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

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

:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #263348;
  --border: #334155;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --error: #f87171;
  --success: #34d399;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

html, body {
  height: 100%;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

/* ── Login ───────────────────────────────────────────────── */

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: radial-gradient(ellipse at top left, #1e1b4b 0%, var(--bg) 60%);
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.login-logo .icon {
  width: 42px;
  height: 42px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.login-logo h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.login-logo p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  margin-top: 0.5rem;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-ghost:hover {
  background: var(--bg-card-hover);
  color: var(--text);
}

.error-msg {
  display: none;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--error);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  margin-top: 1rem;
}

.error-msg.visible {
  display: block;
}

/* ── Hub ─────────────────────────────────────────────────── */

.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
}

.header-brand .icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.header-brand span {
  font-weight: 600;
  font-size: 1rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hub-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.hub-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.hub-subtitle {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}

.tool-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.tool-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(99, 102, 241, 0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.tool-card-body {
  flex: 1;
}

.tool-card-body h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.tool-card-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 500;
  gap: 0.25rem;
}

/* ── Tool page ───────────────────────────────────────────── */

.tool-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.tool-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tool-iframe {
  flex: 1;
  width: 100%;
  border: none;
  display: block;
}

/* ── Breadcrumb ──────────────────────────────────────────── */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--text);
}

.breadcrumb .sep {
  opacity: 0.4;
}

.breadcrumb .current {
  color: var(--text);
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 600px) {
  .hub-main {
    padding: 1.5rem 1rem;
  }

  .login-card {
    padding: 2rem 1.25rem;
  }

  .header-brand span {
    display: none;
  }
}