/* ===== Modern CSS Reset ===== */

/* 1. Use a more intuitive box-sizing model */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* 2. Remove default margin and padding */
* {
  margin: 0;
  padding: 0;
}

/* 3. Improve text rendering */
html {
  -webkit-text-size-adjust: 100%; /* Prevent font scaling in landscape */
  text-size-adjust: 100%;
}

/* 4. Set core body defaults */
body {
  line-height: 1.5;
  font-family: system-ui, sans-serif;
  background-color: #fff;
  color: #000;
  /* ============== */
  flex-direction: column;
  gap: 1rem;
  height: 100vh;
}

/* 5. Remove list styles */
/* ul, ol {
  list-style: none;
} */

/* 6. Remove default link styles */
a {
  text-decoration: none;
  color: inherit;
}

/* 7. Make images easier to work with */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

/* 8. Inherit fonts for form controls */
input,
button,
textarea,
select {
  font: inherit;
}

/* 9. Remove animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.flex {
  display: flex;
}

/* poppins font style */
.poppins-extralight {
  font-family: "Poppins", sans-serif;
  font-weight: 200;
  font-style: normal;
}

.poppins-light {
  font-family: "Poppins", sans-serif;
  font-weight: 300;
  font-style: normal;
}

.poppins-regular {
  font-family: "Poppins", sans-serif;
  font-weight: 400;
  font-style: normal;
}

.poppins-medium {
  font-family: "Poppins", sans-serif;
  font-weight: 500;
  font-style: normal;
}

.poppins-semibold {
  font-family: "Poppins", sans-serif;
  font-weight: 600;
  font-style: normal;
}

.poppins-bold {
  font-family: "Poppins", sans-serif;
  font-weight: 700;
  font-style: normal;
}

.poppins-extrabold {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-style: normal;
}

.poppins-black {
  font-family: "Poppins", sans-serif;
  font-weight: 900;
  font-style: normal;
}
.poppins-thin-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 100;
  font-style: italic;
}

.poppins-extralight-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 200;
  font-style: italic;
}

.poppins-light-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 300;
  font-style: italic;
}

.poppins-regular-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 400;
  font-style: italic;
}

.poppins-medium-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 500;
  font-style: italic;
}

.poppins-semibold-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 600;
  font-style: italic;
}

.poppins-bold-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 700;
  font-style: italic;
}

.poppins-extrabold-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 800;
  font-style: italic;
}

.poppins-black-italic {
  font-family: "Poppins", sans-serif;
  font-weight: 900;
  font-style: italic;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type="number"] {
  -moz-appearance: textfield;
}

/* ===================================================== */
header {
  flex-grow: 0;
  padding: 10px 5%;
  background-color: #f5f4f4;
}
.error {
  position: absolute;
  top: 20px;
  left: 50%;

  /* 
    1. Perspective first (gives the 3D depth)
    2. translate(-50%, -40px) keeps it centered X, and pushes it up Y
    3. rotateX(-90deg) folds it flat upwards
    4. scale(0.8) shrinks it slightly 
  */
  transform: perspective(600px) translate(-50%, -40px) rotateX(-90deg)
    scale(0.8);

  /* This is the secret sauce: it acts as the hinge at the top edge */
  transform-origin: top center;

  background-color: #f8d7da;
  color: #842029;
  border: 1px solid #f5c2c7;
  padding: 0.75rem 1.25rem;
  border-radius: 0.375rem;
  max-width: 600px;
  width: 95%;
  display: flex;

  /* I added a cubic-bezier timing function for a really smooth, natural drop */
  transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  opacity: 0;
}

.error.active {
  /* Bring it down to 0px Y, flatten the rotation to 0deg, and scale to normal */
  transform: perspective(600px) translate(-50%, 0) rotateX(0deg) scale(1);
  opacity: 1;
}
.brand {
  font-size: 30px;
}
.container {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  gap: 30px;
}
.tip-info {
  flex-direction: column;

  /* gap: 10px; */

  flex-grow: 1.5;
}
.info-list {
  margin-left: 20px;
}
.tip-container {
  background-color: #f5f4f4;
  padding: 20px;
  flex-direction: column;
  gap: 10px;
  flex-grow: 2;
  justify-content: center;
}
.output {
  border: 5px dashed #dcdbdb;
  border-radius: 10px;
  padding: 5px 10px;
  display: none;
  margin-bottom: 20px;
}
form {
  flex-direction: column;
  gap: 10px;
}
fieldset {
  border: none;
  flex-direction: column;
  gap: 10px;
}
.preset-btn-container button {
  cursor: pointer;
  padding: 5px 10px;
  margin: 2px;
  border: 1px solid #ccc;
  border-radius: 4px;
  transition: 0.25s all ease-in-out;
}

.preset-btn-container button:hover {
  background-color: #f0f0f0;
  border-color: #888;
}
.preset-btn-container .active {
  border-color: #888;
}

input[type="number"] {
  outline: none;
  border: none;
  border-radius: 5px;
  padding: 10px;
}
input[type="submit"] {
  color: rgb(249, 249, 249);
  background-color: #141414;
  border: none;
  border-radius: 5px;
  padding: 20px;
  transition: 0.25s ease-in-out;
  cursor: pointer;
}
input[type="submit"]:hover {
  background-color: #141414;
}
input[type="submit"]:active {
  transform: scale(0.9);
}
@media (min-width: 1025px) {
  header {
    padding: 30px 5%;
  }
  .container {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    padding-inline: 10%;
  }
  .tip-container {
    min-width: 400px;
    border-radius: 10px;
  }
}
@media (min-width: 1400px) {
  .tip-container {
    min-width: 600px;
  }
}
@media (min-height: 1000px) and (max-width: 1025px) {
  .tip-info {
    justify-content: space-evenly;
  }
  form {
    justify-content: space-evenly;
    flex-grow: 2;
  }
}
@media (max-width: 1025px) {
  .tip-info {
    padding-inline: 20px;
  }
}
@media (max-height: 1000px) {
  .tip-info {
    gap: 10px;
  }
}