:root {

        --bg-color: #020617;        /* slate-950 */
        --bg-card: #0f172a;         /* slate-900 */
        --bg-card-hover: #1e293b;   /* slate-800 */
        --text-main: #cbd5e1;       /* slate-300 */
        --text-muted: #94a3b8;      /* slate-400 */
        --text-white: #ffffff;
        
        --brand-primary: #0ea5e9;   /* sky-500 */
        --brand-hover: #0284c7;     /* sky-600 */
        --brand-glow: rgba(14, 165, 233, 0.2);
        
        --border-color: #1e293b;    /* slate-800 */
        --border-light: rgba(255, 255, 255, 0.1);
        
        --navbar-bg: rgba(2, 6, 23, 0.85);
        --bg-darker: rgba(15, 23, 42, 0.5);
        --icon-bg: #1e293b;
        --input-border: #334155;

        /* Typography */
        --font-body: 'Inter', sans-serif;
        --font-display: 'Syne', sans-serif;
      }

      body.light-mode {
        --bg-color: #f8fafc;        /* slate-50 */
        --bg-card: #ffffff;         /* white */
        --bg-card-hover: #f1f5f9;   /* slate-100 */
        --text-main: #334155;       /* slate-700 */
        --text-muted: #64748b;      /* slate-500 */
        --text-white: #0f172a;      /* slate-900 */
        
        --border-color: #e2e8f0;    /* slate-200 */
        --border-light: rgba(0, 0, 0, 0.1);
        --brand-glow: rgba(14, 165, 233, 0.1);
        
        --navbar-bg: rgba(248, 250, 252, 0.85);
        --bg-darker: rgba(241, 245, 249, 0.5);
        --icon-bg: #e2e8f0;
        --input-border: #cbd5e1;
      }

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

      html {
        scroll-behavior: smooth;
      }

      body {
        background-color: var(--bg-color);
        color: var(--text-main);
        font-family: var(--font-body);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
      }

      ::selection {
        background-color: var(--brand-primary);
        color: var(--text-white);
      }

      /* Custom Scrollbar */
      ::-webkit-scrollbar {
        width: 10px;
      }
      ::-webkit-scrollbar-track {
        background: #0f172a; 
      }
      ::-webkit-scrollbar-thumb {
        background: #334155; 
        border-radius: 5px;
      }
      ::-webkit-scrollbar-thumb:hover {
        background: #475569; 
      }

      /* Utilities */
      .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 1.5rem;
      }

      a {
        text-decoration: none;
        color: inherit;
        transition: color 0.3s ease;
      }

      h1, h2, h3 {
        font-family: var(--font-display);
        color: var(--text-white);
        font-weight: 700;
      }

      .text-brand { color: var(--brand-primary); }
      .text-gradient {
        background: linear-gradient(to right, var(--brand-primary), #a855f7);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
      }

      /* Navigation */
      .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        background-color: var(--navbar-bg);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-light);
        padding: 1rem 0;
      }

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

      .logo {
        font-family: var(--font-display);
        font-size: 1.5rem;
        font-weight: 700;
        letter-spacing: 0.025em;
        color: var(--text-white);
      }

      .nav-links {
        display: none;
      }

      @media(min-width: 768px) {
        .nav-links {
          display: flex;
          gap: 2rem;
          align-items: center;
          font-weight: 500;
          font-size: 0.9rem;
        }
      }

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

      .btn-cta {
        background-color: var(--text-white);
        color: var(--bg-color);
        padding: 0.6rem 1.25rem;
        border-radius: 9999px;
        font-weight: 600;
        transition: all 0.3s;
      }
      .btn-cta:hover {
        background-color: var(--brand-primary);
        color: var(--text-white);
      }

      .theme-toggle {
        background: none;
        border: none;
        color: var(--text-white);
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0.5rem;
        border-radius: 50%;
        transition: background-color 0.3s;
      }
      .theme-toggle:hover {
        background-color: var(--bg-card-hover);
      }

      /* Mobile Toggle (Visual) */
      .mobile-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text-white);
        cursor: pointer;
      }
      @media(min-width: 768px) {
        .mobile-toggle { display: none; }
      }

      /* Hero Section */
      .hero {
        position: relative;
        min-height: 100vh;
        padding-top: 80px;
        display: flex;
        align-items: center;
        overflow: hidden;
      }

      /* Glow Effects */
      .glow-blob {
        position: absolute;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        filter: blur(100px);
        opacity: 0.2;
        pointer-events: none;
        z-index: 0;
      }
      .glow-right { top: 5rem; right: 0; background-color: var(--brand-primary); }
      .glow-left { bottom: 5rem; left: 0; background-color: #a855f7; }

      .hero-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 3rem;
        align-items: center;
        position: relative;
        z-index: 10;
      }
      @media(min-width: 768px) {
        .hero-grid { grid-template-columns: 1fr 1fr; }
      }

      .hero-badge {
        display: inline-block;
        padding: 0.25rem 0.75rem;
        background-color: var(--bg-card);
        border: 1px solid var(--border-color);
        color: var(--brand-primary);
        font-size: 0.875rem;
        border-radius: 9999px;
        margin-bottom: 1.5rem;
        font-weight: 500;
      }

      .hero-title {
        font-size: 3rem;
        line-height: 1.1;
        margin-bottom: 1.5rem;
      }
      @media(min-width: 768px) {
        .hero-title { font-size: 4.5rem; }
      }

      .hero-desc {
        font-size: 1.125rem;
        color: var(--text-muted);
        margin-bottom: 2rem;
        max-width: 500px;
      }

      .hero-actions {
        display: flex;
        gap: 1rem;
        flex-direction: column;
      }
      @media(min-width: 480px) {
        .hero-actions { flex-direction: row; }
      }

      .btn {
        padding: 0.75rem 2rem;
        border-radius: 0.5rem;
        font-weight: 600;
        text-align: center;
        cursor: pointer;
        display: inline-block;
        transition: background-color 0.3s, transform 0.2s;
      }
      
      .btn-primary {
        background-color: var(--brand-hover);
        color: white;
        box-shadow: 0 4px 15px var(--brand-glow);
      }
      .btn-primary:hover { background-color: var(--brand-primary); }

      .btn-outline {
        border: 1px solid var(--border-color);
        color: white;
      }
      .btn-outline:hover { background-color: var(--bg-card-hover); }

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

      .visual-box {
        width: 250px;
        height: 250px;
        position: relative;
      }
      @media(min-width: 768px) {
        .visual-box { width: 320px; height: 320px; }
      }

      .visual-border {
        position: absolute;
        inset: 0;
        border-radius: 1rem;
        border: 2px solid rgba(14, 165, 233, 0.3);
        transform: rotate(6deg);
        transition: transform 0.3s;
      }
      .visual-border-2 {
        border-color: rgba(168, 85, 247, 0.3);
        transform: rotate(-6deg);
      }
      
      .visual-box:hover .visual-border { transform: rotate(12deg); }
      .visual-box:hover .visual-border-2 { transform: rotate(-12deg); }

      .visual-content {
        position: absolute;
        background: url("/Web development/Portfolio/self/person.png");
        background-size: contain;
        inset: 0;
        background-color: #282f38;
        border-radius: 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
      }

      .initials {
        font-family: var(--font-display);
        font-size: 6rem;
        font-weight: 800;
        color: #334155;
        user-select: none;
      }

      /* About Section */
      .section-padding { padding: 6rem 0; }
      .bg-darker { background-color: var(--bg-darker); }

      .about-container { max-width: 800px; margin: 0 auto; }
      
      .section-heading {
        font-size: 2.5rem;
        margin-bottom: 2rem;
        border-left: 4px solid var(--brand-primary);
        padding-left: 1rem;
      }
      .text-center { text-align: center; }

      .about-text p {
        font-size: 1.125rem;
        color: var(--text-muted);
        margin-bottom: 1.5rem;
        line-height: 1.8;
      }
      .about-text strong { color: var(--text-white); }
      .about-text .highlight { color: #60a5fa; } /* light blue */

      /* Skills Section */
      .skills-grid-layout {
        display: grid;
        gap: 2rem;
        max-width: 1024px;
        margin: 0 auto;
      }
      @media(min-width: 768px) {
        .skills-grid-layout { grid-template-columns: 1fr 1fr; }
      }

      .card {
        background-color: var(--bg-card);
        border: 1px solid var(--border-color);
        padding: 2rem;
        border-radius: 1rem;
        transition: border-color 0.3s;
      }
      .card:hover { border-color: rgba(14, 165, 233, 0.5); }

      .card-title {
        font-size: 1.25rem;
        margin-bottom: 1.5rem;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 1rem;
      }

      .tech-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
      }
      @media(min-width: 480px) {
        .tech-grid { grid-template-columns: repeat(4, 1fr); }
      }

      .tech-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
        cursor: default;
      }

      .icon-wrapper {
        width: 48px;
        height: 48px;
        background-color: var(--icon-bg);
        border-radius: 0.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: transform 0.3s;
      }
      .tech-item:hover .icon-wrapper { transform: scale(1.1); }

      .tech-item img {
        width: 32px;
        height: 32px;
        object-fit: contain;
      }

      .tech-name { font-size: 0.875rem; font-weight: 500; }

      /* Projects Section */
      .section-title-center {
        text-align: center;
        font-size: 2.5rem;
        margin-bottom: 1rem;
      }
      .section-subtitle {
        text-align: center;
        color: var(--text-muted);
        margin-bottom: 4rem;
      }

      .projects-grid {
        display: grid;
        gap: 1.5rem;
      }
      @media(min-width: 768px) {
        .projects-grid { grid-template-columns: repeat(2, 1fr); }
      }
      @media(min-width: 1024px) {
        .projects-grid { grid-template-columns: repeat(3, 1fr); }
      }

      .project-card {
        background-color: var(--bg-color); /* Darker than section bg */
        border: 1px solid var(--border-color);
        border-radius: 0.75rem;
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        height: 100%;
        transition: transform 0.3s;
      }
      .project-card:hover { transform: translateY(-5px); }

      .project-image-placeholder {
        height: 160px;
        background-color: var(--icon-bg);
        border-radius: 0.5rem;
        margin-bottom: 1rem;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .project-placeholder-text {
        font-family: var(--font-display);
        font-size: 1.5rem;
        opacity: 0.2;
        color: white;
      }

      .project-title { font-size: 1.25rem; margin-bottom: 0.5rem; }
      .project-desc { font-size: 0.875rem; color: var(--text-muted); margin-bottom: 1rem; }

      .tag-container { display: flex; gap: 0.5rem; flex-wrap: wrap; }
      .tag {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
        background-color: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: 0.25rem;
        color: var(--text-main);
      }

      /* Contact Section */
      .contact-wrapper { max-width: 672px; margin: 0 auto; }

      .contact-form {
        background-color: var(--bg-card);
        padding: 2rem;
        border-radius: 1rem;
        border: 1px solid var(--border-color);
        box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
      }

      .form-group { margin-bottom: 1.5rem; }
      
      .form-label {
        display: block;
        font-size: 0.875rem;
        font-weight: 600;
        margin-bottom: 0.5rem;
      }

      .form-control {
        width: 100%;
        background-color: var(--bg-color);
        border: 1px solid var(--input-border);
        color: var(--text-main);
        padding: 0.75rem 1rem;
        border-radius: 0.5rem;
        font-family: inherit;
        transition: border-color 0.2s;
      }
      .form-control:focus {
        outline: none;
        border-color: var(--brand-primary);
        box-shadow: 0 0 0 1px var(--brand-primary);
      }
      textarea.form-control { resize: none; }

      .submit-btn {
        width: 100%;
        background-color: var(--brand-hover);
        color: white;
        font-weight: 700;
        padding: 1rem;
        border: none;
        border-radius: 0.5rem;
        cursor: pointer;
        transition: background-color 0.3s;
      }
      .submit-btn:hover { background-color: var(--brand-primary); }

      /* Footer */
      footer {
        padding: 2rem 0;
        background-color: var(--bg-color);
        border-top: 1px solid var(--border-color);
        text-align: center;
        color: #64748b;
        font-size: 0.875rem;
      }

      /* Image fallback styling logic */
      img[src^="assets/"] {
        background-color: rgba(255,255,255,0.05);
        border-radius: 4px;
        position: relative;
      }
      img[src^="assets/"]:after {
        content: "img";
        font-size: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        position: absolute;
        top: 0; left: 0; width: 100%; height: 100%;
        color: #64748b;
        text-align: center;
      }