@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
  --blue: #1a6dd4;
  --blue-light: #3b8df5;
  --amber: #f5a623;
  --amber-light: #ffc857;
  --bg: #060a14;
  --bg-card: rgba(255,255,255,0.03);
  --border: rgba(255,255,255,0.07);
  --text: #e2e8f0;
  --text-muted: #7a8ba8;
  --text-dim: #475569;
  --green: #22c55e;
  --red: #f87171;
}

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

/* ─── Background effects ─── */
.bg-effects {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-effects .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: float 20s ease-in-out infinite;
}

.bg-effects .orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(26,109,212,0.2), transparent 70%);
  top: -150px; left: -80px;
}

.bg-effects .orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(245,166,35,0.1), transparent 70%);
  bottom: -100px; right: -100px;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Grid overlay */
.bg-effects::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ─── Page layout ─── */
.page {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
}

/* ─── Nav ─── */
nav {
  width: 100%;
  max-width: 520px;
  padding: 20px 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  animation: fadeDown 0.5s ease;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-brand {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.signa { color: var(--blue-light); }
.car { color: var(--amber); }

.nav-back {
  padding: 8px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
}

.nav-back:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: 520px;
  padding: 24px 20px;
  flex: 1;
  animation: fadeUp 0.5s ease 0.1s both;
}

/* ─── Header ─── */
header {
  text-align: center;
  margin-bottom: 20px;
}

.page-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

header h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.tagline {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.5;
}

/* ─── Form ─── */
label {
  display: block;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

input[type="text"] {
  width: 100%;
  padding: 14px 16px;
  background: linear-gradient(145deg, rgba(17,24,39,0.8), rgba(13,17,23,0.8));
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text);
  font-family: inherit;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  outline: none;
  transition: all 0.25s;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

input[type="text"]::placeholder {
  color: var(--text-dim);
  font-weight: 500;
  letter-spacing: 1px;
}

input[type="text"]:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(59,141,245,0.12);
}

input[type="text"]:read-only {
  opacity: 0.6;
  cursor: default;
}

/* ─── Alert list ─── */
#alert-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
  max-height: 320px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}

#alert-list::-webkit-scrollbar {
  width: 6px;
}

#alert-list::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
}

.alert-category {
  color: var(--text-dim);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  padding: 6px 0 4px;
  flex-shrink: 0;
}

.alert-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 14px;
  background: linear-gradient(145deg, rgba(17,24,39,0.6), rgba(13,17,23,0.6));
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}

.alert-option:hover {
  border-color: rgba(59,141,245,0.3);
  background: rgba(59,141,245,0.05);
}

.alert-option.selected {
  border-color: var(--blue-light);
  background: rgba(59,141,245,0.1);
  box-shadow: 0 0 0 3px rgba(59,141,245,0.08);
}

.alert-emoji {
  font-size: 22px;
  width: 30px;
  text-align: center;
  flex-shrink: 0;
}

.alert-title {
  font-size: 14px;
  font-weight: 600;
}

/* ─── Send button ─── */
#send-btn {
  width: 100%;
  margin-top: 3px;
  padding: 16px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: #fff;
  border: none;
  border-radius: 16px;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 8px 24px rgba(26,109,212,0.3);
  position: relative;
  overflow: hidden;
}

#send-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.12), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s;
}

#send-btn:not(:disabled):hover::before {
  transform: translateX(100%);
}

#send-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(26,109,212,0.4);
}

#send-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  box-shadow: none;
}

#send-btn.loading {
  opacity: 0.6;
  pointer-events: none;
}

.error {
  color: var(--red);
  font-size: 13px;
  text-align: center;
  margin-top: 14px;
  padding: 10px 16px;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.15);
  border-radius: 10px;
}

.hidden {
  display: none !important;
}

/* ─── Success state ─── */
#success-section {
  text-align: center;
  padding-top: 48px;
  animation: fadeUp 0.5s ease;
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(34,197,94,0.1);
  border: 2px solid rgba(34,197,94,0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--green);
  animation: scaleIn 0.4s ease;
}

@keyframes scaleIn {
  from { transform: scale(0.5); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

#success-section h2 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

#success-section > p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 36px;
}

.download-prompt {
  background: linear-gradient(145deg, rgba(17,24,39,0.8), rgba(13,17,23,0.8));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 16px;
  backdrop-filter: blur(10px);
}

.download-prompt > p {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.store-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text);
  text-decoration: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s;
}

.store-btn:hover {
  background: rgba(26,109,212,0.12);
  border-color: rgba(26,109,212,0.3);
  color: #fff;
  transform: translateY(-1px);
}

#send-another-btn {
  width: 100%;
  padding: 16px;
  background: transparent;
  color: var(--blue-light);
  border: 1px solid rgba(59,141,245,0.25);
  border-radius: 14px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}

#send-another-btn:hover {
  background: rgba(59,141,245,0.08);
  border-color: rgba(59,141,245,0.4);
}

/* ─── Footer ─── */
footer {
  width: 100%;
  padding: 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

footer a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
}

footer a:hover { color: var(--text-muted); }
footer .brand { color: var(--blue-light); font-weight: 600; }

/* ─── Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}