:root {
  --bg-top: #1a1234;
  --bg-mid: #111527;
  --bg-bottom: #070d1a;
  --surface: #141d31;
  --surface-strong: #19233c;
  --text: #f4f7ff;
  --text-muted: #c9d2ea;
  --accent: #8bdd39;
  --accent-strong: #b0f768;
  --link: #dde3ff;
  --ring: #9dafff;
  --danger: #ff6e78;
  --radius: 10px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 15px;
  --space-lg: 40px;
  --heading-font: "Playfair Display", serif;
  --body-font: "Lato", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  color: var(--text);
  font-family: var(--body-font);
  background: radial-gradient(circle at 22% 14%, var(--bg-top) 0%, var(--bg-mid) 44%, var(--bg-bottom) 100%);
  min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-bottom: var(--space-md);
  color: var(--text);
  font-family: var(--heading-font);
}

p,
li,
label {
  color: var(--text-muted);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.page {
  margin-top: var(--space-lg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md);
}

.container-width-600,
.container-width-900 {
  margin: 0 auto;
  padding: var(--space-md);
}

.container-width-600 {
  max-width: 600px;
}

.container-width-900 {
  max-width: 900px;
}

.margin-top-150px {
  margin-top: 150px;
}

.margin-top-100px {
  margin-top: 100px;
}

.margin-top-75px {
  margin-top: 75px;
}

.text-center {
  text-align: center;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(90deg, #111734, #17122f);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
}

.navbar .navbar-brand,
.navbar .nav-link,
.navbar .btn-link {
  color: #f7f9ff !important;
}

.navbar .navbar-brand {
  font-weight: 700;
}

.navbar .nav-link {
  font-weight: 600;
}

.navbar .nav-link:hover,
.navbar .navbar-brand:hover {
  color: var(--accent-strong) !important;
}

.navbar-toggler {
  border-color: rgba(245, 248, 255, 0.45);
}

.navbar-light .navbar-toggler-icon {
  filter: invert(1) brightness(1.35);
}

.logout-btn {
  border: 0;
  background: transparent;
  padding: 0;
}

.plan-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin: var(--space-lg) auto;
  padding: var(--space-md) 0;
}

.plan {
  background: linear-gradient(155deg, var(--surface), var(--surface-strong));
  border: 1px solid rgba(139, 221, 57, 0.85);
  border-radius: var(--radius);
  padding: 1.35rem;
  color: var(--text);
  box-shadow: 0 10px 26px rgba(4, 8, 18, 0.35);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  height: 40px;
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  border: 2px solid var(--accent-strong);
  background: var(--accent);
  color: #142008;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
  color: #111a07;
  background: var(--accent-strong);
  transform: translateY(-1px);
  text-decoration: none;
  box-shadow: 0 6px 14px rgba(139, 221, 57, 0.28);
}

.button:focus,
.button-ctn:focus,
.button-cncl:focus,
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.button-ctn,
.button-cncl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  height: 40px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 0.45rem 0.8rem;
  border: 2px solid transparent;
  text-decoration: none;
}

.button-ctn {
  background: #34162d;
  border-color: var(--danger);
  color: #ffd9dd;
}

.button-ctn:hover {
  background: #4a1a3a;
  color: #ffe8eb;
  text-decoration: none;
}

.button-cncl {
  background: #202c49;
  border-color: #5a74ae;
  color: #e4ebff;
}

.button-cncl:hover {
  background: #2b3a62;
  color: #fff;
  text-decoration: none;
}

input,
select,
textarea {
  width: 100%;
  background-color: #0d1427;
  color: var(--text);
  border: 1px solid #5b6fa4;
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
}

form p {
  margin-bottom: 0.9rem;
}

ul,
ol {
  padding-left: 1.1rem;
}

@media (max-width: 768px) {
  .margin-top-100px {
    margin-top: 84px;
  }

  .margin-top-75px,
  .margin-top-150px {
    margin-top: 84px;
  }

  .plan-container {
    grid-template-columns: 1fr;
    margin-top: 1rem;
  }

  .button,
  .button-ctn,
  .button-cncl {
    min-width: 84px;
  }
}