@import url("https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14..32,100..900&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Theme styling variables */
:root {
  --bg-color: #0b0b0b;
  --text-color: #ffffff;
  --divider-color: rgba(255, 255, 255, 0.15);
  --toggle-bg: #222222;
  --toggle-text: #8e8e93;
  --toggle-text-active: #000000;
  --slider-bg: #ffffff;
}

.light-mode {
  --bg-color: #ffffff;
  --text-color: #000000;
  --divider-color: rgba(0, 0, 0, 0.15);
  --toggle-bg: #e3e3e6;
  --toggle-text: #636366;
  --toggle-text-active: #000000;
  --slider-bg: #ffffff;
}

body {
  font-family: "Inter", sans-serif;
  display: flex;
  flex-direction: column;
  height: 100vh;
  padding: 0.5rem 2rem;
  color: var(--text-color);
  background-color: var(--bg-color);
  overflow: hidden;
}

header {
  width: 100%;
  padding: 1.5rem 0 0 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Divider & Tab Layout fixes */
.divider-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  gap: 1.5rem; /* Forces clean space between lines and controller */
}

.header-divider {
  flex: 1;
  border: none;
  border-top: 1px solid var(--divider-color);
}

/* 3-Part Segmented Control */
.toggle-wrapper {
  position: relative;
  display: inline-flex;
  background-color: var(--toggle-bg);
  padding: 3px;
  border-radius: 999px; /* Pill shape */
  align-items: center;
  width: 280px; /* Locked width so elements align nicely */
}

.toggle-wrapper input[type="radio"] {
  display: none;
}

.toggle-wrapper label {
  flex: 1;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 0;
  text-align: center;
  color: var(--toggle-text);
  cursor: pointer;
  border-radius: 999px;
  z-index: 2;
  transition:
    color 0.2s ease,
    font-weight 0.2s ease;
}

/* Moving slider pill background */
.toggle-slider {
  position: absolute;
  height: calc(100% - 6px);
  width: calc(33.333% - 4px); /* Perfect third of the container size */
  top: 3px;
  left: 3px;
  background-color: var(--slider-bg);
  border-radius: 999px;
  box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.15);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1;
}

/* Slide distances calculated via percentage */
#toggle-about:checked ~ .toggle-slider {
  transform: translateX(0);
}

#toggle-apps:checked ~ .toggle-slider {
  transform: translateX(100%);
}

#toggle-contact:checked ~ .toggle-slider {
  transform: translateX(200%);
}

/* Text adjustments on active focus */
#toggle-about:checked ~ label[for="toggle-about"],
#toggle-apps:checked ~ label[for="toggle-apps"],
#toggle-contact:checked ~ label[for="toggle-contact"] {
  color: var(--toggle-text-active);
  font-weight: 600;
}

/* Dynamic Page Content Control */
main {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.content-panel {
  display: none; /* Hide panels globally by default */
  font-size: 1.25rem;
  font-weight: 400;
}

/* Advanced CSS selectors linking header radio states to main container panels */
body:has(#toggle-about:checked) .view-about {
  display: block;
}

body:has(#toggle-apps:checked) .view-apps {
  display: block;
}

body:has(#toggle-contact:checked) .view-contact {
  display: block;
}

/* Fixed Footer Layout */
footer {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-divider {
  width: 100%;
  border: none;
  border-top: 1px solid var(--divider-color);
}

.footer-text {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: 0.5rem;
}