/* =============================================
   GLOBAL RESET & BASE
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --mtn-yellow: #FFCC00;
  --mtn-dark:   #1A1A1A;
  --airtel-red: #E3001B;
  --white:      #ffffff;
  --bg:         #f5f6fa;
  --card-bg:    #ffffff;
  --text:       #222222;
  --sub-text:   #666666;
  --border:     #e0e0e0;
  --success:    #28a745;
  --error:      #dc3545;
  --radius:     14px;
  --shadow:     0 4px 24px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 40px rgba(0,0,0,0.16);
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* =============================================
   HEADER
   ============================================= */
.site-header {
  background: var(--mtn-dark);
  padding: 22px 40px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mtn-badge {
  background: var(--mtn-yellow);
  color: var(--mtn-dark);
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: 2px;
  padding: 4px 12px;
  border-radius: 6px;
}

.header-title {
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 700;
}

.tagline {
  color: #aaa;
  font-size: 0.9rem;
  margin-left: auto;
}

/* =============================================
   PACKAGES SECTION
   ============================================= */
.packages-section {
  max-width: 1100px;
  margin: 48px auto;
  padding: 0 20px;
}

.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--mtn-dark);
  margin-bottom: 8px;
}

.section-sub {
  text-align: center;
  color: var(--sub-text);
  margin-bottom: 40px;
  font-size: 1rem;
}

/* =============================================
   CARDS GRID
   ============================================= */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: start;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  position: relative;
  transition: transform 0.25s, box-shadow 0.25s;
  border: 2px solid transparent;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card.featured {
  border-color: var(--mtn-yellow);
  transform: scale(1.04);
}

.card.featured:hover {
  transform: scale(1.04) translateY(-6px);
}

/* badge */
.card-badge.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--mtn-yellow);
  color: var(--mtn-dark);
  font-weight: 800;
  font-size: 0.72rem;
  letter-spacing: 1px;
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(255,204,0,0.4);
}

.card-icon {
  font-size: 2.6rem;
}

.card-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--mtn-dark);
}

.card-amount {
  font-size: 1.6rem;
  color: var(--text);
}

.card-amount strong {
  color: var(--mtn-dark);
  font-size: 2rem;
}

.card-features {
  list-style: none;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--sub-text);
  font-size: 0.92rem;
  padding: 0;
  margin: 0;
}

.card-features li {
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
}

.card-features li:last-child { border-bottom: none; }

/* =============================================
   BUTTONS
   ============================================= */
.card-buttons {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  letter-spacing: 0.4px;
}

.btn:hover  { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-mtn {
  background: var(--mtn-yellow);
  color: var(--mtn-dark);
}

.btn-airtel {
  background: var(--airtel-red);
  color: var(--white);
}

.btn-full { width: 100%; }

/* =============================================
   MODAL OVERLAY
   ============================================= */
.modal-overlay {
  display: none;            /* hidden by default */
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

.modal-overlay.open {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* =============================================
   MODAL BOX
   ============================================= */
.modal-box {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 36px 32px 30px;
  max-width: 420px;
  width: 100%;
  position: relative;
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 14px; right: 16px;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--sub-text);
  transition: color 0.2s;
}
.modal-close:hover { color: var(--error); }

.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--mtn-dark);
}

.modal-badge { font-size: 0.85rem; }

.modal-desc {
  font-size: 0.88rem;
  color: var(--sub-text);
  line-height: 1.6;
  margin-bottom: 14px;
}

.modal-summary {
  background: var(--bg);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 18px;
  line-height: 1.8;
}

/* =============================================
   FORM
   ============================================= */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--mtn-dark);
}

.phone-input-wrap {
  display: flex;
  border: 2px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.phone-input-wrap:focus-within {
  border-color: var(--mtn-yellow);
}

.phone-prefix {
  background: var(--mtn-yellow);
  color: var(--mtn-dark);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 12px;
  user-select: none;
  white-space: nowrap;
}

.phone-input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 14px;
  font-size: 1rem;
  color: var(--text);
  background: transparent;
}

.hint {
  font-size: 0.78rem;
  color: var(--sub-text);
  margin-top: 4px;
  display: block;
}

/* =============================================
   MODAL ERROR / SUCCESS
   ============================================= */
.modal-error {
  background: #fff0f0;
  border: 1px solid var(--error);
  color: var(--error);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin-bottom: 14px;
}

.modal-success {
  margin-top: 18px;
  background: #f0fff4;
  border: 1px solid var(--success);
  border-radius: 8px;
  padding: 18px;
  text-align: center;
  color: var(--success);
  font-size: 0.9rem;
  line-height: 1.6;
}

.modal-success span { font-size: 2rem; display: block; margin-bottom: 8px; }
.modal-success strong { font-size: 1rem; display: block; margin-bottom: 4px; }

/* =============================================
   SPINNER
   ============================================= */
.spinner {
  width: 18px;
  height: 18px;
  border: 3px solid rgba(0,0,0,0.15);
  border-top-color: var(--mtn-dark);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 600px) {
  .site-header { padding: 16px 20px; }
  .section-title { font-size: 1.5rem; }
  .modal-box { padding: 28px 18px 22px; }
  .card.featured { transform: scale(1); }
  .card.featured:hover { transform: translateY(-6px); }
}