:root {
  --navy: #132238;
  --blue: #2864d8;
  --teal: #10a5a7;
  --yellow: #ffc857;
  --coral: #ff7b54;
  --mint: #e6fbf6;
  --cream: #fbf3e7;
  --paper: #f7fbff;
  --white: #ffffff;
  --ink: #182230;
  --muted: #667085;
  --line: #dce6f2;
  --photo-bg: #fbf3e7;
  --deep: #071e63;
  --whatsapp: #22c35e;
  --shadow: 0 22px 55px rgba(19, 34, 56, 0.13);
  --shadow-sm: 0 16px 35px rgba(19, 34, 56, 0.08);
  --shadow-lift: 0 26px 50px rgba(19, 34, 56, 0.14);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --gutter: clamp(16px, 5vw, 72px);
  --header-h: 80px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

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

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

button {
  -webkit-tap-highlight-color: transparent;
}

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

svg {
  display: block;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--white);
  background: var(--navy);
  border-radius: 10px;
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: none;
}

main:focus {
  outline: none;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
  padding: 0 var(--gutter);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  backdrop-filter: saturate(160%) blur(16px);
  transition: height 0.35s var(--ease), box-shadow 0.35s var(--ease), background-color 0.35s var(--ease);
}

.site-header.is-scrolled {
  --header-h: 66px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 30px rgba(19, 34, 56, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 8px 0;
}

.brand img {
  width: auto;
  height: 100%;
  max-height: 62px;
  object-fit: contain;
  transition: transform 0.35s var(--ease);
}

.brand:hover img {
  transform: scale(1.04);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
  color: var(--navy);
  font-weight: 700;
}

.nav-links a:not(.nav-button) {
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-links a:not(.nav-button)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.nav-links a:not(.nav-button):hover {
  color: var(--blue);
}

.nav-links a:not(.nav-button):hover::after {
  transform: scaleX(1);
}

/* ---------- Buttons ---------- */

.nav-button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  border: 2px solid transparent;
  font-weight: 800;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  will-change: transform;
}

.nav-button,
.button-dark {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--teal));
  box-shadow: 0 13px 28px rgba(40, 100, 216, 0.22);
}

.nav-button:hover,
.button-dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(40, 100, 216, 0.3);
}

.button-light {
  color: var(--navy);
  background: var(--white);
  border-color: var(--line);
}

.button-light:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
  color: var(--blue);
}

.nav-button:active,
.button:active,
.view-more:active,
.send-button:active {
  transform: translateY(0) scale(0.98);
}

.menu-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
}

.menu-toggle span {
  position: absolute;
  left: 13px;
  right: 13px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s ease;
}

.menu-toggle span:nth-child(1) { top: 16px; }
.menu-toggle span:nth-child(2) { top: 22px; }
.menu-toggle span:nth-child(3) { top: 28px; }

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.9fr);
  align-items: center;
  gap: clamp(28px, 5vw, 76px);
  min-height: calc(100svh - var(--header-h));
  padding: clamp(38px, 6vw, 78px) var(--gutter);
  background:
    radial-gradient(circle at 7% 16%, rgba(255, 200, 87, 0.42), transparent 28%),
    radial-gradient(circle at 90% 12%, rgba(16, 165, 167, 0.24), transparent 34%),
    linear-gradient(180deg, #eff8ff 0%, #ffffff 100%);
}

.hero-copy {
  max-width: 700px;
}

.kicker,
.section-title span {
  display: inline-flex;
  margin-bottom: 13px;
  color: var(--blue);
  font-size: clamp(0.92rem, 1.2vw, 1.1rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  color: var(--navy);
  font-size: clamp(2.35rem, 5.4vw, 4.9rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(1.75rem, 3.6vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 1.17rem;
  line-height: 1.25;
}

.hero-copy p,
.about-panel,
.why-card p,
.services-grid p {
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-art {
  position: relative;
  width: 100%;
  max-width: 640px;
  justify-self: center;
  padding: clamp(12px, 2vw, 22px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-art::before {
  content: "";
  position: absolute;
  inset: auto 9% -18px 9%;
  height: 42px;
  background: rgba(40, 100, 216, 0.17);
  border-radius: 999px;
  filter: blur(14px);
  z-index: -1;
}

.hero-art img {
  width: 100%;
  aspect-ratio: 1436 / 954;
  object-fit: cover;
  border-radius: 18px;
  background: #e9eef5;
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(56px, 7vw, 96px) var(--gutter);
}

.section-title {
  max-width: 900px;
}

.section-title.centered {
  margin-inline: auto;
  text-align: center;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: clamp(30px, 6vw, 86px);
  background: var(--white);
}

.about .section-title h2 {
  margin-bottom: 0;
}

.about-panel {
  padding: clamp(24px, 4vw, 40px);
  background: linear-gradient(135deg, var(--cream), var(--mint));
  border: 1px solid var(--line);
  border-radius: 24px;
}

.about-panel p:last-child {
  margin-bottom: 0;
}

.why {
  background:
    linear-gradient(90deg, rgba(255, 200, 87, 0.15), rgba(16, 165, 167, 0.13)),
    var(--paper);
}

.why-grid,
.services-grid {
  display: grid;
  gap: 20px;
  max-width: 1320px;
  margin: 34px auto 0;
}

.why-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.why-card,
.services-grid article {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.why-card:hover,
.services-grid article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}

.why-card {
  padding: 32px 24px;
  text-align: center;
}

.why-card p {
  margin-bottom: 0;
}

.why-card:nth-child(2) {
  background: #f3fff6;
}

.why-card:nth-child(3) {
  background: #fff8df;
}

.why-card:nth-child(4) {
  background: #f0f7ff;
}

.why-card img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin: 0 auto 20px;
}

/* ---------- Photo sections ---------- */

.photo-title {
  max-width: 1100px;
  margin: 0 auto 42px;
  text-align: center;
}

.photo-title h2 {
  margin-bottom: 20px;
  color: #050505;
  font-family: "Bebas Neue", Impact, "Arial Black", Inter, sans-serif;
  font-size: clamp(2.1rem, 3.6vw, 3.6rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.photo-title p {
  max-width: 900px;
  margin-inline: auto;
  color: #173b4b;
  font-size: clamp(1rem, 1.45vw, 1.25rem);
  line-height: 1.65;
}

.photo-title.narrow {
  max-width: 850px;
  margin-bottom: 36px;
}

.universities,
.grades,
.plagiarism {
  background: var(--photo-bg);
}

.grades {
  padding-top: 0;
}

.university-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: clamp(24px, 5vw, 64px);
  max-width: 1220px;
  margin: 0 auto;
}

/* Logos are transparent PNG/WebP — sit them directly on the cream section background */
.university-grid article {
  text-align: center;
  background: transparent;
}

.university-grid h3,
.plagiarism-block h3,
.plagiarism-final {
  margin-bottom: 22px;
  color: #030303;
  font-family: Pacifico, "Brush Script MT", "Segoe Script", cursive;
  font-size: clamp(1.6rem, 2.35vw, 2.4rem);
  font-weight: 400;
  line-height: 1.2;
}

.university-grid img {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  margin: 0 auto;
}

/* ---------- Grade carousel ---------- */

.grade-carousel {
  position: relative;
  margin-inline: calc(var(--gutter) * -1);
}

.grade-rail {
  display: flex;
  gap: clamp(16px, 2vw, 26px);
  padding: 8px var(--gutter) 28px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: var(--gutter);
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(19, 34, 56, 0.35) transparent;
}

.grade-rail::-webkit-scrollbar {
  height: 8px;
}

.grade-rail::-webkit-scrollbar-track {
  background: transparent;
}

.grade-rail::-webkit-scrollbar-thumb {
  background: rgba(19, 34, 56, 0.3);
  border-radius: 999px;
}

.grade-card {
  flex: 0 0 clamp(250px, 24vw, 340px);
  aspect-ratio: 0.86 / 1;
  padding: 10px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 14px 32px rgba(19, 34, 56, 0.1);
  scroll-snap-align: start;
  cursor: zoom-in;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.grade-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 22px 42px rgba(19, 34, 56, 0.16);
}

.grade-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center top;
  border-radius: 8px;
}

.rail-arrow {
  position: absolute;
  top: calc(50% - 14px);
  z-index: 2;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: 0 10px 24px rgba(19, 34, 56, 0.16);
  cursor: pointer;
  transform: translateY(-50%);
  transition: opacity 0.25s ease, transform 0.25s var(--ease), background-color 0.2s ease;
}

.rail-arrow svg {
  width: 22px;
  height: 22px;
}

.rail-arrow:hover {
  background: var(--white);
  transform: translateY(-50%) scale(1.08);
}

.rail-arrow[disabled] {
  opacity: 0;
  pointer-events: none;
}

.rail-prev {
  left: calc(var(--gutter) / 2);
}

.rail-next {
  right: calc(var(--gutter) / 2);
}

.view-more {
  display: table;
  margin: 18px auto 0;
  color: var(--white);
  background: #5261a6;
  border-radius: 12px;
  padding: 15px 26px;
  font-weight: 900;
  font-size: clamp(1.02rem, 1.5vw, 1.35rem);
  box-shadow: 0 14px 28px rgba(82, 97, 166, 0.24);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.25s ease;
}

.view-more:hover {
  background: #45559a;
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(82, 97, 166, 0.32);
}

/* ---------- Plagiarism ---------- */

.plagiarism {
  text-align: center;
}

.plagiarism-block {
  max-width: 850px;
  margin: 0 auto 56px;
}

.plagiarism-block p {
  margin-inline: auto;
  color: #173b4b;
  font-size: clamp(0.98rem, 1.25vw, 1.12rem);
  line-height: 1.72;
}

.plagiarism-block img {
  width: min(460px, 78vw);
  max-height: 200px;
  object-fit: contain;
  margin: 32px auto 0;
}

.plagiarism-final {
  margin: 0 auto;
}

/* ---------- Services ---------- */

.services {
  background:
    radial-gradient(circle at 85% 18%, rgba(255, 200, 87, 0.3), transparent 30%),
    #f5fbff;
}

.services-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.services-grid article {
  grid-column: span 2;
  padding: 30px;
  border-top: 7px solid var(--blue);
}

.services-grid article:nth-child(4) {
  grid-column: 2 / span 2;
}

.services-grid p {
  margin-bottom: 0;
}

.services-grid article:nth-child(2) {
  border-top-color: var(--teal);
}

.services-grid article:nth-child(3) {
  border-top-color: var(--yellow);
}

.services-grid article:nth-child(4) {
  border-top-color: var(--coral);
}

.services-grid article:nth-child(5) {
  border-top-color: #7c5cff;
}

/* ---------- Contact ---------- */

.contact-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1fr);
  gap: clamp(36px, 6vw, 82px);
  padding: clamp(62px, 8vw, 96px) var(--gutter);
  background: var(--white);
}

.contact-info {
  padding-top: 10px;
}

.contact-info > span {
  display: inline-flex;
  margin-bottom: 8px;
  color: #b45309;
  font-size: 0.88rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-info h2 {
  margin-bottom: 18px;
  color: var(--deep);
  font-size: clamp(2rem, 3.3vw, 3.25rem);
  line-height: 1.05;
}

.contact-info > p {
  max-width: 520px;
  color: #56658f;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.contact-list {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.contact-list a,
.contact-list p {
  display: flex;
  align-items: center;
  gap: 14px;
  width: fit-content;
  max-width: 100%;
  margin: 0;
  color: var(--deep);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.contact-list a {
  transition: color 0.2s ease, transform 0.25s var(--ease);
}

.contact-list a:hover {
  color: var(--blue);
  transform: translateX(4px);
}

.contact-icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  background: #f1f5ff;
  border-radius: 50%;
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.is-whatsapp {
  color: var(--whatsapp);
}

.is-mail {
  color: #f59a16;
}

.is-clock {
  color: var(--deep);
}

.requirement-form {
  padding: clamp(24px, 4vw, 36px);
  background: #f5f7fc;
  border: 1px solid #e6ecf7;
  border-radius: 26px;
  box-shadow: 0 24px 60px rgba(7, 30, 99, 0.1);
}

.requirement-form h3 {
  margin-bottom: 24px;
  color: var(--deep);
  font-size: clamp(1.25rem, 1.8vw, 1.6rem);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.form-grid label {
  display: grid;
  gap: 8px;
  color: var(--deep);
  font-weight: 700;
  font-size: 0.95rem;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.form-grid input,
.form-grid textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  color: var(--deep);
  font-size: 1rem;
  background: var(--white);
  border: 1px solid #d8e1f2;
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  -webkit-appearance: none;
  appearance: none;
}

.form-grid input:hover,
.form-grid textarea:hover {
  border-color: #b9c7e3;
}

.form-grid textarea {
  min-height: 134px;
  resize: vertical;
}

.form-grid input:focus,
.form-grid textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(40, 100, 216, 0.14);
}

.send-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 22px;
  min-height: 50px;
  min-width: 132px;
  padding: 0 24px;
  color: var(--white);
  background: var(--deep);
  border: 0;
  border-radius: 12px;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background-color 0.2s ease, opacity 0.2s ease;
}

.send-button:hover {
  background: #0b2a85;
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(7, 30, 99, 0.25);
}

.send-button:disabled {
  opacity: 0.75;
  cursor: progress;
  transform: none;
}

.send-icon {
  width: 18px;
  height: 18px;
}

.send-button.is-loading .send-icon {
  animation: send-pulse 0.9s ease-in-out infinite alternate;
}

@keyframes send-pulse {
  from { transform: translate(0, 0); opacity: 1; }
  to { transform: translate(3px, -3px); opacity: 0.55; }
}

.form-message {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.95rem;
  text-align: center;
  animation: fade-up 0.4s var(--ease);
}

.form-message:empty {
  display: none;
}

.form-message.success {
  color: #166534;
  background-color: #dcfce7;
  border: 1px solid #bbf7d0;
}

.form-message.error {
  color: #991b1b;
  background-color: #fef2f2;
  border: 1px solid #fecaca;
}

.form-message.success::before {
  content: "\2713";
  font-weight: 900;
}

.form-message.error::before {
  content: "\2715";
  font-weight: 900;
}

/* ---------- Footer ---------- */

.site-footer {
  display: grid;
  grid-template-columns: minmax(230px, 1.2fr) minmax(150px, 0.9fr) minmax(190px, 1fr) minmax(240px, 1.1fr);
  gap: clamp(30px, 6vw, 80px);
  padding: clamp(44px, 5vw, 64px) var(--gutter) calc(clamp(44px, 5vw, 64px) + env(safe-area-inset-bottom));
  color: #dce9ff;
  background: #071735;
}

.footer-brand a {
  display: inline-flex;
  width: 132px;
  padding: 10px;
  background: var(--white);
  border-radius: 18px;
  transition: transform 0.3s var(--ease);
}

.footer-brand a:hover {
  transform: translateY(-3px);
}

.footer-brand img {
  width: 100%;
  height: auto;
}

.footer-brand p {
  max-width: 300px;
  margin: 18px 0 22px;
  color: #dce9ff;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  display: grid;
  place-items: center;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  color: #dce9ff;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color 0.25s ease, color 0.25s ease, transform 0.25s var(--ease);
}

.footer-socials a:hover {
  color: #071735;
  background: #ff9d00;
  transform: translateY(-3px);
}

.footer-socials svg {
  width: 20px;
  height: 20px;
}

.footer-column {
  display: grid;
  align-content: start;
  gap: 10px;
}

.footer-column h3 {
  margin-bottom: 8px;
  color: #ff9d00;
  font-size: 1.05rem;
}

.footer-column a,
.footer-column p {
  width: fit-content;
  margin: 0;
  color: #dce9ff;
  font-weight: 500;
  transition: color 0.2s ease, transform 0.25s var(--ease);
}

.footer-column a:hover {
  color: #ff9d00;
  transform: translateX(3px);
}

.contact-footer a,
.contact-footer p {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-wrap: anywhere;
}

.footer-icon {
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.contact-footer .is-clock {
  color: #ff9d00;
}

/* ---------- WhatsApp float ---------- */

.whatsapp-float {
  position: fixed;
  right: 18px;
  bottom: calc(18px + env(safe-area-inset-bottom));
  z-index: 25;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 20px 0 16px;
  color: var(--white);
  background: #15803d;
  border-radius: 999px;
  font-weight: 900;
  box-shadow: 0 12px 30px rgba(21, 128, 61, 0.35);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.whatsapp-float svg {
  width: 22px;
  height: 22px;
}

.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 18px 36px rgba(21, 128, 61, 0.42);
  background: #166534;
}

/* ---------- Lightbox ---------- */

.lightbox {
  width: 100vw;
  max-width: 100vw;
  height: 100dvh;
  max-height: 100dvh;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--white);
  overflow: hidden;
}

.lightbox::backdrop {
  background: rgba(7, 23, 53, 0.86);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.lightbox[open] {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 64px clamp(8px, 3vw, 32px) 28px;
  animation: fade-in 0.3s var(--ease);
}

.lightbox figure {
  display: grid;
  justify-items: center;
  gap: 12px;
  min-width: 0;
  height: 100%;
  margin: 0;
}

.lightbox-img {
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: calc(100dvh - 140px);
  align-self: center;
  object-fit: contain;
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.4);
  animation: zoom-in 0.35s var(--ease);
}

.lightbox-count {
  font-weight: 700;
  font-size: 0.95rem;
  opacity: 0.85;
}

.lightbox-close,
.lightbox-nav {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.25s var(--ease);
}

.lightbox-close:hover,
.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.26);
  transform: scale(1.06);
}

.lightbox-close svg,
.lightbox-nav svg {
  width: 22px;
  height: 22px;
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
}

body.lightbox-open {
  overflow: hidden;
}

/* ---------- Motion ---------- */

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@keyframes zoom-in {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: none; }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}

/* Above-the-fold hero: pure CSS so it never waits on JavaScript */
.enter {
  animation: rise-in 0.8s var(--ease) both;
  animation-delay: var(--d, 0s);
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Hover lift must not fight the reveal transform */
.js .why-card.reveal.is-visible,
.js .services-grid article.reveal.is-visible {
  transition: opacity 0.7s var(--ease), transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
  transition-delay: 0s;
}

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .why-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1020px) {
  .hero,
  .about,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-art {
    max-width: 720px;
  }

  .services-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .services-grid article,
  .services-grid article:nth-child(4) {
    grid-column: auto;
  }

  .services-grid article:nth-child(5) {
    grid-column: 1 / -1;
  }

  .site-footer {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  :root {
    --header-h: 68px;
  }

  .site-header.is-scrolled {
    --header-h: 60px;
  }

  .brand img {
    max-height: 50px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 8px);
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top center;
    transition: opacity 0.25s var(--ease), transform 0.3s var(--ease), visibility 0s linear 0.3s;
  }

  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: opacity 0.25s var(--ease), transform 0.3s var(--ease), visibility 0s;
  }

  .nav-links a:not(.nav-button) {
    padding: 12px 10px;
    border-radius: 10px;
  }

  .nav-links a:not(.nav-button)::after {
    display: none;
  }

  .nav-links a:not(.nav-button):hover {
    background: var(--paper);
  }

  .nav-button {
    margin-top: 6px;
  }

  h1 {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }

  .hero {
    padding-top: 32px;
  }

  .hero-actions .button {
    flex: 1 1 140px;
  }

  .hero-art,
  .about-panel {
    border-radius: 22px;
  }

  .why-grid,
  .services-grid,
  .university-grid {
    grid-template-columns: 1fr;
  }

  .services-grid article:nth-child(5) {
    grid-column: auto;
  }

  .why-card {
    padding: 26px 22px;
  }

  .services-grid article {
    padding: 24px;
  }

  .grade-card {
    flex-basis: min(76vw, 300px);
  }

  .rail-arrow {
    display: none;
  }

  .contact-section {
    padding-block: 48px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .requirement-form {
    padding: 22px;
    border-radius: 20px;
  }

  .send-button {
    width: 100%;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
  }

  .whatsapp-float {
    right: 14px;
    min-height: 48px;
    padding: 0 16px 0 14px;
  }

  .lightbox[open] {
    grid-template-columns: 1fr;
    padding: 64px 10px 20px;
  }

  .lightbox-nav {
    position: absolute;
    bottom: 18px;
  }

  .lightbox-prev {
    left: 18px;
  }

  .lightbox-next {
    right: 18px;
  }

  .lightbox-img {
    max-height: calc(100dvh - 170px);
  }
}

@media (hover: none) {
  .why-card:hover,
  .services-grid article:hover,
  .grade-card:hover {
    transform: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0s !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}