* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

*::selection {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
}

*::-moz-selection {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
}
* {
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
}

:root {
  /* Modern Color Palette */
  --primary-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --secondary-gradient: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  --accent-gradient: linear-gradient(135deg, #6ee7b7 0%, #34d399 100%);
  --dark-gradient: linear-gradient(135deg, #0c0c0c 0%, #1a1a1a 100%);
  --surface-gradient: linear-gradient(135deg, #1e1e1e 0%, #2a2a2a 100%);

  /* Colors */
  --primary-color: #10b981;
  --secondary-color: #059669;
  --accent-color: #34d399;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a; /* Backgrounds */
  --bg-primary: #0c0c0c;
  --bg-secondary: #1a1a1a;
  --bg-surface: #1e1e1e;
  --bg-glass: rgba(255, 255, 255, 0.05);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 50px rgba(16, 185, 129, 0.3); /* Typography */
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-weight: 400;
  line-height: 1.5;
  cursor: default;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.625rem;
  --radius-2xl: 0.75rem; /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
  --transition-slow: 0.4s ease-out;
}
#preloader {
  background: var(--dark-gradient);
  height: 100vh;
  height: calc(var(--vh, 1vh) * 100); /* Fallback using custom property */
  height: 100dvh; /* Dynamic viewport height for modern browsers */
  width: 100vw;
  position: fixed;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.loader {
  width: 112px;
  height: 112px;
  position: relative;
}

.box1,
.box2,
.box3 {
  border: 3px solid transparent;
  background: var(--primary-gradient);
  background-clip: padding-box;
  box-sizing: border-box;
  position: absolute;
  display: block;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-glow);
}

.box1 {
  width: 112px;
  height: 48px;
  margin-top: 64px;
  margin-left: 0px;
  animation: abox1 4s 1s forwards ease-in-out infinite;
}

.box2 {
  width: 48px;
  height: 48px;
  margin-top: 0px;
  margin-left: 0px;
  animation: abox2 4s 1s forwards ease-in-out infinite;
}

.box3 {
  width: 48px;
  height: 48px;
  margin-top: 0px;
  margin-left: 64px;
  animation: abox3 4s 1s forwards ease-in-out infinite;
}

@keyframes abox1 {
  0% {
    width: 112px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  25% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  50% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }

  75% {
    width: 48px;
    height: 112px;
    margin-top: 0px;
    margin-left: 0px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  100% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }
}

@keyframes abox2 {
  0% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  25% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  50% {
    width: 112px;
    height: 48px;
    margin-top: 0px;
    margin-left: 0px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  75% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  100% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }
}

@keyframes abox3 {
  0% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  12.5% {
    width: 48px;
    height: 48px;
    margin-top: 0px;
    margin-left: 64px;
  }

  25% {
    width: 48px;
    height: 112px;
    margin-top: 0px;
    margin-left: 64px;
  }

  37.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  50% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  62.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  75% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  87.5% {
    width: 48px;
    height: 48px;
    margin-top: 64px;
    margin-left: 64px;
  }

  100% {
    width: 112px;
    height: 48px;
    margin-top: 64px;
    margin-left: 0px;
  }
}

main {
  background: var(--dark-gradient);
  min-height: 100vh;
  min-height: calc(var(--vh, 1vh) * 100); /* Fallback using custom property */
  min-height: 100dvh; /* Dynamic viewport height for modern browsers */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  position: relative;
  overflow: hidden;
}

main::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 25% 25%,
      rgba(16, 185, 129, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 75% 75%,
      rgba(5, 150, 105, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
}

/* Landing page */
.logoContainer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  position: relative;
  z-index: 1;
}

.logoContainer img {
  width: min(40%, 400px);
  height: auto;
  filter: drop-shadow(0 10px 30px rgba(16, 185, 129, 0.3));
  transition: transform var(--transition-slow), filter var(--transition-slow);
}

.logoContainer img:hover {
  transform: scale(1.05) translateY(-5px);
  filter: drop-shadow(0 20px 50px rgba(16, 185, 129, 0.5));
}

.buttonContainer {
  padding: var(--space-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
}

a {
  text-decoration: none;
}

button {
  display: flex;
  align-items: center;
  font-family: "Inter", sans-serif;
  font-weight: 600;
  font-size: 1.8rem;
  padding: 1.6rem 3.2rem;
  color: var(--text-primary);
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-xl);
  letter-spacing: 0.025em;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(255, 255, 255, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left var(--transition-slow);
}

button:hover::before {
  left: 100%;
}

button svg {
  margin-right: 1rem;
  width: 2.4rem;
  height: 2.4rem;
  transform: rotate(30deg);
  transition: transform var(--transition-normal);
}

button span {
  transition: transform var(--transition-normal);
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 25px 50px -12px rgba(16, 185, 129, 0.4),
    0 0 0 1px rgba(255, 255, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

button:hover svg {
  transform: translateX(5px) rotate(90deg);
}

button:hover span {
  transform: translateX(7px);
}

button:active {
  transform: translateY(0);
  transition: transform var(--transition-fast);
}

/* Responsive Design */
@media screen and (max-width: 1920px) {
  html {
    font-size: 60%;
  }
}

@media screen and (max-width: 1200px) {
  html {
    font-size: 58%;
  }

  .logoContainer img {
    width: min(45%, 450px);
  }
}

@media screen and (max-width: 768px) {
  html {
    font-size: 55%;
  }

  .logoContainer img {
    width: min(60%, 300px);
  }

  button {
    font-size: 1.6rem;
    padding: 1.4rem 2.8rem;
  }

  main {
    padding: var(--space-md);
  }
}

@media screen and (max-width: 500px) {
  html {
    font-size: 52%;
  }

  .logoContainer img {
    width: min(80%, 250px);
  }

  button {
    font-size: 1.5rem;
    padding: 1.2rem 2.4rem;
  }

  button svg {
    width: 2rem;
    height: 2rem;
  }
}

@media screen and (max-width: 375px) {
  html {
    font-size: 50%;
  }

  .logoContainer img {
    width: min(90%, 200px);
  }

  button {
    font-size: 1.4rem;
    padding: 1rem 2rem;
  }
}

@media screen and (max-width: 320px) {
  html {
    font-size: 48%;
  }

  button {
    font-size: 1.3rem;
    padding: 0.8rem 1.6rem;
  }
}