/* ================================================================
   Tulpan Travel Invoices – Front-end styles
   Inspired by Paystack's clean, trust-building invoice UI
================================================================ */

/* ---- Variables ------------------------------------------------ */
:root {
  --tti-brand:       #00b4d8;
  --tti-brand-dark:  #0077b6;
  --tti-green:       #2EB67D;
  --tti-green-dark:  #25916a;
  --tti-text:        #1a1a2e;
  --tti-muted:       #6b7280;
  --tti-border:      #e5e7eb;
  --tti-bg:          #f9fafb;
  --tti-white:       #ffffff;
  --tti-shadow:      0 4px 24px rgba(0,0,0,.10);
  --tti-radius:      12px;
  --tti-font:        'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---- Invoice Card --------------------------------------------- */
.tti-invoice-card {
  font-family: var(--tti-font);
  max-width: 520px;
  margin: 2rem auto;
  background: var(--tti-white);
  border: 1px solid var(--tti-border);
  border-radius: var(--tti-radius);
  box-shadow: var(--tti-shadow);
  overflow: hidden;
  color: var(--tti-text);
}

/* Header */
.tti-card-header {
  background: var(--tti-bg);
  text-align: center;
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--tti-border);
}

.tti-logo-area {
  margin-bottom: 1rem;
}

.tti-logo {
  max-height: 56px;
  max-width: 180px;
  object-fit: contain;
}

.tti-logo-placeholder {
  font-size: 2.4rem;
  color: var(--tti-brand);
  line-height: 1;
}

.tti-greeting {
  color: var(--tti-brand-dark);
  font-size: .95rem;
  margin: 0 0 .6rem;
  line-height: 1.5;
}

.tti-total-amount {
  font-size: 2rem;
  font-weight: 700;
  color: var(--tti-brand-dark);
  letter-spacing: -.5px;
}

/* Meta row */
.tti-card-meta {
  display: flex;
  justify-content: space-between;
  padding: .75rem 1.5rem;
  background: var(--tti-white);
  border-bottom: 1px solid var(--tti-border);
  font-size: .82rem;
  color: var(--tti-muted);
}

/* Line items */
.tti-line-items-display {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--tti-border);
}

.tti-line-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: .45rem 0;
  font-size: .9rem;
}

.tti-item-desc {
  color: var(--tti-text);
}

.tti-item-calc {
  color: var(--tti-muted);
  white-space: nowrap;
  margin-left: 1rem;
}

/* Total row */
.tti-card-total {
  display: flex;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  font-size: .95rem;
  border-bottom: 1px solid var(--tti-border);
}

.tti-total-bold {
  font-weight: 700;
  font-size: 1rem;
  color: var(--tti-text);
}

/* CTA */
.tti-cta-area {
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.tti-pay-btn {
  background: var(--tti-green);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: .75rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .18s, transform .12s;
  letter-spacing: .3px;
  width: 100%;
  max-width: 260px;
}

.tti-pay-btn:hover {
  background: var(--tti-green-dark);
  transform: translateY(-1px);
}

.tti-pay-btn:active {
  transform: translateY(0);
}

.tti-pay-btn:disabled {
  background: #9ca3af;
  cursor: default;
  transform: none;
}

/* Offline ref */
.tti-offline-ref {
  text-align: center;
  padding: 1rem 1.5rem 1.25rem;
  border-top: 1px solid var(--tti-border);
  font-size: .82rem;
  color: var(--tti-muted);
}

.tti-offline-ref p { margin: .25rem 0 .4rem; }

.tti-ref-code {
  display: inline-block;
  background: var(--tti-bg);
  border: 1px solid var(--tti-border);
  border-radius: 4px;
  padding: .25rem .6rem;
  font-size: .85rem;
  letter-spacing: 1px;
  color: var(--tti-text);
  user-select: all;
}

.tti-phone-icon { font-size: 1.4rem; }

/* Footer */
.tti-card-footer {
  background: var(--tti-bg);
  border-top: 1px solid var(--tti-border);
  text-align: center;
  padding: .9rem 1.5rem;
  font-size: .78rem;
  color: var(--tti-muted);
  line-height: 1.6;
}

.tti-card-footer a { color: var(--tti-brand-dark); }

/* Success banner */
.tti-success-banner {
  background: #d1fae5;
  border-bottom: 1px solid #6ee7b7;
  color: #065f46;
  padding: .9rem 1.25rem;
  font-size: .9rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.tti-success-icon {
  font-size: 1.2rem;
  font-weight: 700;
}

/* ---- Modal overlay -------------------------------------------- */
.tti-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .55);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  backdrop-filter: blur(3px);
}

.tti-modal {
  background: var(--tti-white);
  border-radius: var(--tti-radius);
  box-shadow: 0 20px 60px rgba(0,0,0,.22);
  padding: 2.25rem 2rem 2rem;
  width: 100%;
  max-width: 400px;
  position: relative;
  animation: tti-slide-up .22s ease;
}

@keyframes tti-slide-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tti-modal-close {
  position: absolute;
  top: .75rem;
  right: .9rem;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--tti-muted);
  cursor: pointer;
  line-height: 1;
  padding: .1rem .3rem;
  border-radius: 4px;
  transition: color .15s, background .15s;
}

.tti-modal-close:hover {
  color: var(--tti-text);
  background: var(--tti-bg);
}

.tti-modal-icon {
  font-size: 2rem;
  text-align: center;
  margin-bottom: .75rem;
}

.tti-modal h3 {
  text-align: center;
  margin: 0 0 .35rem;
  font-size: 1.1rem;
  color: var(--tti-text);
}

.tti-modal-sub {
  text-align: center;
  color: var(--tti-muted);
  font-size: .85rem;
  margin: 0 0 1.1rem;
}

.tti-email-input,
.tti-email-confirm-input {
  width: 100%;
  border: 1.5px solid var(--tti-border);
  border-radius: 7px;
  padding: .7rem .9rem;
  font-size: .95rem;
  color: var(--tti-text);
  outline: none;
  transition: border-color .18s, box-shadow .18s;
  box-sizing: border-box;
  display: block;
  margin-bottom: .5rem;
}

.tti-email-input:focus,
.tti-email-confirm-input:focus {
  border-color: var(--tti-brand);
  box-shadow: 0 0 0 3px rgba(0,180,216,.18);
}

.tti-field-error {
  color: #dc2626;
  font-size: .8rem;
  margin: .2rem 0 .5rem;
}

.tti-modal-pay-btn {
  width: 100%;
  margin-top: .75rem;
  padding: .8rem;
  border: none;
  border-radius: 7px;
  font-size: .97rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--tti-green);
  color: #fff;
  transition: background .18s, transform .12s;
}

.tti-modal-pay-btn:hover { background: var(--tti-green-dark); transform: translateY(-1px); }
.tti-modal-pay-btn:active { transform: translateY(0); }

.tti-error {
  color: #dc2626;
  font-style: italic;
}

/* ---- Responsive ---------------------------------------------- */
@media (max-width: 560px) {
  .tti-invoice-card { margin: 1rem; }
  .tti-card-header  { padding: 1.5rem 1rem 1rem; }
  .tti-line-items-display,
  .tti-card-total,
  .tti-cta-area { padding-left: 1rem; padding-right: 1rem; }
  .tti-total-amount { font-size: 1.6rem; }
  .tti-modal { padding: 1.75rem 1.25rem 1.5rem; }
}