:root {
  --dm-bg: #f4f7fb;
  --dm-surface: #ffffff;
  --dm-surface-soft: #eef3fb;
  --dm-text: #14213d;
  --dm-muted: #4a5568;
  --dm-primary: #2563eb;
  --dm-primary-strong: #1d4ed8;
  --dm-accent: #0f766e;
  --dm-border: #d8e0ef;
  --dm-shadow: 0 10px 30px rgba(17, 24, 39, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: Arial, sans-serif;
  background:
    radial-gradient(circle at 0% 0%, #dbeafe 0%, transparent 35%),
    radial-gradient(circle at 100% 100%, #ccfbf1 0%, transparent 32%),
    var(--dm-bg);
  color: var(--dm-text);
  line-height: 1.45;
}

img,
canvas,
iframe,
video {
  max-width: 100%;
}

a {
  color: var(--dm-primary-strong);
}

:where(.container, .content, .wrapper, .main, .card) {
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

body.dm-theme {
  animation: dm-page-enter 180ms ease-out;
}

body.dm-page-leave {
  opacity: 0.86;
  transform: translateY(2px);
  transition: opacity 130ms ease, transform 130ms ease;
}

:where(a.button, button, .button, .portal-button, .main-button, .sub-button, .pdf-button, .fixed-button, .back-btn) {
  border: 1px solid transparent;
  border-radius: 12px;
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

:where(a.button, button, .button, .portal-button, .main-button, .sub-button, .pdf-button) {
  box-shadow: var(--dm-shadow);
}

:where(a.button, button, .button, .portal-button, .main-button, .sub-button, .pdf-button):hover {
  transform: translateY(-1px);
  filter: brightness(1.02);
}

:where(.fixed-button, .back-btn) {
  background-color: var(--dm-primary);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

:where(.fixed-button, .back-btn):hover {
  background-color: var(--dm-primary-strong);
}

:where(.header, h1, h2, h3) {
  color: var(--dm-text);
}

:where(.solution, .container, .card, iframe) {
  border-color: var(--dm-border);
}

.dm-topbar {
  position: sticky;
  top: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--dm-border);
}

.dm-topbar a,
.dm-topbar button {
  text-decoration: none;
  font-size: 0.95rem;
  padding: 8px 12px;
  background: var(--dm-primary);
  color: #fff;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}

.dm-topbar .dm-title {
  color: var(--dm-muted);
  font-weight: 700;
  font-size: 0.95rem;
  margin-left: auto;
}

.dm-menu-page #animationCanvas {
  opacity: 0 !important;
  pointer-events: none !important;
}

.dm-menu-page .shape,
.dm-menu-page .circle,
.dm-menu-page .triangle,
.dm-menu-page .square,
.dm-menu-page .parallelogram,
.dm-menu-page .trapezoid {
  display: none !important;
}

.dm-menu-page :where(.container, .button-grid, .button-wrapper, nav) {
  position: relative;
  z-index: 2;
}

.dm-watermark {
  position: fixed;
  left: 50%;
  top: 54%;
  transform: translate(-50%, -50%) rotate(-14deg);
  z-index: 1;
  pointer-events: none;
  user-select: none;
  opacity: 0.16;
}

.dm-watermark__label {
  display: inline-block;
  padding: 16px 38px;
  border-radius: 12px;
  background: #2196f3;
  color: #ffffff;
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  letter-spacing: 0.02em;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
}

.button-container2 {
  position: relative;
  margin: -40px auto 20px auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  grid-gap: 20px;
  padding: 20px;
  z-index: 10;
}

.button2 {
  padding: 15px 20px;
  background-color: #0c075e;
  color: #fff;
  text-align: center;
  text-decoration: none;
  border-radius: 5px;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.button2:hover {
  background-color: #215291;
}

@keyframes dm-page-enter {
  from {
    opacity: 0;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  :where(.container) {
    padding-left: 12px;
    padding-right: 12px;
  }

  :where(a.button, button, .button, .portal-button, .main-button, .sub-button, .pdf-button) {
    font-size: clamp(0.95rem, 2.8vw, 1.05rem);
  }
}

@media (max-width: 640px) {
  :where(.container, .content, .wrapper, .main, .card) {
    width: calc(100% - 16px);
  }

  .dm-topbar {
    flex-wrap: wrap;
  }

  .dm-topbar .dm-title {
    width: 100%;
    margin-left: 0;
  }

  .dm-watermark {
    top: 58%;
    opacity: 0.12;
  }

  .dm-watermark__label {
    padding: 12px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body.dm-theme,
  body.dm-page-leave {
    animation: none;
    transition: none;
  }
}