:root {
  --font-color: #f5f5f5;
  --background-color: #030303;
  --btn-bg-color: #292929;
  --btn-hover-bg-color: #333333;
  --del-btn-hover-bg-color: #af0000;
  --border-color: #979797;
  --col-border-color: #161616;
  --dlg-box-bg-color: #161616e0;


  /* padding */
  --padding-sm: 5px;
  --padding-md: 10px;
  --padding-lg: 15px;
  --padding-xl: 20px;
  --nav-padding: 15px 30px;
  --sec-padding: 15px 30px;

  /* border radius */
  --border-radius-sm: 5px;
  --border-radius-md: 10px;
  --border-radius-lg: 15px;
  --border-radius-xl: 20px;

  /* gap */
  --gap-sm: 5px;
  --gap-md: 10px;
  --gap-lg: 15px;
  --gap-xl: 20px;
  --gap-xxl: 25px;

  /* margin */
  --margin-sm: 5px;
  --margin-md: 10px;
  --margin-lg: 15px;
  --margin-xl: 20px;
  --margin-xxl: 25px;

}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Roboto", sans-serif;
}

html,
body {
  height: 100%;
  width: 100%;
  background-color: var(--background-color);
  color: var(--font-color);
}

main {
  display: flex;
  flex-direction: column;
  height: 100%;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--nav-padding);
  border-bottom: 3px solid #979797;
}

nav button {
  background-color: var(--btn-bg-color);
  color: var(--font-color);
  border: none;
  padding: var(--padding-md) var(--padding-lg);
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease-in-out;
}

nav button:hover {
  background-color: var(--btn-hover-bg-color);
  border-radius: var(--border-radius-md);
}

section {
  padding: var(--sec-padding);
  display: flex;
  justify-content: space-between;
  gap: var(--gap-lg);
  background-color: #4402fc;
  flex-grow: 1;
  transition: all 0.3s ease-in-out;
}

.dark-theme {
  background-color: #1e1e1e;
}

section .column {
  background-color: #121212;
  border: 2px solid var(--col-border-color);
  border-radius: var(--border-radius-sm);
  padding: var(--padding-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  outline: none;
  transition: all 0.7s cubic-bezier(0.215, 0.610, 0.355, 1);
}

.heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--gap-md);
}

.task {
  background-color: #1e1e1e;
  /* border: 1px solid var(--border-color); */
  border-radius: var(--border-radius-sm);
  padding: var(--padding-md);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  cursor: grab;
}


.task button {
  align-self: flex-end;
  background-color: var(--btn-bg-color);
  color: var(--font-color);
  border: none;
  padding: var(--padding-sm) var(--padding-md);
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease-in-out;
}

.task button:hover {
  background-color: var(--del-btn-hover-bg-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
}

.hover-on {
  border: 2px dashed var(--font-color) !important;
  scale: 1.025;
}

.del-modal{
  height: 100vh;
  width: 100vw;
  z-index: 1;
  position: absolute;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  background-color: #00000059;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-container h2 {
  margin-bottom: var(--margin-md);
  margin-left: var(--margin-lg);
}

.modal-container button {
  background-color: var(--btn-bg-color);
  color: var(--font-color);
  border: none;
  padding: var(--padding-md) var(--padding-lg);
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: all 0.3s ease-in-out;
}

.modal-container button:nth-child(3) {
  margin-left: var(--margin-xxl);
}

.modal-container button:hover {
  background-color: var(--btn-hover-bg-color);
  border-radius: var(--border-radius-md);
}

.modal-container button:nth-child(2):hover {
  background-color: var(--del-btn-hover-bg-color);
  border-radius: var(--border-radius-md);
}

.modal-container {
  background-color: var(--dlg-box-bg-color);
  padding: var(--padding-xl);
  border-radius: var(--border-radius-md);
}

.hidden {
  display: none !important;
}

.add-new-task{
  height: 100vh;
  width: 100vw;
  z-index: 1;
  position: absolute;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  background-color: #00000059;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

form {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
}

form input, form textarea {
  padding: var(--padding-md);
  border-radius: var(--border-radius-sm);
  border: none;
  outline: none;
  font-size: 1rem;
}

form textarea {
  resize: vertical;
  min-height: 120px;
  min-width: 300px;
}

.form-buttons button {
  font-size: 1rem;
}

.form-buttons {
  display: flex;
  justify-content: center;
  gap: var(--gap-xl);
}