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

/* === Reset default spacing and box-sizing for consistency across browsers === */
* {
  margin: 0;                /* Remove default margin */
  padding: 0;               /* Remove default padding */
  box-sizing: border-box;   /* Include border and padding in element's total width/height */
}

/* === Base body styles: background, font, and text color for the whole page === */
body {
  background: linear-gradient(to bottom, #f0f4f8, #dbeafe); /* Subtle blue gradient background */
  font-family: 'Poppins', 'Segoe UI', sans-serif;           /* Modern, clean font */
  color: #1e293b;                                           /* Deep blue-gray text color */
  line-height: 1.6;                                         /* Comfortable line spacing */
  min-height: 100vh;                                        /* Ensure body fills viewport */
}

/* === MODERN GLASSY NAVIGATION BAR === */
.main-nav {
  position: sticky;                /* Sticks nav to top on scroll */
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(30, 58, 138, 0.85); /* Semi-transparent blue */
  backdrop-filter: blur(8px);          /* Glass effect */
  box-shadow: 0 4px 24px rgba(30, 58, 138, 0.10); /* Soft shadow */
  border-radius: 0 0 18px 18px;       /* Rounded bottom corners */
  margin-bottom: 0;
}

/* === Navigation list: horizontal on desktop === */
.navbar {
  list-style: none;         /* Remove default list bullets */
  display: flex;            /* Horizontal layout */
  justify-content: center;  /* Center items */
  align-items: center;
  gap: 36px;                /* Space between links */
  margin: 0;
  padding: 0;
  min-height: 64px;
  transition: all 0.3s;
}

/* === Navigation list item === */
.navbar li {
  position: relative;
}

/* === Navigation links: style and hover/focus effects === */
.navbar li a {
  color: #f1f5fa;           /* Light text */
  text-decoration: none;    /* No underline */
  font-weight: 600;
  font-size: 1.08rem;
  padding: 10px 22px;
  border-radius: 8px;
  transition: background 0.18s, color 0.18s, box-shadow 0.18s, transform 0.18s;
  letter-spacing: 0.5px;
  position: relative;
  z-index: 1;
}

/* === Navigation link hover/focus/active: highlight and animate === */
.navbar li a:hover,
.navbar li a:focus {
  background: linear-gradient(90deg, #3b82f6 60%, #1e40af 100%); /* Blue gradient on hover */
  color: #fff;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.18);              /* Soft shadow on hover */
  transform: translateY(-2px) scale(1.06);                       /* Slight lift and scale */
  outline: none;
}

.navbar li a:active {
  background: #1e40af;      /* Solid blue on click */
  color: #fff;
}

/* === Hamburger menu input: hidden by default === */
.nav-toggle {
  display: none;
}

/* === Hamburger icon label: hidden on desktop, shown on mobile === */
.nav-toggle-label {
  display: none;
  position: absolute;
  right: 24px;
  top: 18px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  cursor: pointer;
  z-index: 200;
}

/* === Hamburger icon bars === */
.nav-toggle-label span {
  display: block;
  width: 28px;
  height: 4px;
  margin: 4px 0;
  background: #f1f5fa;      /* Light bar color */
  border-radius: 2px;
  transition: all 0.3s;
}

/* === Page Title Block: big, bold, and centered === */
.page-title {
  background: #1e3a8a;      /* Deep blue background */
  padding: 32px 20px 24px 20px;
  text-align: center;
  color: white;
  box-shadow: 0 2px 12px rgba(30, 58, 138, 0.10); /* Soft shadow */
  letter-spacing: 1px;
}

.page-title h1 {
  font-size: 2.5rem;        /* Large title */
  font-weight: 700;
  margin: 0;
  letter-spacing: 1.5px;
}

/* === .container: Centers content and limits its width === */
.container {
  max-width: 1200px;        /* Maximum width of content */
  margin: auto;             /* Center horizontally */
  padding: 20px;
}

/* === header.hero: Top hero section with image and intro === */
header.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px 40px 20px;
  background: linear-gradient(120deg, #f1f5f9 60%, #dbeafe 100%); /* Subtle gradient */
  border-bottom: none;
  text-align: center;
  box-shadow: 0 4px 24px rgba(30, 58, 138, 0.08); /* Soft shadow */
  border-radius: 0 0 24px 24px;
  margin-bottom: 24px;
}

/* === .hero-img: Profile image styling === */
.hero-img {
  width: 170px;
  height: 170px;
  border-radius: 50%;        /* Makes image circular */
  object-fit: cover;
  border: 5px solid #3b82f6; /* Blue border */
  margin-bottom: 24px;
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.10); /* Soft shadow */
}

/* === .hero-right h1: Name in hero section === */
.hero-right h1 {
  font-size: 2.3rem;
  color: #1e3a8a;            /* Deep blue */
  font-weight: 700;
  margin-bottom: 10px;
}

/* === .hero-right p: Intro text in hero section === */
.hero-right p {
  font-size: 1.15rem;
  color: #334155;            /* Muted blue-gray */
  max-width: 600px;
  margin: 0 auto;
}

/* === .section: Card-like sections for main content === */
.section {
  background: #fff;
  margin: 48px auto;
  padding: 40px 32px;
  border-radius: 18px;
  box-shadow: 0 8px 32px rgba(30, 58, 138, 0.10); /* Soft shadow */
  max-width: 900px;
  transition: box-shadow 0.3s;
}

.section:hover {
  box-shadow: 0 12px 40px rgba(30, 58, 138, 0.16); /* Stronger shadow on hover */
}

/* === .section h2: Section headings === */
.section h2 {
  color: #1e40af;            /* Blue heading */
  margin-bottom: 18px;
  font-size: 2rem;
  border-left: 6px solid #3b82f6; /* Blue bar to the left */
  padding-left: 14px;
  font-weight: 600;
  letter-spacing: 1px;
}

/* === .section p, .section li: Paragraphs and list items === */
.section p,
.section li {
  font-size: 1.08rem;
  color: #1f2937;
  margin-bottom: 10px;
}

/* === .skills: Stylish skill badges === */
.skills {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-top: 12px;
}

.skills li {
  background: linear-gradient(90deg, #3b82f6 60%, #1e40af 100%); /* Blue gradient badge */
  color: white;
  padding: 10px 20px;
  border-radius: 22px;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.10); /* Soft shadow */
  letter-spacing: 0.5px;
}

/* === .btn, button[type="submit"], .project-btn: Modern buttons === */
.btn,
button[type="submit"],
.project-btn {
  background: linear-gradient(90deg, #2563eb 60%, #1e40af 100%); /* Blue gradient */
  color: #fff !important;
  padding: 12px 22px;
  border: none;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  display: inline-block;
  margin-top: 12px;
  box-shadow: 0 2px 8px rgba(30, 58, 138, 0.10); /* Soft shadow */
  font-size: 1rem;
}

.btn:hover,
button[type="submit"]:hover,
.project-btn:hover {
  background: #1e40af;       /* Darker blue on hover */
  transform: translateY(-2px) scale(1.03); /* Slight lift and scale */
}

/* === Project Cards: Each project in its own card === */
.project {
  background: #f8fafc;
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(30, 58, 138, 0.07); /* Soft shadow */
  padding: 24px 20px;
  margin-bottom: 28px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.project:hover {
  box-shadow: 0 6px 24px rgba(30, 58, 138, 0.13); /* Stronger shadow on hover */
  transform: translateY(-4px) scale(1.02);
}

/* === form: Stylish contact form === */
form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 20px;
}

input,
textarea {
  padding: 14px;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  font-size: 1rem;
  background: #f8fafc;
  transition: border 0.2s;
}

input:focus,
textarea:focus {
  border: 1.5px solid #3b82f6; /* Blue border on focus */
  outline: none;
}

/* === .socials: Social/contact links === */
.socials {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
  align-items: flex-start;
}

.socials a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #1e3a8a;
  text-decoration: none;
  font-weight: 500;
  font-size: 1.08rem;
  transition: color 0.2s;
}

.socials a i {
  color: #3b82f6;
  font-size: 1.2em;
}

.socials a:hover {
  color: #2563eb; /* Brighter blue on hover */
}

/* === footer: Polished footer === */
footer {
  background: #1e3a8a;
  color: #f8fafc;
  text-align: center;
  padding: 28px 10px 18px 10px;
  margin-top: 60px;
  font-size: 1rem;
  border-radius: 18px 18px 0 0;
  box-shadow: 0 -2px 12px rgba(30, 58, 138, 0.08);
}

/* === Responsive Improvements: layout and nav for mobile === */
@media (min-width: 700px) {
  header.hero {
    flex-direction: row; /* Side-by-side on desktop */
    justify-content: center;
    gap: 48px;
    text-align: left;
  }
  .hero-right {
    flex: 1;
    text-align: left;
  }
  .section {
    padding: 48px 56px;
  }
  .skills {
    justify-content: flex-start;
  }
  .socials {
    align-items: flex-end;
  }
}

/* === Responsive: collapse nav to hamburger on small screens === */
@media (max-width: 900px) {
  .navbar {
    flex-direction: column; /* Stack nav links vertically */
    align-items: flex-start;
    background: rgba(30, 58, 138, 0.97);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    padding: 24px 0 16px 0;
    gap: 0;
    border-radius: 0 0 18px 18px;
    box-shadow: 0 8px 32px rgba(30, 58, 138, 0.13);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s;
  }
  .navbar li {
    width: 100%;
    text-align: left;
    margin: 0;
  }
  .navbar li a {
    display: block;
    width: 100%;
    padding: 16px 32px;
    font-size: 1.1rem;
    border-radius: 0;
    border-left: 4px solid transparent;
    transition: background 0.18s, color 0.18s, border 0.18s;
  }
  .navbar li a:hover,
  .navbar li a:focus {
    background: #3b82f6;
    color: #fff;
    border-left: 4px solid #1e40af;
    transform: none;
  }
  .nav-toggle {
    display: block;
    position: absolute;
    right: 24px;
    top: 18px;
    width: 36px;
    height: 36px;
    opacity: 0;
    z-index: 201;
  }
  .nav-toggle-label {
    display: flex;
  }
  .main-nav {
    position: relative;
  }
  .nav-toggle:checked ~ .navbar {
    max-height: 500px;
    transition: max-height 0.4s;
  }
  /* Hamburger animation: turns into X when open */
  .nav-toggle:checked + .nav-toggle-label span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle:checked + .nav-toggle-label span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* === Extra spacing below nav for mobile === */
@media (max-width: 900px) {
  .page-title {
    padding-bottom: 12px;
  }
}