/* =====================================================
   TIVRAPAY WEBSITE DESIGN
   Domain: tivrapay.net.in
   File: css/style.css
   Brand: Teal + Mint Green
   Lightweight, Responsive and Mobile Friendly
===================================================== */

/* ---------- ROOT VARIABLES ---------- */

:root {
  --primary: #087681;
  --primary-dark: #04545e;
  --primary-light: #e1f8f1;

  --mint: #42ddb0;
  --mint-dark: #16bfa1;
  --mint-light: #eafbf5;

  --bg: #f2fbfa;
  --white: #ffffff;

  --text: #173d40;
  --text-secondary: #587578;
  --muted: #789395;

  --border: #d8ece8;
  --border-dark: #b8ddd5;

  --shadow-sm: 0 3px 12px rgba(4, 84, 94, 0.05);
  --shadow-md: 0 8px 25px rgba(4, 84, 94, 0.09);
  --shadow-lg: 0 16px 40px rgba(4, 84, 94, 0.13);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;

  --container: 1120px;
  --transition: 0.25s ease;
}

/* ---------- RESET ---------- */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition:
    color var(--transition),
    background-color var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--mint-dark);
  outline-offset: 4px;
}

::selection {
  background: var(--mint);
  color: var(--primary-dark);
}

/* ---------- MAIN SHELL ---------- */

.shell {
  width: min(100% - 32px, var(--container));
  margin: 24px auto;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: visible;
}

.scroll {
  width: 100%;
  min-width: 0;
}

/* ---------- NAVIGATION ---------- */

.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;

  min-height: 76px;
  padding: 12px 28px;

  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;

  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
  min-width: 0;
}

.logo img {
  width: 43px;
  height: 43px;
  object-fit: contain;
  border-radius: 11px;
}

.logo-name {
  color: var(--primary);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1.2;
}

/* Desktop navigation dropdown */

.dropdown {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 4px;

  min-width: 0;
  max-width: 850px;

  padding: 0;
  background: transparent;
  border: 0;
  border-radius: var(--radius);
  box-shadow: none;
}

.dropdown a {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 7px 10px;
  border-radius: var(--radius-sm);

  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;

  transition:
    color var(--transition),
    background-color var(--transition);
}

.dropdown a:hover,
.dropdown a:focus-visible {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* ---------- HAMBURGER BUTTON ---------- */

.hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;

  width: 44px;
  height: 44px;
  padding: 10px;

  background: var(--primary-light);
  border: 1px solid var(--border-dark);
  border-radius: 11px;
}

.hamburger span {
  display: block;
  width: 21px;
  height: 2px;

  background: var(--primary);
  border-radius: 3px;

  transition:
    transform var(--transition),
    opacity var(--transition);
}

.hamburger[aria-expanded="true"] span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger[aria-expanded="true"] span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- HERO SECTION ---------- */

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;

  padding: 66px 36px 52px;
  text-align: center;

  background: linear-gradient(
    135deg,
    #087681 0%,
    #078b91 48%,
    #16bfa1 100%
  );

  border-bottom: 4px solid var(--mint);
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;

  top: -100px;
  right: -80px;

  width: 300px;
  height: 300px;

  background: radial-gradient(
    circle,
    rgba(66, 221, 176, 0.23) 0%,
    transparent 70%
  );

  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  z-index: -1;

  bottom: -180px;
  left: -100px;

  width: 360px;
  height: 360px;

  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.11) 0%,
    transparent 70%
  );

  border-radius: 50%;
  pointer-events: none;
}

.hero-logo {
  width: 90px;
  height: 90px;

  margin: 0 auto 22px;
  padding: 4px;

  object-fit: contain;

  background: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.55);
  border-radius: 23px;

  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.14);
}

.hero h1 {
  max-width: 850px;
  margin: 0 auto 18px;

  color: var(--white);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -1.2px;
}

.hero > p {
  max-width: 780px;
  margin: 0 auto 27px;

  color: #eafff9;
  font-size: 16px;
  line-height: 1.9;
}

/* ---------- BUTTONS ---------- */

.btn-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;

  margin: 18px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  min-height: 46px;
  padding: 12px 22px;

  border: 1px solid transparent;
  border-radius: 10px;

  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
  text-align: center;

  transition:
    transform var(--transition),
    background-color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--primary-dark);
  background: var(--mint);
  border-color: var(--mint);

  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
  color: var(--primary-dark);
  background: #6ce9c4;
  border-color: #6ce9c4;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.btn-outline {
  color: var(--white);
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.65);
}

.btn-outline:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.19);
  border-color: var(--white);
}

/* ---------- NOTICE BOX ---------- */

.note {
  margin: 25px 0;
  padding: 17px 19px;

  color: #315c59;
  background: var(--mint-light);

  border: 1px solid #c9eee2;
  border-left: 4px solid var(--mint-dark);
  border-radius: 10px;

  font-size: 14px;
  line-height: 1.8;
  text-align: left;
}

.note strong {
  color: var(--primary-dark);
}

.note a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Hero notice has its own contrast */

.hero .note {
  max-width: 880px;
  margin: 30px auto 0;

  color: #eafff9;
  background: rgba(4, 65, 70, 0.29);

  border-color: rgba(255, 255, 255, 0.2);
  border-left-color: var(--mint);
}

.hero .note strong {
  color: var(--white);
}

/* ---------- CONTENT SECTIONS ---------- */

.sec {
  margin: 0;
  padding: 35px 36px;

  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.sec:last-child {
  border-bottom: 0;
}

.sec h2 {
  position: relative;

  margin: 0 0 22px;
  padding: 0 0 13px;

  color: var(--primary);
  font-size: clamp(22px, 2.5vw, 29px);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.45px;

  border-bottom: 1px solid var(--border);
}

.sec h2::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;

  width: 65px;
  height: 3px;

  background: var(--mint-dark);
  border-radius: 3px;
}

.sec h3 {
  margin: 27px 0 11px;

  color: var(--primary-dark);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.45;
}

.sec p {
  margin: 0 0 17px;

  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.9;
}

.sec ul,
.sec ol {
  margin: 12px 0 23px;
  padding-left: 25px;

  color: var(--text-secondary);
}

.sec li {
  margin: 8px 0;
  padding-left: 3px;

  font-size: 15px;
  line-height: 1.8;
}

.sec li::marker {
  color: var(--primary);
}

.sec strong {
  color: var(--text);
}

.sec > *:last-child {
  margin-bottom: 0;
}

/* ---------- TABLE OF CONTENTS ---------- */

.toc-list {
  list-style: none;
  padding: 0 !important;
  margin: 15px 0 !important;

  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 12px;
}

.toc-list li {
  margin: 0 !important;
  padding: 0 !important;

  border: 0 !important;
}

.toc-list li::marker {
  content: "";
}

.toc-list a {
  display: flex;
  align-items: flex-start;
  gap: 10px;

  min-height: 100%;
  padding: 12px 14px;

  color: var(--text-secondary);
  background: #f8fdfc;

  border: 1px solid var(--border);
  border-radius: 10px;

  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;

  transition:
    background-color var(--transition),
    border-color var(--transition),
    color var(--transition);
}

.toc-list a::before {
  content: "›";
  flex-shrink: 0;

  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.1;
}

.toc-list a:hover {
  color: var(--primary-dark);
  background: var(--primary-light);
  border-color: var(--border-dark);
}

/* ---------- DETAILS AND SUMMARY ---------- */

.sec details {
  margin: 14px 0;
  overflow: hidden;

  background: #fbfefd;
  border: 1px solid var(--border);
  border-radius: 11px;

  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.sec details:hover {
  border-color: var(--border-dark);
}

.sec details[open] {
  border-color: var(--border-dark);
  box-shadow: var(--shadow-sm);
}

.sec summary {
  position: relative;
  display: block;

  padding: 16px 46px 16px 18px;

  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.65;

  cursor: pointer;
  list-style: none;
}

.sec summary::-webkit-details-marker {
  display: none;
}

.sec summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 17px;

  color: var(--primary);
  font-size: 23px;
  font-weight: 400;
  line-height: 1;

  transform: translateY(-50%);
}

.sec details[open] > summary {
  background: var(--primary-light);
  border-bottom: 1px solid var(--border);
}

.sec details[open] > summary::after {
  content: "−";
}

.sec details > p,
.sec details > ul,
.sec details > ol {
  margin: 0;
  padding: 16px 19px 19px;
}

.sec details > p {
  color: var(--text-secondary);
}

/* ---------- TABLES ---------- */

.data-table {
  width: 100%;
  margin: 20px 0 25px;

  border-collapse: separate;
  border-spacing: 0;

  border: 1px solid var(--border);
  border-radius: 12px;

  overflow: hidden;
  font-size: 14px;
  line-height: 1.7;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;

  border-bottom: 1px solid var(--border);
}

.data-table th {
  color: var(--primary-dark);
  background: var(--primary-light);

  font-size: 13px;
  font-weight: 800;
}

.data-table td {
  color: var(--text-secondary);
  background: var(--white);
}

.data-table tbody tr:nth-child(even) td {
  background: #f8fdfc;
}

.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover td {
  background: #effbf7;
}

/* ---------- SCREENSHOT GALLERY ---------- */

.arbpay-gallery {
  position: relative;
  margin: 25px 0 15px;
  padding: 24px 48px;

  background: linear-gradient(
    140deg,
    #f0fbf8 0%,
    #e3f8f1 100%
  );

  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.gallery-track {
  display: flex;
  align-items: stretch;
  gap: 18px;

  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;

  padding: 4px 2px 14px;

  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  overscroll-behavior-x: contain;

  scrollbar-width: thin;
  scrollbar-color: var(--primary) #dcefeb;
}

.gallery-track::-webkit-scrollbar {
  height: 6px;
}

.gallery-track::-webkit-scrollbar-track {
  background: #dcefeb;
  border-radius: 10px;
}

.gallery-track::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 10px;
}

.gallery-slide {
  display: flex;
  flex: 0 0 calc((100% - 36px) / 3);
  flex-direction: column;

  min-width: 0;
  padding: 12px;

  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;

  box-shadow: var(--shadow-sm);
  scroll-snap-align: center;
}

.gallery-slide img {
  width: 100%;
  height: 310px;

  object-fit: contain;
  background: #f7fcfa;

  border: 1px solid #edf5f2;
  border-radius: 9px;
}

.gallery-slide h3 {
  margin: 15px 0 5px;

  color: var(--primary-dark);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.5;
}

.gallery-slide p {
  margin: 0 0 5px;

  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.65;
}

.gallery-arrow {
  position: absolute;
  top: 42%;
  z-index: 2;

  display: flex;
  align-items: center;
  justify-content: center;

  width: 38px;
  height: 38px;
  padding: 0;

  color: var(--primary-dark);
  background: var(--white);

  border: 1px solid var(--border-dark);
  border-radius: 50%;

  font-size: 16px;
  line-height: 1;

  box-shadow: var(--shadow-sm);

  transition:
    background-color var(--transition),
    transform var(--transition);
}

.gallery-arrow:hover {
  background: var(--mint);
  transform: scale(1.06);
}

.gallery-prev {
  left: 8px;
}

.gallery-next {
  right: 8px;
}

.gallery-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;

  margin: 17px 0 24px;
}

.gallery-dot {
  display: block;

  width: 9px;
  height: 9px;
  padding: 0;

  background: #c5ded8;
  border: 0;
  border-radius: 50%;

  transition:
    width var(--transition),
    background-color var(--transition);
}

.gallery-dot.active {
  width: 25px;
  background: var(--primary);
  border-radius: 10px;
}

/* ---------- FOOTER ---------- */

footer {
  padding: 36px 30px 25px;

  color: #d7eeeb;
  background: var(--primary-dark);

  border-top: 4px solid var(--mint);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);

  text-align: center;
}

footer p {
  max-width: 820px;
  margin: 0 auto 16px;

  color: #d7eeeb;
  font-size: 13px;
  line-height: 1.9;
}

footer p strong {
  color: var(--white);
}

footer p:first-child strong {
  font-size: 22px;
  letter-spacing: -0.4px;
}

footer a {
  color: var(--mint);
  font-weight: 700;
}

footer a:hover {
  color: var(--white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;

  margin: 24px 0;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 7px 12px;

  color: #e3f7f2;
  background: rgba(255, 255, 255, 0.07);

  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 7px;

  font-size: 12px;
  font-weight: 600;

  transition:
    color var(--transition),
    background-color var(--transition);
}

.footer-links a:hover {
  color: var(--primary-dark);
  background: var(--mint);
}

/* ---------- TABLET RESPONSIVE ---------- */

@media (max-width: 1050px) {
  .shell {
    width: min(100% - 24px, var(--container));
    margin: 12px auto;
  }

  .sticky-nav {
    padding: 12px 20px;
  }

  .dropdown {
    gap: 2px;
  }

  .dropdown a {
    padding: 6px 7px;
    font-size: 11px;
  }

  .hero {
    padding: 55px 26px 42px;
  }

  .sec {
    padding: 30px 27px;
  }

  .gallery-slide {
    flex-basis: calc((100% - 18px) / 2);
  }
}

/* ---------- MOBILE NAVIGATION ---------- */

@media (max-width: 820px) {
  .sticky-nav {
    min-height: 68px;
    padding: 11px 16px;
  }

  .logo img {
    width: 39px;
    height: 39px;
  }

  .logo-name {
    font-size: 22px;
  }

  .hamburger {
    display: flex;
    flex-shrink: 0;
  }

  .dropdown {
    display: none;

    position: absolute;
    top: calc(100% + 7px);
    left: 12px;
    right: 12px;

    max-width: none;
    max-height: min(72vh, 560px);
    overflow-y: auto;

    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    flex-wrap: nowrap;
    gap: 3px;

    padding: 10px;

    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 14px;

    box-shadow: var(--shadow-lg);
  }

  .dropdown.open {
    display: flex;
  }

  .dropdown a {
    justify-content: flex-start;

    width: 100%;
    min-height: 42px;
    padding: 10px 13px;

    color: var(--text);
    font-size: 13px;

    border-radius: 8px;
  }

  .dropdown a:hover,
  .dropdown a:focus-visible {
    color: var(--primary-dark);
    background: var(--primary-light);
  }

  .hero {
    padding: 45px 22px 35px;
  }

  .hero-logo {
    width: 78px;
    height: 78px;
    border-radius: 19px;
  }

  .hero h1 {
    font-size: clamp(26px, 5vw, 36px);
    letter-spacing: -0.7px;
  }

  .hero > p {
    font-size: 15px;
  }

  .sec {
    padding: 28px 22px;
  }

  .toc-list {
    grid-template-columns: 1fr;
  }

  .gallery-slide {
    flex-basis: 75%;
  }
}

/* ---------- SMALL MOBILE ---------- */

@media (max-width: 520px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  .shell {
    width: 100%;
    margin: 0;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .sticky-nav {
    min-height: 63px;
    padding: 10px 14px;
    border-radius: 0;
  }

  .logo {
    gap: 9px;
  }

  .logo img {
    width: 36px;
    height: 36px;
  }

  .logo-name {
    font-size: 21px;
  }

  .dropdown {
    left: 8px;
    right: 8px;
  }

  .hero {
    padding: 37px 17px 30px;
  }

  .hero-logo {
    width: 70px;
    height: 70px;
    margin-bottom: 17px;
    border-radius: 17px;
  }

  .hero h1 {
    font-size: 27px;
    line-height: 1.28;
    letter-spacing: -0.6px;
  }

  .hero > p {
    font-size: 14px;
    line-height: 1.85;
  }

  .btn-row {
    gap: 9px;
    margin: 15px 0;
  }

  .btn {
    min-height: 43px;
    padding: 11px 15px;
    font-size: 13px;
  }

  .hero .note {
    padding: 13px;
    font-size: 12px;
  }

  .sec {
    padding: 25px 17px;
  }

  .sec h2 {
    margin-bottom: 18px;
    font-size: 23px;
  }

  .sec h3 {
    font-size: 17px;
  }

  .sec p,
  .sec li {
    font-size: 14px;
  }

  .note {
    padding: 14px;
    font-size: 13px;
  }

  .toc-list a {
    padding: 11px 12px;
    font-size: 12px;
  }

  .sec summary {
    padding: 14px 39px 14px 13px;
    font-size: 13px;
  }

  .sec summary::after {
    right: 13px;
  }

  .sec details > p,
  .sec details > ul,
  .sec details > ol {
    padding: 13px;
  }

  /* Mobile table horizontal scrolling */
  .data-table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 12px;
  }

  .data-table th,
  .data-table td {
    min-width: 110px;
    padding: 10px;
  }

  .arbpay-gallery {
    margin: 20px -5px 12px;
    padding: 18px 35px;
    border-radius: 13px;
  }

  .gallery-track {
    gap: 12px;
  }

  .gallery-slide {
    flex-basis: 100%;
    padding: 10px;
  }

  .gallery-slide img {
    height: 300px;
  }

  .gallery-slide h3 {
    font-size: 14px;
  }

  .gallery-slide p {
    font-size: 12px;
  }

  .gallery-arrow {
    width: 29px;
    height: 29px;
    font-size: 13px;
  }

  .gallery-prev {
    left: 3px;
  }

  .gallery-next {
    right: 3px;
  }

  footer {
    padding: 29px 16px 22px;
    border-radius: 0;
  }

  footer p {
    font-size: 12px;
  }

  .footer-links {
    gap: 7px;
    margin: 20px 0;
  }

  .footer-links a {
    padding: 7px 9px;
    font-size: 11px;
  }
}

/* ---------- EXTRA SMALL DEVICES ---------- */

@media (max-width: 360px) {
  .hero h1 {
    font-size: 24px;
  }

  .hero {
    padding-right: 13px;
    padding-left: 13px;
  }

  .sec {
    padding-right: 13px;
    padding-left: 13px;
  }

  .btn-row {
    flex-direction: column;
    align-items: stretch;
  }

  .btn-row .btn {
    width: 100%;
  }

  .gallery-slide img {
    height: 260px;
  }
}

/* ---------- ACCESSIBILITY ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}