/*
 Name : Julian Burnley
 Course: CIS233DA
 Section: 12988 
 Instructor : Brian Thurber
*/

/* -------------------------------------------------------
   FONT IMPORTS & ROOT VARIABLES
-------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@200;300;400;700&family=Lato:ital,wght@0,400;0,700;1,700&family=Roboto:ital,wght@0,100;0,400;0,700;1,100;1,400;1,700&display=swap');

:root {
  --main-color-100: hsl(70, 71%, 64%);
  --main-color-200: hsl(321, 20%, 58%);
  --main-color-400: hsl(92, 56%, 56%);
  --main-color-600: hsl(52, 31%, 49%);
  --main-color-800: hsl(11, 22%, 10%);

  --accent-color-200: hsl(191, 65%, 88%);
  --accent-color-400: hsl(190, 40%, 50%);
  --accent-color-600: hsl(141, 100%, 17%);
  --accent-color-800: hsl(191, 33%, 10%);

  --glass-bg: rgba(255, 255, 255, 0.18);
  --glass-border: rgba(255, 255, 255, 0.35);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);

  --font-body: "Lato", sans-serif;
  --font-headings: "Roboto", sans-serif;
  --font-code: "IBM Plex Mono", monospace;
}

/* -------------------------------------------------------
   DARK MODE VARIABLES
-------------------------------------------------------- */
body.dark-mode {
  --main-color-100: hsl(210, 15%, 12%);
  --main-color-200: hsl(210, 15%, 18%);
  --main-color-400: hsl(210, 15%, 22%);
  --main-color-600: hsl(210, 15%, 28%);
  --main-color-800: hsl(210, 15%, 92%);

  --accent-color-200: hsl(141, 25%, 25%);
  --accent-color-400: hsl(141, 35%, 35%);
  --accent-color-600: hsl(141, 45%, 45%);
  --accent-color-800: hsl(141, 55%, 85%);

  --glass-bg: rgba(20, 20, 30, 0.55);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-shadow: 0 12px 40px rgba(0, 0, 0, 0.7);
}

/* -------------------------------------------------------
   ACCESSIBILITY: REDUCE MOTION
-------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* -------------------------------------------------------
   RESET
-------------------------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* -------------------------------------------------------
   GLOBAL LAYOUT & SCROLL
-------------------------------------------------------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  height: 95vh;
  overflow-x: auto;
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  font-family: var(--font-body);
  background: radial-gradient(circle at top left, var(--main-color-100), var(--accent-color-200));
  color: var(--main-color-800);
}

/* -------------------------------------------------------
   GLASSMORPHISM BASE
-------------------------------------------------------- */
.glass {
  background: var(--glass-bg);
  border-radius: 1rem;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(16px);
}

/* -------------------------------------------------------
   LEFT SIDEBAR (Sticky + Glass)
-------------------------------------------------------- */
.left-side {
  position: sticky;
  left: 0;
  top: 0;
  height: 100vh;
  width: 24rem;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-right: 4px solid var(--accent-color-600);
}

.left-side.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 1rem;
}

#student-info p {
  padding: .5rem 0;
}

#student-info span {
  font-weight: 700;
}

/* -------------------------------------------------------
   NAVIGATION (Animated Tabs)
-------------------------------------------------------- */
#navbar {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

#navbar > li {
  list-style: none;
  margin-bottom: 0.75rem; 
  gap: 1rem; 
}

.child-links {
  display: none;
  flex-direction: column;
  margin-left: 1rem;
  gap: .35rem;
  list-style-type: none;
}

li.active > .child-links {
  display: flex;
}

nav a {
  position: relative;
  color: var(--accent-color-800);
  text-decoration: none;
  padding: .6rem .75rem;
  display: block;
  font-weight: 700;
  border-radius: .75rem;
  background-color: var(--accent-color-200);
  transition: background-color .25s ease, color .25s ease, transform .2s ease;
  overflow: hidden;
}

/* animated tab underline */
nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 3px;
  background: var(--accent-color-600);
  transition: width .25s ease;
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

nav a:hover {
  background-color: var(--accent-color-400);
  color: white;
  transform: translateY(-1px);
}

nav a.active {
  background-color: var(--accent-color-600);
  color: white;
}

.child-links a {
  font-size: .95rem;
  padding-left: 1.5rem;
}

/* -------------------------------------------------------
   FLOATING NAV BUTTON
-------------------------------------------------------- */
#floating-nav {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 999;
  padding: .75rem 1rem;
  border-radius: 999px;
  background: var(--accent-color-600);
  color: white;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(0,0,0,.4);
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
}

#floating-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 12px var(--accent-color-600);
  background: var(--accent-color-800);
}

/* -------------------------------------------------------
   HEADINGS
-------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
}

/* Rotated section headings */
.hor > h2 {
  position: absolute;
  left: 0;
  top: 0;
  transform: rotate(-90deg) translate(-100%, 0);
  transform-origin: top left;
  font-size: 2.5rem;
  text-transform: uppercase;
  color: var(--accent-color-600);
  letter-spacing: .1rem;
  opacity: .9;
  text-shadow: 2px 2px 4px rgba(0,0,0,.25);
}

/* -------------------------------------------------------
   MAIN CONTENT (Horizontal Panels + Fade-in)
-------------------------------------------------------- */
main {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
}

/* fade-in animation */
@keyframes sectionFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main > section {
  min-width: 100vw;
  padding: 3rem;
  border-left: 6px solid var(--accent-color-600);
  position: relative;
  border-radius: 1rem;
  margin-right: 2rem;
  animation: sectionFadeIn .6s ease-out;
}

/* Section backgrounds with glass overlay */
#sect1 {
  background: linear-gradient(to bottom right, var(--main-color-400), var(--accent-color-200));
}
#sect2 {
  background: linear-gradient(to bottom right, var(--accent-color-400), var(--main-color-100));
}
#sect3 {
  background: linear-gradient(to bottom right, var(--main-color-100), var(--main-color-200));
}
#sect4 {
  background: linear-gradient(to bottom right, var(--main-color-200), var(--accent-color-400));
}

/* Content inside each horizontal section (grid for cheatsheet) */
.hor {
  padding-left: 5rem; /* space for rotated heading */
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(22rem, 1fr));
  gap: 2rem;
}

/* -------------------------------------------------------
   TERMINOLOGY LIST
-------------------------------------------------------- */
dt {
  padding: .75rem 0;
  font-weight: 700;
}

dd {
  margin-left: 2rem;
}

dl {
  margin-top: 2rem;
}

/* -------------------------------------------------------
   CODE CARDS (Glass + Animated Tabs)
-------------------------------------------------------- */
.example-code-card {
  position: relative;
  min-width: 22rem;
  padding: 2rem 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(18px);
  background: var(--glass-bg);
  overflow: hidden;
}

/* tab heading */
.example-code-card h3 {
  background: var(--accent-color-600);
  color: white;
  padding: .5rem 1rem;
  border-radius: .75rem .75rem 0 0;
  position: absolute;
  top: -2rem;
  left: 1rem;
  box-shadow: 0 4px 10px rgba(0,0,0,.3);
  text-transform: uppercase;
  font-size: .9rem;
  letter-spacing: .08rem;
}

/* animated tab glow */
.example-code-card h3::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: 0 0 12px rgba(255,255,255,.4);
  opacity: 0;
  transition: opacity .3s ease;
}

.example-code-card:hover h3::after {
  opacity: 1;
}

/* code block */
pre {
  background-color: var(--accent-color-200);
  padding: 1rem;
  border-radius: .75rem;
  border: 1px solid var(--accent-color-800);
  overflow-x: auto;
  margin-top: 1.5rem;
}

code {
  font-family: var(--font-code);
}

/* -------------------------------------------------------
   PREVIEW BOXES (Transform, Transition, Animation)
-------------------------------------------------------- */
.preview {
  margin-top: 1rem;
  padding: .5rem;
  text-align: center;
  font-weight: 700;
  background-color: var(--main-color-600);
  border: 1px solid var(--main-color-800);
  transition: transform .3s ease, box-shadow .3s ease, background-color .3s ease;
  border-radius: .5rem;
}

.preview:hover {
  transform: scale(1.05);
  box-shadow: 0 0 14px var(--accent-color-600);
  background-color: var(--main-color-400);
}

/* -------------------------------------------------------
   TRANSFORM EXAMPLES
-------------------------------------------------------- */
.rotate { transform: rotate(20deg); }
.skew { transform: skewY(20deg); }
.scale { transform: scaleY(1.5); }
.translate { transform: translate(50px, 100px); }

/* -------------------------------------------------------
   TRANSITION EXAMPLES
-------------------------------------------------------- */
.delay {
  width: 60px;
  height: 60px;
  transition: width 3s;
  transition-delay: 1s;
}
.delay:hover { width: 300px; }

.duration {
  width: 100px;
  height: 100px;
  transition-property: width;
  transition-duration: 5s;
}
.duration:hover { width: 300px; }

.timing {
  width: 100px;
  height: 100px;
  transition: width 2s;
  transition-timing-function: linear;
}
.timing:hover { width: 300px; }

/* -------------------------------------------------------
   ANIMATION EXAMPLES
-------------------------------------------------------- */
.anim {
  width: 100px;
  height: 100px;
  position: relative;
  animation: move 5s infinite;
}

@keyframes move {
  from { left: 0px; }
  to { left: 200px; }
}