/* ==========================================================================
   CSS RESET & VARIABLE SYSTEM
   ========================================================================== */
:root {
    /* Fonts */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;

    /* Transitions */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Theme colors (Dark mode default) */
    --bg-primary: #090d16;
    --bg-secondary: #0f1524;
    --card-bg: rgba(21, 30, 52, 0.5);
    --card-border: rgba(255, 255, 255, 0.06);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #8b5cf6;
    --accent-secondary: #3b82f6;
    --accent-gradient: linear-gradient(135deg, #a855f7 0%, #3b82f6 100%);
    --accent-gradient-hover: linear-gradient(135deg, #b56eff 0%, #4f93ff 100%);
    --glow-color: rgba(139, 92, 246, 0.15);
    --shadow-primary: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --nav-bg: rgba(9, 13, 22, 0.8);
}

.light-theme {
    /* Theme colors (Light mode overrides) */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(15, 23, 42, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-primary: #6d28d9;
    --accent-secondary: #1d4ed8;
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    --accent-gradient-hover: linear-gradient(135deg, #6d28d9 0%, #1d4ed8 100%);
    --glow-color: rgba(37, 99, 235, 0.08);
    --shadow-primary: 0 8px 32px 0 rgba(148, 163, 184, 0.15);
    --nav-bg: rgba(248, 250, 252, 0.8);
}

* {
    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;
    transition: background-color 0.5s ease, color 0.5s ease;
    position: relative;
    min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ==========================================================================
   GLOWING BACKGROUND EFFECT
   ========================================================================== */
.blob-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
    transition: opacity 0.5s ease;
}
.light-theme .blob-glow {
    opacity: 0.08;
}
.blob-1 {
    top: 10%;
    left: -100px;
    background: #8b5cf6;
    animation: floatBlob 20s infinite alternate;
}
.blob-2 {
    top: 50%;
    right: -100px;
    background: #3b82f6;
    animation: floatBlob 25s infinite alternate-reverse;
}
.blob-3 {
    bottom: 10%;
    left: 20%;
    background: #ec4899;
    animation: floatBlob 18s infinite alternate;
}

@keyframes floatBlob {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, 30px) scale(1.1); }
    100% { transform: translate(-30px, -50px) scale(0.9); }
}

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

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

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-primary);
}

.card {
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: 0 12px 40px var(--glow-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.25);
}

.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(139, 92, 246, 0.4);
}

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

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

.btn-block {
    display: flex;
    width: 100%;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    transition: background-color 0.5s ease, border-color 0.5s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

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

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

.nav-item {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 6px 0;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-normal);
    border-radius: var(--radius-full);
}

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

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

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

/* Theme Toggle */
.theme-toggle-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.theme-toggle-btn:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-toggle-btn .icon-moon,
.theme-toggle-btn .icon-sun {
    position: absolute;
    width: 20px;
    height: 20px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode state: show moon, hide sun */
.dark-theme .theme-toggle-btn .icon-moon {
    transform: translateY(0);
}
.dark-theme .theme-toggle-btn .icon-sun {
    transform: translateY(40px);
}

/* Light mode state: show sun, hide moon */
.light-theme .theme-toggle-btn .icon-moon {
    transform: translateY(-40px);
}
.light-theme .theme-toggle-btn .icon-sun {
    transform: translateY(0);
}

/* Hamburger */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--card-bg);
}

/* Mobile Dropdown */
.mobile-dropdown {
    display: none;
    flex-direction: column;
    padding: 16px 24px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--card-border);
    gap: 16px;
    transition: var(--transition-normal);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    padding: 160px 0 100px 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
    align-items: center;
}

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

.badge-new {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 12px #10b981;
    animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
    0% { opacity: 0.5; transform: scale(0.9); }
    100% { opacity: 1; transform: scale(1.1); }
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.typed-text {
    border-right: 2px solid var(--accent-primary);
    animation: blinkCursor 0.75s step-end infinite;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding-right: 4px;
}

@keyframes blinkCursor {
    from, to { border-color: transparent }
    50% { border-color: var(--accent-primary); }
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 40px;
}

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

/* Avatar Graphic */
.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.avatar-container {
    position: relative;
    width: 320px;
    height: 320px;
    z-index: 1;
}

.avatar-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 330px;
    height: 330px;
    background: var(--accent-gradient);
    border-radius: 50%;
    filter: blur(20px);
    opacity: 0.6;
    z-index: -1;
}

.avatar-frame {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--bg-primary);
    box-shadow: var(--shadow-primary);
    background: var(--bg-secondary);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
}

.avatar-container:hover .avatar-img {
    transform: scale(1.05);
}

/* Floating Tech Tags */
.tech-tag {
    position: absolute;
    width: 52px;
    height: 52px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    cursor: pointer;
    transition: transform 0.3s ease;
}

.tech-tag:hover {
    transform: scale(1.15) translateY(-5px);
    border-color: var(--accent-primary);
}

.tag-icon {
    width: 24px;
    height: 24px;
}

/* Float Animation offsets */
.tag-html {
    top: 10%;
    left: -10px;
    animation: floatTag 6s infinite ease-in-out;
}
.tag-css {
    bottom: 10%;
    left: -10px;
    animation: floatTag 7s infinite ease-in-out 1s;
}
.tag-js {
    top: 15%;
    right: -10px;
    animation: floatTag 5s infinite ease-in-out 2s;
}
.tag-react {
    bottom: 15%;
    right: -10px;
    animation: floatTag 8s infinite ease-in-out 0.5s;
}

@keyframes floatTag {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.text-orange { color: #f97316; }
.text-blue { color: #3b82f6; }
.text-yellow { color: #eab308; }
.text-cyan { color: #06b6d4; }

/* ==========================================================================
   SECTIONS GENERAL
   ========================================================================== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent-primary);
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.header-line {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 0 auto;
    border-radius: var(--radius-full);
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.about-info h3, .about-skills h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    font-weight: 700;
}

.about-info p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
    border-top: 1px solid var(--card-border);
    padding-top: 32px;
}

.stat-item {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.skill-groups {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.skill-category h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag-item {
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.skill-tag-item:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.project-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-md);
    overflow: hidden;
    padding: 0;
    height: 100%;
}

.project-img-wrapper {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--bg-secondary);
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(9, 13, 22, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    transition: var(--transition-normal);
}

.project-card:hover .project-img {
    transform: scale(1.08);
}

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

.project-link {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--text-primary);
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

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

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

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.p-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: var(--glow-color);
    padding: 4px 10px;
    border-radius: var(--radius-full);
}

.project-card-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-grow: 1;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
}

.contact-info h3, .contact-form-wrapper h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

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

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

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

.c-icon-box {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    transition: var(--transition-fast);
}

.contact-item:hover .c-icon-box {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
}

.c-text {
    display: flex;
    flex-direction: column;
}

.c-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.c-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-icon:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 4px 12px var(--glow-color);
}

/* Form Styling */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

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

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

.form-group input, .form-group textarea {
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
    outline: none;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--glow-color);
    background: var(--bg-primary);
}

.form-feedback {
    margin-top: 20px;
    padding: 16px;
    border-radius: var(--radius-sm);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #10b981;
}

.feedback-content {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 500;
}

.text-green { color: #10b981; }
.hide { display: none; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer-bottom {
    border-top: 1px solid var(--card-border);
    background: var(--bg-primary);
    padding: 40px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-to-top {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.85rem;
}

.back-to-top:hover {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   ========================================================================== */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-desc {
        margin: 0 auto 32px auto;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-dropdown.show {
        display: flex;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .avatar-container {
        width: 260px;
        height: 260px;
    }
    
    .avatar-glow {
        width: 270px;
        height: 270px;
    }
    
    .tech-tag {
        width: 44px;
        height: 44px;
    }
    
    .tag-icon {
        width: 20px;
        height: 20px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}