:root {
    /* Color Palette */
    --bg-color: #000000;
    --text-primary: #f0f2f5;
    --text-secondary: #a0aec0;
    --accent-1: #10b981; /* Emerald Green */
    --accent-2: #059669; /* Darker Green */
    --accent-3: #34d399; /* Lighter Green */
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    /* Typography */
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
    
    /* Layout */
    --max-width: 1100px;
}

[data-theme="light"] {
    --bg-color: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
}

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    border-radius: 2px;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--glass-shadow);
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.15);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(248, 250, 252, 0.8);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background: var(--accent-1);
    transition: width 0.3s ease;
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(15deg);
    color: var(--accent-2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 0 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
    overflow: hidden;
}

.hero-content {
    flex: 1;
    z-index: 2;
    animation: fadeUp 1s ease forwards;
}

.greeting {
    color: var(--accent-1);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.name {
    font-size: clamp(3.5rem, 8vw, 6rem);
    margin-bottom: 0.5rem;
    line-height: 1.1;
    letter-spacing: -2px;
}

.title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.title .highlight {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.summary {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 2.5rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: var(--accent-1);
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
    border-color: transparent;
}

.hero-graphics {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 500px;
}

.mascot-wrapper {
    position: relative;
    width: 350px;
    height: 350px;
    animation: float 6s infinite alternate ease-in-out;
}

.cute-creature {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 20px 30px rgba(16, 185, 129, 0.3));
}

.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
    color: var(--text-secondary);
    animation: bounce 2s infinite;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 2rem;
}

.about-text h3 {
    margin-bottom: 1rem;
    color: var(--accent-1);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    text-align: center;
    padding: 2.5rem 2rem;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 0;
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-card > * {
    position: relative;
    z-index: 1;
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.1));
    transition: transform 0.3s ease;
}

.skill-card:hover .skill-icon {
    transform: scale(1.2);
}

.skill-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

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

/* Works Section */
.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

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

.work-img {
    height: 200px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.placeholder-1 {
    background: linear-gradient(45deg, #1e293b, #334155);
}
.placeholder-1::after {
    content: 'Project Preview';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255,255,255,0.3);
    font-family: var(--font-heading);
    font-weight: 700;
}
.placeholder-2 {
    background: linear-gradient(45deg, #334155, #1e293b);
}
.placeholder-2::after {
    content: 'Dashboard Preview';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255,255,255,0.3);
    font-family: var(--font-heading);
    font-weight: 700;
}

.work-card:hover .work-img {
    transform: scale(1.05);
}

.work-img {
    transition: transform 0.5s ease;
}

.work-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.work-content h3 {
    margin-bottom: 0.5rem;
}

.work-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex: 1;
}

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

.tags span {
    font-size: 0.75rem;
    padding: 0.3rem 0.8rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-1);
    border-radius: 20px;
    font-weight: 600;
}

/* Contact Section */
.contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem;
}

.contact-text {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    position: relative;
}

.input-group input,
.input-group textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    outline: none;
}

[data-theme="light"] .input-group input,
[data-theme="light"] .input-group textarea {
    background: rgba(255, 255, 255, 0.5);
}

.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.input-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    pointer-events: none;
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group textarea:focus + label,
.input-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.8rem;
    font-size: 0.8rem;
    background: var(--bg-color);
    padding: 0 0.4rem;
    color: var(--accent-1);
    border-radius: 4px;
}

.submit-btn {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-3));
    color: white;
    border: none;
    border-radius: 30px;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-left: 4px solid var(--accent-1);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    color: var(--text-primary);
    animation: slideIn 0.3s ease forwards;
}

/* Animations */
@keyframes float {
    0% { transform: translate(0, 0); }
    50% { transform: translate(20px, -20px) scale(1.05); }
    100% { transform: translate(-10px, 10px) scale(0.95); }
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translate(-50%, 0); }
    40% { transform: translate(-50%, -15px); }
    60% { transform: translate(-50%, -7px); }
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Observers classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple mobile nav */
    }
    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: 6rem;
    }
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }
}