/* --- Global Theme Variables --- */
:root {
    --transition-speed: 0.3s;
    --font-main: 'Inter', sans-serif;
    --font-code: 'Fira Code', monospace;
    
    /* Dark Theme Default variables */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    --shadow: rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --accent: #0ea5e9;
    --accent-hover: #0284c7;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(15, 23, 42, 0.08);
    --shadow: rgba(15, 23, 42, 0.05);
}

/* --- Base Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-padding {
    padding: 100px 0;
}

.bg-alt {
    background-color: var(--bg-secondary);
}

.accent {
    color: var(--accent);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--accent);
    color: #ffffff !important;
}

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

.btn-secondary {
    border-color: var(--accent);
    color: var(--text-primary);
    margin-left: 15px;
}

.btn-secondary:hover {
    background-color: var(--accent);
    color: #ffffff !important;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    background-color: var(--accent);
    color: white !important;
    text-decoration: none;
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-secondary) !important;
    margin-left: 8px;
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent) !important;
}

/* --- Glassmorphism Base --- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 var(--shadow);
    border-radius: 12px;
}

/* --- Sticky Navigation Bar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: padding 0.3s;
    padding: 20px 0;
}

.navbar.scrolled {
    padding: 12px 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: var(--font-code);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s;
}

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

.btn-contact-nav {
    background: var(--accent);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
}

.btn-contact-nav:hover {
    background: var(--accent-hover);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: 0.3s;
}

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

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.hero-greeting {
    font-family: var(--font-code);
    color: var(--accent);
    margin-bottom: 10px;
}

.hero-name {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
}

.hero-title {
    font-size: 2.5rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-summary {
    max-width: 540px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}
/* 
.cursor {
    animation: blink 0.7s infinite;
}

.image-wrapper {
    position: relative;
    max-width: 360px;
    margin: 0 auto;
}

.image-wrapper::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    top: 15px;
    left: 15px;
    z-index: -1;
    border-radius: 12px;
    transition: 0.3s;
}

.image-wrapper:hover::after {
    top: 8px;
    left: 8px;
} */

/* .profile-img {
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
    filter: grayscale(20%) contrast(110%);
} */

/* --- About Section --- */
.about-content {
    max-width: 800px;
    font-size: 1.1rem;
}
.about-content p {
    margin-bottom: 20px;
}

/* --- Skills Layout --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.skill-card {
    padding: 30px;
    transition: transform 0.3s;
}

.skill-card:hover {
    transform: translateY(-5px);
}

.skill-card h3 {
    margin-bottom: 20px;
    font-size: 1.25rem;
}

.skill-card ul {
    list-style: none;
}

.skill-card li {
    margin-bottom: 15px;
    font-weight: 500;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(0,0,0,0.1);
    border-radius: 3px;
    margin-top: 5px;
    overflow: hidden;
}

.progress-bar span {
    display: block;
    height: 100%;
    background-color: var(--accent);
    border-radius: 3px;
}

.tag-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* --- Project Grid Systems --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 25px;
    transition: 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
}

.project-tag {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
}

.project-content h3 {
    margin: 10px 0;
    font-size: 1.5rem;
}

.project-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.project-tech span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(0,0,0,0.15);
    padding: 2px 8px;
    border-radius: 4px;
}

/* --- Custom Timeline System --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: var(--glass-border);
    top: 0;
    bottom: 0;
    left: 30px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 60px;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--accent);
    border-radius: 50%;
    left: 23px;
    top: 24px;
    z-index: 2;
}

.timeline-date {
    font-family: var(--font-code);
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 5px;
}

.timeline-content {
    padding: 25px;
}

.timeline-sub {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

/* --- Why Work With Me Layout --- */
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}

.value-card {
    padding: 30px;
    text-align: center;
}

.value-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 15px;
}

.value-card h3 {
    margin-bottom: 10px;
}

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

/* --- Contact & Forms --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.info-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 30px;
}

.info-links a {
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.1rem;
    transition: color 0.2s;
}

.info-links a:hover {
    color: var(--accent);
}

.contact-form {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    background: rgba(0,0,0,0.1);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: var(--font-main);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* --- Footer Infrastructure --- */
footer {
    background: #0b0f19;
    color: #ffffff;
    padding: 50px 0 20px;
}

[data-theme="light"] footer {
    background: #0f172a;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.footer-socials {
    display: flex;
    gap: 20px;
}

.footer-socials a {
    color: #ffffff;
    font-size: 1.5rem;
    transition: color 0.2s;
}

.footer-socials a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: #64748b;
}

/* --- Utility Engine Elements --- */
#back-to-top {
    position: fixed;
    bottom: 30px;
    right: -60px;
    width: 45px;
    height: 45px;
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: 0.4s ease;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

#back-to-top.show {
    right: 30px;
}

/* Scroll reveal helper classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

@keyframes blink {
    50% { opacity: 0; }
}

/* --- Responsive Breakpoints --- */
@media (max-width: 968px) {
    .hero-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero-image-container {
        order: -1;
        margin-bottom: 30px;
    }
    .hero-name { font-size: 3rem; }
    .hero-title { font-size: 1.8rem; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        transition: 0.4s ease;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    }
    .nav-menu.active { right: 0; }
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}