@import url("https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wght@0,100..900;1,100..900&display=swap");

/* ======================================================
   RESET
====================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5% /* 1rem = 10px */;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f172a;
    --color-surface: #020617;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
  }
}

/* ======================================================
   1. PRIMITIVE / PALETTE TOKENS (NEVER CHANGE)
====================================================== */
:root {
  /* Neutral */
  --neutral-900: hsl(227, 75%, 14%);
  --neutral-800: hsl(226, 25%, 17%);
  --neutral-700: hsl(225, 23%, 24%);
  --neutral-600: hsl(226, 11%, 37%);
  --neutral-300: hsl(0, 0%, 78%);
  --neutral-200: hsl(217, 61%, 90%);
  --neutral-100: hsl(0, 0%, 93%);
  --neutral-50: hsl(200, 60%, 99%);

  /* Accent */
  --red-400: hsl(3, 86%, 64%);
  --red-500: hsl(3, 71%, 56%);
  --red-700: hsl(3, 77%, 44%);

  /* Gradient */
  --gradient-light: linear-gradient(180deg, #ebf2fc 0%, #eef8f9 100%);
  --gradient-dark: linear-gradient(180deg, #040918 0%, #091540 100%);

  /* Typography */
  --font-family-base: "Noto Sans", sans-serif;
  --font-size-base: 1rem;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  --line-height-base: 1.5;
}

/* ======================================================
   2. GRID TOKENS (USED BY LAYOUT)
====================================================== */
:root {
  /* 4px grid */
  /* Spacing */
  --space-grid: 0.4rem;
  --space-100: calc(var(--space-grid) * 1);
  --space-200: calc(var(--space-grid) * 2);
  --space-300: calc(var(--space-grid) * 3);
  --space-400: calc(var(--space-grid) * 4);
  --space-500: calc(var(--space-grid) * 5);
  --space-600: calc(var(--space-grid) * 6);
  --space-700: calc(var(--space-grid) * 7);
  --space-800: calc(var(--space-grid) * 8);
  --space-900: calc(var(--space-grid) * 9);
  --space-1000: calc(var(--space-grid) * 10);
  --space-1100: calc(var(--space-grid) * 11);
  --space-1200: calc(var(--space-grid) * 12);
  --space-1300: calc(var(--space-grid) * 13);
  --space-1400: calc(var(--space-grid) * 14);
  --space-1500: calc(var(--space-grid) * 15);

  --space-xs: var(--space-100);
  --space-sm: var(--space-200);
  --space-md: var(--space-300);
  --space-lg: var(--space-400);

  /* Radius */
  --radius-sm: var(--space-sm);
  --radius-md: var(--space-md);
  --radius-lg: var(--space-lg);
  --radius-pill: 100vmax;

  /* Transition */
  --transition-fast: 0.15s ease;
}

/* ======================================================
   2. SEMANTIC TOKENS (USED BY COMPONENTS)
====================================================== */
:root {
  /* Text */
  --color-text-primary: var(--neutral-900);
  --color-text-secondary: var(--neutral-600);
  --color-text-inverse: var(--neutral-100);

  /* Backgrounds */
  --color-bg-page: var(--gradient-light);
  --color-bg-surface-1: var(--neutral-50);
  --color-bg-surface-2: var(--neutral-100);

  /* Borders */
  --color-border-default: var(--neutral-200);

  /* Accent / Actions */
  --color-accent: var(--red-500);
  --color-accent-hover: var(--red-700);

  /* Toggles */
  --color-toggle-bg: var(--neutral-300);
  --color-toggle-thumb: #fff;

  /* Shadow */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07);
}

/* ======================================================
   3. THEMES (ONLY VARIABLE OVERRIDES)
====================================================== */
body[data-theme="dark"] {
  --color-text-primary: var(--neutral-100);
  --color-text-secondary: var(--neutral-300);
  --color-text-inverse: var(--neutral-900);

  --color-bg-page: var(--gradient-dark);
  --color-bg-surface-1: var(--neutral-800);
  --color-bg-surface-2: var(--neutral-700);

  --color-border-default: var(--neutral-700);

  --color-toggle-bg: var(--neutral-600);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
}

body[data-theme="dark"] .nav__theme-toggler:hover {
  background-color: var(--neutral-600);
}
body[data-theme="dark"] .nav__theme-icon--sun {
  display: block;
}
body[data-theme="dark"] .nav__theme-icon--moon {
  display: none;
}
.nav__theme-icon--sun {
  display: none;
}
/* ======================================================
   BASE
====================================================== */
body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  line-height: var(--line-height-base);
  padding: var(--space-lg) 0;
  min-height: 100vh;
}

/* ======================================================
   LAYOUT
====================================================== */
.container {
  max-width: 100rem;
  padding-inline: var(--space-md);
  margin-inline: auto;
}
.flow > * + * {
  margin-top: var(--space-lg);
}
.flow-sm > * + * {
  margin-top: var(--space-md);
}
.flow-xs > * + * {
  margin-top: var(--space-sm);
}

.text-muted {
  opacity: 0.6;
}

.header {
  margin-bottom: var(--space-500);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: var(--space-md);
  }
}
/* ======================================================
   UTILITIES
====================================================== */
.show {
  display: block !important;
}
.hide {
  display: none !important;
}

/* ======================================================
   NAVBAR
====================================================== */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-surface-1);
  border: 1px solid var(--color-border-default);
  margin-bottom: var(--space-1000);
  box-shadow: var(--shadow-sm);
}
.nav__logo {
  width: 100px;
  height: auto;
}

body[data-theme="dark"] .nav__logo path:nth-child(2) {
  fill: #fff;
}

.nav__title {
  font-weight: 600;
}

.nav__theme-toggler {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm);
  background-color: var(--color-bg-surface-2);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}
.nav__theme-toggler:hover {
  background-color: var(--neutral-200);
}
.nav__theme-icon {
  width: 14px;
  height: 14px;
}

/* ======================================================
   TABS
====================================================== */
.tabs {
  display: flex;
  gap: var(--space-200);
}
.tabs__button,
button {
  background: var(--color-bg-surface-1);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-pill);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  line-height: 1;
  font-size: 1.35rem;
}
.tabs__button {
  box-shadow: var(--shadow-sm);
}
.tabs__button--active {
  background-color: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: var(--color-text-inverse);
}

/* ======================================================
   EXTENSION GRID
====================================================== */
.extensions-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-md);
}
.extensions-list--empty {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  display: block;
  padding: var(--space-800) 0;
  background-color: var(--color-bg-surface-1);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* ======================================================
   EXTENSION CARD
====================================================== */
.extension-item {
  background-color: var(--color-bg-surface-1);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-900);
  box-shadow: var(--shadow-sm);
}
.extension-item__info {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  align-items: start;
}
.extension-item__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.extension-item__name {
  font-weight: 600;
}

.extension-item__description {
  color: var(--color-text-secondary);
  font-size: 1.2rem;
}

/* ======================================================
   CARD ACTIONS
====================================================== */
.extension-item__actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
}

/* ======================================================
   BUTTONS
====================================================== */
.button {
  cursor: pointer;
  background: none;
  color: var(--color-text-primary);
  transition: background-color var(--transition-fast);
}

.button:hover {
  background-color: var(--color-bg-surface-2);
}

.btn--danger {
  background-color: var(--red-500);
  color: #fff;
  border: 1px solid var(--red-500);
  transition: background-color var(--transition-fast);
}

/* ======================================================
   TOGGLE SWITCH
====================================================== */
.switch {
  /* === Single source of truth === */
  --size: 3.2rem;

  /* Derived values */
  --track-height: calc(var(--size) / 1.8);
  --padding: calc(var(--size) / 12);
  --thumb-size: calc(var(--track-height) - var(--padding) * 2);
  --translate-x: calc(var(--size) - var(--thumb-size) - var(--padding) * 2);

  position: relative;
  width: var(--size);
  height: var(--track-height);
  padding: var(--padding);

  display: flex;
  align-items: center;

  background-color: var(--color-toggle-bg);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.switch::after {
  content: "";
  width: var(--thumb-size);
  height: var(--thumb-size);

  background-color: var(--color-toggle-thumb);
  border-radius: 50%;

  transform: translateX(0);
  transition: transform var(--transition-fast);
}

/* Active state */
.switch[data-active="true"] {
  background-color: var(--color-accent);
}

.switch[data-active="true"]::after {
  transform: translateX(var(--translate-x));
}

/* ======================================================
   MODAL
====================================================== */
.modal {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal__content {
  background-color: var(--color-bg-surface-1);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-sm);
  position: relative;
}
.modal__close-btn {
  background: none;
  border: none;
  font-size: 2rem;
  position: absolute;
  top: var(--space-xs);
  right: var(--space-xs);
  cursor: pointer;
  color: var(--color-text-secondary);
}
.modal__title {
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-bold);
  font-size: 1.8rem;
  line-height: 1.2;
}
.modal__body {
  font-size: 1.3rem;
  color: var(--color-text-primary);
}

.modal__actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  margin-top: var(--space-800);
}

.modal--warning .modal__title {
  color: var(--red-500);
}

.modal__extension-details {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}
.modal__extension-name {
  font-size: 1.5rem;
  font-weight: var(--font-weight-regular);
}