/* 
   ========================================
   PORTFOLIO CSS (Vanilla CSS)
   ========================================
*/

:root {
    --bg-color: #0B0F14;
    --surface-color: #131A24;
    --border-color: #1E2836;
    --accent-color: #4DA3FF;
    --accent-hover: #3182CE;
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 1100px;
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { font-family: var(--font-body); background-color: var(--bg-color); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--text-primary); font-weight: 700; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--spacing-md); }
.section { padding: var(--spacing-xl) 0; }
.section-title { font-size: 2rem; margin-bottom: var(--spacing-lg); position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; bottom: -8px; left: 0; width: 40px; height: 3px; background-color: var(--accent-color); border-radius: 2px; }
.bg-surface { background-color: var(--surface-color); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }

.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 24px; border-radius: var(--border-radius); font-weight: 500; font-family: var(--font-body); cursor: pointer; transition: var(--transition); border: 2px solid transparent; }
.btn-sm { padding: 8px 16px; font-size: 0.9rem; }
.btn-primary { background-color: var(--accent-color); color: #fff; position: relative; overflow: hidden; z-index: 1; }
.btn-primary::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background-color: var(--accent-hover); transition: var(--transition); z-index: -1; }
.btn-primary:hover::before { left: 0; }
.btn-outline { background-color: transparent; border-color: var(--accent-color); color: var(--accent-color); }
.btn-outline:hover { background-color: var(--accent-color); color: #fff; }

.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background-color: rgba(11, 15, 20, 0.85); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid transparent; transition: var(--transition); }
.header.scrolled { border-bottom-color: var(--border-color); box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3); }
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 80px; }
.logo { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; letter-spacing: -0.5px; }
.logo span { color: var(--accent-color); }
.nav-list { display: flex; gap: var(--spacing-lg); }
.nav-link { font-size: 0.95rem; color: var(--text-secondary); font-weight: 500; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--accent-color); }
.hamburger { display: none; cursor: pointer; background: none; border: none; padding: 8px; z-index: 101; }
.hamburger .bar { display: block; width: 24px; height: 2px; margin: 5px auto; background-color: var(--text-primary); transition: var(--transition); }

.hero { min-height: 100vh; display: flex; align-items: center; justify-content: space-between; padding-top: 80px; }
.hero-content { flex: 1; max-width: 600px; }
.greeting { color: var(--accent-color); font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: var(--spacing-sm); display: block; }
.hero-title { font-size: clamp(3rem, 5vw, 4.5rem); line-height: 1.1; margin-bottom: var(--spacing-xs); }
.hero-subtitle { font-size: clamp(1.5rem, 3vw, 2.5rem); color: var(--text-secondary); margin-bottom: var(--spacing-md); }
.gradient-text { background: linear-gradient(90deg, var(--accent-color), #A78BFA); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: var(--spacing-lg); max-width: 500px; }
.hero-buttons { display: flex; gap: var(--spacing-sm); }
.hero-visual { flex: 1; display: flex; justify-content: flex-end; align-items: center; position: relative; }

/* TERMINAL VISUAL CSS */
.terminal-box {
    width: 100%;
    max-width: 450px;
    background-color: #0F172A; /* Kali dark theme look */
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0,0,0,0.5), 0 0 20px rgba(77, 163, 255, 0.1);
    overflow: hidden;
    font-family: 'Courier New', Courier, monospace;
}
.terminal-header {
    background-color: #1E293B;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}
.terminal-buttons {
    display: flex;
    gap: 8px;
    position: absolute;
    left: 15px;
}
.terminal-buttons span {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.btn-close { background-color: #FF5F56; }
.btn-min { background-color: #FFBD2E; }
.btn-max { background-color: #27C93F; }

.terminal-title {
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-family: var(--font-body);
}
.terminal-body {
    padding: 20px;
    color: #E2E8F0;
    font-size: 0.9rem;
    line-height: 1.6;
}
.prompt {
    color: var(--accent-color);
    font-weight: bold;
}
.typing-text {
    display: inline-flex;
    overflow: hidden;
    white-space: nowrap;
    animation: typing 1.5s steps(35, end) forwards;
    max-width: 0;
}
.output {
    opacity: 0;
    margin-top: 5px;
    color: #94A3B8;
}
.delay-1 { animation: fadeIn 0.1s forwards 1.6s; }
.delay-2 { animation: fadeIn 0.1s forwards 2.2s; }
.delay-3 { animation: fadeIn 0.1s forwards 2.8s; }
.delay-4 { animation: fadeIn 0.1s forwards 3.4s; }

.text-accent {
    color: #4ADE80;
    font-weight: bold;
    margin: 10px 0;
}
.prompt-new {
    opacity: 0;
    margin-top: 15px;
    animation: fadeIn 0.1s forwards 4s;
}
.cursor {
    display: inline-block;
    width: 8px;
    height: 15px;
    background-color: #E2E8F0;
    vertical-align: middle;
    margin-left: 2px;
    animation: blink 1s step-end infinite;
}

@keyframes typing { to { max-width: 400px; } }
@keyframes fadeIn { to { opacity: 1; } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); align-items: center; }
.about-text p { color: var(--text-secondary); margin-bottom: var(--spacing-sm); }
.about-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--spacing-md); }
.stat-box { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-md); text-align: center; transition: var(--transition); }
.stat-box:hover { transform: translateY(-5px); border-color: var(--accent-color); box-shadow: 0 10px 30px -10px rgba(77, 163, 255, 0.1); }
.stat-number { display: block; font-size: 1.8rem; font-family: var(--font-heading); color: var(--accent-color); font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-xs); }
.stat-label { color: var(--text-secondary); font-size: 0.9rem; }

.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-md); }
.skill-card { background-color: var(--bg-color); border: 1px solid var(--border-color); padding: var(--spacing-md); border-radius: var(--border-radius); display: flex; flex-direction: column; gap: var(--spacing-xs); transition: var(--transition); }
.skill-card:hover { border-color: var(--accent-color); transform: translateY(-3px); }
.skill-card h3 { font-size: 1.1rem; color: var(--accent-color); }
.skill-level { font-size: 0.9rem; color: var(--text-primary); }

.projects-subtitle { color: var(--text-secondary); margin-bottom: var(--spacing-lg); font-size: 1.05rem; }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--spacing-lg); }
.project-card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.project-card:hover { transform: translateY(-8px); border-color: var(--accent-color); box-shadow: 0 10px 30px -15px rgba(77, 163, 255, 0.2); }
.project-img-placeholder { width: 100%; height: 200px; }
.var-1 { background: linear-gradient(135deg, #1E293B, #334155); }
.var-2 { background: linear-gradient(135deg, #0F172A, #1E293B); }
.var-3 { background: linear-gradient(135deg, #172554, #1E3A8A); }
.project-content { padding: var(--spacing-md); display: flex; flex-direction: column; flex: 1; }
.project-title { font-size: 1.25rem; margin-bottom: var(--spacing-xs); }
.project-desc { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: var(--spacing-md); flex: 1; }
.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; }
.project-tags span { background-color: rgba(77, 163, 255, 0.1); color: var(--accent-color); padding: 4px 10px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; }

.timeline { position: relative; max-width: 800px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; top: 0; left: 20px; height: 100%; width: 2px; background-color: var(--border-color); }
.timeline-item { position: relative; padding-left: 50px; margin-bottom: var(--spacing-lg); }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item::before { content: ''; position: absolute; top: 5px; left: 15px; width: 12px; height: 12px; border-radius: 50%; background-color: var(--accent-color); border: 3px solid var(--surface-color); box-shadow: 0 0 0 2px var(--accent-color); }
.timeline-title { font-size: 1.2rem; margin-bottom: 2px; }
.timeline-company { font-size: 1rem; color: var(--accent-color); font-weight: 500; margin-bottom: var(--spacing-sm); }
.timeline-content ul { list-style: disc; padding-left: 20px; color: var(--text-secondary); }
.timeline-content li { margin-bottom: 6px; font-size: 0.95rem; }

.contact-card { background-color: var(--surface-color); border: 1px solid var(--border-color); border-radius: var(--border-radius); padding: var(--spacing-xl) var(--spacing-md); text-align: center; max-width: 800px; margin: 0 auto; }
.contact-desc { color: var(--text-secondary); margin: var(--spacing-md) auto var(--spacing-lg); max-width: 500px; }
.social-links { display: flex; justify-content: center; gap: var(--spacing-md); margin-top: var(--spacing-lg); }
.social-links a { display: flex; align-items: center; justify-content: center; width: 54px; height: 54px; background-color: var(--bg-color); border: 1px solid var(--border-color); border-radius: 50%; color: var(--text-primary); transition: var(--transition); }
.social-links a:hover { background-color: var(--accent-color); border-color: var(--accent-color); color: #fff; transform: translateY(-3px); }

.footer { border-top: 1px solid var(--border-color); padding: var(--spacing-md) 0; background-color: var(--surface-color); }
.footer-content { display: flex; justify-content: space-between; align-items: center; color: var(--text-secondary); font-size: 0.9rem; }
.back-to-top { background-color: var(--bg-color); border: 1px solid var(--border-color); color: var(--text-primary); width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); opacity: 0; visibility: hidden; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background-color: var(--accent-color); border-color: var(--accent-color); color: #fff; }

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

@media (max-width: 1200px) { :root { --spacing-xl: 48px; } }
@media (max-width: 768px) {
    .nav-list { position: fixed; top: 80px; left: -100%; width: 100%; height: calc(100vh - 80px); background-color: var(--bg-color); flex-direction: column; align-items: center; justify-content: center; gap: var(--spacing-lg); transition: 0.4s ease-in-out; }
    .nav-list.active { left: 0; }
    .hamburger { display: block; }
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .hero { flex-direction: column; text-align: center; padding-top: 120px; gap: var(--spacing-lg); }
    .hero-buttons { justify-content: center; }
    .hero-visual { justify-content: center; margin-top: var(--spacing-lg); width: 100%; }
    .terminal-box { max-width: 100%; }
    .about-grid { grid-template-columns: 1fr; }
    .timeline::before { left: 0; }
    .timeline-item { padding-left: 30px; }
    .timeline-item::before { left: -5px; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.25rem; }
    .hero-buttons { flex-direction: column; width: 100%; }
    .btn { width: 100%; }
    .projects-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; gap: var(--spacing-md); text-align: center; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; } .reveal { opacity: 1; transform: none; transition: none; } }
:focus-visible { outline: 2px dashed var(--accent-color); outline-offset: 4px; }