/*Variables */
/* :root {
  --color-bg: black;
  --color-text: #b9b5b5;
  --color-primary: #4fd1c5;
  --color-white: white;
} */
:root {
  --color-bg: #0b0f14;
  --color-surface: #131a22;
  --color-surface-2: #1b2530;
  --color-border: #2a3644;
  --color-text: #c9d3dd;
  --color-heading: #ffffff;
  --color-primary: #4fd1c5;
  --color-on-primary: #0b0f14;
}

[data-theme="light"] {
  --color-bg: #f6f8fa;
  --color-surface: #ffffff;
  --color-surface-2: #eaf0f5;
  --color-border: #d3dce5;
  --color-text: #3b4856;
  --color-heading: #0b1620;
  --color-primary: #0f9d8f;
  --color-on-primary: #ffffff;
}
/* Reset and base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-padding-top: 4rem;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: "DM Sans", system-ui, sans-serif;
  line-height: 1.7;
}

a {
  text-decoration: none;
}

/* Visible outline for keyboard users */
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

p {
  max-width: 620px;
}

h1 {
  font-weight: bold;
  font-size: clamp(2.5rem, 9vw, 4rem);
  color: var(--color-text);
  font-family: "Space Grotesk", system-ui, sans-serif;
}

h2 {
  font-family: "Space Grotesk", system-ui, sans-serif;
  color:var(--color-heading);
}

h3 {
  color: var(--color-heading);
  padding: 0.5rem 0.5rem;
}

/*Header and nav */
header {
  position: sticky;
  top: 0;
  z-index: 200;
  background-color: var(--color-primary);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

nav a {
  color: var(--color-on-primary);
  transition: transform 0.2s;
}

nav a:hover {
  opacity: 0.7;
  transform: scale(1.1);
}

.logo {
  background-color: rgb(65, 61, 61);
  color: white;
  padding: 0.05rem 0.25rem;
  font-weight: bold;
  letter-spacing: 2px;
}

.links {
  display: flex;
  gap: 1.5rem;
}

/*Sections */
section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

section + section {
  position: relative;
}

/* short line at the top of each section */
section + section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.5rem;
  width: min(820px, calc(100% - 3rem));
  height: 1px;
  background: var(--color-primary);
}

/*Hero*/
#home {
  display: flex;
  min-height: 80vh;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}

.q1 {
  color: var(--color-primary);
  font-size: 20px;
}

.q2 {
  font-size: clamp(1.25rem, 4.5vw, 1.875rem);
}

.hometab {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  background-color: var(--color-surface-2);
  color: var(--color-text);
  padding: 0.5rem 1.2rem;
  border: 2px solid var(--color-border);
  border-radius: 999px;
  font-size: 20px;
  transition: transform 0.2s;
}

.btn:hover {
  background-color: rgb(122, 117, 139);
  transform: scale(1.05);
}

/*  About */
.ab {
  font-size: 20px;
  margin-top: 20px;
  color: var(--color-text);
}

/* Skills and tags  */
.skills {
  margin-bottom: 10px;
  max-width: 620px;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.tag {
  background-color: var(--color-surface-2);
  color: var(--color-text);
  margin-top: 10px;
  padding: 0.5rem 1.05rem;
  border: 2px solid var(--color-border);
  border-radius: 999px;
  transition: transform 0.2s;
}

.tag:hover {
  background-color: rgb(122, 117, 139);
  transform: scale(1.05);
}

/*Projects*/
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(400px, 100%), 1fr));
  max-width: 820px;
  gap: 1rem;
}

.card {
  background-color: var(--color-surface);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 30px;
  padding: 0.75rem;
  border: 2px solid var(--color-border);
  max-width: 380px;
  border-radius: 8px;
}

.card .tag {
  padding: 0.25rem 0.8rem;
  font-size: 0.85rem;
  margin-top: 0;
}

.projtab {
  max-width: 390px;
  padding: 0.5rem 0.5rem;
}

.card-links {
  display: flex;
  margin-top: auto;
  padding:0.75rem;
  gap: 1.5rem;
}

.card-links a {
  color: var(--color-text);
  text-decoration: underline;
}

.card-links a:hover {
  opacity: 0.7;
}

/*Contact*/
#contact a {
  color: var(--color-primary);
  text-decoration: underline;
}

#contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 20px;
}

/* Footer */
footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--color-primary);
  text-align: center;
  font-size: 0.9rem;
}
footer p {
  margin: 0 auto;
}

/* Phones*/
@media (max-width: 600px) {
  nav {
    padding: 0.75rem 1.25rem;
  }

  .links {
    gap: 1rem;
    font-size: 0.9rem;
  }

  section {
    padding: 3rem 1.25rem;
  }

  section + section::before {
    left: 1.25rem;
    width: calc(100% - 2.5rem);
  }
  #home{
    min-height:auto;
  }
  .btn {
    font-size: 1rem;
  }

  .ab {
    font-size: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

/* toggle dark/light mode */
#toggle{
  width:2rem;
  height: 2rem;
  font-size: 1.25rem;
  background-color: var(--color-primary);
  border: none;
  color: var(--color-on-primary);
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.rail {
  position: fixed;
  right: 5.5rem;
  top: 15vh;
  height: 70vh;
  width: 2px;
  background-color: var(--color-border);
  pointer-events: none;
}

.stickman {
  position: absolute;
  left: 0;
  top: 0;
  width: 100px;
  height: 200px;
  color: var(--color-primary);
  transform: translate(-100%, var(--y, 0px));
}

@media (max-width: 1000px) {
  .rail { display: none; }
}