/* ===========================
   E-SHELLE · BILLING THEME 2026
   =========================== */

:root {
  --b-bg: #020617;
  --b-accent-green: #22c55e;
  --b-accent-blue: #38bdf8;
  --b-accent-purple: #a855f7;

  --b-text-strong: #f9fafb;
  --b-text: #e5e7eb;
  --b-text-muted: #94a3b8;

  --b-border-subtle: rgba(148,163,184,0.3);
  --b-border-strong: rgba(148,163,184,0.7);

  --b-radius-lg: 22px;
  --b-radius-pill: 999px;

  --b-shadow-soft: 0 18px 40px rgba(15,23,42,0.85);
  --b-shadow-header: 0 16px 40px rgba(15,23,42,0.9);

  --b-transition-fast: 150ms ease-out;
  --b-transition: 220ms cubic-bezier(0.23,0.88,0.32,1);
}

/* BODY billing */
.b-body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at top, rgba(56,189,248,0.16), transparent 55%),
    radial-gradient(circle at bottom, rgba(34,197,94,0.14), transparent 55%),
    radial-gradient(circle at top left, rgba(168,85,247,0.18), transparent 60%),
    linear-gradient(135deg, var(--b-bg), #020617);
  color: var(--b-text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.b-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

/* HEADER */
.b-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(2,6,23,0.98), rgba(2,6,23,0.9), transparent);
  border-bottom: 1px solid rgba(15,23,42,0.9);
  box-shadow: var(--b-shadow-header);
}

.b-header .b-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
}

.b-brand {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  text-decoration: none;
  background: linear-gradient(120deg, #4ade80, #22c55e, #22c55e, #38bdf8, #a855f7);
  background-size: 220% 220%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: brandShift 6s ease-in-out infinite alternate;
}

@keyframes brandShift {
  from { background-position: 0% 50%; }
  to   { background-position: 100% 50%; }
}

.b-nav {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: .9rem;
}

.b-nav a {
  position: relative;
  color: var(--b-text);
  text-decoration: none;
  padding: 6px 0;
  transition: color var(--b-transition-fast);
}

.b-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--b-accent-green), var(--b-accent-blue));
  transition: width var(--b-transition-fast);
}

.b-nav a:hover {
  color: var(--b-text-strong);
}
.b-nav a:hover::after {
  width: 100%;
}

/* MAIN */
main.b-container {
  flex: 1;
  width: 100%;
  padding: 26px 20px 40px;
  box-sizing: border-box;
}

/* ===========================
   PANELS / CARDS
   =========================== */

.b-card,
.panel {
  background:
    radial-gradient(circle at top left, rgba(56,189,248,0.18), transparent 55%),
    radial-gradient(circle at bottom right, rgba(34,197,94,0.16), transparent 55%),
    rgba(15,23,42,0.94);
  border-radius: var(--b-radius-lg);
  padding: 26px 22px;
  margin-bottom: 24px;
  border: 1px solid rgba(148,163,184,0.55);
  box-shadow: var(--b-shadow-soft);
  backdrop-filter: blur(18px);
  color: #e5e7eb;
  animation: fadePanel .45s ease-out;
}

.b-card h1,
.b-card h2,
.b-card h3,
.panel h1,
.panel h2,
.panel h3 {
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #34d399, #06b6d4, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===========================
   BUTTONS
   =========================== */

.b-btn,
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: var(--b-radius-pill);
  border: 1px solid rgba(148,163,184,0.55);
  background: rgba(15,23,42,0.9);
  color: var(--b-text);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  gap: .35rem;
  white-space: nowrap;
  transition:
    background var(--b-transition-fast),
    border-color var(--b-transition-fast),
    box-shadow var(--b-transition-fast),
    transform var(--b-transition-fast),
    color var(--b-transition-fast);
}

.b-btn:hover,
.btn:hover {
  border-color: var(--b-border-strong);
  background: radial-gradient(circle at top left, rgba(56,189,248,0.22), rgba(15,23,42,1));
  color: var(--b-text-strong);
  box-shadow: 0 14px 32px rgba(15,23,42,0.95);
  transform: translateY(-1px);
}

.b-primary,
.btn-primary {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  border-color: transparent;
  color: #020617;
  box-shadow: 0 10px 26px rgba(37,99,235,0.65);
}

.b-primary:hover,
.btn-primary:hover {
  box-shadow: 0 14px 36px rgba(37,99,235,0.85);
}

/* full width helper */
.w-full {
  width: 100%;
}

/* ===========================
   FORMS
   =========================== */

.b-form {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.b-form-row,
.field {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.b-form-row label,
.field label {
  font-weight: 600;
  font-size: .9rem;
  color: #d1d5db;
}

.b-form-row input,
.b-form-row textarea,
.b-form-row select,
.input,
select.input,
textarea.input {
  background: rgba(15,23,42,0.95);
  border: 1px solid rgba(148,163,184,0.55);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: .92rem;
  color: #e5e7eb;
  outline: none;
  transition: all .18s ease-out;
}

.b-form-row input:focus,
.b-form-row textarea:focus,
.b-form-row select:focus,
.input:focus {
  border-color: rgba(56,189,248,0.85);
  box-shadow: 0 0 0 1px rgba(56,189,248,.5), 0 8px 20px rgba(15,23,42,.9);
  background: rgba(15,23,42,0.98);
}

.b-error {
  color: #fca5a5;
  font-size: .82rem;
  margin-top: -2px;
}

/* ===========================
   TABLES
   =========================== */

.table {
  width: 100%;
  border-collapse: collapse;
  color: #e5e7eb;
  font-size: .9rem;
}

.table thead {
  background: rgba(255,255,255,0.06);
}

.table th,
.table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(148,163,184,0.25);
}

.table tbody tr:hover {
  background: rgba(255,255,255,0.04);
}

/* ===========================
   PILL / BADGES / TEXT
   =========================== */

.pill {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 18px;
  font-size: .86rem;
  border: 1px solid rgba(148,163,184,0.4);
  background: rgba(255,255,255,0.06);
  color: #e5e7eb;
}

.pill.success {
  background: rgba(34,197,94,0.15);
  border-color: rgba(34,197,94,0.55);
  color: #bbf7d0;
}

.muted {
  color: var(--b-text-muted);
  font-size: .86rem;
}

.link {
  color: #38bdf8;
  text-decoration: none;
  font-weight: 500;
}

.link:hover {
  text-decoration: underline;
  color: #7dd3fc;
}

/* ===========================
   MESSAGES
   =========================== */

.b-messages {
  margin-bottom: 20px;
  display: grid;
  gap: 8px;
}

.b-msg {
  padding: 10px 12px;
  border-radius: 14px;
  font-size: .9rem;
  border: 1px solid rgba(148,163,184,0.5);
  background: rgba(15,23,42,0.85);
  box-shadow: 0 10px 26px rgba(15,23,42,0.9);
}

.b-msg.success {
  border-color: rgba(34,197,94,0.7);
  background: rgba(22,163,74,0.18);
  color: #bbf7d0;
}
.b-msg.error {
  border-color: rgba(248,113,113,0.8);
  background: rgba(127,29,29,0.7);
  color: #fee2e2;
}
.b-msg.warning {
  border-color: rgba(251,191,36,0.8);
  background: rgba(120,53,15,0.7);
  color: #fef3c7;
}
.b-msg.info {
  border-color: rgba(56,189,248,0.8);
  background: rgba(15,23,42,0.85);
  color: #e0f2fe;
}

/* FOOTER */
.b-footer {
  border-top: 1px solid rgba(15,23,42,0.9);
  background: radial-gradient(circle at top, rgba(15,23,42,0.96), rgba(2,6,23,0.98));
  padding: 12px 0 16px;
  font-size: .82rem;
  color: var(--b-text-muted);
}

.b-footer .b-container {
  text-align: center;
}

/* GRID HELPERS (plans / spec-cards) */
.b-cards,
.spec-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px,1fr));
  gap: 18px;
  margin-top: 12px;
}

.b-plan,
.spec-card {
  background: rgba(15,23,42,0.96);
  border-radius: 18px;
  padding: 18px 16px 18px;
  border: 1px solid rgba(148,163,184,0.4);
  box-shadow: 0 16px 32px rgba(15,23,42,0.9);
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}

.b-plan:hover,
.spec-card:hover {
  transform: translateY(-5px);
  border-color: rgba(56,189,248,0.45);
  box-shadow:
    0 20px 40px rgba(0,0,0,0.55),
    0 0 32px rgba(56,189,248,0.25);
}

.b-plan h3,
.spec-title {
  font-size: 1.1rem;
  font-weight: 800;
  background: linear-gradient(135deg,#34d399,#06b6d4,#3b82f6);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}

/* Animations */
@keyframes fadePanel {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  .b-header .b-container {
    flex-wrap: wrap;
    row-gap: 8px;
  }
  .b-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  main.b-container {
    padding-inline: 16px;
  }
}