/* ============================================================
   style.css — D Lohit Reddy Portfolio
   ============================================================
   This file contains ALL styling for the portfolio.
   It is linked from index.html via:
     <link rel="stylesheet" href="style.css" />
   ============================================================ */

/* ----------------------------------------------------------
   CSS VARIABLES — Edit these to change the whole color theme
   ---------------------------------------------------------- */
:root {
  --cream:      #fdf6ec;   /* Main page background */
  --beige:      #f0e6d0;   /* Card and alternate section background */
  --beige-dark: #d9c9ae;   /* Borders and dividers */
  --brown:      #5c3d1e;   /* Dark headings */
  --brown-mid:  #8b5e3c;   /* Subheadings, links, accents */
  --text:       #6b5040;   /* Body paragraph text */
  --dark-bg:    #3b2510;   /* Contact section dark background */
  --white:      #ffffff;
}

/* ----------------------------------------------------------
   RESET — Remove default browser spacing
   ---------------------------------------------------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; } /* Smooth scrolling when nav links are clicked */

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--cream);
  color: var(--text);
  line-height: 1.7;
}

/* ----------------------------------------------------------
   NAVIGATION — Fixed bar at the top
   ---------------------------------------------------------- */
nav {
  position: fixed;          /* Stays visible as you scroll */
  top: 0; left: 0;
  width: 100%;
  background: rgba(253, 246, 236, 0.93);
  backdrop-filter: blur(8px);  /* Frosted glass blur effect */
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  border-bottom: 1px solid var(--beige-dark);
  z-index: 999;             /* Stays above all other content */
}

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.4rem;
  color: var(--brown);
  letter-spacing: 2px;
}

nav ul { list-style: none; display: flex; gap: 28px; }

nav a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s;   /* Smooth color change on hover */
}

nav a:hover { color: var(--brown-mid); }

/* ----------------------------------------------------------
   SECTION BASE — Shared styles for every section
   ---------------------------------------------------------- */
section {
  padding: 80px 20px;
  background: var(--cream);
}

/* Alternate light background for every other section */
section.light { background: var(--beige); }

/* Dark background for contact section */
section.dark  { background: var(--dark-bg); color: var(--white); text-align: center; }

/* Centers and limits width of content */
section > *:not(.grid3):not(.grid4):not(.two-col):not(.timeline):not(.contact-row) {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* Small uppercase label above each section title */
.label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--brown-mid);
  display: block;
  margin-bottom: 6px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

/* Section main heading */
h2 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.8rem, 3vw, 2.4rem); /* Responsive font size */
  color: var(--brown);
  margin-bottom: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

section.dark h2 { color: var(--white); }
section.dark .label { color: rgba(255,255,255,0.55); }

/* ----------------------------------------------------------
   HERO SECTION
   ---------------------------------------------------------- */
#home {
  min-height: 100vh;        /* Full screen height */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 80px;
  background: linear-gradient(160deg, #fdf6ec 0%, #f5e9d4 100%);
}

/* Small pill-shaped badge above name */
.badge {
  background: var(--beige);
  color: var(--brown-mid);
  border: 1px solid var(--beige-dark);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
}

/* Main name heading — em tag makes "Lohit" italic and golden */
#home h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  color: var(--brown);
  line-height: 1.1;
  margin-bottom: 16px;
}

#home h1 em { color: var(--brown-mid); font-style: italic; }

.sub { max-width: 500px; margin-bottom: 36px; font-size: 1rem; }

/* Row of two buttons */
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

.btn-solid, .btn-outline {
  padding: 11px 26px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s;
}

.btn-solid  { background: var(--brown-mid); color: var(--white); }
.btn-outline{ border: 2px solid var(--brown-mid); color: var(--brown-mid); }
.btn-solid:hover, .btn-outline:hover { transform: translateY(-2px); }

/* ----------------------------------------------------------
   ABOUT — Two column layout
   ---------------------------------------------------------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}

.about-text p { margin-bottom: 14px; }

/* 2x2 grid of stat boxes */
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.stat {
  background: var(--cream);
  border: 1px solid var(--beige-dark);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.stat span { font-family: 'Playfair Display', serif; font-size: 2rem; color: var(--brown); display: block; }
.stat small { font-size: 0.78rem; color: var(--text); }

/* ----------------------------------------------------------
   CARDS — Used for skills and certifications
   ---------------------------------------------------------- */
.grid3, .grid4 {
  display: grid;
  gap: 18px;
  max-width: 900px;
  margin: 0 auto;
}

.grid3 { grid-template-columns: repeat(3, 1fr); }
.grid4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--cream);
  border: 1px solid var(--beige-dark);
  border-radius: 10px;
  padding: 22px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(92,61,30,0.1); }

section.light .card { background: var(--white); }

.icon { font-size: 1.6rem; margin-bottom: 10px; }

.card h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brown);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 10px;
}

/* Pill-shaped tags inside cards */
.tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }

.tags span {
  background: var(--beige);
  color: var(--brown-mid);
  padding: 3px 9px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-weight: 500;
}

.issuer { font-size: 0.82rem; color: var(--brown-mid); font-weight: 500; margin-top: 6px; }
.yr     { font-size: 0.76rem; color: #aaa; margin-top: 2px; }

/* ----------------------------------------------------------
   PROJECT CARD
   ---------------------------------------------------------- */
.proj-card {
  background: var(--white);
  border: 1px solid var(--beige-dark);
  border-radius: 12px;
  padding: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.proj-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.proj-card h3 { font-family: 'Playfair Display', serif; font-size: 1.2rem; color: var(--brown); }

.date {
  background: var(--beige);
  color: var(--brown-mid);
  padding: 4px 13px;
  border-radius: 50px;
  font-size: 0.76rem;
  font-weight: 500;
  white-space: nowrap;
}

.proj-card p  { font-size: 0.93rem; margin-bottom: 14px; }
.proj-card ul { list-style: none; margin-bottom: 18px; }

.proj-card li {
  padding: 5px 0 5px 18px;
  font-size: 0.88rem;
  position: relative;
}

/* Custom arrow bullet */
.proj-card li::before { content: '▸'; color: var(--brown-mid); position: absolute; left: 0; }

/* ----------------------------------------------------------
   EDUCATION TIMELINE
   ---------------------------------------------------------- */
.timeline {
  position: relative;
  padding-left: 36px;
  max-width: 900px;
  margin: 0 auto;
}

/* The vertical line */
.timeline::before {
  content: '';
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--brown-mid), var(--beige-dark));
}

.tl-item { position: relative; margin-bottom: 32px; }

/* Circle dot on the line */
.dot {
  position: absolute;
  left: -32px; top: 8px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--brown-mid);
  border: 2px solid var(--cream);
  box-shadow: 0 0 0 2px var(--brown-mid);
}

.tl-card {
  background: var(--beige);
  border: 1px solid var(--beige-dark);
  border-radius: 10px;
  padding: 20px 24px;
}

.tl-card h3  { font-family: 'Playfair Display', serif; font-size: 1rem; color: var(--brown); margin-bottom: 4px; }
.deg         { font-size: 0.88rem; color: var(--brown-mid); font-weight: 500; margin-bottom: 2px; }

/* ----------------------------------------------------------
   CONTACT SECTION
   ---------------------------------------------------------- */
.contact-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.c-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  padding: 24px 32px;
  text-decoration: none;
  color: var(--white);
  min-width: 200px;
  transition: background 0.2s, transform 0.2s;
}

.c-card:hover { background: rgba(255,255,255,0.14); transform: translateY(-3px); }
.c-card .icon { font-size: 1.6rem; margin-bottom: 8px; }
.clabel { font-size: 0.72rem; letter-spacing: 1.5px; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 4px; }
.c-card p:last-child { font-size: 0.88rem; }

.footer { font-size: 0.78rem; color: rgba(255,255,255,0.35); border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; }

/* ----------------------------------------------------------
   RESPONSIVE — Adjustments for small/medium screens
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  .grid3 { grid-template-columns: 1fr 1fr; }  /* 2 columns on tablet */
  .grid4 { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
  .grid3, .grid4 { grid-template-columns: 1fr; } /* 1 column on phone */
  nav ul { display: none; }                        /* Hide nav links on small phone */
  nav { padding: 0 16px; }
}