/*
 * 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: #edf7fb;
  --panel: #ffffff;
  --panel-soft: #f4fbff;
  --text: #142332;
  --muted: #597083;
  --line: #b8d8eb;
  --accent: #1674a5;
  --accent-strong: #0e577f;
  --danger: #c34134;
  --shadow: 0 18px 50px rgba(18, 70, 100, 0.13);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111621;
  --panel: #182230;
  --panel-soft: #202d3e;
  --text: #eaf6ff;
  --muted: #a8bdd0;
  --line: #31465b;
  --accent: #ff765e;
  --accent-strong: #ff9b6e;
  --danger: #ff725f;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 14% 8%, rgba(89, 183, 225, 0.25), transparent 30%),
    radial-gradient(circle at 90% 0%, rgba(255, 118, 94, 0.18), transparent 28%),
    var(--bg);
  color: var(--text);
  font: 15px/1.5 "Trebuchet MS", "Verdana", sans-serif;
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0 28px;
}

.theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 10;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.hero {
  padding: 8px 4px 22px;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.hero p,
.panel p {
  margin: 0;
  color: var(--muted);
}

code {
  color: var(--accent-strong);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 18px;
  align-items: start;
}

.tab-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.tab-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: flex-end;
  min-height: 58px;
  margin: 0;
  border-bottom: 1px solid var(--line);
  padding: 10px 14px 0;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel-soft) 82%, transparent), var(--panel));
}

.tab {
  position: relative;
  min-width: 180px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 16px 16px 0 0;
  background: var(--panel-soft);
  color: var(--muted);
  padding: 13px 22px 14px;
  box-shadow: inset 0 -10px 18px rgba(0, 0, 0, 0.06);
}

.tab.active {
  z-index: 1;
  border-color: var(--line);
  background: var(--panel);
  color: var(--accent-strong);
  box-shadow: 0 -8px 22px var(--shadow);
  transform: translateY(1px);
}

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

.tab-panel {
  padding: 18px;
  background: var(--panel);
}

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

.panel {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
  padding: 22px;
}

.warning {
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--panel), var(--panel-soft));
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

h2,
h3 {
  margin: 0 0 8px;
  line-height: 1.15;
}

h3 {
  margin-top: 22px;
  font-size: 16px;
}

label {
  display: block;
  margin: 12px 0 7px;
  color: var(--muted);
  font-weight: 700;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--text);
  padding: 10px 12px;
}

select[size] {
  min-height: 260px;
  padding: 8px;
}

.split-list select[size] {
  flex: 1;
}

.save-column select[size] {
  min-height: 196px;
}

option {
  padding: 5px 7px;
}

button {
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 800;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

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

.file-drop {
  display: grid;
  place-items: center;
  min-height: 92px;
  border: 2px dashed var(--line);
  border-radius: 18px;
  background: var(--panel-soft);
  color: var(--accent-strong);
  cursor: pointer;
}

.compact-drop {
  min-height: 66px;
}

.file-drop input {
  display: none;
}

.summary,
.save-detail,
.status {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-soft);
  padding: 12px;
  color: var(--muted);
  white-space: pre-wrap;
}

.status:empty {
  display: none;
}

.mini-meta {
  min-height: 54px;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--muted);
  padding: 9px 11px;
  font-size: 13px;
  line-height: 1.35;
  white-space: pre-wrap;
}

.split-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: stretch;
}

.split-list > div {
  display: flex;
  flex-direction: column;
}

.button-row,
.save-row,
.inline-form,
.import-grid {
  display: flex;
  gap: 10px;
  align-items: end;
}

.save-row input,
.inline-form input {
  flex: 1;
}

.import-grid {
  display: grid;
  grid-template-columns: 1fr auto;
}

.hint {
  font-size: 13px;
}

.empty-slots {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-soft);
  padding: 10px 12px;
}

.empty-slots summary {
  color: var(--accent-strong);
  cursor: pointer;
  font-weight: 800;
}

.empty-slots select {
  margin-top: 10px;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 22px 0;
}

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: 860px) {
  .workspace,
  .split-list,
  .import-grid {
    grid-template-columns: 1fr;
  }

  .button-row,
  .save-row,
  .inline-form {
    align-items: stretch;
    flex-direction: column;
  }
}