:root {
  --vh: 1vh;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  min-height: calc(var(--vh, 1vh) * 100);
  background: radial-gradient(circle at top, rgba(255,255,255,0.08), transparent 35%),
    linear-gradient(180deg, #07080b 0%, #0f1116 45%, #13171f 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  overflow-x: hidden;
  color: #f5f5f7;
}

.container {
  backdrop-filter: blur(24px);
  background: rgba(20, 24, 33, 0.88);
  border-radius: 28px;
  padding: 30px 20px;
  width: min(100%, 460px);
  max-width: 460px;
  color: #f5f5f7;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
  text-align: center;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
  margin: auto;
}

.logo-container {
  text-align: center;
  margin-bottom: 20px;
  padding: 10px;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.logo-container:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
}

.logo-container img {
  max-width: 180px;
  max-height: 48px;
  object-fit: contain;
  height: auto;
  filter: grayscale(0.35) brightness(0.95);
}

.main-icon {
  margin-bottom: 20px;
}

.main-icon .icon {
  width: 80px;
  height: 80px;
  margin: 0 auto;
  background: rgba(84, 124, 224, 0.16);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: #72b5ff;
  transition: transform 0.3s ease;
  box-shadow: 0 18px 50px rgba(84, 124, 224, 0.18);
}

.main-icon .icon:hover {
  transform: scale(1.05);
}

h1 {
  font-size: clamp(22px, 5vw, 26px);
  margin-bottom: 10px;
  color: #fff;
  font-weight: 600;
}

.subtitle {
  font-size: clamp(14px, 4vw, 16px);
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.72);
  font-weight: 400;
  line-height: 1.5;
}

.input-group {
  margin-bottom: 25px;
  text-align: left;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  color: #ddd;
  font-size: clamp(13px, 3.5vw, 14px);
  font-weight: 500;
}

.input-group input {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  color: #f5f5f7;
  outline: none;
  transition: all 0.3s ease;
  font-size: clamp(14px, 3.5vw, 15px);
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
}

.input-group input:focus {
  border-color: rgba(114, 181, 255, 0.8);
  box-shadow: 0 0 0 4px rgba(114, 181, 255, 0.12);
  background: rgba(255, 255, 255, 0.1);
}

.input-group input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

button {
  width: 100%;
  padding: 16px 20px;
  background: linear-gradient(180deg, #0a84ff 0%, #0071f3 100%);
  border: none;
  border-radius: 16px;
  color: white;
  font-size: clamp(14px, 3.5vw, 16px);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 34px rgba(10, 132, 255, 0.28);
  margin-bottom: 15px;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.secondary-button {
  width: 100%;
  padding: 14px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  color: #f5f5f7;
  font-size: clamp(14px, 3.5vw, 15px);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
  margin-bottom: 20px;
  display: none;
  min-height: 48px;
  line-height: 1.1;
}

.secondary-button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

button:hover:not(:disabled) {
  background: linear-gradient(180deg, #0e77f0 0%, #0063d7 100%);
  transform: translateY(-1px);
  box-shadow: 0 18px 38px rgba(10, 132, 255, 0.28);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(106, 17, 203, 0.3);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.7;
  transform: none;
}

.loader {
  display: none;
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.14);
  border-top: 3px solid #72b5ff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

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

.status-indicator {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 10px;
  animation: pulse 2s infinite;
  flex-shrink: 0;
}

.status-indicator.generating { background-color: #72b5ff; }
.status-indicator.waiting { background-color: #5ac8fa; }
.status-indicator.connected { background-color: #4CAF50; }
.status-indicator.error { background-color: #f44336; }

.status-message {
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(13px, 3.5vw, 14px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 26px;
  text-align: center;
}

.status-message span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.qr-section {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.qr-section.show {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

#qrcode {
  margin: 20px 0;
  padding: 14px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

#qrcode img {
  max-width: 92%;
  max-height: calc(var(--vh, 1vh) * 40);
  height: auto;
  width: auto;
  border-radius: 14px;
  background: rgba(250, 250, 255, 0.08);
  padding: 10px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.22);
  object-fit: contain;
}

#qrcode.empty {
  color: rgba(255, 255, 255, 0.68);
  font-style: italic;
  font-size: clamp(13px, 3vw, 14px);
}

#timer {
  margin-top: 15px;
  font-weight: 600;
  color: #c7e0ff;
  font-size: clamp(13px, 3vw, 14px);
  padding: 12px;
  background: rgba(114, 181, 255, 0.12);
  border-radius: 12px;
  border: 1px solid rgba(114, 181, 255, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.initial-instructions {
  margin: 20px 0;
  padding: 22px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(13px, 3.5vw, 14px);
  line-height: 1.6;
}

.initial-instructions .icon {
  font-size: 24px;
  margin-bottom: 10px;
  display: block;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-animation {
  to { transform: scale(4); opacity: 0; }
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.slide-in {
  animation: slideInUp 0.5s ease-out;
}

/* Pequenos ajustes para telas realmente pequenas (<= 360px) */
@media (max-width: 360px) {
  .container { padding: 20px 15px; }
  .main-icon .icon {
    width: 64px;
    height: 64px;
    font-size: 28px;
  }
  .logo-container img { max-height: 40px; }
  button {
    padding: 12px 16px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .status-indicator { animation: none; }
  .loader {
    animation: none;
    border: 3px solid #66aaff;
  }
  .qr-section { transition: none; }
}

@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(135deg, #0a0a0a, #1a1a2e, #16213e);
  }
}

@media (hover: hover) {
  .container:hover {
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
  }
}

@media (hover: none) {
  button:hover {
    transform: none;
    background: linear-gradient(45deg, #6a11cb, #2575fc);
  }
  .main-icon .icon:hover {
    transform: none;
  }
}