/* =========================
   Debloat Landing – landing.css
   BEM + logical properties
   Mobile-first responsive
   ========================= */

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

a { color: inherit; }

img, svg { display: block; }

/* =========================
   Utility
   ========================= */

.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;
}

/* =========================
   Icon (inline SVG <use>)
   ========================= */

.icon {
  width: 1em; height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  fill: currentColor;
  flex-shrink: 0;
}

.icon--sm  { width: 0.875em; height: 0.875em; }
.icon--lg  { width: 1.25em; height: 1.25em; }
.icon--xl  { width: 1.5em; height: 1.5em; }
.icon--2xl { width: 2em; height: 2em; }
.icon--brand { fill: none; }

/* =========================
   Container
   ========================= */

.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-5); }
}

/* =========================
   Typography
   ========================= */

.text-display {
  font-size: clamp(2rem, 3.2vw, 3rem);
  line-height: 1.1;
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  margin: 0;
}

.text-title {
  font-size: var(--fs-xl);
  line-height: 1.25;
  font-weight: var(--fw-semibold);
  margin: 0;
}

.text-lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
}

.text-body {
  font-size: var(--fs-md);
  line-height: 1.6;
  margin: 0;
}

.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }

/* =========================
   Button
   ========================= */

.btn {
  font-size: var(--fs-control);
  line-height: var(--lh-control);
  padding-block: var(--control-pad-y);
  padding-inline: var(--control-pad-x);
  min-height: var(--control-min-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  white-space: nowrap;
  border: var(--border-1) solid transparent;
  border-radius: var(--r-pill);
  font-weight: var(--fw-medium);
  font-family: inherit;
  text-decoration: none;
  color: inherit;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-md);
}

.btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--primary);
  color: var(--btn-text-on-dark);
}
.btn--primary:hover {
  background: var(--primary-hover);
  border-color: color-mix(in srgb, var(--primary) 35%, transparent);
}

.btn--ghost {
  background: transparent;
  color: var(--text-main);
  border-color: var(--border-subtle);
}
.btn--ghost:hover {
  background: var(--panel);
  border-color: var(--border-strong);
}

.btn--disabled {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

.btn--lg {
  font-size: calc(var(--fs-control) * 1.05);
  padding-block: calc(var(--control-pad-y) * var(--control-scale-lg));
  padding-inline: calc(var(--control-pad-x) * var(--control-scale-lg));
}

.btn .icon {
  width: 1.1em; height: 1.1em;
}

/* =========================
   Badge
   ========================= */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  padding: 0.2em 0.6em;
  border-radius: var(--r-pill);
  background: var(--primary-soft);
  color: var(--primary);
}

/* =========================
   Card
   ========================= */

.card {
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.card__icon {
  width: 2.5rem; height: 2.5rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.card__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin: 0;
}

.card__text {
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
}

/* Card icon color variants */
.card__icon--emerald {
  background: color-mix(in srgb, var(--emerald-500) 12%, transparent);
  color: var(--emerald-500);
}

.card__icon--amber {
  background: color-mix(in srgb, var(--warning) 12%, transparent);
  color: var(--warning);
}

.card__icon--rose {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
}

.card__icon--blue {
  background: color-mix(in srgb, var(--info) 12%, transparent);
  color: var(--info);
}

.card__icon--purple {
  background: color-mix(in srgb, #818CF8 12%, transparent);
  color: #818CF8;
}

.card__icon--teal {
  background: color-mix(in srgb, #2DD4BF 12%, transparent);
  color: #2DD4BF;
}

/* =========================
   Section common
   ========================= */

.section {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.section__header {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-block-end: clamp(2rem, 4vw, 3rem);
}

.section__header .text-title {
  margin-block-end: var(--space-2);
}

.section--alt {
  background: var(--bg-elevated);
}

/* =========================
   NAV
   ========================= */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-block-end: 1px solid var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-2);
  min-height: 3.25rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-weight: var(--fw-bold);
  font-size: var(--fs-lg);
  color: var(--text-main);
  flex-shrink: 0;
}

.nav__logo .icon {
  width: 1.75em; height: 1.75em;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0; padding: 0;
}

@media (min-width: 768px) {
  .nav__links { display: flex; }
}

.nav__links a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__links a:hover {
  color: var(--text-main);
  background: var(--bg-soft);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-inline-start: auto;
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem; height: 2rem;
  background: transparent;
  border: var(--border-1) solid var(--border-subtle);
  border-radius: var(--r-pill);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--text-main);
  border-color: var(--border-strong);
}

/* Mobile menu toggle */
.nav__mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem; height: 2rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
}

@media (min-width: 768px) {
  .nav__mobile-toggle { display: none; }
}

/* Mobile nav panel */
.nav__mobile-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding-block: var(--space-2);
  border-block-start: 1px solid var(--border-subtle);
}

.nav__mobile-menu.is-open {
  display: flex;
}

@media (min-width: 768px) {
  .nav__mobile-menu { display: none !important; }
}

.nav__mobile-menu a {
  display: block;
  padding: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius);
}

.nav__mobile-menu a:hover {
  color: var(--text-main);
  background: var(--bg-soft);
}

/* =========================
   HERO
   ========================= */

.hero {
  padding-block: clamp(4rem, 10vw, 7rem) clamp(3rem, 6vw, 5rem);
  text-align: center;
}

.hero__badge {
  margin-block-end: var(--space-3);
}

.hero__title {
  max-width: 720px;
  margin-inline: auto;
  margin-block-end: var(--space-3);
}

.hero__subtitle {
  max-width: 560px;
  margin-inline: auto;
  margin-block-end: var(--space-2);
  font-size: clamp(1.15rem, 1rem + 0.75vw, 1.35rem);
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.hero__tagline {
  max-width: 560px;
  margin-inline: auto;
  margin-block-end: var(--space-5);
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-style: italic;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

/* =========================
   WHAT IT BLOCKS (categories)
   ========================= */

.blocks__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 480px) {
  .blocks__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .blocks__grid { grid-template-columns: repeat(3, 1fr); }
}

/* =========================
   HOW IT WORKS
   ========================= */

.how__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: 960px;
  margin-inline: auto;
}

@media (min-width: 768px) {
  .how__grid { grid-template-columns: repeat(3, 1fr); }
}

.how__step {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.how__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--primary);
  color: var(--btn-text-on-dark);
  border-radius: 50%;
  font-weight: var(--fw-bold);
  font-size: var(--fs-lg);
  flex-shrink: 0;
}

.how__title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin: 0;
}

.how__text {
  font-size: var(--fs-sm);
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
}

/* =========================
   FEATURES (presets, activity, etc.)
   ========================= */

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 480px) {
  .features__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .features__grid { grid-template-columns: repeat(3, 1fr); }
}

/* =========================
   BROWSERS
   ========================= */

.browsers__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(2rem, 4vw, 4rem);
}

.browsers__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
}

.browsers__item .icon {
  width: 2.5rem; height: 2.5rem;
}

/* =========================
   PRIVACY
   ========================= */

.privacy__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  max-width: 960px;
  margin-inline: auto;
}

@media (min-width: 480px) {
  .privacy__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .privacy__grid { grid-template-columns: repeat(3, 1fr); }
}

.privacy__card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  line-height: 1.4;
  transition: border-color 0.15s ease;
}

.privacy__card:hover {
  border-color: var(--success);
}

.privacy__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: color-mix(in srgb, var(--success) 12%, transparent);
  color: var(--success);
}

/* =========================
   OPEN SOURCE
   ========================= */

.opensource__content {
  text-align: center;
  max-width: 540px;
  margin-inline: auto;
}

.opensource__content .text-lead {
  margin-block-end: var(--space-4);
}

/* =========================
   ABOUT
   ========================= */

.about {
  max-width: 720px;
  margin-inline: auto;
}

.about__title {
  margin-block-end: var(--space-3);
}

.about__lead {
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--text-muted);
  margin: 0 0 var(--space-3);
}

.about__more {
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--text-muted);
}

.about__more summary {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--primary);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}

.about__more summary::-webkit-details-marker { display: none; }

.about__more summary::before {
  content: '\25B8';
  transition: transform var(--transition-fast);
}

.about__more[open] summary::before {
  transform: rotate(90deg);
}

.about__more p {
  margin: var(--space-3) 0 0;
}

/* =========================
   FOOTER
   ========================= */

.footer {
  border-block-start: 1px solid var(--border-subtle);
  padding-block: var(--space-5);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.footer__copy {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin: 0;
}

.footer__links {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  margin: 0; padding: 0;
}

.footer__links a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover { color: var(--text-main); }

.footer__icon-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
}

.footer__icon-link .icon {
  width: 0.9em; height: 0.9em;
}

/* =========================
   Smooth scroll & reduced motion
   ========================= */

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}