/* ============================================
   SERGAS QuickPay - Enhanced UI/UX Design
   Modern, Corporate, Premium Experience
   ============================================ */

/* ====== CSS VARIABLES & THEME ====== */
:root {
  /* Corporate Color Palette - Gas/Energy Industry */
  --qp-primary: #23b26e;
  --qp-primary-hover: #1e9e5f;
  --qp-primary-light: #3dd68b;
  --qp-secondary: #007bff;
  --qp-secondary-hover: #0069d9;
  --qp-accent: #8aa3e6;
  --qp-accent-light: #b4c8ff;
  /* Background Gradients */
  --qp-bg-main: #272d3f;
  --qp-bg-container: #424d6d;
  --qp-bg-panel: #515f8f;
  --qp-bg-panel-hover: #5b6ca7;
  --qp-bg-input: rgba(46, 56, 85, 0.94);
  --qp-bg-surface: linear-gradient(165deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.03) 35%, rgba(0,0,0,0.08) 100%);
  /* Text Colors */
  --qp-text-primary: #f2f7fb;
  --qp-text-secondary: #d5deef;
  --qp-text-muted: #d6def7;
  --qp-text-dark: #4a4a4a;
  /* Status Colors */
  --qp-success: #28a745;
  --qp-success-light: #63e6b0;
  --qp-info: #e0f7fa;
  --qp-info-text: #00796b;
  --qp-danger: #d9534f;
  --qp-warning: #ffc107;
  /* Shadows & Effects */
  --qp-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
  --qp-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.18);
  --qp-shadow-lg: 0 18px 38px rgba(0, 0, 0, 0.48);
  --qp-shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.56);
  --qp-shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --qp-shadow-focus: 0 8px 16px rgba(0, 0, 0, 0.22), 0 0 0 0.2rem rgba(182, 221, 255, 0.3);
  /* Spacing & Sizing */
  --qp-border-radius: 16px;
  --qp-border-radius-sm: 12px;
  --qp-border-radius-lg: 20px;
  --qp-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --qp-transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --qp-transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ====== GLOBAL STYLES ====== */
body {
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--qp-text-dark);
  background: var(--qp-bg-main);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Smooth scroll behavior */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

/* Container responsiveness */
.container-xxl, .container-xl, .container-lg, .container-md, .container-sm, .container {
  max-width: 1780px !important;
  padding: 0 20px;
}

/* ====== ANIMATED BACKGROUND ====== */
.center-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 90vh;
  position: relative;
  overflow: hidden;
  padding: 40px 20px;
}

  /* Subtle animated gradient overlay */
  .center-container::before {
    content: "";
    position: absolute;
    inset: -180px;
    background: radial-gradient(520px 520px at 20% 10%, rgba(35,178,110,0.16) 0%, rgba(39,45,63,0) 55%), radial-gradient(620px 620px at 85% 15%, rgba(138,163,230,0.18) 0%, rgba(39,45,63,0) 60%), radial-gradient(760px 760px at 60% 95%, rgba(255,255,255,0.05) 0%, rgba(39,45,63,0) 55%);
    pointer-events: none;
    animation: bgPulse 20s ease-in-out infinite alternate;
    z-index: 0;
  }

@keyframes bgPulse {
  0% {
    opacity: 0.5;
    transform: scale(1) rotate(0deg);
  }

  100% {
    opacity: 0.8;
    transform: scale(1.05) rotate(2deg);
  }
}

/* ====== MAIN CONTAINER ====== */
.quickpay-container {
  position: relative;
  z-index: 1;
  background: var(--qp-bg-container);
  border-radius: var(--qp-border-radius-lg);
  box-shadow: var(--qp-shadow-lg), var(--qp-shadow-inset);
  padding: 40px 36px;
  max-width: 520px;
  width: 100%;
  text-align: center;
  margin: 0 auto;
  font-family: 'Poppins', sans-serif;
  animation: containerFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transform-origin: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

@keyframes containerFadeIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Logo styling with subtle pulse */
.quickpay-container img {
  width: 130px;
  height: auto;
  margin-bottom: 8px;
  animation: logoFloat 3s ease-in-out infinite;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
  transition: var(--qp-transition);
}

@keyframes logoFloat {
  0%, 100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-5px);
  }
}

.quickpay-container img:hover {
  transform: scale(1.05);
}

/* Main heading */
.quickpay-container h1 {
  color: var(--qp-text-primary);
  font-size: 32px;
  margin-bottom: 12px;
  margin-top: 8px;
  font-weight: 700;
  letter-spacing: -0.5px;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

/* Subtitle text */
.quickpay-subtitle {
  color: var(--qp-text-secondary);
  margin-bottom: 24px;
  font-size: 15px;
  line-height: 1.5;
  opacity: 0.92;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

/* ====== CONTRACT INFO HIGHLIGHT ====== */
.contract-info {
  background: linear-gradient(135deg, var(--qp-info) 0%, #c8f4ed 100%);
  padding: 18px 20px;
  border-radius: var(--qp-border-radius-sm);
  font-size: 17px;
  color: var(--qp-info-text);
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 12px;
  transition: var(--qp-transition-bounce);
  box-shadow: var(--qp-shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(0, 121, 107, 0.15);
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.3s backwards;
  position: relative;
  overflow: hidden;
}

  .contract-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s;
  }

  .contract-info:hover::before {
    left: 100%;
  }

  .contract-info:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 121, 107, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  }

  .contract-info i {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--qp-info-text);
    font-size: 22px;
    animation: iconPulse 2s ease-in-out infinite;
  }

@keyframes iconPulse {
  0%, 100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.1);
  }
}

.contract-info p {
  margin: 0;
  font-size: 17px;
  letter-spacing: 0.2px;
}

/* ====== OUTSTANDING AMOUNT ====== */
.outstanding-amount {
  background: linear-gradient(145deg, var(--qp-bg-panel) 0%, rgba(75, 88, 127, 0.98) 100%);
  color: var(--qp-text-primary);
  font-size: 36px;
  font-weight: 800;
  padding: 32px 24px;
  border-radius: var(--qp-border-radius);
  margin: 24px 0;
  transition: var(--qp-transition);
  box-shadow: var(--qp-shadow-md), var(--qp-shadow-inset);
  border: 1px solid rgba(255, 255, 255, 0.12);
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.4s backwards;
  position: relative;
  overflow: hidden;
}

  .outstanding-amount::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    animation: shimmer 4s linear infinite;
    pointer-events: none;
  }

@keyframes shimmer {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.outstanding-amount p {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 8px;
  opacity: 0.85;
  font-weight: 600;
}

.outstanding-amount:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), var(--qp-shadow-inset);
  background: linear-gradient(145deg, var(--qp-bg-panel-hover) 0%, rgba(85, 100, 145, 0.98) 100%);
}

/* ====== INFO SECTIONS ====== */
.info-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  background: linear-gradient(135deg, var(--qp-bg-panel) 0%, rgba(75, 88, 127, 0.95) 100%);
  color: var(--qp-text-primary);
  border-radius: var(--qp-border-radius-sm);
  margin-bottom: 12px;
  transition: var(--qp-transition);
  box-shadow: var(--qp-shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) backwards;
  position: relative;
  overflow: hidden;
}

  .info-section::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--qp-accent);
    transform: scaleY(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: top;
  }

  .info-section:hover::before {
    transform: scaleY(1);
  }

  .info-section:nth-child(5) {
    animation-delay: 0.5s;
  }

  .info-section:nth-child(6) {
    animation-delay: 0.55s;
  }

  .info-section:nth-child(7) {
    animation-delay: 0.6s;
  }

  .info-section:hover {
    background: linear-gradient(135deg, var(--qp-bg-panel-hover) 0%, rgba(85, 100, 145, 0.95) 100%);
    transform: translateX(6px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  }

  .info-section p {
    margin: 0;
    font-size: 16px;
    color: var(--qp-text-primary);
    font-weight: 500;
  }

  .info-section strong {
    font-weight: 700;
  }

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

  .reading-data i {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--qp-accent-light);
    font-size: 18px;
    transition: var(--qp-transition-fast);
  }

.info-section:hover .reading-data i {
  transform: scale(1.15) rotate(5deg);
  color: var(--qp-primary-light);
}

/* ====== BUTTONS ====== */
button, .btn {
  padding: 16px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--qp-border-radius-sm);
  cursor: pointer;
  border: none;
  transition: var(--qp-transition);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
  text-transform: none;
  box-shadow: var(--qp-shadow-md);
}

  button::before, .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
  }

  button:hover::before, .btn:hover::before {
    width: 300px;
    height: 300px;
  }

  button:active, .btn:active {
    transform: scale(0.97);
  }

/* Pay Now Button */
.pay-now-btn {
  background: linear-gradient(135deg, var(--qp-primary) 0%, #1e9e5f 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

  .pay-now-btn:hover {
    background: linear-gradient(135deg, var(--qp-primary-hover) 0%, #1a8d53 100%);
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(35, 178, 110, 0.35);
  }

  .pay-now-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
  }

/* Download Invoice Button */
.download-invoice-btn {
  background: linear-gradient(135deg, var(--qp-secondary) 0%, #0069d9 100%);
  color: white;
}

  .download-invoice-btn:hover {
    background: linear-gradient(135deg, var(--qp-secondary-hover) 0%, #005cbf 100%);
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(0, 123, 255, 0.35);
  }

/* Button Container */
.button-container {
  display: flex;
  gap: 14px;
  margin-top: 24px;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.7s backwards;
}

  .button-container button,
  .button-container a {
    flex: 1;
  }

/* ====== FORM ELEMENTS ====== */
.qp-surface {
  margin-top: 24px;
  padding: 20px;
  border-radius: var(--qp-border-radius);
  background: var(--qp-bg-surface);
  border: 1px solid rgba(255, 255, 255, 0.10);
  box-shadow: var(--qp-shadow-inset);
  text-align: left;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0.4s backwards;
}

.qp-panel {
  margin-bottom: 20px;
}

  .qp-panel label {
    color: var(--qp-text-primary);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.3px;
    margin-bottom: 8px;
    display: block;
  }

.qp-inline {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.qp-inline-label {
  min-width: 120px;
  color: var(--qp-text-primary);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.3px;
}

.qp-inline-input {
  flex: 1;
  min-width: 220px;
}

.qp-panel .form-control,
.qp-panel .form-select {
  background-color: var(--qp-bg-input);
  border: 1px solid var(--qp-accent);
  color: var(--qp-text-primary);
  border-radius: var(--qp-border-radius-sm);
  padding: 12px 18px;
  height: 52px;
  font-size: 15px;
  transition: var(--qp-transition-fast);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

  .qp-panel .form-control:focus,
  .qp-panel .form-select:focus {
    border-color: var(--qp-accent-light);
    box-shadow: var(--qp-shadow-focus);
    background-color: rgba(55, 68, 102, 0.94);
    outline: none;
    transform: translateY(-1px);
  }

  .qp-panel .form-control::placeholder {
    color: rgba(242, 247, 251, 0.5);
    font-style: italic;
  }

  .qp-panel .form-select option {
    background-color: #2f374f;
    color: var(--qp-text-primary);
    padding: 10px;
  }

.qp-panel .hint,
.qp-hint {
  color: var(--qp-text-muted);
  font-size: 12px;
  margin-top: 6px;
  opacity: 0.85;
}

/* ====== LINK BOX (Generated Links) ====== */
.qp-link-box {
  background: linear-gradient(145deg, #56669e 0%, #48527b 100%);
  border-radius: var(--qp-border-radius-sm);
  padding-left: 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--qp-shadow-md), var(--qp-shadow-inset);
  display: flex;
  align-items: center;
  overflow: hidden;
  transition: var(--qp-transition-fast);
}

  .qp-link-box:hover {
    box-shadow: var(--qp-shadow-lg);
    border-color: rgba(255, 255, 255, 0.25);
  }

  .qp-link-box input {
    background: transparent;
    border: none;
    color: var(--qp-text-primary);
    flex: 1;
    padding: 12px 8px;
    font-size: 14px;
  }

    .qp-link-box input:focus {
      outline: none;
    }

  .qp-link-box .btn {
    background: linear-gradient(135deg, var(--qp-primary) 0%, #1e9e5f 100%);
    color: #fff;
    border: none;
    border-radius: var(--qp-border-radius-sm);
    padding: 12px 20px;
    margin: 4px;
    font-weight: 600;
    white-space: nowrap;
  }

    .qp-link-box .btn:hover {
      background: linear-gradient(135deg, var(--qp-primary-hover) 0%, #1a8d53 100%);
      box-shadow: 0 8px 16px rgba(35, 178, 110, 0.3);
    }

/* ====== ALERTS & STATUS ====== */
.qp-alert {
  border-radius: var(--qp-border-radius-sm);
  padding: 12px 16px;
  margin: 14px 0;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 80, 80, 0.12);
  color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--qp-shadow-inset);
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-8px);
  }

  75% {
    transform: translateX(8px);
  }
}

.text-success {
  color: var(--qp-success-light) !important;
  animation: fadeIn 0.4s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* ====== LOGOUT BUTTON ====== */
.btn-outline-light {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--qp-transition-fast);
}

  .btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.35);
    transform: rotate(90deg);
  }

/* ====== TOAST NOTIFICATIONS ====== */
.toast-container {
  z-index: 9999;
}

.bs-toast {
  backdrop-filter: blur(10px);
  border-radius: var(--qp-border-radius-sm);
  box-shadow: var(--qp-shadow-lg);
  animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ====== LOADING STATES ====== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ====== BOX CONTAINER (Error Pages) ====== */
.box-container {
  background-color: var(--qp-bg-container);
  border-radius: var(--qp-border-radius);
  box-shadow: var(--qp-shadow-lg);
  padding: 40px 32px;
  max-width: 100%;
  width: 520px;
  text-align: center;
  margin: 0 auto;
  font-family: 'Poppins', sans-serif;
  animation: containerFadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

  .box-container h1 {
    color: #ffffff;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
  }

  .box-container p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.9);
    margin: 20px 0;
    line-height: 1.6;
  }

  .box-container img {
    width: 130px;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
  }

/* ====== RESPONSIVE DESIGN ====== */
@media (max-width: 768px) {
  .quickpay-container,
  .box-container {
    padding: 28px 24px;
    width: 100%;
    max-width: 100%;
  }

    .quickpay-container h1 {
      font-size: 26px;
    }

  .outstanding-amount {
    font-size: 30px;
    padding: 24px 18px;
  }

  .info-section p {
    font-size: 14px;
  }

  button, .btn {
    padding: 12px 18px;
    font-size: 14px;
  }

  .button-container {
    flex-direction: column;
  }

  .qp-inline {
    flex-direction: column;
    align-items: stretch;
  }

  .qp-inline-label {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .quickpay-container,
  .box-container {
    padding: 24px 20px;
  }

    .quickpay-container h1 {
      font-size: 24px;
    }

    .quickpay-container img {
      width: 110px;
    }

  .outstanding-amount {
    font-size: 28px;
    padding: 20px 16px;
  }

    .outstanding-amount p {
      font-size: 12px;
    }

  .info-section p {
    font-size: 13px;
  }

  button, .btn {
    padding: 11px 16px;
    font-size: 13px;
  }

  .contract-info {
    font-size: 15px;
    padding: 14px 16px;
  }
}

/* ====== ACCESSIBILITY ====== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
button:focus-visible,
.btn:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--qp-accent-light);
  outline-offset: 2px;
}

/* ====== PRINT STYLES ====== */
@media print {
  .center-container::before {
    display: none;
  }

  .quickpay-container {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  button, .btn {
    display: none;
  }
}