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

:root {
  --ipsilon-purple:  #951B81;
  --ipsilon-purple2: #A34194;
  --ipsilon-orange:  #F29201;
  --loreal-black:    #1A1A1A;
  --loreal-gold:     #C8A951;

  --white:      #ffffff;
  --gray-50:    #fafafa;
  --gray-100:   #f4f4f4;
  --gray-200:   #e8e8e8;
  --gray-400:   #a0a0a0;
  --gray-600:   #5a5a5a;
  --gray-700:   #383838;

  --radius:     8px;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.10);
  --shadow-md:  0 4px 16px rgba(0,0,0,.12);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.16);
}

html, body {
  height: 100%;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  color: var(--loreal-black);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; border-radius: 4px; border: none;
  font-size: 13px; font-weight: 600; letter-spacing: .03em;
  cursor: pointer; transition: all .2s; text-decoration: none;
  text-transform: uppercase;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary  { background: var(--ipsilon-purple); color: var(--white); }
.btn-primary:hover:not(:disabled) { background: var(--ipsilon-purple2); }
.btn-success  { background: var(--loreal-black); color: var(--loreal-gold); border: 1px solid var(--loreal-gold); }
.btn-success:hover:not(:disabled) { background: var(--loreal-gold); color: var(--loreal-black); }
.btn-ghost    { background: transparent; color: var(--gray-600); border: 1px solid var(--gray-200); text-transform: none; font-weight: 400; }
.btn-ghost:hover:not(:disabled) { background: var(--gray-100); }
.btn-full     { width: 100%; justify-content: center; }
.btn-sm       { padding: 5px 14px; font-size: 12px; }

/* ── Login page ── */
.login-page {
  display: flex; align-items: stretch; min-height: 100vh;
  background: var(--loreal-black);
}

.login-left {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  background: var(--loreal-black);
  padding: 48px;
  position: relative;
  overflow: hidden;
}

.login-left::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(149,27,129,.15) 0%, rgba(242,146,1,.08) 100%);
}

.login-brand {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 32px;
}

.login-brand-logos {
  display: flex; align-items: center; gap: 32px;
}

.login-brand-sep {
  width: 1px; height: 48px; background: rgba(255,255,255,.2);
}

.login-tagline {
  color: rgba(255,255,255,.5);
  font-size: 12px; letter-spacing: .12em; text-transform: uppercase;
  text-align: center;
}

.login-right {
  width: 440px; display: flex; align-items: center; justify-content: center;
  background: var(--white); padding: 64px 48px;
  box-shadow: -8px 0 32px rgba(0,0,0,.2);
}

.login-card { width: 100%; }
.login-card h2 {
  font-size: 22px; font-weight: 700; color: var(--loreal-black);
  margin-bottom: 6px; letter-spacing: -.01em;
}
.login-card .login-sub {
  font-size: 13px; color: var(--gray-600); margin-bottom: 32px;
}

.login-form .field { margin-bottom: 18px; }
.login-form label {
  display: block; font-size: 11px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--gray-600); margin-bottom: 7px;
}
.login-form input {
  width: 100%; padding: 11px 14px; border: 1px solid var(--gray-200);
  border-radius: 4px; font-size: 14px; outline: none;
  transition: border-color .2s, box-shadow .2s; color: var(--loreal-black);
}
.login-form input:focus {
  border-color: var(--ipsilon-purple);
  box-shadow: 0 0 0 3px rgba(149,27,129,.12);
}
.login-form .btn { margin-top: 8px; padding: 13px 20px; font-size: 13px; }

.alert { padding: 10px 14px; border-radius: 4px; font-size: 13px; margin-bottom: 20px; }
.alert-error { background: #fdf2fb; color: var(--ipsilon-purple); border: 1px solid rgba(149,27,129,.2); }

@media (max-width: 768px) {
  .login-left { display: none; }
  .login-right { width: 100%; }
}

/* ── Topbar ── */
.topbar {
  background: var(--white);
  border-bottom: 2px solid var(--ipsilon-purple);
  position: sticky; top: 0; z-index: 100;
}
.topbar-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; justify-content: space-between;
}
.topbar-brand { display: flex; align-items: center; gap: 24px; }
.topbar-brand-logos { display: flex; align-items: center; gap: 20px; }
.topbar-sep { width: 1px; height: 30px; background: rgba(255,255,255,.2); }
.topbar-title {
  font-size: 12px; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--gray-400);
}
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.user-badge {
  font-size: 12px; color: var(--gray-600);
  background: var(--gray-100); padding: 4px 12px;
  border-radius: 20px; letter-spacing: .04em;
}
.topbar .btn-ghost {
  color: var(--gray-600); border-color: var(--gray-200); text-transform: none;
}
.topbar .btn-ghost:hover { background: var(--gray-100); color: var(--loreal-black); }

/* ── Main layout ── */
.main-layout {
  max-width: 1400px; margin: 0 auto; padding: 28px 24px;
  display: grid; grid-template-columns: 380px 1fr; gap: 20px; align-items: start;
}
@media (max-width: 960px) { .main-layout { grid-template-columns: 1fr; } }

/* ── Panels ── */
.panel {
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm);
}
.panel-title {
  font-size: 13px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--loreal-black); margin-bottom: 6px;
}
.panel-title-bar {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px;
}
.panel-title-bar .panel-title { margin-bottom: 0; }
.panel-hint { font-size: 12px; color: var(--gray-600); margin-bottom: 14px; line-height: 1.6; }
.panel-hint code {
  background: var(--gray-100); padding: 1px 5px; border-radius: 3px;
  font-size: 11px; color: var(--ipsilon-purple);
}

/* ── Accent bar on panels ── */
.panel-accent { border-top: 3px solid var(--ipsilon-purple); }

/* ── Input ── */
.patent-textarea {
  width: 100%; border: 1px solid var(--gray-200); border-radius: 4px;
  padding: 10px 12px; font-family: 'Courier New', monospace; font-size: 12px;
  resize: vertical; outline: none; line-height: 1.7; color: var(--loreal-black);
  transition: border-color .2s, box-shadow .2s;
}
.patent-textarea:focus {
  border-color: var(--ipsilon-purple);
  box-shadow: 0 0 0 3px rgba(149,27,129,.10);
}
.input-actions { display: flex; gap: 8px; margin-top: 14px; }

/* ── Progress ── */
.progress-area { margin-top: 16px; }
.progress-bar { height: 3px; background: var(--gray-100); border-radius: 99px; overflow: hidden; }
.progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--ipsilon-purple), var(--ipsilon-orange));
  border-radius: 99px; transition: width .4s ease;
}
.progress-text { font-size: 12px; color: var(--gray-600); margin-top: 8px; }

/* ── Empty state ── */
.empty-state {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 12px; padding: 60px 24px; color: var(--gray-400);
  text-align: center;
}
.empty-state p { font-size: 13px; color: var(--gray-600); }

/* ── Patent cards ── */
.patent-card {
  border: 1px solid var(--gray-200); border-radius: var(--radius);
  margin-bottom: 16px; overflow: hidden;
}
.patent-card:last-child { margin-bottom: 0; }

.patent-card-header {
  background: var(--loreal-black); padding: 14px 18px;
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  border-left: 4px solid var(--ipsilon-orange);
}
.patent-card-header h3 {
  font-size: 14px; font-weight: 700; color: var(--white); letter-spacing: .02em;
}
.patent-card-header .patent-title {
  font-size: 12px; color: rgba(255,255,255,.55); margin-top: 3px; line-height: 1.4;
}
.patent-card-header a {
  font-size: 11px; color: var(--ipsilon-orange); text-decoration: none;
  white-space: nowrap; letter-spacing: .03em; font-weight: 500;
  flex-shrink: 0; margin-top: 2px;
}
.patent-card-header a:hover { text-decoration: underline; }

.patent-card-body { padding: 18px; }

.claims-section h4 {
  font-size: 10px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ipsilon-purple);
  margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}
.claims-section h4::after {
  content: ''; flex: 1; height: 1px; background: rgba(149,27,129,.15);
}

.claim-item {
  border-left: 3px solid var(--ipsilon-purple); padding: 10px 14px;
  background: #fdf8fc; border-radius: 0 4px 4px 0; margin-bottom: 10px;
  font-size: 13px; line-height: 1.65; color: var(--gray-700);
}
.claim-item:last-child { margin-bottom: 0; }
.claim-label {
  font-size: 10px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--ipsilon-purple); margin-bottom: 5px;
}

.images-section { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--gray-100); }
.images-section h4 {
  font-size: 10px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ipsilon-orange);
  margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}
.images-section h4::after {
  content: ''; flex: 1; height: 1px; background: rgba(242,146,1,.2);
}

.image-desc {
  background: #fffbf0; border: 1px solid rgba(242,146,1,.25);
  border-radius: 4px; padding: 12px 14px; margin-bottom: 8px;
}
.image-desc-label {
  font-size: 10px; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--ipsilon-orange); margin-bottom: 5px;
}
.image-desc a { font-size: 11px; color: var(--ipsilon-purple); word-break: break-all; }
.image-desc-text { font-size: 13px; line-height: 1.65; color: var(--gray-700); margin-top: 6px; }

.error-card {
  background: #fdf2fb; border: 1px solid rgba(149,27,129,.2);
  border-radius: 4px; padding: 12px 16px; margin-bottom: 12px;
  font-size: 13px; color: var(--ipsilon-purple);
}
.error-card strong { display: block; margin-bottom: 4px; font-size: 12px; letter-spacing: .04em; }

/* ── Spinner ── */
.spinner {
  width: 14px; height: 14px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid rgba(255,255,255,.3); border-top-color: #fff;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hidden { display: none !important; }