/* === VAMSHI KRISHNA PORTFOLIO - FINAL BEAUTIFIED VERSION === */
/* Palette: #333333, #0e5a60, #513030, #6d5849, #ffffff */

:root {
  --dark: #333333;
  --teal: #0e5a60;
  --brown: #513030;
  --olive: #6d5849;
  --white: #ffffff;
  --bg-gradient: linear-gradient(135deg, #ffffff 0%, #e9eceb 100%);
  --maxw: 1000px;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* ==== GLOBAL ==== */
* {
  box-sizing: border-box;
}
html, body {
  height: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
  background: var(--bg-gradient);
  color: var(--dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==== CONTAINER ==== */
.container {
  width: 90%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 0;
}

/* ==== HEADER ==== */
.site-header {
  background: linear-gradient(90deg, var(--teal), var(--olive));
  border-bottom: 2px solid rgba(0,0,0,0.05);
  position: static; /* scrolls with the page */
  box-shadow: var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.brand h1 {
  margin: 0;
  font-size: 1.35rem;
  color: var(--white);
}
.brand .sub {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}
.avatar {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: var(--white);
  color: var(--teal);
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ==== NAVIGATION ==== */
.nav a {
  margin: 0 0.75rem;
  text-decoration: none;
  font-weight: 600;
  color: var(--white);
  transition: color 0.3s ease;
}
.nav a:hover {
  color: var(--brown);
}
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  color: var(--white);
  cursor: pointer;
}

/* ==== CARDS / SECTIONS ==== */
.card {
  background: var(--white);
  padding: 1.75rem;
  border-radius: 16px;
  margin: 1.75rem 0;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.3s ease;
  border-left: 6px solid var(--teal);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 35px rgba(14, 90, 96, 0.25);
}
.card h2 {
  margin-top: 0;
  color: var(--teal);
  font-size: 1.4rem;
  border-bottom: 2px solid var(--olive);
  display: inline-block;
  padding-bottom: 0.3rem;
}

/* ==== SKILLS / LAYOUT ==== */
.cols {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}
.cols > div {
  flex: 1;
  min-width: 220px;
}
.cols h3 {
  color: var(--brown);
  margin-bottom: 0.4rem;
}
ul {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
}
ul li {
  margin: 0.3rem 0;
  color: var(--dark);
}

/* ==== QUICK INFO ==== */
.quick-info {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.quick-info li {
  background: var(--teal);
  color: var(--white);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  font-weight: 500;
  box-shadow: 0 4px 10px rgba(14, 90, 96, 0.2);
}

.quick-info li a {
  color: white;
  text-decoration: none;
}

.quick-info a:hover {
  color: var(--brown);
  text-decoration: underline;
}
/* ==== CONTACT ==== */
.contact-list {
  list-style: none;
  padding: 0;
}
.contact-list li {
  margin: 0.4rem 0;
}
.contact-list a {
  color: var(--teal);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}
.contact-list a:hover {
  color: var(--brown);
  text-decoration: underline;
}

/* ==== FOOTER ==== */
.site-footer {
  text-align: center;
  padding: 1rem 0;
  background: var(--dark);
  color: var(--white);
  font-size: 0.9rem;
  letter-spacing: 0.5px;
  margin-top: 3rem;
  box-shadow: inset 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* ==== BUTTON EFFECTS / TRANSITIONS ==== */
button, a {
  transition: all 0.3s ease;
}

/* ==== RESPONSIVE ==== */
@media (max-width: 800px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    right: 1rem;
    background: var(--white);
    border: 2px solid var(--teal);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 0.5rem;
  }
  .nav a {
    display: block;
    color: var(--dark);
    padding: 0.6rem 1rem;
  }
  .nav-toggle {
    display: block;
  }
}