/* ========================= */
/* style.css */
/* ========================= */

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap');

:root {
  --bg: #0f1113;
  --surface: #15171a;
  --surface-soft: #1e2126;
  --border: #2a2e34;
  --accent: #6f757c;
  --text-main: #d6d7d9;
  --text-secondary: #8b9096;
}

* {
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: 'Roboto', system-ui, sans-serif;
}

body {
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 1100px;
  padding: 32px;
}

.card {
  background: var(--surface);
  border-radius: 18px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.7);
}

.header h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 500;
}

.header p {
  margin-top: 6px;
  color: var(--text-secondary);
}

/* Tabs */
.tabs {
  display: flex;
  gap: 10px;
  margin: 28px 0 32px;
}

.tab {
  appearance: none;
  -webkit-appearance: none;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px 18px;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  border-radius: 4px; /* небольшие границы */
}

.tab.active {
  background: var(--accent);
  color: var(--text-main);
}

.tab:hover {
  background: #23262c;
  color: var(--text-main);
}

/* Content */
.tab-content {
  display: none;
  min-height: 120px;
}

.tab-content.active {
  display: block;
}

.muted {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Flat graphite button as link */
.flat-btn {
  display: inline-block;
  appearance: none;
  -webkit-appearance: none;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 14px 24px;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
  border-radius: 0; /* прямые углы */
}

.flat-btn:hover {
  background: #23262c;
}