frontend/src/index.css

/* ═══════════════════════════════════════════════════════════════════════════
   Portfolio Assistant - Dark Theme with Animated Stars
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-tertiary: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --border: #2a2a2a;
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
}

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

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

/* ═══════════════════════════════════════════════════════════════════════════
   Animated Star Background
   ═══════════════════════════════════════════════════════════════════════════ */

.star-field {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.star {
  position: absolute;
  background: white;
  border-radius: 50%;
  animation: twinkle var(--duration, 3s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
  opacity: 0;
  width: var(--size, 2px);
  height: var(--size, 2px);
}

@keyframes twinkle {

  0%,
  100% {
    opacity: 0;
    transform: scale(0.5);
  }

  50% {
    opacity: var(--opacity, 0.8);
    transform: scale(1);
  }
}

/* Generate 100 stars with random positions using nth-child */
.star:nth-child(1) {
  left: 2%;
  top: 5%;
  --duration: 3s;
  --opacity: 0.9;
  --delay: 0.1s;
  --size: 2px;
}

.star:nth-child(2) {
  left: 8%;
  top: 15%;
  --duration: 4s;
  --opacity: 0.7;
  --delay: 0.5s;
  --size: 1px;
}

.star:nth-child(3) {
  left: 12%;
  top: 8%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 1s;
  --size: 3px;
}

.star:nth-child(4) {
  left: 18%;
  top: 25%;
  --duration: 5s;
  --opacity: 0.6;
  --delay: 0.3s;
  --size: 2px;
}

.star:nth-child(5) {
  left: 25%;
  top: 12%;
  --duration: 4.5s;
  --opacity: 0.9;
  --delay: 1.5s;
  --size: 1px;
}

.star:nth-child(6) {
  left: 32%;
  top: 35%;
  --duration: 3s;
  --opacity: 0.7;
  --delay: 2s;
  --size: 2px;
}

.star:nth-child(7) {
  left: 38%;
  top: 18%;
  --duration: 4s;
  --opacity: 0.8;
  --delay: 0.8s;
  --size: 3px;
}

.star:nth-child(8) {
  left: 45%;
  top: 42%;
  --duration: 5s;
  --opacity: 0.6;
  --delay: 1.2s;
  --size: 1px;
}

.star:nth-child(9) {
  left: 52%;
  top: 28%;
  --duration: 3.5s;
  --opacity: 0.9;
  --delay: 0.1s;
  --size: 2px;
}

.star:nth-child(10) {
  left: 58%;
  top: 8%;
  --duration: 4.5s;
  --opacity: 0.7;
  --delay: 2.5s;
  --size: 2px;
}

.star:nth-child(11) {
  left: 65%;
  top: 48%;
  --duration: 3s;
  --opacity: 0.8;
  --delay: 0.4s;
  --size: 1px;
}

.star:nth-child(12) {
  left: 72%;
  top: 22%;
  --duration: 4s;
  --opacity: 0.6;
  --delay: 1.8s;
  --size: 3px;
}

.star:nth-child(13) {
  left: 78%;
  top: 55%;
  --duration: 5s;
  --opacity: 0.9;
  --delay: 0.9s;
  --size: 2px;
}

.star:nth-child(14) {
  left: 85%;
  top: 32%;
  --duration: 3.5s;
  --opacity: 0.7;
  --delay: 2.2s;
  --size: 1px;
}

.star:nth-child(15) {
  left: 92%;
  top: 15%;
  --duration: 4.5s;
  --opacity: 0.8;
  --delay: 0.6s;
  --size: 2px;
}

.star:nth-child(16) {
  left: 5%;
  top: 62%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 1.4s;
  --size: 3px;
}

.star:nth-child(17) {
  left: 15%;
  top: 45%;
  --duration: 4s;
  --opacity: 0.9;
  --delay: 0.2s;
  --size: 1px;
}

.star:nth-child(18) {
  left: 22%;
  top: 72%;
  --duration: 5s;
  --opacity: 0.7;
  --delay: 1.6s;
  --size: 2px;
}

.star:nth-child(19) {
  left: 28%;
  top: 58%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 2.8s;
  --size: 2px;
}

.star:nth-child(20) {
  left: 35%;
  top: 82%;
  --duration: 4.5s;
  --opacity: 0.6;
  --delay: 0.7s;
  --size: 1px;
}

.star:nth-child(21) {
  left: 42%;
  top: 65%;
  --duration: 3s;
  --opacity: 0.9;
  --delay: 1.1s;
  --size: 3px;
}

.star:nth-child(22) {
  left: 48%;
  top: 78%;
  --duration: 4s;
  --opacity: 0.7;
  --delay: 2.3s;
  --size: 2px;
}

.star:nth-child(23) {
  left: 55%;
  top: 52%;
  --duration: 5s;
  --opacity: 0.8;
  --delay: 0.05s;
  --size: 1px;
}

.star:nth-child(24) {
  left: 62%;
  top: 88%;
  --duration: 3.5s;
  --opacity: 0.6;
  --delay: 1.9s;
  --size: 2px;
}

.star:nth-child(25) {
  left: 68%;
  top: 68%;
  --duration: 4.5s;
  --opacity: 0.9;
  --delay: 2.6s;
  --size: 3px;
}

.star:nth-child(26) {
  left: 75%;
  top: 75%;
  --duration: 3s;
  --opacity: 0.7;
  --delay: 0.15s;
  --size: 1px;
}

.star:nth-child(27) {
  left: 82%;
  top: 62%;
  --duration: 4s;
  --opacity: 0.8;
  --delay: 1.3s;
  --size: 2px;
}

.star:nth-child(28) {
  left: 88%;
  top: 85%;
  --duration: 5s;
  --opacity: 0.6;
  --delay: 2.1s;
  --size: 2px;
}

.star:nth-child(29) {
  left: 95%;
  top: 72%;
  --duration: 3.5s;
  --opacity: 0.9;
  --delay: 0.85s;
  --size: 1px;
}

.star:nth-child(30) {
  left: 3%;
  top: 92%;
  --duration: 4.5s;
  --opacity: 0.7;
  --delay: 1.7s;
  --size: 3px;
}

.star:nth-child(31) {
  left: 10%;
  top: 38%;
  --duration: 3s;
  --opacity: 0.8;
  --delay: 0.3s;
  --size: 2px;
}

.star:nth-child(32) {
  left: 17%;
  top: 85%;
  --duration: 4s;
  --opacity: 0.6;
  --delay: 2.4s;
  --size: 1px;
}

.star:nth-child(33) {
  left: 24%;
  top: 52%;
  --duration: 5s;
  --opacity: 0.9;
  --delay: 0.55s;
  --size: 2px;
}

.star:nth-child(34) {
  left: 31%;
  top: 92%;
  --duration: 3.5s;
  --opacity: 0.7;
  --delay: 1.25s;
  --size: 3px;
}

.star:nth-child(35) {
  left: 37%;
  top: 28%;
  --duration: 4.5s;
  --opacity: 0.8;
  --delay: 2.7s;
  --size: 1px;
}

.star:nth-child(36) {
  left: 44%;
  top: 95%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 0.45s;
  --size: 2px;
}

.star:nth-child(37) {
  left: 51%;
  top: 38%;
  --duration: 4s;
  --opacity: 0.9;
  --delay: 1.55s;
  --size: 2px;
}

.star:nth-child(38) {
  left: 57%;
  top: 72%;
  --duration: 5s;
  --opacity: 0.7;
  --delay: 2.15s;
  --size: 1px;
}

.star:nth-child(39) {
  left: 64%;
  top: 5%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 0.35s;
  --size: 3px;
}

.star:nth-child(40) {
  left: 71%;
  top: 95%;
  --duration: 4.5s;
  --opacity: 0.6;
  --delay: 1.85s;
  --size: 2px;
}

.star:nth-child(n+41) {
  left: calc(2% + (var(--n, 0) * 2.3%));
  top: calc(5% + (var(--n, 0) * 1.8%));
  --duration: 3.5s;
  --opacity: 0.7;
}

.star:nth-child(41) {
  --n: 1;
  left: 4%;
  top: 18%;
}

.star:nth-child(42) {
  --n: 2;
  left: 9%;
  top: 32%;
}

.star:nth-child(43) {
  --n: 3;
  left: 14%;
  top: 48%;
}

.star:nth-child(44) {
  --n: 4;
  left: 19%;
  top: 62%;
}

.star:nth-child(45) {
  --n: 5;
  left: 24%;
  top: 78%;
}

.star:nth-child(46) {
  --n: 6;
  left: 29%;
  top: 12%;
}

.star:nth-child(47) {
  --n: 7;
  left: 34%;
  top: 28%;
}

.star:nth-child(48) {
  --n: 8;
  left: 39%;
  top: 42%;
}

.star:nth-child(49) {
  --n: 9;
  left: 44%;
  top: 58%;
}

.star:nth-child(50) {
  --n: 10;
  left: 49%;
  top: 72%;
}

.star:nth-child(51) {
  left: 54%;
  top: 88%;
  --duration: 4s;
  --opacity: 0.8;
  --delay: 0.5s;
}

.star:nth-child(52) {
  left: 59%;
  top: 22%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 1.2s;
}

.star:nth-child(53) {
  left: 64%;
  top: 38%;
  --duration: 5s;
  --opacity: 0.9;
  --delay: 2s;
}

.star:nth-child(54) {
  left: 69%;
  top: 52%;
  --duration: 3.5s;
  --opacity: 0.7;
  --delay: 0.8s;
}

.star:nth-child(55) {
  left: 74%;
  top: 68%;
  --duration: 4.5s;
  --opacity: 0.8;
  --delay: 1.5s;
}

.star:nth-child(56) {
  left: 79%;
  top: 82%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 2.3s;
}

.star:nth-child(57) {
  left: 84%;
  top: 18%;
  --duration: 4s;
  --opacity: 0.9;
  --delay: 0.3s;
}

.star:nth-child(58) {
  left: 89%;
  top: 32%;
  --duration: 5s;
  --opacity: 0.7;
  --delay: 1.8s;
}

.star:nth-child(59) {
  left: 94%;
  top: 48%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 2.6s;
}

.star:nth-child(60) {
  left: 99%;
  top: 62%;
  --duration: 4.5s;
  --opacity: 0.6;
  --delay: 0.9s;
}

.star:nth-child(61) {
  left: 6%;
  top: 75%;
  --duration: 3s;
  --opacity: 0.9;
  --delay: 1.6s;
  --size: 3px;
}

.star:nth-child(62) {
  left: 11%;
  top: 88%;
  --duration: 4s;
  --opacity: 0.7;
  --delay: 2.4s;
}

.star:nth-child(63) {
  left: 16%;
  top: 2%;
  --duration: 5s;
  --opacity: 0.8;
  --delay: 0.6s;
}

.star:nth-child(64) {
  left: 21%;
  top: 15%;
  --duration: 3.5s;
  --opacity: 0.6;
  --delay: 1.3s;
}

.star:nth-child(65) {
  left: 26%;
  top: 28%;
  --duration: 4.5s;
  --opacity: 0.9;
  --delay: 2.1s;
}

.star:nth-child(66) {
  left: 30%;
  top: 42%;
  --duration: 3s;
  --opacity: 0.7;
  --delay: 0.4s;
  --size: 3px;
}

.star:nth-child(67) {
  left: 36%;
  top: 55%;
  --duration: 4s;
  --opacity: 0.8;
  --delay: 1.1s;
}

.star:nth-child(68) {
  left: 41%;
  top: 68%;
  --duration: 5s;
  --opacity: 0.6;
  --delay: 1.9s;
}

.star:nth-child(69) {
  left: 46%;
  top: 82%;
  --duration: 3.5s;
  --opacity: 0.9;
  --delay: 2.7s;
}

.star:nth-child(70) {
  left: 50%;
  top: 95%;
  --duration: 4.5s;
  --opacity: 0.7;
  --delay: 0.2s;
}

.star:nth-child(71) {
  left: 56%;
  top: 8%;
  --duration: 3s;
  --opacity: 0.8;
  --delay: 0.95s;
  --size: 3px;
}

.star:nth-child(72) {
  left: 60%;
  top: 22%;
  --duration: 4s;
  --opacity: 0.6;
  --delay: 1.65s;
}

.star:nth-child(73) {
  left: 66%;
  top: 35%;
  --duration: 5s;
  --opacity: 0.9;
  --delay: 2.35s;
}

.star:nth-child(74) {
  left: 70%;
  top: 48%;
  --duration: 3.5s;
  --opacity: 0.7;
  --delay: 0.55s;
}

.star:nth-child(75) {
  left: 76%;
  top: 62%;
  --duration: 4.5s;
  --opacity: 0.8;
  --delay: 1.25s;
}

.star:nth-child(76) {
  left: 80%;
  top: 75%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 1.95s;
  --size: 3px;
}

.star:nth-child(77) {
  left: 86%;
  top: 88%;
  --duration: 4s;
  --opacity: 0.9;
  --delay: 2.65s;
}

.star:nth-child(78) {
  left: 90%;
  top: 2%;
  --duration: 5s;
  --opacity: 0.7;
  --delay: 0.35s;
}

.star:nth-child(79) {
  left: 96%;
  top: 15%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 1.05s;
}

.star:nth-child(80) {
  left: 1%;
  top: 28%;
  --duration: 4.5s;
  --opacity: 0.6;
  --delay: 1.75s;
}

.star:nth-child(81) {
  left: 7%;
  top: 42%;
  --duration: 3s;
  --opacity: 0.9;
  --delay: 2.45s;
  --size: 3px;
}

.star:nth-child(82) {
  left: 13%;
  top: 55%;
  --duration: 4s;
  --opacity: 0.7;
  --delay: 0.15s;
}

.star:nth-child(83) {
  left: 18%;
  top: 68%;
  --duration: 5s;
  --opacity: 0.8;
  --delay: 0.85s;
}

.star:nth-child(84) {
  left: 23%;
  top: 82%;
  --duration: 3.5s;
  --opacity: 0.6;
  --delay: 1.55s;
}

.star:nth-child(85) {
  left: 27%;
  top: 95%;
  --duration: 4.5s;
  --opacity: 0.9;
  --delay: 2.25s;
}

.star:nth-child(86) {
  left: 33%;
  top: 8%;
  --duration: 3s;
  --opacity: 0.7;
  --delay: 0.45s;
  --size: 3px;
}

.star:nth-child(87) {
  left: 38%;
  top: 22%;
  --duration: 4s;
  --opacity: 0.8;
  --delay: 1.15s;
}

.star:nth-child(88) {
  left: 43%;
  top: 35%;
  --duration: 5s;
  --opacity: 0.6;
  --delay: 1.85s;
}

.star:nth-child(89) {
  left: 47%;
  top: 48%;
  --duration: 3.5s;
  --opacity: 0.9;
  --delay: 2.55s;
}

.star:nth-child(90) {
  left: 53%;
  top: 62%;
  --duration: 4.5s;
  --opacity: 0.7;
  --delay: 0.25s;
}

.star:nth-child(91) {
  left: 58%;
  top: 75%;
  --duration: 3s;
  --opacity: 0.8;
  --delay: 0.95s;
  --size: 3px;
}

.star:nth-child(92) {
  left: 63%;
  top: 88%;
  --duration: 4s;
  --opacity: 0.6;
  --delay: 1.65s;
}

.star:nth-child(93) {
  left: 67%;
  top: 2%;
  --duration: 5s;
  --opacity: 0.9;
  --delay: 2.35s;
}

.star:nth-child(94) {
  left: 73%;
  top: 15%;
  --duration: 3.5s;
  --opacity: 0.7;
  --delay: 0.55s;
}

.star:nth-child(95) {
  left: 77%;
  top: 28%;
  --duration: 4.5s;
  --opacity: 0.8;
  --delay: 1.25s;
}

.star:nth-child(96) {
  left: 83%;
  top: 42%;
  --duration: 3s;
  --opacity: 0.6;
  --delay: 1.95s;
  --size: 3px;
}

.star:nth-child(97) {
  left: 87%;
  top: 55%;
  --duration: 4s;
  --opacity: 0.9;
  --delay: 2.65s;
}

.star:nth-child(98) {
  left: 93%;
  top: 68%;
  --duration: 5s;
  --opacity: 0.7;
  --delay: 0.35s;
}

.star:nth-child(99) {
  left: 97%;
  top: 82%;
  --duration: 3.5s;
  --opacity: 0.8;
  --delay: 1.05s;
}

.star:nth-child(100) {
  left: 4%;
  top: 95%;
  --duration: 4.5s;
  --opacity: 0.6;
  --delay: 1.75s;
  --size: 3px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Layout
   ═══════════════════════════════════════════════════════════════════════════ */

.app-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.header {
  text-align: center;
  margin-bottom: 32px;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   File Upload
   ═══════════════════════════════════════════════════════════════════════════ */

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: var(--glass);
  backdrop-filter: blur(10px);
  margin-bottom: 24px;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
}

.upload-zone svg {
  color: var(--text-muted);
  margin-bottom: 12px;
}

.upload-zone p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.upload-zone .formats {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 8px;
}

/* Document List */
.documents {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.doc-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.85rem;
}

.doc-chip .type {
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
}

.doc-chip button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  display: flex;
}

.doc-chip button:hover {
  color: var(--error);
}

/* ═══════════════════════════════════════════════════════════════════════════
   Chat Interface
   ═══════════════════════════════════════════════════════════════════════════ */

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 400px;
  max-height: 500px;
}

.message {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.message.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  border-bottom-right-radius: 4px;
}

.message.assistant {
  align-self: flex-start;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.message.assistant .sources {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.message.assistant .source-chip {
  display: inline-block;
  background: var(--bg-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  margin: 4px 4px 0 0;
  font-size: 0.75rem;
}

.welcome-message {
  text-align: center;
  color: var(--text-secondary);
  padding: 48px 24px;
}

.welcome-message svg {
  color: var(--accent);
  margin-bottom: 16px;
}

/* Chat Input */
.chat-input-container {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.chat-input {
  flex: 1;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
}

.chat-input:focus {
  border-color: var(--accent);
}

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

.send-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border: none;
  border-radius: 12px;
  padding: 12px 20px;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  transition: transform 0.2s, opacity 0.2s;
}

.send-button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.send-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Loading State
   ═══════════════════════════════════════════════════════════════════════════ */

.loading-dots {
  display: flex;
  gap: 4px;
  padding: 8px 0;
}

.loading-dots span {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: bounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {

  0%,
  80%,
  100% {
    transform: scale(0.6);
    opacity: 0.5;
  }

  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   Markdown Content
   ═══════════════════════════════════════════════════════════════════════════ */

.message.assistant p {
  margin-bottom: 0.75em;
}

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

.message.assistant code {
  background: var(--bg-primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
}

.message.assistant pre {
  background: var(--bg-primary);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 12px 0;
}

.message.assistant pre code {
  background: none;
  padding: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   Settings Panel (LLM TestLab style)
   ═══════════════════════════════════════════════════════════════════════════ */

.settings-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 640px) {
  .settings-panel {
    grid-template-columns: 1fr;
  }
}

.settings-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 16px;
  backdrop-filter: blur(10px);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.form-select,
.form-input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
}

.form-select:focus,
.form-input:focus {
  border-color: var(--accent);
}

.form-input.error {
  border-color: var(--error);
}

.form-group {
  margin-top: 12px;
}

.form-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.model-count {
  color: var(--text-muted);
  font-weight: 400;
}

.spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 500;
  margin-left: auto;
}

.status-badge.success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.status-text {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.status-text.success {
  color: var(--success);
}

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

.test-connection-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  margin-top: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.test-connection-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.1);
}

.test-connection-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.api-key-link {
  display: block;
  font-size: 0.75rem;
  color: var(--accent-light);
  margin-top: 12px;
  text-decoration: none;
}

.api-key-link:hover {
  text-decoration: underline;
}

.api-key-input:focus {
  border-color: var(--accent);
}

.api-key-section label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  white-space: nowrap;
}

.provider-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  min-width: 140px;
}

.provider-select:focus {
  border-color: var(--accent);
}

.provider-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 640px) {
  .app-container {
    padding: 16px;
  }

  .header h1 {
    font-size: 1.5rem;
  }

  .message {
    max-width: 90%;
  }

  .upload-zone {
    padding: 24px 16px;
  }
}