/* ===== Global Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Poppins", "Segoe UI", Tahoma, sans-serif;
  color: #2b2b2b;
  line-height: 1.6;
  background-color: #f4f6f8;
  scroll-behavior: smooth;
  transition: background 0.4s ease, color 0.4s ease;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 0;
}

/* ===== Header ===== */
header {
  background: #0f172a;
  color: #fff;
  padding: 15px 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.8em;
  font-weight: 600;
  letter-spacing: 1px;
  color: #38bdf8;
}

nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #38bdf8;
}

/* ===== Theme Toggle Button ===== */
.theme-toggle {
  background: #1e293b;
  border: 1px solid #334155;
  font-size: 1.2em;
  color: #38bdf8;
  cursor: pointer;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 15px;
  transition: background 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  background: #334155;
  transform: rotate(20deg);
}

/* ===== Active Nav Link ===== */
nav a.active {
  color: #38bdf8;
  border-bottom: 2px solid #38bdf8;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
  text-align: center;
}

.section h2 {
  margin-bottom: 20px;
  font-size: 2.2em;
  color: #0f172a;
  position: relative;
}

.section h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: #38bdf8;
  margin: 10px auto 0;
  border-radius: 2px;
}

#about p {
  max-width: 700px;
  margin: 20px auto 0;
  font-size: 1.1em;
  color: #475569;
}

/* ===== Projects Grid ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.project-card {
  background: #ffffff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.4s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

/* ===== Education Grid ===== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 25px;
}

.edu-card {
  background: #ffffff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

/* ===== Skills Grid ===== */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin-top: 35px;
}

.skill-card {
  background: #ffffff;
  border: 2px solid #38bdf8;
  color: #0f172a;
  font-weight: 500;
  padding: 15px 25px;
  border-radius: 10px;
  min-width: 120px;
  text-align: center;
  transition: all 0.25s ease;
}

.skill-card:hover {
  background: #38bdf8;
  color: #fff;
  transform: scale(1.05);
}

/* ===== Awards ===== */
.awards-list {
  list-style: none;
  max-width: 700px;
  margin: 25px auto;
  text-align: left;
  line-height: 1.8;
}

.awards-list li::before {
  content: "• ";
  color: #38bdf8;
  font-weight: bold;
}

/* ===== Buttons ===== */
.contact-btn,
.live-btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #38bdf8;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background 0.3s ease, transform 0.2s ease;
}

.contact-btn:hover,
.live-btn:hover {
  background: #0284c7;
  transform: translateY(-3px);
}

/* ===== Footer ===== */
footer {
  background: #0f172a;
  color: #cbd5e1;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9em;
}

/* ===== Responsive Menu Toggle ===== */
.menu-toggle {
  display: none;
  font-size: 1.8em;
  cursor: pointer;
  color: #38bdf8;
}

@media (max-width: 768px) {
  nav ul {
    display: none;
    flex-direction: column;
    width: 100%;
    background: #0f172a;
    text-align: center;
  }

  nav ul.show {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .section {
    padding: 50px 0;
  }
}

/* ===== Scroll Fade-in Animation ===== */
.section,
.project-card,
.edu-card,
.skill-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== Back to Top Button ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: #38bdf8;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  font-size: 1.4em;
  cursor: pointer;
  display: none;
  transition: background 0.3s ease, transform 0.3s ease;
  z-index: 1000;
}

.back-to-top:hover {
  background: #0284c7;
  transform: translateY(-3px);
}

/* ===== Dark Mode ===== */
/* ===== Dark Mode ===== */
.dark-mode {
  background-color: #0b1120; /* darker base for strong contrast */
  color: #e2e8f0;
}

/* Header & Footer */
.dark-mode header {
  background: #020617;
  color: #e2e8f0;
}

.dark-mode footer {
  background: #020617;
  color: #94a3b8;
  border-top: 1px solid #1e293b;
}

/* Cards (Project, Education, Skills) */
.dark-mode .project-card,
.dark-mode .edu-card,
.dark-mode .skill-card {
  background: #1e293b; /* lighter navy for contrast */
  color: #f1f5f9; /* nearly white text */
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.15); /* soft glow */
  border: 1px solid #334155;
  transition: all 0.3s ease;
}

.dark-mode .project-card:hover,
.dark-mode .edu-card:hover,
.dark-mode .skill-card:hover {
  background: #1e40af; /* bright hover accent */
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.25);
}

/* Section Headings */
.dark-mode .section h2 {
  color: #f8fafc;
}

.dark-mode .section h2::after {
  background: #38bdf8;
}

/* Paragraph Texts */
.dark-mode #about p {
  color: #cbd5e1;
}

/* Awards Section */
.dark-mode .awards-list {
  color: #e2e8f0;
  background: #1e293b;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.12);
}

.dark-mode .awards-list li::before {
  color: #38bdf8;
}

/* Navigation */
.dark-mode nav a {
  color: #e2e8f0;
}

.dark-mode nav a:hover {
  color: #38bdf8;
}

.dark-mode nav a.active {
  color: #38bdf8;
  border-bottom: 2px solid #38bdf8;
}

/* Theme Toggle Button */
.dark-mode .theme-toggle {
  background: #1e293b;
  color: #facc15; /* golden sun icon color */
  border-color: #475569;
}

.dark-mode .theme-toggle:hover {
  background: #334155;
  transform: rotate(25deg);
}