/*
 * Copyright (c) 2026 Contributors to the Eclipse Foundation
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information regarding copyright ownership.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License Version 2.0 which is available at
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * AI Disclosure: This file was largely AI-generated. The AI-generated
 * portions are made available under CC0-1.0 and not subject to the
 * project's license. The human contributor has reviewed and verified
 * that the code is correct.
 * SPDX-License-Identifier: CC0-1.0
 * Assisted-by: Claude Sonnet 4.6
 */

/* S-CORE Requirements Engineering Training Portal — Shared Styles */

:root {
  --navy: #2d1942;
  --navy-light: #3d2460;
  --blue: #7c4daa;
  --blue-light: #a382c5;
  --amber: #d97706;
  --amber-light: #fef3c7;
  --green: #2d8a4e;
  --green-light: #d1fae5;
  --red: #c0392b;
  --red-light: #fde8e8;
  --gray-100: #f5f7fa;
  --gray-200: #e2e8f0;
  --gray-400: #94a3b8;
  --gray-600: #475569;
  --gray-800: #1e293b;
  --white: #ffffff;
  --sidebar-w: 270px;
  --header-h: 60px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Consolas', 'Courier New', monospace;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--gray-100);
  min-height: 100vh;
  display: flex;
}

/* ── Sidebar ────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: var(--navy);
  color: #c8d6e5;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  overflow-y: auto;
}

#sidebar .brand {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--navy-light);
}
#sidebar .brand h1 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--white);
  line-height: 1.4;
}
#sidebar .brand p {
  font-size: 0.72rem;
  color: var(--gray-400);
  margin-top: 4px;
}

.progress-area {
  padding: 14px 20px;
  border-bottom: 1px solid var(--navy-light);
}
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--gray-400);
  margin-bottom: 6px;
}
.progress-bar-outer {
  background: var(--navy-light);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
}
.progress-bar-inner {
  background: var(--amber);
  height: 100%;
  border-radius: 4px;
  transition: width .4s ease;
}

.nav-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--gray-400);
  padding: 16px 20px 6px;
}

#sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  text-decoration: none;
  color: #c8d6e5;
  font-size: 0.84rem;
  border-left: 3px solid transparent;
  transition: background .15s, border-color .15s;
}
#sidebar nav a:hover { background: var(--navy-light); color: var(--white); }
#sidebar nav a.active { background: var(--navy-light); border-left-color: var(--amber); color: var(--white); }
#sidebar nav a.completed .nav-icon { color: var(--green); }

.nav-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
  background: var(--navy-light);
  color: var(--gray-400);
}
a.active .nav-icon { background: var(--amber); color: var(--white); }
a.completed .nav-icon { background: var(--green); color: var(--white); }

.nav-sep { margin: 8px 20px; border: none; border-top: 1px solid var(--navy-light); }

/* ── Main Layout ───────────────────────────────── */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Top Bar ───────────────────────────────────── */
#topbar {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 40px;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--gray-600);
  position: sticky;
  top: 0;
  z-index: 50;
}
#topbar a { color: var(--blue); text-decoration: none; }
#topbar a:hover { text-decoration: underline; }
#topbar .sep { color: var(--gray-400); }

/* ── Content Area ──────────────────────────────── */
#content {
  flex: 1;
  padding: 40px 48px 80px;
  max-width: 900px;
}

/* ── Typography ───────────────────────────────── */
h1.module-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 6px;
  line-height: 1.25;
}
.module-meta {
  font-size: 0.82rem;
  color: var(--gray-400);
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.module-meta span { display: flex; align-items: center; gap: 4px; }

h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--blue);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--gray-200);
}
h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: 24px 0 10px;
}
p { line-height: 1.7; margin-bottom: 14px; color: var(--gray-800); }
ul, ol { margin: 10px 0 16px 22px; }
li { line-height: 1.7; margin-bottom: 4px; }
strong { color: var(--gray-800); }

/* ── Callout Boxes ─────────────────────────────── */
.callout {
  border-radius: 8px;
  padding: 16px 20px;
  margin: 20px 0;
  border-left: 4px solid;
}
.callout.definition {
  background: #f5f0ff;
  border-color: var(--blue);
}
.callout.definition .callout-label { color: var(--blue); }
.callout.example {
  background: var(--amber-light);
  border-color: var(--amber);
}
.callout.example .callout-label { color: var(--amber); }
.callout.important {
  background: #fef2f2;
  border-color: var(--red);
}
.callout.important .callout-label { color: var(--red); }
.callout.tip {
  background: var(--green-light);
  border-color: var(--green);
}
.callout.tip .callout-label { color: var(--green); }
.callout-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.callout p:last-child { margin-bottom: 0; }

/* ── Tables ─────────────────────────────────────── */
.table-wrap { overflow-x: auto; margin: 20px 0; border-radius: 8px; border: 1px solid var(--gray-200); }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead { background: var(--blue); color: var(--white); }
thead th { padding: 10px 14px; text-align: left; font-weight: 600; }
tbody tr:nth-child(even) { background: var(--gray-100); }
tbody tr:hover { background: #e8f0fe; }
tbody td { padding: 9px 14px; border-bottom: 1px solid var(--gray-200); vertical-align: top; }
tbody tr:last-child td { border-bottom: none; }

/* ── ASIL badge colors ────────────────────────── */
.asil { display: inline-block; padding: 2px 8px; border-radius: 4px; font-weight: 700; font-size: 0.8rem; }
.asil-qm  { background: #e5e7eb; color: #374151; }
.asil-a   { background: #fef3c7; color: #92400e; }
.asil-b   { background: #fed7aa; color: #9a3412; }
.asil-c   { background: #fecaca; color: #991b1b; }
.asil-d   { background: #dc2626; color: #fff; }

/* ── Collapsible Sections ──────────────────────── */
.collapsible {
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  margin: 16px 0;
  overflow: hidden;
}
.collapsible-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: var(--white);
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background .15s;
}
.collapsible-header:hover { background: var(--gray-100); }
.collapsible-header .arrow {
  font-size: 0.8rem;
  color: var(--gray-400);
  transition: transform .25s;
}
.collapsible-header.open .arrow { transform: rotate(180deg); }
.collapsible-body { display: none; padding: 16px 20px; background: var(--white); border-top: 1px solid var(--gray-200); }
.collapsible-body.open { display: block; }

/* ── Inline Quiz (per module) ──────────────────── */
.quiz-section {
  background: var(--white);
  border: 2px solid var(--blue);
  border-radius: 12px;
  padding: 28px 32px;
  margin: 40px 0;
}
.quiz-section h2 {
  color: var(--blue);
  border: none;
  padding: 0;
  margin: 0 0 6px;
  font-size: 1.15rem;
}
.quiz-section .quiz-intro { color: var(--gray-600); font-size: 0.88rem; margin-bottom: 24px; }
.question-block { margin-bottom: 28px; }
.question-text { font-weight: 600; margin-bottom: 12px; line-height: 1.55; }
.question-num { color: var(--blue); margin-right: 6px; }
.options { list-style: none; margin: 0; padding: 0; }
.options li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: 6px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: background .15s, border-color .15s;
  font-size: 0.9rem;
  line-height: 1.5;
}
.options li:hover { border-color: var(--blue-light); background: #f5f0ff; }
.options li.selected { border-color: var(--blue); background: #f5f0ff; }
.options li.correct { border-color: var(--green); background: var(--green-light); }
.options li.wrong { border-color: var(--red); background: var(--red-light); }
.options li.reveal-correct { border-color: var(--green); background: var(--green-light); }
.opt-letter {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-600);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
li.correct .opt-letter   { background: var(--green); color: #fff; }
li.wrong .opt-letter     { background: var(--red); color: #fff; }
li.reveal-correct .opt-letter { background: var(--green); color: #fff; }
.feedback {
  display: none;
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  line-height: 1.5;
}
.feedback.correct-fb { background: var(--green-light); color: #065f46; }
.feedback.wrong-fb   { background: var(--red-light); color: #7f1d1d; }
.quiz-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: var(--white);
  border: none;
  padding: 11px 24px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background .15s;
}
.quiz-submit:hover { background: var(--blue-light); }
.quiz-submit:disabled { background: var(--gray-400); cursor: not-allowed; }
.quiz-result {
  display: none;
  margin-top: 20px;
  padding: 16px 20px;
  border-radius: 8px;
  font-weight: 600;
}
.quiz-result.pass { background: var(--green-light); color: #065f46; border-left: 4px solid var(--green); }
.quiz-result.fail { background: var(--red-light); color: #7f1d1d; border-left: 4px solid var(--red); }

/* ── Navigation Footer ─────────────────────────── */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--gray-200);
  gap: 12px;
}
.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background .15s;
}
.btn-prev { background: var(--white); color: var(--blue); border: 1.5px solid var(--gray-200); }
.btn-prev:hover { background: var(--gray-100); }
.btn-next { background: var(--blue); color: var(--white); border: 1.5px solid transparent; }
.btn-next:hover { background: var(--blue-light); }

/* ── Intro / Index Page ────────────────────────── */
.course-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 100%);
  border-radius: 12px;
  padding: 40px 48px;
  color: var(--white);
  margin-bottom: 40px;
}
.course-hero h1 { font-size: 2.2rem; margin-bottom: 10px; }
.course-hero p { color: #c8d6e5; max-width: 600px; line-height: 1.7; }
.module-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.module-card {
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-radius: 10px;
  padding: 20px 24px;
  text-decoration: none;
  color: var(--gray-800);
  transition: border-color .15s, box-shadow .15s;
  display: block;
}
.module-card:hover { border-color: var(--blue); box-shadow: 0 4px 12px rgba(26,77,143,.1); }
.module-card .card-num { font-size: 0.72rem; font-weight: 700; color: var(--blue); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 6px; }
.module-card h3 { font-size: 1rem; margin: 0 0 6px; }
.module-card p { font-size: 0.82rem; color: var(--gray-600); margin: 0; }
.module-card .card-meta { font-size: 0.75rem; color: var(--gray-400); margin-top: 10px; }

/* ── Print ─────────────────────────────────────── */
@media print {
  #sidebar, #topbar, .page-nav, .quiz-submit { display: none; }
  #main { margin-left: 0; }
  #content { padding: 20px; max-width: 100%; }
  .collapsible-body { display: block !important; }
}