /* Menu toggle animation to X */
    .menu-toggle.open .bar:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    .menu-toggle.open .bar:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.open .bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .section-title {
        font-size: 2rem;
    }
}