*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-primary: #635fc7;
  --color-primary-hover: #a8a4ff;
  --color-danger: #ea5555;
  --color-danger-hover: #ff9898;

  --color-bg: #f4f7fd;
  --color-surface: #ffffff;
  --color-surface-soft: #f4f7fd;
  --color-border: #e4ebfa;
  --color-text: #01020e;
  --color-text-soft: #828fa3;
  --color-shadow: 0 4px 6px rgba(54, 78, 126, 0.1015);

  --todo: #49c4e5;
  --doing: #8471f2;
  --done: #67e2ae;

  --priority-low: #08e65a;
  --priority-medium: #fea101;
  --priority-high: #fc0505;

  --sidebar-width: 300px;
  --header-height: 96px;
  --radius-md: 12px;
  --radius-pill: 999px;
}

body.dark-theme {
  --color-bg: #20212c;
  --color-surface: #2b2c37;
  --color-surface-soft: #20212c;
  --color-border: #3e3f4e;
  --color-text: #ffffff;
  --color-text-soft: #828fa3;
  --color-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

html,
body {
  min-height: 100%;
  margin: 0;
  font-family: "Plus Jakarta Sans", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

body {
  min-height: 100vh;
}

img {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app-shell {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.side-bar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 20;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.side-bar.hidden {
  transform: translateX(-100%);
  opacity: 0;
  pointer-events: none;
  position: absolute;
}

.sidebar-top {
  padding-top: 32px;
}

#side-logo-div {
  padding: 0 34px 54px;
}

#logo {
  width: 152px;
}

.boards-nav-links-div {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

#headline-sidepanel {
  margin: 0;
  padding-left: 32px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.4px;
  color: var(--color-text-soft);
}

.board-btn {
  width: calc(100% - 24px);
  height: 48px;
  border: none;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: transparent;
  color: var(--color-text-soft);
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  padding: 0 24px 0 32px;
  transition: 0.2s ease;
}

.board-btn:hover,
.board-btn.active-board {
  background: var(--color-primary);
  color: #ffffff;
}

.sidebar-bottom {
  padding: 0 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.theme-toggle-box {
  min-height: 48px;
  border-radius: 8px;
  background: var(--color-surface-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.theme-icon {
  font-size: 16px;
  line-height: 1;
}

.theme-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 20px;
}

.theme-switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.theme-slider {
  position: absolute;
  inset: 0;
  background: var(--color-primary);
  border-radius: 999px;
  cursor: pointer;
}

.theme-slider::before {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  left: 3px;
  top: 3px;
  border-radius: 50%;
  background: #ffffff;
  transition: transform 0.2s ease;
}

.theme-switch input:checked + .theme-slider::before {
  transform: translateX(20px);
}

.hide-sidebar-btn {
  height: 48px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-soft);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 700;
}

.hide-sidebar-btn:hover {
  background: rgba(99, 95, 199, 0.1);
  color: var(--color-primary);
}

.show-sidebar-btn {
  position: fixed;
  left: 0;
  bottom: 32px;
  width: 56px;
  height: 48px;
  border: none;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--color-shadow);
  display: none;
  z-index: 40;
}

.show-sidebar-btn.visible {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

#layout {
  flex: 1;
  min-width: 0;
}

header {
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px 0 24px;
}

.header-name-div {
  display: flex;
  align-items: center;
  gap: 16px;
}

.mobile-menu-trigger {
  display: none;
  padding: 0;
  border: none;
  background: transparent;
}

.logo-mobile {
  width: 24px;
  height: 25px;
}

h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
}

.primary-btn,
.submit-btn,
.delete-btn {
  border: none;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  transition: 0.2s ease;
}

.primary-btn {
  min-width: 164px;
  height: 48px;
  padding: 0 24px;
  background: var(--color-primary);
  color: #ffffff;
}

.primary-btn:hover,
.submit-btn:hover {
  background: var(--color-primary-hover);
}

.delete-btn {
  height: 48px;
  padding: 0 24px;
  background: var(--color-danger);
  color: #ffffff;
}

.delete-btn:hover {
  background: var(--color-danger-hover);
}

.container {
  padding: 24px 24px 32px;
}

.card-column-main {
  display: grid;
  grid-template-columns: repeat(3, minmax(280px, 1fr));
  gap: 24px;
  align-items: start;
}

.column-div {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.column-head-div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.columnHeader {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2.4px;
  color: var(--color-text-soft);
}

.dot {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  flex-shrink: 0;
}

.todo-dot {
  background: var(--todo);
}

.doing-dot {
  background: var(--doing);
}

.done-dot {
  background: var(--done);
}

.tasks-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.task-div {
  min-height: 88px;
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius-md);
  box-shadow: var(--color-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.task-div:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(54, 78, 126, 0.15);
}

.task-title {
  line-height: 1.3;
}

.priority-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.priority-dot.low {
  background: var(--priority-low);
}

.priority-dot.medium {
  background: var(--priority-medium);
}

.priority-dot.high {
  background: var(--priority-high);
}

dialog {
  border: none;
  padding: 0;
  background: transparent;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

#task-modal,
.modal-overlay,
.mobile-menu {
  width: 100%;
  max-width: none;
}

#task-modal[open],
.modal-overlay[open] {
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.mobile-menu[open] {
  display: grid;
  place-items: start center;
  min-height: 100vh;
  padding-top: 80px;
}

.modal-window,
.edit-task-form,
.mobile-menu-card {
  width: min(480px, calc(100vw - 32px));
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(54, 78, 126, 0.25);
  padding: 24px;
}

.mobile-menu-card {
  width: min(264px, calc(100vw - 32px));
  padding: 16px;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.mobile-menu-header h4 {
  margin: 0;
  font-size: 12px;
  letter-spacing: 2.4px;
  color: var(--color-text-soft);
}

.mobile-theme-box {
  margin-top: 16px;
}

.mobile-board-btn {
  width: 100%;
  border-radius: var(--radius-pill);
  padding-left: 24px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title,
.modal-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--color-danger);
  font-size: 32px;
  line-height: 1;
  padding: 0;
}

.small-close-btn {
  font-size: 28px;
}

.input-div {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

form label {
  color: var(--color-text-soft);
  font-size: 12px;
  font-weight: 700;
}

form input,
form textarea,
form select {
  width: 100%;
  border: 1px solid rgba(130, 143, 163, 0.25);
  border-radius: 4px;
  background: var(--color-surface);
  color: var(--color-text);
  padding: 12px 16px;
  outline: none;
}

form input::placeholder,
form textarea::placeholder {
  color: rgba(130, 143, 163, 0.5);
}

form input:focus,
form textarea:focus,
form select:focus {
  border-color: var(--color-primary);
}

form textarea {
  min-height: 112px;
  resize: none;
}

form select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 7' fill='none'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23635FC7' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.button-group,
.modal-actions {
  display: flex;
  gap: 16px;
}

.submit-btn {
  flex: 1;
  height: 48px;
  background: var(--color-primary);
  color: #ffffff;
}

.two-buttons > * {
  flex: 1;
}

@media (max-width: 1024px) {
  .side-bar {
    display: none;
  }

  .mobile-menu-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  header {
    height: 72px;
    padding: 0 16px;
  }

  h2 {
    font-size: 20px;
  }

  .primary-btn {
    min-width: 140px;
    height: 40px;
    font-size: 13px;
    padding: 0 18px;
  }

  .card-column-main {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }
}

@media (max-width: 640px) {
  .container {
    padding: 16px;
  }

  .card-column-main {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .task-div {
    min-height: 72px;
    padding: 14px;
    font-size: 14px;
  }

  h2 {
    font-size: 18px;
  }

  .primary-btn {
    min-width: 48px;
    width: 48px;
    padding: 0;
    font-size: 0;
    position: relative;
  }

  .primary-btn::before {
    content: "+";
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
  }

  .button-group,
  .modal-actions {
    flex-direction: column;
  }
}