/*
 * Redesigned style sheet for the Doku‑Portal.
 * This design embraces modern 2025 web‑design trends: generous white space, bold typography,
 * pastel gradients, soft glassmorphism cards and subtle micro‑interactions【288689526763335†L55-L67】.
 * The colour palette now shifts auf Blautöne mit einem dezenten Cyan‑Akzent. Diese Mischung
 * wirkt frisch und professionell, während Glas‑Effekte weiterhin Tiefe verleihen. Hover‑States
 * geben dezent Rückmeldung und runden das moderne Erscheinungsbild ab【288689526763335†L125-L137】.
 */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap');

/*
 * CSS variables for theming. Colours can be customised here without touching the rest of the
 * stylesheet. The chosen palette is based on muted pastels with a vibrant coral accent.
 */
:root {
  /* Light theme (blue variant) */
  --bg-gradient-start: #e9f1fb;
  --bg-gradient-end: #f0f6fd;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.4);
  --primary-colour: #3b82f6; /* primary blue */
  --secondary-colour: #06b6d4; /* cyan accent */
  --accent-colour: #2563eb; /* deeper blue accent */
  --text-colour: #1f2937; /* dark grey */
  --muted-text: #6b7280; /* muted grey */
  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius: 16px;
}

/* Dark theme variables for optional dark mode */
[data-theme='dark'] {
  --bg-gradient-start: #0a192f;
  --bg-gradient-end: #0f172a;
  --glass-bg: rgba(17, 24, 39, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  --primary-colour: #3b82f6;
  --secondary-colour: #06b6d4;
  --accent-colour: #2563eb;
  --text-colour: #f1f5f9;
  --muted-text: #94a3b8;
  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
}

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

body {
  font-family: 'Poppins', sans-serif;
  min-height: 100vh;
  color: var(--text-colour);
  /* pastel gradient background */
  background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
  overflow-x: hidden;
}

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

/* Sidebar */
/* Sidebar with glass effect */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 240px;
  padding-top: 80px;
  overflow-y: auto;
  z-index: 1030;
  backdrop-filter: blur(16px);
  background: var(--glass-bg);
  border-right: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
}

.sidebar .logo {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--primary-colour);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar .nav-link {
  display: block;
  padding: 12px 20px;
  margin: 0 16px 8px;
  border-radius: var(--radius);
  color: var(--text-colour);
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.sidebar .nav-link.active,
  .sidebar .nav-link:hover {
  background: var(--primary-colour);
  color: #fff;
}

/* Enforce white text on active link to override Bootstrap defaults */
.sidebar .nav-link.active {
  color: #fff !important;
}

/* Topbar */
/* Top bar uses glass effect with a soft gradient overlay */
.topbar {
  position: fixed;
  top: 0;
  left: 240px;
  right: 0;
  height: 72px;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(16px);
  background: linear-gradient(90deg, var(--primary-colour), var(--secondary-colour));
  color: #fff;
  box-shadow: var(--shadow-soft);
  z-index: 1020;
}

.topbar h3 {
  margin: 0;
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}

.topbar .form-control {
  border-radius: var(--radius);
  border: none;
  width: 220px;
}

.topbar .form-control:focus {
  outline: none;
  box-shadow: none;
}

/* Content */
/* Main content area. Extra padding to account for sidebar and topbar heights. */
.content {
  margin-left: 240px;
  padding: 112px 32px 32px;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-colour);
  line-height: 1.2;
}

p {
  color: var(--muted-text);
  line-height: 1.6;
}

/* Buttons */
/* Buttons */
.btn-primary-custom {
  background: var(--accent-colour);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 10px 24px;
  font-weight: 600;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary-custom:hover {
  /* Use a slightly darker tone for hover instead of the SASS darken() helper */
  background: #e1585f;
  transform: translateY(-1px);
}

.btn-outline-light-custom {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius);
  padding: 10px 24px;
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}

.btn-outline-light-custom:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-outline-gray {
  background: var(--glass-bg);
  color: var(--text-colour);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 10px 24px;
  font-weight: 600;
  transition: background 0.2s;
  backdrop-filter: blur(8px);
}

.btn-outline-gray:hover {
  background: rgba(255, 255, 255, 0.5);
}

/*
 * Responsive adjustments
 *
 * On smaller devices the fixed sidebar consumes too much horizontal
 * space and can overwhelm the content area. We collapse the sidebar
 * off‑canvas by default and reveal it via a hamburger toggle. The
 * top bar stretches across the full viewport width and the main
 * content no longer includes the sidebar offset. Cards and rows
 * naturally stack using Bootstrap’s grid classes, so we don’t need
 * explicit column changes here.
 */

/* Hamburger button styling. Only visible on small screens via HTML.
   Uses no border and inherits the colour of the top bar. */
.hamburger {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: #fff;
  padding: 0 8px;
  cursor: pointer;
}

@media (max-width: 991.98px) {
  /* Hide the sidebar off screen until toggled */
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    width: 240px;
    /* Prevent the off‑screen sidebar from intercepting clicks/taps on touch devices. */
    pointer-events: none;
  }
  .sidebar.active {
    transform: translateX(0);
    /* Restore pointer events when the sidebar becomes visible */
    pointer-events: auto;
  }
  /* Topbar spans full width when sidebar is hidden */
  .topbar {
    left: 0;
    padding-left: 16px;
    padding-right: 16px;
    height: 64px;
  }
  .topbar h3 {
    font-size: 1.2rem;
    margin: 0;
  }
  /* Content without a permanent sidebar */
  .content {
    margin-left: 0;
    padding-left: 16px;
    padding-right: 16px;
    padding-top: 96px;
  }
  /* Adjust login card padding for small viewports */
  .login-card {
    padding: 32px 24px;
  }
  /* Ensure document section list fills full width on small screens */
  .list-group {
    flex-direction: row !important;
    flex-wrap: wrap;
    gap: 8px;
  }
  .list-group-item {
    flex: 1 1 calc(50% - 8px);
    text-align: center;
  }
  .list-group-item.active {
    flex-basis: 100%;
  }
}

/* Cards */
/* Document overview cards using glass effect */
.doc-card {
  background: var(--glass-bg);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
  padding: 24px;
  transition: box-shadow 0.3s, transform 0.2s;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  backdrop-filter: blur(12px);
}

.doc-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.doc-card h5 {
  margin-bottom: 0.5rem;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-colour);
}

.doc-card .doc-meta {
  font-size: 0.875rem;
  color: var(--muted-text);
}

.doc-card .actions {
  margin-top: 16px;
  display: flex;
  gap: 8px;
}

/* Login page */
.login-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

/* decorative blobs in login background */
.login-container::before,
.login-container::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
  animation: float 8s infinite alternate ease-in-out;
}

.login-container::before {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle at 30% 30%, var(--primary-colour), transparent 70%);
  top: -200px;
  left: -200px;
}

.login-container::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle at 70% 70%, var(--accent-colour), transparent 70%);
  bottom: -150px;
  right: -150px;
}

@keyframes float {
  to {
    transform: translateY(20px);
  }
}

.login-card {
  position: relative;
  z-index: 1;
  max-width: 380px;
  width: 90%;
  padding: 48px 40px;
  text-align: center;
  border-radius: var(--radius);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(20px);
}

.login-card h1 {
  margin-bottom: 1.5rem;
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-colour);
}

.login-card .input-group-text {
  background: transparent;
  border: 1px solid var(--glass-border);
  border-right: none;
  padding: 0 12px;
  color: var(--primary-colour);
  display: flex;
  align-items: center;
}

/* ensure icons inherit the accent colour in login fields */
.login-card .input-group-text i {
  color: var(--primary-colour);
}

.login-card .form-control {
  border: 1px solid var(--glass-border);
  border-left: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 10px 14px;
  background: transparent;
  color: var(--text-colour);
  backdrop-filter: blur(10px);
}

.login-card .form-control::placeholder {
  color: var(--muted-text);
}

.login-card .form-control:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(127, 90, 240, 0.2);
  border-color: var(--primary-colour);
}

.login-card .btn-primary-custom {
  width: 100%;
  margin-top: 24px;
}

.login-card small {
  display: block;
  margin-top: 16px;
  font-size: 0.825rem;
  color: var(--muted-text);
}

/* Section list (document page) */
.list-group-item {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  margin-bottom: 6px;
  background: var(--glass-bg);
  box-shadow: var(--shadow-soft);
  color: var(--text-colour);
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  backdrop-filter: blur(12px);
}

.list-group-item.active,
.list-group-item:hover {
  background: var(--primary-colour);
  color: #fff;
}

/* Ensure document page section list stacks vertically */
/* Force vertical stacking for the document section list */
.list-group {
  display: flex !important;
  flex-direction: column !important;
}

/* Form sections in document page */
section textarea {
  width: 100%;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  color: var(--text-colour);
  resize: vertical;
  box-shadow: var(--shadow-soft);
  font-size: 0.95rem;
}

section textarea::placeholder {
  color: var(--muted-text);
}

section input[type='file'] {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 10px 12px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  background: var(--glass-bg);
  color: var(--text-colour);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-soft);
}

/* Theme switch / Dark mode toggle styling */
#themeSwitch {
  position: relative;
  width: 50px;
  height: 26px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 13px;
  cursor: pointer;
  outline: none;
  transition: background 0.3s;
}

#themeSwitch::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: var(--primary-colour);
  border-radius: 50%;
  transition: transform 0.3s, background 0.3s;
}

#themeSwitch:checked {
  background: var(--primary-colour);
}

#themeSwitch:checked::before {
  transform: translateX(24px);
  background: var(--secondary-colour);
}

/*
 * General input styling for text and password fields (e.g. settings page)
 * Overrides Bootstrap defaults to provide a consistent glassmorphism look across
 * forms while maintaining accessibility. Inputs use a translucent background,
 * softened border and subtle shadow to blend into the pastel gradient backdrop.
 */
.form-control {
  border: 1px solid var(--glass-border) !important;
  border-radius: var(--radius) !important;
  background: var(--glass-bg) !important;
  color: var(--text-colour) !important;
  backdrop-filter: blur(8px) !important;
  box-shadow: var(--shadow-soft) !important;
}

.form-control::placeholder {
  color: var(--muted-text) !important;
}