/* FluentGerman.ai — Design System v2 */

/* ── Fonts ────────────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── CSS Custom Properties ───────────────────────────────────────── */
:root {
  /* Gradient palette */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-bg: linear-gradient(135deg, #0c0e1a 0%, #141829 50%, #0f1423 100%);
  --gradient-card: linear-gradient(145deg, rgba(30, 35, 55, 0.8), rgba(20, 25, 42, 0.6));
  --gradient-btn: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-btn-hover: linear-gradient(135deg, #7b93ff 0%, #8a5cb8 100%);
  --gradient-warm: linear-gradient(135deg, #f5af19 0%, #f12711 100%);

  /* Colors */
  --bg-primary: #0c0e1a;
  --bg-secondary: #131726;
  --bg-card: rgba(22, 27, 45, 0.7);
  --bg-input: rgba(35, 42, 65, 0.6);
  --bg-hover: rgba(45, 55, 80, 0.5);
  --text-primary: #e8ecf5;
  --text-secondary: #8b92a8;
  --text-muted: #5a6178;
  --accent: #7c6cf0;
  --accent-hover: #8f82f5;
  --accent-glow: rgba(124, 108, 240, 0.3);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #fb7185;
  --border: rgba(255, 255, 255, 0.06);
  --border-focus: rgba(124, 108, 240, 0.5);

  /* Glass */
  --glass-bg: rgba(22, 27, 45, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;

  /* Spacing */
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(124, 108, 240, 0.15);
  --shadow-btn-glow: 0 4px 24px rgba(124, 108, 240, 0.35);

  /* Transitions */
  --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset & Base ─────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gradient-bg);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated background orbs */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.12;
  z-index: -1;
  pointer-events: none;
  animation: orbFloat 20s ease-in-out infinite alternate;
}

body::before {
  width: 600px;
  height: 600px;
  background: var(--gradient-primary);
  top: -200px;
  right: -200px;
}

body::after {
  width: 500px;
  height: 500px;
  background: var(--gradient-accent);
  bottom: -150px;
  left: -150px;
  animation-delay: -10s;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

/* ── Layout ───────────────────────────────────────────────────────── */
.container {
  max-width: 940px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-center {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

/* ── Glass Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card-sm {
  max-width: 420px;
  width: 100%;
}

/* ── Typography ───────────────────────────────────────────────────── */
h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 1.75rem;
}

h2 {
  font-size: 1.35rem;
}

h3 {
  font-size: 1.1rem;
}

.logo {
  font-size: 1.6rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  filter: drop-shadow(0 0 12px rgba(124, 108, 240, 0.3));
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 6px;
}

/* ── Forms ────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}

input,
select,
textarea {
  width: 100%;
  padding: 11px 16px;
  background: var(--bg-input);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow), 0 0 20px rgba(124, 108, 240, 0.1);
  background: rgba(40, 48, 75, 0.7);
}

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

textarea {
  resize: vertical;
  min-height: 100px;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(255, 255, 255, 0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 2px 12px rgba(124, 108, 240, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-glow);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #fb7185, #e11d48);
  color: #fff;
}

.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(251, 113, 133, 0.3);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8rem;
  border-radius: 8px;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ── Navbar ───────────────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-user {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── Tabs ─────────────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(20, 25, 42, 0.6);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  padding: 9px 16px;
  background: transparent;
  border: none;
  border-radius: 10px;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  position: relative;
}

.tab.active {
  background: var(--gradient-btn);
  color: #fff;
  box-shadow: 0 2px 12px rgba(124, 108, 240, 0.3);
}

.tab:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(124, 108, 240, 0.1);
}

/* ── Chat ─────────────────────────────────────────────────────────── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 57px);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.message {
  max-width: 75%;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  font-size: 0.94rem;
  line-height: 1.55;
  animation: messageIn 0.4s var(--transition-bounce) backwards;
  position: relative;
}

.message-user {
  align-self: flex-end;
  background: var(--gradient-btn);
  color: #fff;
  border-bottom-right-radius: 5px;
  box-shadow: 0 2px 12px rgba(124, 108, 240, 0.2);
}

.message-assistant {
  align-self: flex-start;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-bottom-left-radius: 5px;
  box-shadow: var(--shadow-sm);
}

/* ── Markdown in messages ──────────────────────────────────────────── */
.message-assistant p {
  margin: 0 0 8px 0;
}

.message-assistant p:last-child {
  margin-bottom: 0;
}

.message-assistant strong {
  color: #c4b5fd;
}

.message-assistant code {
  background: rgba(124, 108, 240, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.86em;
}

.message-assistant pre {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-assistant pre code {
  background: none;
  padding: 0;
  font-size: 0.85em;
  color: #d4d4d8;
}

.message-assistant ul,
.message-assistant ol {
  margin: 6px 0;
  padding-left: 20px;
}

.message-assistant li {
  margin-bottom: 3px;
}

.message-assistant blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 12px;
  margin: 8px 0;
  color: var(--text-secondary);
  background: rgba(124, 108, 240, 0.05);
  border-radius: 0 6px 6px 0;
}

.message-assistant h1,
.message-assistant h2,
.message-assistant h3 {
  margin: 10px 0 6px 0;
  font-size: 1em;
  color: #e0d4ff;
}

.message-assistant hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 10px 0;
}

.message-assistant table {
  margin: 8px 0;
  font-size: 0.85em;
}

.message-assistant a {
  color: var(--accent-hover);
  text-decoration: underline;
  text-decoration-style: dotted;
}

.chat-input-bar {
  display: flex;
  gap: 10px;
  padding: 16px 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
}

.chat-input-bar input {
  flex: 1;
}

.voice-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg-input);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.voice-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  transform: scale(1.05);
}

.voice-btn.recording {
  background: linear-gradient(135deg, #fb7185, #e11d48);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 0 0 rgba(251, 113, 133, 0.5);
  animation: recordPulse 1.8s infinite;
}

/* ── Tables ───────────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

tr {
  transition: background var(--transition);
}

tr:hover td {
  background: rgba(124, 108, 240, 0.04);
}

/* ── Badge ────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-global {
  background: rgba(124, 108, 240, 0.15);
  color: #a99bff;
}

.badge-personal {
  background: rgba(52, 211, 153, 0.15);
  color: #6ee7b7;
}

.badge-homework {
  background: rgba(251, 191, 36, 0.15);
  color: #fcd34d;
}

/* ── Modal ────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  padding: 20px;
  animation: fadeIn 0.25s ease;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 30px;
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(124, 108, 240, 0.08);
  animation: modalIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal h2 {
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ── Toast ────────────────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  animation: toastIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
}

.toast-success {
  background: linear-gradient(135deg, rgba(52, 211, 153, 0.9), rgba(16, 185, 129, 0.9));
  color: #0c2a1c;
}

.toast-error {
  background: linear-gradient(135deg, rgba(251, 113, 133, 0.9), rgba(225, 29, 72, 0.9));
  color: #fff;
}

/* ── Animations ───────────────────────────────────────────────────── */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(24px) scale(0.9);
  }

  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes recordPulse {
  0% {
    box-shadow: 0 0 0 0 rgba(251, 113, 133, 0.5);
  }

  50% {
    box-shadow: 0 0 0 14px rgba(251, 113, 133, 0);
  }

  100% {
    box-shadow: 0 0 0 0 rgba(251, 113, 133, 0);
  }
}

@keyframes orbFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(-40px, 30px) scale(1.1);
  }

  100% {
    transform: translate(20px, -20px) scale(0.95);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .card {
    padding: 24px;
  }

  .chat-messages {
    padding: 16px;
  }

  .chat-input-bar {
    padding: 12px 16px;
  }

  .message {
    max-width: 88%;
  }

  .navbar {
    padding: 12px 16px;
  }

  .modal {
    padding: 22px;
  }

  table {
    font-size: 0.8rem;
  }

  th,
  td {
    padding: 10px 12px;
  }

  .logo {
    font-size: 1.3rem;
  }

  body::before,
  body::after {
    display: none;
  }

  .hide-mobile {
    display: none !important;
  }
}

/* ── Utilities ────────────────────────────────────────────────────── */
.mt-8 {
  margin-top: 8px;
}

.mt-16 {
  margin-top: 16px;
}

.mt-24 {
  margin-top: 24px;
}

.mb-8 {
  margin-bottom: 8px;
}

.mb-16 {
  margin-bottom: 16px;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--text-muted);
}

.text-sm {
  font-size: 0.85rem;
}

.flex {
  display: flex;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gap-8 {
  gap: 8px;
}

.gap-16 {
  gap: 16px;
}

.hidden {
  display: none !important;
}

/* ── Scrollbar ────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(124, 108, 240, 0.2);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(124, 108, 240, 0.4);
}

/* ── Voice status & indicators ────────────────────────────────────── */
.voice-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--danger);
  font-weight: 500;
}

.voice-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  animation: recordPulse 1.5s infinite;
}

/* ── Empty state ──────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

/* ── Loading spinner ──────────────────────────────────────────────── */
.spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

/* ── Selection highlight ──────────────────────────────────────────── */
::selection {
  background: rgba(124, 108, 240, 0.35);
  color: #fff;
}