/*
 * theme.css — dark / light mode + language & theme controls.
 *
 * Loaded AFTER main.css (see index.html). It never edits main.css:
 *   • DARK  = the existing design, left untouched (no overrides below).
 *   • LIGHT = overrides scoped to  html[data-theme="light"].
 *
 * The attribute data-theme is set on <html> by the tiny inline script in
 * <head> (before first paint) and by assets/js/switcher.js on click.
 */

/* ------------------------------------------------------------------ */
/* 1. Palette tokens for the controls                                  */
/* ------------------------------------------------------------------ */
:root {
  --ctl-fg: #ffffff;
  --ctl-line: rgba(255, 255, 255, 0.55);
  --ctl-bg: rgba(27, 31, 34, 0.55);
  --ctl-hover: rgba(255, 255, 255, 0.14);
  --ctl-on-bg: #ffffff;
  --ctl-on-fg: #1b1f22;
}

html[data-theme="light"] {
  --ctl-fg: #1b1f22;
  --ctl-line: rgba(27, 31, 34, 0.55);
  --ctl-bg: rgba(255, 255, 255, 0.7);
  --ctl-hover: rgba(27, 31, 34, 0.08);
  --ctl-on-bg: #1b1f22;
  --ctl-on-fg: #ffffff;
  color-scheme: light;
}

/* ------------------------------------------------------------------ */
/* 2. Controls (language + theme)                                      */
/* ------------------------------------------------------------------ */
#site-controls {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Hidden during the intro animation, like the rest of the header */
body.is-preload #site-controls {
  opacity: 0;
}

#site-controls .ctl-lang {
  display: flex;
  border: solid 1px var(--ctl-line);
  border-radius: 4px;
  overflow: hidden;
  background: var(--ctl-bg);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

/* Reset the global <button> look from main.css, then restyle */
#site-controls .ctl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 2.25rem;
  min-width: 2.4rem;
  padding: 0 0.7rem;
  margin: 0;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  color: var(--ctl-fg) !important;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15rem;
  line-height: 1;
  text-indent: 0.15rem; /* optical centering with letter-spacing */
  cursor: pointer;
  transition:
    background-color 0.2s ease-in-out,
    color 0.2s ease-in-out;
}

#site-controls .ctl-btn:hover {
  background: var(--ctl-hover);
}

#site-controls .ctl-btn:focus-visible {
  outline: 2px solid var(--ctl-fg);
  outline-offset: -3px;
}

#site-controls .ctl-lang .ctl-btn[aria-pressed="true"] {
  background: var(--ctl-on-bg);
  color: var(--ctl-on-fg) !important;
}

#site-controls .ctl-theme {
  border: solid 1px var(--ctl-line);
  border-radius: 4px;
  background: var(--ctl-bg);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  font-size: 0.85rem;
  text-indent: 0;
}

/* Show the icon of the mode you will switch TO */
html[data-theme="dark"] #site-controls .ctl-theme .fa-moon {
  display: none;
}
html[data-theme="light"] #site-controls .ctl-theme .fa-sun {
  display: none;
}

/* Close "X" of an open article sits top-right of the article; on narrower
   screens the article spans the whole width, so move the controls to the left. */
@media screen and (max-width: 980px) {
  #site-controls {
    right: auto;
    left: 0.6rem;
    top: 0.6rem;
  }
}

@media screen and (max-width: 480px) {
  #site-controls .ctl-btn {
    height: 2rem;
    min-width: 2.1rem;
    padding: 0 0.55rem;
  }
}

/* Smooth colour change when the user clicks the theme button (class is
   added for ~400ms by switcher.js, so it never affects page-load animations) */
html.theme-anim *,
html.theme-anim *:before,
html.theme-anim *:after {
  transition:
    background-color 0.35s ease,
    color 0.35s ease,
    border-color 0.35s ease,
    box-shadow 0.35s ease !important;
}

@media (prefers-reduced-motion: reduce) {
  html.theme-anim *,
  html.theme-anim *:before,
  html.theme-anim *:after {
    transition: none !important;
  }
}

/* ------------------------------------------------------------------ */
/* 3. LIGHT THEME overrides                                            */
/* ------------------------------------------------------------------ */

/* Page + base text */
html[data-theme="light"] body {
  background: #eef1f5;
}

html[data-theme="light"] body,
html[data-theme="light"] input,
html[data-theme="light"] select,
html[data-theme="light"] textarea {
  color: #1b1f22;
}

html[data-theme="light"] strong,
html[data-theme="light"] b,
html[data-theme="light"] h1,
html[data-theme="light"] h2,
html[data-theme="light"] h3,
html[data-theme="light"] h4,
html[data-theme="light"] h5,
html[data-theme="light"] h6,
html[data-theme="light"] label,
html[data-theme="light"] table th,
html[data-theme="light"] .project-content h3 {
  color: #1b1f22;
}

html[data-theme="light"] a {
  border-bottom-color: rgba(27, 31, 34, 0.5);
}

html[data-theme="light"] a:hover {
  border-bottom-color: transparent;
}

html[data-theme="light"] h1.major,
html[data-theme="light"] h2.major,
html[data-theme="light"] h3.major,
html[data-theme="light"] h4.major,
html[data-theme="light"] h5.major,
html[data-theme="light"] h6.major,
html[data-theme="light"] hr {
  border-bottom-color: #1b1f22;
}

html[data-theme="light"] blockquote {
  border-left-color: #1b1f22;
}

html[data-theme="light"] code {
  background: rgba(27, 31, 34, 0.08);
}

/* Animated background: pale wash over the GIF so dark text stays readable
html[data-theme="light"] #bg:before {
  background-image: linear-gradient(to top, rgba(238, 241, 245, 0.86), rgba(238, 241, 245, 0.86));
} */

/* Inverts black background to pure white and white lines to black */
html[data-theme="light"] .bg-video {
  filter: invert(1);
  -webkit-filter: invert(1);
}

html[data-theme="light"] body.is-preload #bg:before {
  background-color: #eef1f5;
}

html[data-theme="light"] #header > *:before,
html[data-theme="light"] #header nav.use-middle:after {
  background: #1b1f22;
}

html[data-theme="light"] #header .logo,
html[data-theme="light"] #header .content {
  border-color: #1b1f22;
}

html[data-theme="light"] #header nav ul {
  border-color: #1b1f22;
}

html[data-theme="light"] #header nav ul li {
  border-left-color: #1b1f22;
}

html[data-theme="light"] #header nav ul li:first-child {
  border-left-color: transparent;
}

html[data-theme="light"] #header nav ul li a:hover {
  background-color: rgba(27, 31, 34, 0.08);
}

html[data-theme="light"] #header nav ul li a:active {
  background-color: rgba(27, 31, 34, 0.16);
}

@media screen and (max-width: 480px) {
  html[data-theme="light"] #header nav ul li {
    border-left-color: transparent;
    border-top-color: #1b1f22;
  }
  html[data-theme="light"] #header nav ul li:first-child {
    border-top-color: transparent;
  }
}

/* Article panel */
html[data-theme="light"] #main article {
  background-color: rgba(255, 255, 255, 0.93);
  box-shadow: 0 12px 40px rgba(20, 30, 50, 0.18);
}

html[data-theme="light"] #main article .close:before {
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' width='20px' height='20px' viewBox='0 0 20 20' zoomAndPan='disable'%3E%3Cstyle%3Eline %7B stroke: %231b1f22%3B stroke-width: 1%3B %7D%3C/style%3E%3Cline x1='2' y1='2' x2='18' y2='18' /%3E%3Cline x1='18' y1='2' x2='2' y2='18' /%3E%3C/svg%3E");
}

html[data-theme="light"] #main article .close:hover:before {
  background-color: rgba(27, 31, 34, 0.08);
}

html[data-theme="light"] #main article .close:active:before {
  background-color: rgba(27, 31, 34, 0.16);
}

/* Projects list */
html[data-theme="light"] .project-container {
  border-bottom-color: rgba(27, 31, 34, 0.14);
}

/* Buttons */
html[data-theme="light"] input[type="submit"],
html[data-theme="light"] input[type="reset"],
html[data-theme="light"] input[type="button"],
html[data-theme="light"] button,
html[data-theme="light"] .button {
  box-shadow: inset 0 0 0 1px #1b1f22;
  color: #1b1f22 !important;
}

html[data-theme="light"] input[type="submit"]:hover,
html[data-theme="light"] input[type="reset"]:hover,
html[data-theme="light"] input[type="button"]:hover,
html[data-theme="light"] button:hover,
html[data-theme="light"] .button:hover {
  background-color: rgba(27, 31, 34, 0.08);
}

html[data-theme="light"] input[type="submit"]:active,
html[data-theme="light"] input[type="reset"]:active,
html[data-theme="light"] input[type="button"]:active,
html[data-theme="light"] button:active,
html[data-theme="light"] .button:active {
  background-color: rgba(27, 31, 34, 0.16);
}

html[data-theme="light"] input[type="submit"].primary,
html[data-theme="light"] input[type="reset"].primary,
html[data-theme="light"] input[type="button"].primary,
html[data-theme="light"] button.primary,
html[data-theme="light"] .button.primary {
  background-color: #1b1f22;
  color: #ffffff !important;
}

/* The theme/lang controls use <button>; keep their own styling (section 2) */
html[data-theme="light"] #site-controls .ctl-btn {
  box-shadow: none;
  color: var(--ctl-fg) !important;
}
html[data-theme="light"] #site-controls .ctl-lang .ctl-btn[aria-pressed="true"] {
  color: var(--ctl-on-fg) !important;
}

/* Form fields */
html[data-theme="light"] input[type="text"],
html[data-theme="light"] input[type="password"],
html[data-theme="light"] input[type="email"],
html[data-theme="light"] input[type="tel"],
html[data-theme="light"] select,
html[data-theme="light"] textarea {
  border-color: #1b1f22;
}

html[data-theme="light"] input[type="text"]:focus,
html[data-theme="light"] input[type="password"]:focus,
html[data-theme="light"] input[type="email"]:focus,
html[data-theme="light"] input[type="tel"]:focus,
html[data-theme="light"] select:focus,
html[data-theme="light"] textarea:focus {
  background: rgba(27, 31, 34, 0.05);
  border-color: #1b1f22;
  box-shadow: 0 0 0 1px #1b1f22;
}

html[data-theme="light"] ::-webkit-input-placeholder {
  color: rgba(27, 31, 34, 0.5) !important;
}
html[data-theme="light"] ::-moz-placeholder {
  color: rgba(27, 31, 34, 0.5) !important;
}

/* Social icons */
html[data-theme="light"] ul.icons li a {
  box-shadow: inset 0 0 0 1px #1b1f22;
}

html[data-theme="light"] ul.icons li a:hover {
  background-color: rgba(27, 31, 34, 0.08);
}

html[data-theme="light"] ul.icons li a:active {
  background-color: rgba(27, 31, 34, 0.16);
}

/* Tables / boxes (unused today, kept so future content is themed too) */
html[data-theme="light"] table tbody tr,
html[data-theme="light"] table thead,
html[data-theme="light"] table tfoot,
html[data-theme="light"] .box {
  border-color: #1b1f22;
}
/* ------------------------------------------------------------------ */
/* 4. Header Nav Equal-Width Alignment                                */
/* ------------------------------------------------------------------ */
#header nav ul {
  display: grid;
  grid-template-columns: repeat(4, 1fr); /* 4 strictly equal columns */
}

#header nav ul li {
  width: 100%;
}

#header nav ul li a {
  width: 100%;
  min-width: 0; /* Remove hardcoded 7.5rem clamp */
  padding: 0 0.8rem; /* Prevent text touching borders */
  text-align: center;
  white-space: nowrap;
}

/* Maintain default vertical stack on mobile phones */
@media screen and (max-width: 480px) {
  #header nav ul {
    display: flex;
    flex-direction: column;
  }
}