/* ===== KANA - CSS STYLES ===== */

/* --- CSS Custom Properties (Design System) --- */
:root {
  /* Colors */
  --color-bg: #101011;
  --color-bg-card: #151515;
  --color-bg-card-alt: #1f1f1f;
  --color-accent: #ed5145;
  --color-accent-border: rgba(237, 81, 69, 0.55);
  --color-text: #fbfbfb;
  --color-text-70: rgba(251, 251, 251, 0.7);
  --color-text-60: rgba(251, 251, 251, 0.6);
  --color-text-50: rgba(251, 251, 251, 0.5);
  --color-border: #393939;
  --color-border-light: #353535;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-pill: 50rem;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 2rem;
}

/* --- Reset & Base Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

/* --- Utility Classes --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.container--sm {
  max-width: 800px;
}

.text-center {
  text-align: center;
}

.text-bold {
  font-weight: 700;
}

.text-medium {
  font-weight: 500;
}

.opacity-50 { opacity: 0.5; }
.opacity-60 { opacity: 0.6; }
.opacity-70 { opacity: 0.7; }
.opacity-80 { opacity: 0.8; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.15;
  font-weight: 700;
}

.heading-2 {
  font-size: clamp(1.75rem, 4vw, var(--text-4xl));
  line-height: 1.2;
}

.heading-3 {
  font-size: var(--text-3xl);
}

.heading-4 {
  font-size: clamp(1.25rem, 3vw, var(--text-2xl));
  line-height: 1.15;
}

.heading-6 {
  font-size: var(--text-lg);
}

.text-lg {
  font-size: var(--text-lg);
}

.text-sm {
  font-size: var(--text-sm);
}

/* --- Components --- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text);
}

.btn--primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn--secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-4);
  gap: var(--space-4);
}

.btn--secondary:hover {
  border-color: var(--color-text-50);
}

.btn__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--color-bg);
  border-radius: 50%;
}

.btn__icon svg {
  width: 14px;
  height: 14px;
}

/* Tag / Pill */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-pill);
  font-size: var(--text-sm);
  font-weight: 700;
  transition: all var(--transition-base);
}

.tag:hover {
  background: rgba(237, 81, 69, 0.1);
}

.tag__divider {
  width: 1px;
  height: 1rem;
  background: var(--color-text-50);
}

.tag__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-50);
}

.tag__link svg {
  width: 11px;
  height: 9px;
}

/* Cards */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-16) var(--space-20);
}

.card--alt {
  background: var(--color-bg-card-alt);
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-5) 0;
  background: rgba(16, 16, 17, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.navbar__logo {
  display: flex;
  align-items: center;
  height: 2.5rem;
}

.navbar__logo img {
  height: 100%;
  width: auto;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-10);
}

.navbar__link {
  font-size: var(--text-base);
  color: var(--color-text);
  transition: opacity var(--transition-base);
}

.navbar__link:hover {
  opacity: 0.8;
}

.navbar__cta {
  display: flex;
  align-items: center;
}

/* Mobile Menu Toggle */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.navbar__toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition-base);
}

.navbar__toggle.is-active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.navbar__toggle.is-active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  padding-top: calc(80px + var(--space-16));
  padding-bottom: var(--space-8);
  text-align: center;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.hero__headline {
  max-width: 120ch;
}

.hero__headline h1 {
  font-size: clamp(2rem, 7vw, 4.5rem);
  line-height: 1.1;
}

.hero__subheadline {
  max-width: 70ch;
  margin-top: var(--space-6);
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text-60);
  font-size: var(--text-lg);
  line-height: 1.5;
}

.hero__buttons {
  display: flex;
  align-items: stretch;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.hero__help {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.hero__help-label {
  font-size: var(--text-sm);
  color: var(--color-text-60);
}

.hero__help-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-16);
}

.hero__help-item {
  height: 2rem;
  display: flex;
  align-items: center;
}

.hero__help-item img {
  height: 100%;
  width: auto;
}

/* --- Hero Images Section --- */
.hero-images {
  padding: var(--space-8) var(--container-padding);
  overflow: hidden;
}

.hero-images img {
  width: 100%;
  max-width: 1200px;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

/* --- Features Section --- */
.features {
  padding: var(--space-24) 0;
}

.features__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.features__header-text {
  max-width: 46ch;
  margin: 0 auto;
  margin-top: var(--space-6);
  color: var(--color-text-60);
}

.features__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.features__row {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-6);
}

.features__row:nth-child(2) {
  grid-template-columns: 1fr 1.5fr;
}

.feature-card {
  background: var(--color-bg-card-alt);
  border-radius: var(--radius-md);
  padding: var(--space-16) var(--space-20) var(--space-10);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-12);
  text-align: center;
}

.feature-card__image {
  height: 10rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.feature-card__image img {
  max-height: 100%;
  width: auto;
}

.feature-card__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.feature-card__title {
  font-size: var(--text-lg);
}

.feature-card__desc {
  color: var(--color-text-70);
  max-width: 50ch;
}

/* --- How It Works Section --- */
.how-it-works {
  padding: var(--space-24) 0;
  scroll-margin-top: 100px;
}

.how-it-works__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.how-it-works__header-text {
  max-width: 48ch;
  margin: 0 auto;
  margin-top: var(--space-6);
  color: var(--color-text-60);
}

.how-it-works__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-6);
  background: var(--color-bg-card-alt);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  border: 1px solid var(--color-border-light);
}

.step__number {
  font-size: var(--text-lg);
  color: var(--color-text);
}

.step__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 20ch;
}

.step__title {
  font-weight: 500;
}

.step__desc {
  color: var(--color-text-70);
  font-size: var(--text-sm);
}

/* --- Pricing Section --- */
.pricing {
  padding: var(--space-24) 0;
  scroll-margin-top: 100px;
}

.pricing__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.price-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  padding: var(--space-10) var(--space-8) var(--space-16);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 55vh;
  gap: var(--space-16);
}

.price-card:nth-child(2) {
  background: var(--color-bg-card-alt);
}

.price-card__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.price-card__icon {
  width: 3.5rem;
  height: 3.5rem;
  background: var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
}

.price-card__icon svg {
  width: 100%;
  height: 100%;
}

.price-card__price {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
}

.price-card__amount {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1;
}

.price-card__period {
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: 0.2rem;
}

.price-card__name {
  font-size: var(--text-lg);
  font-weight: 500;
}

.price-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.price-card__features-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-80);
}

.price-card__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.price-card__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.price-card__check {
  width: 1.75rem;
  min-width: 1.75rem;
  height: 1.75rem;
  background: var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.price-card__check svg {
  width: 0.875rem;
  height: auto;
}

.price-card__item-text {
  font-size: var(--text-base);
  line-height: 1.75rem;
}

.pricing__buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}

/* --- FAQ Section --- */
.faq {
  padding: var(--space-24) 0;
  scroll-margin-top: 100px;
}

.faq__header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: rgba(223, 223, 223, 0.06);
  border-radius: var(--radius-sm);
  padding: var(--space-6);
  cursor: pointer;
  transition: background var(--transition-base);
}

.faq-item:hover {
  background: rgba(223, 223, 223, 0.1);
}

.faq-item__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.faq-item__question {
  font-size: var(--text-base);
  font-weight: 500;
  flex: 1;
  padding-right: var(--space-4);
}

.faq-item__icon {
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
}

.faq-item__icon svg {
  width: 14px;
  height: 10px;
}

.faq-item.is-open .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), margin var(--transition-slow);
}

.faq-item.is-open .faq-item__answer {
  max-height: 500px;
  margin-top: var(--space-6);
}

.faq-item__answer-text {
  color: var(--color-text-70);
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  padding: var(--space-24) 0 var(--space-12);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-20);
}

.footer__logo {
  max-height: 4rem;
}

.footer__logo img {
  height: 100%;
  width: auto;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.footer__link {
  color: var(--color-text-70);
  font-size: var(--text-base);
  transition: color var(--transition-base), transform var(--transition-base);
}

.footer__link:hover {
  color: var(--color-text);
  transform: translateY(-2px);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-16);
}

.footer__copyright,
.footer__credit {
  color: var(--color-text-50);
  font-size: var(--text-sm);
}

.footer__credit a {
  transition: opacity var(--transition-base);
}

.footer__credit a:hover {
  opacity: 0.8;
}

/* --- Responsive Styles --- */
@media (max-width: 991px) {
  :root {
    --container-padding: 1.5rem;
  }

  .navbar__menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-8);
    background: rgba(16, 16, 17, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid var(--color-border);
  }

  .navbar__menu.is-open {
    display: flex;
  }

  .navbar__toggle {
    display: flex;
  }

  .navbar__cta {
    display: none;
  }

  body.menu-open {
    overflow: hidden;
  }

  .hero__help-items {
    gap: var(--space-8);
  }


  .features__row,
  .features__row:nth-child(2) {
    grid-template-columns: 1fr;
  }

  .how-it-works__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing__grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .price-card {
    min-height: auto;
  }
}

@media (max-width: 767px) {
  .heading-2 {
    font-size: 1.75rem;
  }

  .hero__buttons {
    flex-direction: column;
    width: 100%;
    max-width: 280px;
  }

  .hero__help-items {
    gap: var(--space-6);
  }

  .hero__help-item {
    height: 1.5rem;
  }

  .how-it-works__grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .step {
    gap: var(--space-4);
  }

  .step__content {
    max-width: none;
  }

  .feature-card {
    padding: var(--space-8) var(--space-6);
  }

  .pricing__buttons {
    flex-direction: column;
    align-items: center;
  }

  .faq-item__top {
    gap: var(--space-4);
  }
}

@media (max-width: 479px) {
  :root {
    --container-padding: 1rem;
  }

  .navbar__logo {
    height: 2rem;
  }

  .hero {
    padding-top: calc(70px + var(--space-8));
  }

  .footer__links {
    flex-direction: column;
    align-items: center;
  }
}