/* ==========================================================================
   S7VEN Design System - Dark Mode Vanilla CSS
   ========================================================================== */

/* --- Variables --- */
:root {
  /* Colors */
  --bg-color: #050514;
  --bg-surface: #0a0b27;
  --bg-glass: rgba(10, 11, 39, 0.4);
  --bg-glass-hover: rgba(16, 18, 59, 0.6);
  
  --primary: #5757ff;
  --primary-glow: rgba(87, 87, 255, 0.5);
  --primary-hover: #7b7bff;
  
  --accent: #0200da;
  --highlight: #00e5ff;
  --highlight-glow: rgba(0, 229, 255, 0.4);
  --text-main: #fcfcff;
  --text-muted: #9ba1b8;
  
  --border-light: rgba(255, 255, 255, 0.08);
  
  /* Fonts */
  --font-body: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'Source Code Pro', monospace;
  
  /* Utilities */
  --transition-fast: 0.2s ease-out;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* --- Resets --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--primary-hover); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- Typography --- */
h1, h2, h3, h4, h5 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; }
.hero-title { font-size: clamp(3rem, 5vw, 4.5rem); font-weight: 800; letter-spacing: -2px; margin-bottom: 1rem; }
.hero-title span { color: var(--highlight); text-shadow: 0 0 20px var(--highlight-glow); }
.hero-subtitle { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 2rem; max-width: 600px; }

.section-title { margin-bottom: 4rem; position: relative; }
.outline-text {
  font-size: clamp(4rem, 8vw, 8rem);
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.05);
  font-family: var(--font-mono);
  position: absolute;
  top: -50%;
  left: 0;
  z-index: -1;
  pointer-events: none;
  text-transform: uppercase;
}
.section-title h3 { font-size: 2.5rem; }
.section-title p { color: var(--text-muted); font-size: 1.1rem; margin-top: 0.5rem; }

/* --- Layout Grid --- */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}
section { padding: 100px 0; position: relative; z-index: 2; }

/* Ambient Background elements */
.ambient-glow {
  position: fixed; border-radius: 50%; filter: blur(120px); z-index: 0; pointer-events: none; opacity: 0.6;
}
.glow-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: var(--accent); }
.glow-2 { bottom: -20%; right: -10%; width: 40vw; height: 40vw; background: rgba(87, 87, 255, 0.3); }

/* --- Components --- */
/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.8rem 1.8rem; font-weight: 600; border-radius: 100px; cursor: pointer;
  transition: var(--transition-smooth); font-family: var(--font-body);
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(87, 87, 255, 0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 25px var(--primary-glow); background: var(--primary-hover); }
.btn-highlight { background: var(--highlight); color: #000; box-shadow: 0 8px 20px var(--highlight-glow); }
.btn-highlight:hover { transform: translateY(-3px); box-shadow: 0 12px 25px var(--highlight-glow); background: #00f2ff; }
.btn-glass { background: rgba(255,255,255,0.1); backdrop-filter: blur(10px); color: #fff; border: 1px solid var(--border-light); }
.btn-glass:hover { background: rgba(255,255,255,0.2); transform: translateY(-3px); }
.btn-outline { border: 1px solid var(--primary); color: var(--text-main); }
.btn-outline:hover { background: var(--primary); box-shadow: 0 0 15px var(--primary-glow); }
.btn-block { width: 100%; }

/* Bento Card Style */
.bento-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
.bento-card::before {
  content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(255,255,255,0.05), transparent); pointer-events: none;
}
.bento-card:hover {
  transform: translateY(-8px);
  border-color: rgba(87,87,255,0.3);
  box-shadow: 0 20px 40px rgba(0,0,0,0.6), 0 0 20px rgba(87,87,255,0.1);
}

/* --- Sections --- */

/* Header */
.header {
  position: fixed; width: 100%; top: 0; z-index: 1000; padding: 1.5rem 0; transition: var(--transition-smooth);
}
.header.scrolled {
  padding: 1rem 0; background: rgba(5, 5, 20, 0.7); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border-light);
}
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo img { height: 36px; }
.nav-links { display: flex; gap: 2.5rem; align-items: center; }
.nav-link { color: var(--text-main); font-weight: 500; font-size: 0.95rem; opacity: 0.8; transition: opacity 0.3s; }
.nav-link:hover, .nav-link.active { opacity: 1; color: var(--primary); }
.mobile-toggle { display: none; background: none; border: none; color: #fff; font-size: 2rem; cursor: pointer; }

/* Hero */
.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 100px; }
.hero-container { display: flex; align-items: center; justify-content: space-between; gap: 4rem; }
.hero-content { flex: 1; z-index: 2;}
.badge { display: inline-block; padding: 0.3rem 1rem; border-radius: 100px; background: rgba(0, 229, 255, 0.1); color: var(--highlight); border: 1px solid rgba(0, 229, 255, 0.3); font-size: 0.85rem; font-weight: 600; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 1px; }
.hero-actions { display: flex; gap: 1rem; }
.hero-graphic { flex: 1; display: flex; justify-content: center; }
.graphic-wrapper { position: relative; }
.floating-img { animation: float 6s ease-in-out infinite; max-width: 90%; margin: 0 auto; filter: drop-shadow(0 20px 30px rgba(2,0,218,0.4)); }

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0px); }
}

/* About */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.lead { font-size: 1.2rem; font-weight: 500; color: #fff; margin-bottom: 1.5rem; }
.about-text p { color: var(--text-muted); margin-bottom: 2rem; }
.stats { display: flex; gap: 2rem; border-top: 1px solid var(--border-light); padding-top: 2rem; }
.stat-num { font-size: 2.5rem; color: var(--primary); font-family: var(--font-mono); line-height: 1; }
.stat-label { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

.skill-list { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 2rem; }
.skill-info { display: flex; justify-content: space-between; margin-bottom: 0.5rem; font-weight: 500; }
.skill-bar { height: 6px; background: var(--bg-color); border-radius: 100px; overflow: hidden; }
.skill-progress { height: 100%; background: linear-gradient(90deg, var(--accent), var(--primary)); border-radius: 100px; }

/* Services (Bento Grid) */
.services-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(280px, auto);
  gap: 1.5rem;
}
.icon-wrapper { width: 60px; height: 60px; border-radius: 16px; background: var(--bg-glass); display: flex; align-items: center; justify-content: center; font-size: 2rem; color: #fff; margin-bottom: 1.5rem; border: 1px solid var(--border-light); }
.icon-wrapper.primary { background: linear-gradient(135deg, var(--primary), var(--accent)); border: none; }
.services-bento h4 { font-size: 1.4rem; margin-bottom: 1rem; }
.services-bento p { color: var(--text-muted); margin-bottom: 1.5rem; }
.arrow-link { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 600; font-size: 0.95rem; }
.arrow-link i { font-size: 1.2rem; transition: transform var(--transition-fast); }
.arrow-link:hover i { transform: translateX(5px); }
.accent-link { color: inherit; }
.accent-link:hover { color: var(--primary); }

/* Portfolio */
.portfolio-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 2rem; }
.portfolio-item { background: var(--bg-surface); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-light); transition: var(--transition-smooth); }
.portfolio-item:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0,0,0,0.5); border-color: rgba(87,87,255,0.3); }
.item-visual { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.item-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1); }
.portfolio-item:hover .item-visual img { transform: scale(1.05); }
.item-overlay { position: absolute; inset: 0; background: rgba(5,5,20,0.8); display: flex; align-items: center; justify-content: center; opacity: 0; transition: var(--transition-smooth); backdrop-filter: blur(4px); }
.portfolio-item:hover .item-overlay { opacity: 1; }
.view-btn { background: #fff; color: #000; padding: 0.6rem 1.2rem; border-radius: 100px; font-weight: 600; display: flex; align-items: center; gap: 0.5rem; transform: translateY(20px); transition: var(--transition-bounce); }
.portfolio-item:hover .view-btn { transform: translateY(0); }
.item-content { padding: 1.5rem; }
.category-tag { display: inline-block; font-size: 0.75rem; text-transform: uppercase; font-family: var(--font-mono); color: var(--primary); margin-bottom: 0.5rem; letter-spacing: 1px; }
.item-content h4 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.item-content p { font-size: 0.95rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* Contact */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.5fr; gap: 0; padding: 0; overflow: hidden; }
.contact-info { background: linear-gradient(135deg, var(--bg-surface), #0f113a); padding: 3rem; border-right: 1px solid var(--border-light); }
.cf-header h4 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.cf-header p { color: var(--text-muted); margin-bottom: 3rem; }
.info-blocks { display: flex; flex-direction: column; gap: 2rem; }
.info-item { display: flex; gap: 1rem; align-items: flex-start; }
.info-item i { font-size: 1.5rem; color: var(--primary); background: rgba(87,87,255,0.1); padding: 0.8rem; border-radius: 50%; }
.info-item h5 { font-size: 1rem; margin-bottom: 0.2rem; }
.info-item p { font-size: 0.9rem; color: var(--text-muted); }

.contact-form-container { padding: 3rem; }
.form-group-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; font-weight: 500; color: var(--text-muted); }
.form-group input, .form-group textarea {
  width: 100%; background: var(--bg-color); border: 1px solid var(--border-light); border-radius: 8px;
  padding: 1rem; color: #fff; font-family: var(--font-body); font-size: 1rem; transition: var(--transition-fast);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 3px rgba(87,87,255,0.15); }
.form-status { margin-bottom: 1.5rem; font-weight: 500; font-size: 0.95rem; display: none; padding: 1rem; border-radius: 8px; }
.form-status.success { display: block; background: rgba(46, 213, 115, 0.1); color: #2ed573; border: 1px solid rgba(46, 213, 115, 0.2); }
.form-status.error { display: block; background: rgba(255, 71, 87, 0.1); color: #ff4757; border: 1px solid rgba(255, 71, 87, 0.2); }

/* Footer */
.footer { background: var(--bg-surface); padding-top: 4rem; border-top: 1px solid var(--border-light); margin-top: 4rem; }
.footer-container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 4rem; margin-bottom: 3rem; }
.footer-logo { height: 40px; margin-bottom: 1.5rem; }
.footer-brand p { color: var(--text-muted); margin-bottom: 1.5rem; max-width: 300px; }
.social-links { display: flex; gap: 1rem; }
.social-links a { display: flex; justify-content: center; align-items: center; width: 40px; height: 40px; background: var(--bg-color); border-radius: 50%; color: var(--text-main); border: 1px solid var(--border-light); }
.social-links a:hover { background: var(--primary); border-color: var(--primary); transform: translateY(-3px); }
.footer-links h4 { font-size: 1.1rem; margin-bottom: 1.5rem; font-family: var(--font-body); }
.footer-links ul { display: flex; flex-direction: column; gap: 0.8rem; }
.footer-links a { color: var(--text-muted); }
.footer-links a:hover { color: var(--primary); padding-left: 5px; }
.footer-bottom { border-top: 1px solid var(--border-light); padding: 1.5rem 0; display: flex; justify-content: space-between; color: var(--text-muted); font-size: 0.9rem; }

/* --- Reveal Animations --- */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.slide-right { transform: translateX(50px); }
.reveal.active { opacity: 1; transform: translate(0, 0); }

/* --- Responsive Layout --- */
@media (max-width: 992px) {
  .hero-container { flex-direction: column; text-align: center; padding-top: 40px; }
  .hero-subtitle { margin: 1.5rem auto 2.5rem; }
  .hero-actions { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .services-bento { grid-template-columns: 1fr 1fr; }
  .bento-card[style*="column: span 2"] { grid-column: span 2 !important; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; position: relative; z-index: 1001; }
  .navbar { position: absolute; }
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 300px; height: 100vh; background: var(--bg-surface);
    flex-direction: column; justify-content: center; border-left: 1px solid var(--border-light);
    transition: var(--transition-smooth); gap: 2rem;
  }
  .nav-links.nav-open { right: 0; box-shadow: -20px 0 50px rgba(0,0,0,0.5); }
  .outline-text { font-size: 2.5rem; top: -30%; }
  .services-bento { grid-template-columns: 1fr; }
  .bento-card[style*="column: span"] { grid-column: span 1 !important; }
  .form-group-row { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

/* --- Portfolio Details Layout --- */
.portfolio-details { padding-top: 150px; }
.breadcrumbs { margin-bottom: 2rem; }
.back-link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--text-muted); font-size: 0.95rem; font-weight: 500; margin-bottom: 1rem; }
.back-link:hover { color: var(--highlight); transform: translateX(-5px); }
.project-title { font-size: clamp(2rem, 4vw, 3rem); font-family: var(--font-heading); color: #fff; margin-bottom: 2rem; }

.portfolio-grid-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* CSS Scroll-Snap Gallery */
.gallery-wrapper {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background: var(--bg-surface);
  gap: 0;
}

.gallery-wrapper::-webkit-scrollbar {
  height: 8px;
}
.gallery-wrapper::-webkit-scrollbar-track {
  background: var(--bg-surface);
  border-radius: 10px;
}
.gallery-wrapper::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 10px;
}

.gallery-item {
  flex: 0 0 100%;
  width: 100%;
  height: auto;
  max-height: 60vh;
  object-fit: contain;
  scroll-snap-align: start;
  background: var(--bg-color);
}

.gallery-hint {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.5; }
  50% { opacity: 1; color: var(--highlight); }
  100% { opacity: 0.5; }
}

/* Info Column */
.info-column {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.info-list li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--border-light);
}
.info-list li:last-child { border-bottom: none; padding-bottom: 0; }

.info-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.info-label i { color: var(--highlight); font-size: 1.1rem; }
.info-value { font-weight: 500; font-size: 1.05rem; }

.project-description h3 { margin-bottom: 1.5rem; font-size: 1.5rem; }
.project-description p { color: var(--text-muted); font-size: 1rem; line-height: 1.8; }

@media (max-width: 992px) {
  .portfolio-grid-layout { grid-template-columns: 1fr; }
}