/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;700&display=swap');

:root {
  /* Dark Theme (Default) */
  --bg-color: #0c0c0c;
  --surface-color: rgba(22, 22, 22, 0.8);
  --surface-hover: rgba(31, 31, 31, 0.9);
  --text-primary: #ededed;
  --text-secondary: #a1a1a1;
  --accent-color: #00e5ff;
  --accent-hover: #00b8cc;
  --border-color: #333;
  --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  --modal-bg: rgba(0, 0, 0, 0.85);

  --transition-speed: 0.3s;
}

[data-theme="light"] {
  --bg-color: #f8f9fa;
  --surface-color: rgba(255, 255, 255, 0.9);
  --surface-hover: rgba(241, 243, 245, 0.95);
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --accent-color: #007bff;
  --accent-hover: #0056b3;
  --border-color: #dee2e6;
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --modal-bg: rgba(255, 255, 255, 0.9);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-speed), color var(--transition-speed);
  overflow-x: hidden;
  /* Prevent horizontal scroll */
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

a {
  text-decoration: none;
  color: var(--accent-color);
  transition: color var(--transition-speed);
}

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

/* Canvas Background */
#canvas-network {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  /* Let clicks pass through */
  z-index: 0;
  opacity: 0.3;
}

/* LAYOUT GRID */
.layout-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  /* Mobile default */
  min-height: 100vh;
}

/* SIDEBAR (Sticky) */
.sidebar {
  padding: 4rem 2rem;
  background: transparent;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.sidebar-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 500px;
}

.hero-img-container {
  margin-bottom: 2rem;
}

.hero-img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent-color);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
}

.sidebar h1 {
  font-size: 3rem;
  background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sidebar h2 {
  font-size: 1.5rem;
  color: var(--accent-color);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.btn {
  padding: 0.8rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
  cursor: pointer;
}

.primary-btn {
  background: var(--accent-color);
  color: #000;
  border: 2px solid var(--accent-color);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 229, 255, 0.2);
  color: #000;
}

[data-theme="light"] .primary-btn {
  color: #fff;
}

[data-theme="light"] .primary-btn:hover {
  color: #fff;
}

.secondary-btn {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-secondary);
}

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

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.social-links a {
  color: var(--text-secondary);
}

.social-links a:hover {
  color: var(--accent-color);
  transform: scale(1.1);
}

.sidebar-footer p {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* Theme Toggle (Top Left/Right absolute) */
.theme-toggle-container {
  position: absolute;
  top: 2rem;
  right: 2rem;
}

.theme-toggle {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  cursor: pointer;
  color: var(--text-primary);
  padding: 0.5rem;
  border-radius: 50%;
  width: 40px;
  height: 40px;
}

/* MAIN CONTENT (Scrollable) */
.main-content {
  padding: 4rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.scroll-section {
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s forwards;
}

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

.section-header {
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section-header h2 {
  font-size: 2rem;
  margin: 0;
  white-space: nowrap;
}

.section-header .line {
  height: 1px;
  background: var(--border-color);
  width: 100%;
}

/* Timeline Cards */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-item {
  cursor: pointer;
}

.content {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.card-hover:hover {
  transform: translateY(-5px) scale(1.02);
  border-color: var(--accent-color);
  box-shadow: var(--card-shadow);
}

.date {
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.9rem;
  display: block;
  margin-bottom: 0.5rem;
}

.summary {
  color: var(--text-secondary);
  margin: 1rem 0;
}

.read-more {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: border-color 0.3s;
  /* Tilt handled by JS/inline style */
  transform-style: preserve-3d;
}

.skill-card:hover {
  border-color: var(--accent-color);
}

.skill-title {
  display: flex;
  align-items: flex-end;
  /* Align icon bottom */
  gap: 0.8rem;
  margin-bottom: 1.5rem;
  transform: translateZ(20px);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  transform: translateZ(30px);
  /* 3D effect */
}

.tag {
  background: var(--surface-hover);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
}

/* Education Card */
.education-card {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

/* MODALS */
.modal {
  display: none;
  /* Hidden by default */
  position: fixed;
  z-index: 2000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: var(--modal-bg);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.modal-content {
  background-color: var(--bg-color);
  margin: 5% auto;
  padding: 3rem;
  border: 1px solid var(--accent-color);
  border-radius: 16px;
  width: 90%;
  max-width: 800px;
  position: relative;
  box-shadow: 0 0 50px rgba(0, 229, 255, 0.1);
}

.close-modal {
  color: var(--text-secondary);
  float: right;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
  transition: color 0.2s;
}

.close-modal:hover {
  color: var(--accent-color);
}

.modal-date {
  color: var(--accent-color);
  display: block;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.modal-body ul {
  list-style: none;
  /* remove default bullets */
}

.modal-body li {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  position: relative;
  color: var(--text-secondary);
}

.modal-body li::before {
  content: '▹';
  color: var(--accent-color);
  position: absolute;
  left: 0;
}

.modal-btn {
  margin-top: 2rem;
  width: fit-content;
}

/* Desktop Split Layout */
@media screen and (min-width: 992px) {
  .layout-wrapper {
    grid-template-columns: 40% 60%;
  }

  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    border-right: 1px solid var(--border-color);
    justify-content: flex-start;
    /* changed from center to allow scrolling from top */
    overflow-y: auto;
    /* Allow internal scrolling if content is too tall */
    padding-top: 4rem;
    /* keep consistent spacing */
  }

  .sidebar::-webkit-scrollbar {
    width: 0px;
    /* Hide scrollbar for cleaner look */
    background: transparent;
  }

  .main-content {
    padding: 6rem 4rem;
  }
}