/* ================================
   PORTFOLIO STYLESHEET
   Modern, Responsive, Dark/Light Theme
   ================================ */

/* ========================
   CSS Variables (Theme Colors)
   ======================== */
 :root {
    /* Light Theme (High-Tech) */
    --bg-primary: #f7f9ff;
    --bg-secondary: #eef3ff;
    --bg-tertiary: #e3e9ff;
    --text-primary: #0b1020;
    --text-secondary: #2a345a;
    --text-tertiary: #5a6aa6;
    --accent-primary: #2dd4ff;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #60a5fa;
    --border-color: rgba(60, 80, 140, 0.2);
    --shadow: 0 20px 60px rgba(18, 26, 48, 0.18);
    --shadow-light: 0 8px 30px rgba(18, 26, 48, 0.08);
    --glow: 0 0 18px rgba(45, 212, 255, 0.4);
    --glow-strong: 0 0 30px rgba(124, 58, 237, 0.45);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Transitions */
    --transition: all 0.35s ease;
    --transition-slow: all 0.8s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0a1628;
    --bg-secondary: #0d1224;
    --bg-tertiary: #131a33;
    --text-primary: #eaf2ff;
    --text-secondary: #b8c4e6;
    --text-tertiary: #7f8bb0;
    --border-color: rgba(110, 140, 255, 0.18);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.65);
    --shadow-light: 0 10px 35px rgba(0, 0, 0, 0.45);
    --glow: 0 0 18px rgba(45, 212, 255, 0.55);
    --glow-strong: 0 0 36px rgba(124, 58, 237, 0.6);
}

/* ========================
   Global Styles
   ======================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    background-image: radial-gradient(600px 400px at 20% 0%, rgba(45, 212, 255, 0.08), transparent 60%),
        radial-gradient(800px 500px at 100% 20%, rgba(124, 58, 237, 0.1), transparent 60%);
    color: var(--text-primary);
    transition: var(--transition);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

body.theme-transition * {
    transition: var(--transition-slow) !important;
}

/* ========================
   Utility Classes
   ======================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.btn {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: var(--shadow-light), var(--glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(45, 212, 255, 0.25), var(--glow-strong);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid rgba(45, 212, 255, 0.6);
    box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.3);
}

.btn-secondary:hover {
    background: rgba(45, 212, 255, 0.12);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
    z-index: -1;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================
   Loading Screen
   ======================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeOut 1.5s ease-in-out forwards;
    animation-delay: 1.5s;
}

.loading-spinner {
    text-align: center;
}

.spinner-ring {
    display: inline-block;
    width: 60px;
    height: 60px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-spinner p {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        pointer-events: none;
    }
}

/* ========================
   Navbar
   ======================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    z-index: 1000;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
}

[data-theme="dark"] .navbar {
    background: rgba(7, 10, 22, 0.7);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--accent-primary);
    box-shadow: var(--shadow-light);
    display: block;
}

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

.logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.3s ease;
}

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

.theme-toggle {
    background: transparent;
    border: 1px solid rgba(45, 212, 255, 0.6);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    box-shadow: var(--glow);
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    transform: rotate(20deg);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        padding: 0;
        box-shadow: var(--shadow-light);
    }

    .nav-menu.active {
        max-height: 400px;
        padding: var(--spacing-lg) 0;
    }

    .nav-menu li {
        padding: 0.5rem var(--spacing-lg);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-container {
        gap: 0.75rem;
    }

    .nav-toggle {
        order: 3;
    }

    .theme-toggle {
        order: 2;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(10px, 10px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
}

/* ========================
   Animated Background
   ======================== */
.particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-primary);
}

.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(1200px 800px at 20% 10%, rgba(45, 212, 255, 0.06), transparent 60%),
        radial-gradient(900px 700px at 80% 80%, rgba(124, 58, 237, 0.08), transparent 55%),
        transparent;
    z-index: -2;
    transition: background 1s ease;
    overflow: hidden;
    pointer-events: none;
}

.bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 140, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 140, 255, 0.08) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(circle at 50% 40%, rgba(0, 0, 0, 0.8), transparent 70%);
    opacity: 0.6;
}

.neural-lines {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(45, 212, 255, 0.18), transparent 30%),
        radial-gradient(circle at 70% 60%, rgba(124, 58, 237, 0.18), transparent 35%),
        radial-gradient(circle at 50% 80%, rgba(96, 165, 250, 0.16), transparent 40%);
    mix-blend-mode: screen;
    animation: pulseGlow 10s ease-in-out infinite;
}

.cursor-glow {
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(45, 212, 255, 0.2), transparent 60%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    filter: blur(6px);
    opacity: 0.7;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 10s ease-in-out infinite;
    opacity: 0.3;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--accent-tertiary), var(--accent-primary));
    bottom: -100px;
    left: -100px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, 30px); }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.04); }
}

/* Floating Particles */
.particle {
    position: fixed;
    pointer-events: none;
    opacity: 0.3;
    z-index: -1;
}

.particle-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
}

/* ========================
   Hero Section
   ======================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 120px var(--spacing-lg) var(--spacing-xl);
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    line-height: 1.5;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.typing-text::after {
    content: '';
}

.cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background: var(--accent-primary);
    margin-left: 5px;
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hero-subtitle-secondary {
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-visualization {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 450px;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
}



.detail-close-hint {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-align: center;
    font-style: italic;
}

.holo-card {
    margin-top: 1.5rem;
    padding: 1.25rem 1.5rem;
    border-radius: 1rem;
    background: rgba(12, 18, 36, 0.45);
    border: 1px solid rgba(124, 58, 237, 0.3);
    box-shadow: var(--shadow-light), var(--glow);
    backdrop-filter: blur(14px);
    color: var(--text-primary);
    width: 100%;
    max-width: 420px;
}

.holo-title {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-tertiary);
    margin-bottom: 0.75rem;
}

.holo-metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px dashed rgba(120, 140, 255, 0.2);
}

.holo-metric:last-child {
    border-bottom: none;
}

.holo-metric strong {
    color: var(--accent-primary);
    text-shadow: var(--glow);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }

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


@media (max-width: 768px) {
    .hero {
        padding: 100px var(--spacing-md) var(--spacing-lg);
    }

    .hero-visualization {
        min-height: auto;
    }

    .holo-card {
        max-width: 100%;
    }
}

/* ========================
   Fade In Animations
   ======================== */
.fade-in-left,
.fade-in-right,
.fade-in-bottom {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in-left {
    animation-name: fadeInLeft;
}

.fade-in-right {
    animation-name: fadeInRight;
}

.fade-in-bottom {
    animation-name: fadeInUp;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========================
   About Section
   ======================== */
.about {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text p:first-child {
    animation-delay: 0.2s;
}

.about-text p:nth-child(2) {
    animation-delay: 0.4s;
}

.about-text p:nth-child(3) {
    animation-delay: 0.6s;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(120, 140, 255, 0.2);
    transition: var(--transition);
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.stat h3 {
    font-size: 2.5rem;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.stat p {
    color: var(--text-tertiary);
    margin: 0;
}

/* Profile Card */
.profile-card {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.profile-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(99, 102, 241, 0.2);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    background: var(--bg-secondary);
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 3rem;
}

.profile-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.profile-card .role {
    color: var(--accent-primary);
    font-weight: 600;
}

.profile-card .role-desc {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.terminal-card {
    margin-top: 1.5rem;
    border-radius: 0.9rem;
    background: rgba(10, 14, 28, 0.7);
    border: 1px solid rgba(45, 212, 255, 0.25);
    box-shadow: var(--shadow-light);
    overflow: hidden;
    backdrop-filter: blur(12px);
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid rgba(120, 140, 255, 0.2);
    background: rgba(255, 255, 255, 0.03);
}

.terminal-title {
    margin-left: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.terminal-header .dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    display: inline-block;
}

.terminal-header .red { background: #ff5f56; }
.terminal-header .yellow { background: #ffbd2e; }
.terminal-header .green { background: #27c93f; }

.terminal-body {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #d7e6ff;
    padding: 1rem;
    white-space: pre-wrap;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
    }

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

    .about-image {
        order: -1;
    }
}

/* ========================
   Skills Section
   ======================== */
.skills {
    padding: var(--spacing-2xl) var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.skill-card {
    background: rgba(255, 255, 255, 0.04);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid rgba(120, 140, 255, 0.18);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.skill-card:hover {
    background: rgba(255, 255, 255, 0.07);
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.skill-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--accent-primary);
}

.skill-category {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: 1rem;
}

.skill-bar {
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.skill-label {
    font-size: 0.75rem;
    color: white;
    font-weight: 700;
}

/* Tech Stack */
.tech-stack {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.tech-stack h3 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.tech-badge {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.tech-badge:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

/* ========================
   Projects Section
   ======================== */
.projects {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    position: relative;
    z-index: 1;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    background: rgba(255, 255, 255, 0.04);
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid rgba(120, 140, 255, 0.2);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-light);
    backdrop-filter: blur(12px);
    animation-delay: 0.1s;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    border-color: rgba(45, 212, 255, 0.6);
}

.project-image {
    width: 100%;
    height: 250px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.project-placeholder {
    width: 100%;
    height: 100%;
}

.project-placeholder svg {
    width: 100%;
    height: 100%;
}

.project-image:hover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
    animation: shimmer 0.5s ease;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.project-content {
    padding: 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: var(--bg-secondary);
    color: var(--accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
}

.project-links {
    display: flex;
    gap: 1rem;
}

.link-btn {
    flex: 1;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    color: var(--accent-primary);
    text-decoration: none;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.link-btn:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

/* ========================
   Resume Section
   ======================== */
.resume {
    padding: var(--spacing-2xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    position: relative;
    z-index: 1;
}

.resume-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.resume-description h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.resume-description p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.credentials {
    display: grid;
    gap: 1rem;
    margin-top: var(--spacing-lg);
}

.credential-item {
    background: var(--bg-primary);
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
}

.credential-item h4 {
    margin-bottom: 0.5rem;
    color: var(--accent-primary);
    font-size: 1rem;
}

.credential-item p {
    margin: 0;
    color: var(--text-tertiary);
    font-size: 0.95rem;
}

.download-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.download-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    margin-bottom: 0.5rem;
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.resume-note {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .resume-content {
        grid-template-columns: 1fr;
    }
}

/* ========================
   Contact Section
   ======================== */
.contact {
    padding: var(--spacing-2xl) var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: var(--spacing-lg);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-link:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateX(5px);
}

.contact-link .icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    position: relative;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-tertiary);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--bg-primary);
}

.error-message {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.25rem;
    min-height: 1.2rem;
}

.form-feedback {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
    text-align: center;
    display: none;
}

.form-feedback.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-feedback.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.download-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.download-section .label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    display: block;
    margin-bottom: 0.75rem;
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* ========================
   Footer
   ======================== */
.footer {
    background: var(--bg-secondary);
    padding: 2rem var(--spacing-lg);
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.footer p {
    margin: 0.5rem 0;
}

.heart {
    color: var(--accent-tertiary);
    animation: heartBeat 0.8s ease-in-out infinite;
    display: inline-block;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ========================
   Technical Journey Chart
   ======================== */
.journey-chart-container {
    width: 100%;
    max-width: 900px;
    margin: 3rem auto 0;
    padding: 0 var(--spacing-md);
}

.chart-card {
    position: relative;
    background: linear-gradient(135deg, rgba(45, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: var(--spacing-lg);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-light), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: var(--transition);
    animation: slideUp 0.8s ease-out;
}

[data-theme="dark"] .chart-card {
    background: linear-gradient(135deg, rgba(45, 212, 255, 0.08), rgba(124, 58, 237, 0.08));
    border: 1px solid rgba(45, 212, 255, 0.2);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chart-card:hover {
    border-color: rgba(45, 212, 255, 0.4);
    box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Chart Info Icon */
.chart-info-icon {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 44px;
    height: 44px;
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    background: rgba(45, 212, 255, 0.1);
    color: var(--accent-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
    box-shadow: 0 0 12px rgba(45, 212, 255, 0.3);
}

.chart-info-icon:hover {
    background: rgba(45, 212, 255, 0.2);
    box-shadow: 0 0 24px rgba(45, 212, 255, 0.5), inset 0 0 12px rgba(45, 212, 255, 0.2);
    transform: scale(1.1);
}

.chart-info-icon:active {
    transform: scale(0.95);
}

.chart-info-icon svg {
    width: 24px;
    height: 24px;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Chart Header */
.chart-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.chart-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.chart-subtitle {
    color: var(--text-tertiary);
    font-size: 0.95rem;
    margin: 0;
}

/* Chart Wrapper */
.chart-wrapper {
    position: relative;
    height: 400px;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
}

.chart-wrapper canvas {
    max-height: 400px;
}

/* Chart Legend */
.chart-legend {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(45, 212, 255, 0.02);
    border: 1px solid rgba(45, 212, 255, 0.1);
    border-radius: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.legend-item:hover {
    background: rgba(45, 212, 255, 0.08);
    transform: translateX(4px);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
    transition: var(--transition);
}

.legend-item:hover .legend-color {
    transform: scale(1.15);
    box-shadow: 0 0 8px currentColor;
}

.legend-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    user-select: none;
    transition: var(--transition);
}

.legend-item:hover .legend-label {
    color: var(--accent-primary);
}

.legend-item.active {
    background: rgba(45, 212, 255, 0.12);
}

.legend-item.dimmed {
    opacity: 0.4;
}

/* Chart Info Panel */
.chart-info-panel {
    min-height: 50px;
    padding: var(--spacing-md);
    background: rgba(20, 184, 166, 0.08);
    border-left: 3px solid var(--accent-tertiary);
    border-radius: 0.5rem;
    margin-top: var(--spacing-md);
    animation: fadeInUp 0.5s ease-out;
    transition: var(--transition);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#techStackDescription {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

/* Modal */
.chart-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.chart-modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(135deg, rgba(13, 18, 36, 0.95), rgba(19, 26, 51, 0.95));
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    padding: var(--spacing-2xl);
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    animation: slideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(45, 212, 255, 0.1);
    border-radius: 50%;
    font-size: 2rem;
    color: var(--accent-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: rgba(45, 212, 255, 0.2);
    transform: rotate(90deg) scale(1.1);
}

.modal-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.journey-milestone {
    padding: var(--spacing-md);
    background: rgba(45, 212, 255, 0.05);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0.5rem;
    transition: var(--transition);
}

.journey-milestone:hover {
    background: rgba(45, 212, 255, 0.1);
    transform: translateX(4px);
}

.journey-milestone h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--accent-primary);
}

.journey-milestone p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0.5rem 0;
    line-height: 1.6;
}

.journey-milestone strong {
    color: var(--accent-primary);
}

.journey-milestone ul {
    margin: 0.75rem 0 0 1.5rem;
    padding-left: 0;
}

.journey-milestone li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0.4rem 0;
}

.journey-note {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-style: italic;
    padding: var(--spacing-md);
    background: rgba(124, 58, 237, 0.05);
    border-left: 3px solid var(--accent-secondary);
    border-radius: 0.5rem;
}

/* Chart Line Hover States */
.chart-card canvas {
    transition: filter 0.3s ease;
}

.chart-card canvas.dimmed {
    filter: brightness(0.7);
}

/* Responsive Chart */
@media (max-width: 768px) {
    .chart-wrapper {
        height: 300px;
    }

    .chart-legend {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: var(--spacing-lg);
        padding: var(--spacing-lg);
    }

    .chart-header h3 {
        font-size: 1.2rem;
    }

    .chart-subtitle {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .chart-card {
        padding: var(--spacing-md);
    }

    .chart-info-icon {
        width: 40px;
        height: 40px;
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }

    .chart-info-icon svg {
        width: 20px;
        height: 20px;
    }

    .chart-wrapper {
        height: 250px;
    }

    .chart-legend {
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }

    .modal-close {
        width: 36px;
        height: 36px;
        font-size: 1.5rem;
    }
}

/* ========================
   Responsive Design
   ======================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2.5rem;
        --spacing-2xl: 3rem;
    }

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

    .hero {
        padding: 100px var(--spacing-md) var(--spacing-lg);
    }

    .hero-title {
        font-size: clamp(1.8rem, 5vw, 3rem);
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .nav-menu {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .stat h3 {
        font-size: 2rem;
    }

    .project-links {
        flex-direction: column;
    }

    .contact-links {
        gap: 0.75rem;
    }
}

/* ========================
   Utility Animations
   ======================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Smooth Scrollbar Styling (Webkit Browsers) */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* Print Styles */
@media print {
    .navbar,
    .loading-screen,
    .animated-bg,
    .footer {
        display: none;
    }

    body {
        background: white;
        color: black;
    }
}