:root {
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
  --md-sys-elevation-2: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: light) {
  :root {
    --md-sys-color-background: #fdfcff;
    --md-sys-color-surface-dim: rgba(255, 255, 255, 0.75);
    --md-sys-color-primary: #0061a4;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-secondary-container: #d1e4ff;
    --md-sys-color-on-secondary-container: #001d36;
    --md-sys-color-outline: #74777f;
    --md-sys-color-on-surface: #1a1c1e;
    --md-sys-color-on-surface-variant: #43474e;
    --clock-text-color: #1a1c1e;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-sys-color-background: #1a1c1e;
    --md-sys-color-surface-dim: rgba(26, 28, 30, 0.65);
    --md-sys-color-primary: #9ecaff;
    --md-sys-color-on-primary: #003258;
    --md-sys-color-secondary-container: #20497d;
    --md-sys-color-on-secondary-container: #d1e4ff;
    --md-sys-color-outline: #8e9099;
    --md-sys-color-on-surface: #e2e2e6;
    --md-sys-color-on-surface-variant: #c4c6cf;
    --clock-text-color: #ffffff;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: "Roboto", sans-serif;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  transition: background-color 0.3s, color 0.3s;
  isolation: isolate;
}

canvas#lines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 2s ease;
  background-color: transparent !important;
  color-scheme: light dark;
  filter: none !important;
  mix-blend-mode: normal;
}

.clock-char {
  position: fixed;
  top: 0;
  left: 0;
  text-align: center;
  font-family: 'Roboto Mono', monospace;
  font-weight: bold;
  pointer-events: none;
  z-index: 9999;
  will-change: transform;
}

.clock-date {
  font-size: 14px;
  color: var(--clock-text-color);
}

.clock-face {
  font-size: 12px;
  color: var(--md-sys-color-primary);
}

.clock-time {
  font-size: 16px;
  color: var(--clock-text-color);
}

.container {
  position: relative;
  z-index: 10;
  width: 90%;
  max-width: 380px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  background: var(--md-sys-color-surface-dim);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--md-sys-shape-corner-extra-large);
  border: 1px solid var(--md-sys-color-outline);
  box-shadow: var(--md-sys-elevation-2);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s cubic-bezier(0.2, 0.0, 0, 1.0) forwards;
}

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

.header h2 {
  font-weight: 400;
  font-size: 1.6rem;
  color: var(--md-sys-color-on-surface);
  text-align: center;
  letter-spacing: 0.5px;
}

.btn-group {
  display: flex;
  flex-direction: column;
  width: 100%;
  gap: 14px;
}

.md3-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-left: 24px;
  width: 100%;
  height: 52px;
  border-radius: var(--md-sys-shape-corner-full);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: transform 0.1s, box-shadow 0.2s, background-color 0.2s;
  overflow: hidden;
  cursor: pointer;
  border: none;
  gap: 16px;
}

.md3-btn .material-symbols-outlined,
.md3-btn .si {
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.md3-btn .si {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.md3-btn-filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.md3-btn-filled:active {
  transform: scale(0.97);
}

.md3-btn-tonal {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.md3-btn-tonal:active {
  transform: scale(0.97);
}

.md3-btn-outlined {
  background-color: transparent;
  border: 1px solid var(--md-sys-color-outline);
  color: var(--md-sys-color-primary);
}

.md3-btn-outlined:hover {
  background-color: rgba(0, 97, 164, 0.08);
  border-color: var(--md-sys-color-primary);
}

.md3-btn::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 10%, transparent 10.01%);
  background-size: 0% 0%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  opacity: 0;
  transition: .3s;
  pointer-events: none;
}

.md3-btn:active::after {
  background-size: 250% 250%;
  opacity: 1;
  transition: 0s;
}

footer {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
  text-align: center;
  opacity: 0.8;
}