/*
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * Additional attribution notice under AGPL-3.0-or-later section 7(b):
 *
 * Modified versions must preserve the following author attribution in the
 * source code notices and in the interactive web tool's legal notice/footer
 * or an equivalent "About / Credits" area:
 *
 * ©2026 - MarTinX (https://github.com/martinx72) /
 * Retro Game Restore (https://retrogamerestore.com/)
 */

:root {
  color-scheme: light;
  --bg: #edf7ff;
  --panel: rgba(255, 255, 255, 0.86);
  --ink: #162533;
  --muted: #5a7186;
  --line: #bdd8ec;
  --accent: #1a73b8;
  --accent-2: #78bee9;
  --danger: #bd3340;
  --field: #ffffff;
  --code: #e8f4ff;
  --shadow: rgba(40, 91, 130, 0.13);
  --body-bg:
    radial-gradient(circle at 12% 8%, rgba(120, 190, 233, 0.32), transparent 30%),
    radial-gradient(circle at 82% 0%, rgba(26, 115, 184, 0.14), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101315;
  --panel: rgba(25, 29, 30, 0.88);
  --ink: #eef8ff;
  --muted: #aab9c8;
  --line: #3a4758;
  --accent: #ff725c;
  --accent-2: #a9dcff;
  --danger: #ff8a7a;
  --field: #111722;
  --code: #222834;
  --shadow: rgba(0, 0, 0, 0.36);
  --body-bg:
    radial-gradient(circle at 12% 8%, rgba(169, 220, 255, 0.16), transparent 30%),
    radial-gradient(circle at 72% 2%, rgba(144, 107, 255, 0.16), transparent 25%),
    radial-gradient(circle at 88% 14%, rgba(255, 114, 92, 0.12), transparent 28%),
    linear-gradient(180deg, #141019 0%, var(--bg) 100%);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  padding-bottom: 58px;
  color: var(--ink);
  background: var(--body-bg);
  font-family: "Aptos", "Noto Sans TC", "Segoe UI", sans-serif;
}

main {
  max-width: 1420px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(2.2rem, 4vw, 4.8rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

p {
  color: var(--muted);
  line-height: 1.5;
}

code,
textarea,
pre {
  font-family: "Cascadia Mono", "SFMono-Regular", Consolas, monospace;
}

code {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--code);
}

.hero {
  margin-bottom: 24px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(360px, 0.8fr) minmax(520px, 1.2fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 22px 60px var(--shadow);
  padding: 18px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

label {
  display: block;
  margin-bottom: 12px;
  font-weight: 800;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  margin-top: 7px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--field);
  color: var(--ink);
}

input,
select {
  min-height: 42px;
  padding: 9px 11px;
}

textarea {
  min-height: 110px;
  padding: 12px;
  resize: vertical;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

button:hover {
  filter: brightness(1.04);
}

.ghost-button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.danger-button {
  background: var(--danger);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}

.button-row.compact {
  justify-content: flex-end;
  margin-bottom: 0;
}

.load-row {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto auto;
  gap: 12px;
  align-items: center;
}

.file-drop {
  display: grid;
  place-items: center;
  min-height: 54px;
  border: 2px dashed var(--accent-2);
  border-radius: 18px;
  background: rgba(120, 190, 233, 0.14);
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.file-drop input {
  display: none;
}

.file-drop.drag-over {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-2) 28%, transparent);
  transform: translateY(-1px);
}

.tab-strip {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  margin: -2px -2px 18px;
  padding: 0 8px;
  border-bottom: 1px solid var(--line);
}

.tab {
  position: relative;
  min-width: 150px;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 16px 16px 0 0;
  background: color-mix(in srgb, var(--field) 64%, transparent);
  color: var(--ink);
  box-shadow: inset 0 -10px 18px rgba(0, 0, 0, 0.04);
}

.tab.active {
  border-color: var(--accent-2);
  background: var(--panel);
  color: var(--ink);
  transform: translateY(1px);
  box-shadow: 0 -10px 24px var(--shadow);
}

.tab.active::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--panel);
  content: "";
}

.tab-panel[hidden] {
  display: none;
}

.game-list-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 12px;
}

#game-section-list {
  min-height: 250px;
  margin-bottom: 16px;
}

option {
  padding: 8px 10px;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.help {
  margin: 6px 0 16px;
  font-size: 0.92rem;
}

.preview {
  min-height: 660px;
  white-space: pre;
  overflow: auto;
}

.status {
  min-height: 24px;
  margin-top: 12px;
  color: var(--muted);
  font-weight: 800;
}

.status.error {
  color: var(--danger);
}

.floating-controls {
  position: fixed;
  z-index: 10;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.language-select {
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 14px;
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 16px 40px var(--shadow);
  font: inherit;
  font-weight: 800;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  padding: 0;
  box-shadow: 0 16px 40px var(--shadow);
}

footer {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 12px 18px;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
  backdrop-filter: blur(12px);
}

footer a {
  color: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 1080px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .load-row {
    grid-template-columns: 1fr;
  }

  #game-section-list,
  .preview {
    min-height: 320px;
  }
}

@media (max-width: 640px) {
  main {
    padding: 24px 12px 72px;
  }

  .grid.two {
    grid-template-columns: 1fr;
  }

  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}