* {
  box-sizing: border-box;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { 
    opacity: 1;
    transform: scale(1);
  }
  50% { 
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes glow {
  0%, 100% {
    filter: drop-shadow(0 0 20px rgba(20, 184, 166, 0.8)) drop-shadow(0 0 40px rgba(20, 184, 166, 0.6));
  }
  50% {
    filter: drop-shadow(0 0 30px rgba(20, 184, 166, 1)) drop-shadow(0 0 60px rgba(20, 184, 166, 0.8)) drop-shadow(0 0 90px rgba(20, 184, 166, 0.5));
  }
}

@keyframes colorShift {
  0% {
    stroke: #ef4444;
    filter: drop-shadow(0 0 20px rgba(239, 68, 68, 0.8)) drop-shadow(0 0 40px rgba(239, 68, 68, 0.6));
  }
  16.66% {
    stroke: #f97316;
    filter: drop-shadow(0 0 20px rgba(249, 115, 22, 0.8)) drop-shadow(0 0 40px rgba(249, 115, 22, 0.6));
  }
  33.33% {
    stroke: #eab308;
    filter: drop-shadow(0 0 20px rgba(234, 179, 8, 0.8)) drop-shadow(0 0 40px rgba(234, 179, 8, 0.6));
  }
  50% {
    stroke: #22c55e;
    filter: drop-shadow(0 0 20px rgba(34, 197, 94, 0.8)) drop-shadow(0 0 40px rgba(34, 197, 94, 0.6));
  }
  66.66% {
    stroke: #14b8a6;
    filter: drop-shadow(0 0 20px rgba(20, 184, 166, 0.8)) drop-shadow(0 0 40px rgba(20, 184, 166, 0.6));
  }
  83.33% {
    stroke: #8b5cf6;
    filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.8)) drop-shadow(0 0 40px rgba(139, 92, 246, 0.6));
  }
  100% {
    stroke: #ef4444;
    filter: drop-shadow(0 0 20px rgba(239, 68, 68, 0.8)) drop-shadow(0 0 40px rgba(239, 68, 68, 0.6));
  }
}

@keyframes buttonPulse {
  0%, 100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(0.98);
    filter: brightness(0.9);
  }
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 40px 16px;
}

.page {
  width: min(800px, 100%);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

header {
  text-align: center;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2rem, 6vw, 3rem);
  color: #f0f6ff;
}

.tagline {
  margin: 0;
  color: #94a3b8;
}

.role-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.role-button {
  background: #1e293b;
  border: 1px solid #475569;
  border-radius: 999px;
  color: inherit;
  padding: 12px 20px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.role-button.active,
.role-button:hover {
  background: #334155;
  border-color: #94a3b8;
}

.view {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hidden {
  display: none !important;
}

.hint {
  margin: 0;
  color: #cbd5f5;
  font-size: 0.95rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.95rem;
}

.field span {
  color: #e2e8f0;
  font-weight: 600;
}

textarea {
  resize: vertical;
  min-height: 80px;
  padding: 12px;
  font-family: inherit;
  font-size: 1rem;
  background: #0f172a;
  color: inherit;
  border: 1px solid #334155;
  border-radius: 10px;
}

textarea:focus {
  outline: 2px solid #38bdf8;
}

.big-button {
  border: none;
  border-radius: 999px;
  padding: 22px 36px;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 700;
  cursor: pointer;
  color: #0f172a;
  background: linear-gradient(135deg, #f87171, #ef4444);
  box-shadow: 0 12px 30px rgba(248, 113, 113, 0.4);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.big-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 35px rgba(248, 113, 113, 0.5);
}

.big-button:active {
  transform: translateY(2px);
  box-shadow: 0 8px 20px rgba(248, 113, 113, 0.3);
}

.big-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
  box-shadow: 0 6px 14px rgba(148, 163, 184, 0.2);
}

.big-button.green {
  background: linear-gradient(135deg, #34d399, #10b981);
  box-shadow: 0 12px 30px rgba(52, 211, 153, 0.4);
  color: #022c22;
}

.outline-button {
  border-radius: 999px;
  border: 1px solid #64748b;
  background: transparent;
  color: inherit;
  padding: 12px 20px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.outline-button:hover {
  background: rgba(100, 116, 139, 0.2);
  border-color: #94a3b8;
}

.status-box {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(100, 116, 139, 0.25);
  background: rgba(2, 6, 23, 0.6);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.status-box.alert {
  border-color: rgba(248, 113, 113, 0.5);
  background: rgba(127, 29, 29, 0.35);
}

.status-box.ack {
  border-color: rgba(52, 211, 153, 0.5);
  background: rgba(6, 95, 70, 0.35);
}

.status-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.status-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.status-text p {
  margin: 0;
  color: #cbd5f5;
}

.ack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
  background: rgba(6, 78, 59, 0.4);
  border-radius: 14px;
  border: 1px solid rgba(52, 211, 153, 0.4);
  padding: 18px;
}

.ack-icon {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
}

.alert-card {
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.alert-card.alerting {
  border-color: rgba(248, 113, 113, 0.6);
  background: rgba(127, 29, 29, 0.35);
}

.alert-card.acknowledged {
  border-color: rgba(52, 211, 153, 0.5);
  background: rgba(6, 95, 70, 0.35);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  background: rgba(148, 163, 184, 0.2);
  color: #f8fafc;
}

.badge.alert {
  background: rgba(248, 113, 113, 0.2);
  color: #fecaca;
}

.badge.ack {
  background: rgba(52, 211, 153, 0.2);
  color: #bbf7d0;
}

.timestamp {
  color: #94a3b8;
  font-size: 0.85rem;
}

.incoming {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #e2e8f0;
  font-size: 1.05rem;
}

.ack-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

@media (max-width: 600px) {
  body {
    padding-top: 24px;
    padding-bottom: 32px;
  }

  .view {
    padding: 18px;
  }
}