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

:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --bg: #0f0f13;
  --surface: #18181f;
  --surface2: #222230;
  --border: #2e2e3e;
  --text: #e8e8f0;
  --text-muted: #8888aa;
  --error: #f87171;
  --success: #34d399;
  --warning: #fbbf24;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
}

/* Screens */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; }

/* Login */
#screen-login {
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  width: 100%;
  max-width: 400px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 18px;
  font-weight: 600;
}

.login-card h2 { font-size: 22px; margin-bottom: 6px; }
.subtitle { color: var(--text-muted); margin-bottom: 24px; }

/* Main layout */
#screen-main { flex-direction: column; }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 13px;
}

.main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 32px 24px;
}

.send-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 560px;
}

.send-card h2 {
  font-size: 18px;
  margin-bottom: 24px;
}

/* Fields */
.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.optional { font-weight: 400; opacity: 0.6; }

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--primary);
}

select option { background: var(--surface2); }

textarea { resize: vertical; min-height: 90px; }

.msg-textarea { margin-bottom: 8px; }

.msg-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.delay-control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.input-delay {
  width: 54px;
  text-align: center;
  padding: 5px 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  transition: background 0.15s, opacity 0.15s;
}

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

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) { background: var(--surface2); color: var(--text); }

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; margin-top: 8px; }

/* Contact status */
.contact-status {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
  border: 1px solid;
}

.contact-status.found {
  background: rgba(52, 211, 153, 0.08);
  border-color: rgba(52, 211, 153, 0.25);
  color: var(--success);
}

.contact-status.not-found {
  background: rgba(251, 191, 36, 0.08);
  border-color: rgba(251, 191, 36, 0.25);
  color: var(--warning);
}

/* Open conversations */
.open-conversations {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 16px;
}

.section-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.conv-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  cursor: pointer;
}

.conv-item:last-child { border-bottom: none; }

.conv-item input[type="radio"] { accent-color: var(--primary); }

.conv-item .conv-info { flex: 1; }
.conv-item .conv-inbox { color: var(--text-muted); font-size: 12px; }

.conv-item a {
  color: var(--primary);
  text-decoration: none;
  font-size: 12px;
}
.conv-item a:hover { text-decoration: underline; }

.radio-options { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }

.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}

.radio-option input { accent-color: var(--primary); }

/* Countdown */
.countdown {
  text-align: center;
  padding: 12px;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 10px;
}

/* Result */
.result {
  margin-top: 16px;
  padding: 14px;
  border-radius: 8px;
  font-size: 13px;
  border: 1px solid;
}

.result.success {
  background: rgba(52, 211, 153, 0.08);
  border-color: rgba(52, 211, 153, 0.25);
  color: var(--success);
}

.result.error {
  background: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.25);
  color: var(--error);
}

/* Helpers */
.hidden { display: none !important; }
.error { color: var(--error); font-size: 13px; margin-top: 10px; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }