/* ===== Responsive Styles - Block & Pixel Design ===== */

/* Tablet - 1024px */
@media (min-width: 769px) {
  .hide-sp { display: inline; }
}

@media (max-width: 1024px) {
  :root {
    --block-unit: 6px;
  }
  
  .about-intro__grid {
    gap: calc(var(--block-unit) * 6);
  }
  
  .instructor-preview {
    grid-template-columns: 280px 1fr;
    gap: calc(var(--block-unit) * 6);
  }
  
  .about-profile {
    grid-template-columns: 280px 1fr;
    gap: calc(var(--block-unit) * 6);
  }
  
  .method-section {
    gap: calc(var(--block-unit) * 4);
  }
  
  .pricing-card--popular {
    transform: translateY(-6px);
  }
  
  .pricing-card--popular:hover {
    transform: translate(-3px, -9px);
  }
  
  .course-detail {
    gap: calc(var(--block-unit) * 6);
  }
  
  .course-detail__icon-large {
    width: 160px;
    height: 160px;
  }
  
  .hero__block--1 { width: 60px; height: 60px; }
  .hero__block--2 { width: 50px; height: 50px; }
  .hero__block--3 { width: 35px; height: 35px; }
  .hero__block--4 { width: 45px; height: 45px; }
}

/* Tablet Portrait - 768px */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
    --block-unit: 6px;
    --border-width: 3px;
    --shadow-offset: 4px;
  }

  .header__menu-btn {
    display: block;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    background: var(--pixel-white);
    border-left: var(--border-width) solid var(--pixel-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px calc(var(--block-unit) * 5) calc(var(--block-unit) * 5);
    gap: calc(var(--block-unit));
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 40px rgba(0,0,0,0.2);
    z-index: 1000;
  }

  .header__nav--open {
    transform: translateX(0);
  }

  .header__nav-link {
    width: 100%;
    padding: calc(var(--block-unit) * 2) calc(var(--block-unit) * 3);
    font-size: 1rem;
    border: 2px solid transparent;
  }

  .header__nav-link--active::after {
    display: none;
  }

  .header__nav-link--active {
    background: rgba(108, 92, 231, 0.1);
    border-color: var(--pixel-primary);
  }

  .header__nav-cta {
    margin-left: 0;
    margin-top: calc(var(--block-unit) * 3);
    width: 100%;
    justify-content: center;
  }

  .header__overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 1;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + 60px) 0 80px;
  }
  
  .hero__title {
    font-size: 1.8rem;
  }
  
  .hero__title-accent {
    padding: 0 calc(var(--block-unit) * 2);
    box-shadow: 4px 4px 0 var(--pixel-dark);
  }
  
  .hero__subtitle {
    font-size: 0.95rem;
  }
  
  .hero__stats {
    flex-direction: row;
    flex-wrap: wrap;
    gap: calc(var(--block-unit) * 2);
    padding: calc(var(--block-unit) * 2) calc(var(--block-unit) * 4);
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
  
  .hero__stat-divider {
    display: none;
  }
  
  .hero__scroll-hint {
    display: none;
  }
  
  .hero__block--1,
  .hero__block--3,
  .hero__block--4 {
    display: none;
  }
  
  .hero__block--2 {
    width: 40px;
    height: 40px;
    top: 70%;
    left: 8%;
  }

  /* Section */
  .section {
    padding: 80px 0;
  }
  
  .section-title {
    margin-bottom: calc(var(--block-unit) * 5);
  }

  /* About Intro */
  .about-intro__grid {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .about-intro__visual {
    height: 320px;
  }
  
  .about-intro__float-card {
    padding: calc(var(--block-unit) * 2);
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* Courses */
  .courses-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 3);
  }
  
  .course-card {
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
  
  .course-card:hover {
    box-shadow: 8px 8px 0 var(--pixel-border);
  }

  /* Course Method */
  .course-method__features {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 2);
  }
  
  .course-method__feature {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* Course Detail */
  .course-detail {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .course-detail--reverse {
    direction: ltr;
  }
  
  .course-detail__icon-large {
    width: 140px;
    height: 140px;
    box-shadow: 6px 6px 0 var(--pixel-border);
  }

  /* Instructor */
  .instructor-preview {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .instructor-preview__image {
    max-width: 280px;
    margin: 0 auto;
    box-shadow: 6px 6px 0 var(--pixel-border);
  }

  /* Pricing */
  .pricing-cards {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 3);
    max-width: 400px;
    margin: 0 auto;
  }
  
  .pricing-card {
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
  
  .pricing-card:hover {
    box-shadow: 8px 8px 0 var(--pixel-border);
  }
  
  .pricing-card--popular {
    transform: translateY(-6px);
  }
  
  .pricing-card--popular:hover {
    transform: translate(-3px, -9px);
    box-shadow: 9px 9px 0 var(--pixel-primary);
  }

  /* Discounts */
  .discounts-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 2);
  }
  
  .discount-card {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* About */
  .about-profile {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .about-profile__image-wrap {
    max-width: 280px;
    margin: 0 auto;
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
  
  .achievements-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 2);
  }
  
  .achievement-card {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* Method */
  .method-section {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 4);
  }
  
  .method-step {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .contact-card {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }
  
  .contact-info-box {
    box-shadow: 6px 6px 0 var(--pixel-border);
  }

  /* Supported by */
  .supported-by {
    padding: 80px 0;
  }

  .supported-by__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: calc(var(--block-unit) * 2);
  }

  .supported-by__item {
    min-height: 130px;
    box-shadow: 4px 4px 0 var(--pixel-border);
  }

  /* Footer */
  .footer__top {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 5);
  }
  
  .footer__links {
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--block-unit) * 4);
  }

  /* CTA */
  .cta-section {
    padding: 80px 0;
  }
  
  .cta-section__buttons {
    flex-direction: column;
    align-items: center;
  }

  /* Page Hero */
  .page-hero {
    padding: 80px 0 60px;
  }

  /* Other pricing table */
  .other-pricing {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }
  
  .other-pricing__table th,
  .other-pricing__table td {
    padding: calc(var(--block-unit) * 2);
    font-size: 0.9rem;
  }
  
  /* Message Section */
  .message-section {
    padding: calc(var(--block-unit) * 4);
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
}

/* Mobile - 480px */
@media (max-width: 480px) {
  :root {
    --block-unit: 4px;
    --border-width: 3px;
    --shadow-offset: 4px;
  }
  
  .container {
    padding: 0 calc(var(--block-unit) * 4);
  }

  .hero {
    padding: calc(var(--header-height) + 40px) 0 60px;
  }
  
  .hero__title {
    font-size: 1.5rem;
  }
  
  .hero__title-accent {
    box-shadow: 3px 3px 0 var(--pixel-dark);
    padding: 0 var(--block-unit);
  }
  
  .hero__actions {
    flex-direction: column;
    align-items: center;
    margin-bottom: calc(var(--block-unit) * 6);
  }
  
  .hero__actions .btn {
    width: 100%;
    justify-content: center;
    box-shadow: 4px 4px 0 var(--pixel-border);
  }
  
  .hero__stats {
    padding: calc(var(--block-unit) * 2) calc(var(--block-unit) * 3);
    gap: calc(var(--block-unit) * 2);
    box-shadow: 4px 4px 0 var(--pixel-border);
  }
  
  .hero__stat-num {
    font-size: 1.1rem;
  }

  .about-intro__visual {
    height: 280px;
  }
  
  .about-intro__float-card {
    padding: calc(var(--block-unit) * 2) calc(var(--block-unit) * 3);
    font-size: 0.85rem;
    box-shadow: 3px 3px 0 var(--pixel-border);
  }

  .course-card {
    padding: calc(var(--block-unit) * 4);
  }

  .section {
    padding: 60px 0;
  }
  
  .section-title__heading {
    font-size: 1.5rem;
  }

  .pricing-card {
    padding: calc(var(--block-unit) * 4);
  }
  
  .pricing-card__amount {
    font-size: 2rem;
  }

  .other-pricing {
    border-radius: 0;
    overflow-x: auto;
  }
  
  .other-pricing__table {
    min-width: 480px;
  }

  .contact-info-box {
    padding: calc(var(--block-unit) * 4);
  }
  
  .contact-info-item {
    flex-direction: column;
    gap: var(--block-unit);
  }
  
  .contact-info-item__label {
    width: auto;
  }

  .supported-by {
    padding: 60px 0;
  }

  .supported-by__grid {
    grid-template-columns: 1fr;
  }

  .supported-by__item {
    min-height: 120px;
  }

  .supported-by__logo {
    max-width: 200px;
    max-height: 72px;
  }

  .footer__links {
    grid-template-columns: 1fr;
    gap: calc(var(--block-unit) * 4);
  }

  .page-hero {
    padding: 60px 0 40px;
  }
  
  .page-hero__title {
    font-size: 1.5rem;
  }

  .about-profile__name {
    font-size: 1.5rem;
  }

  .course-detail__icon-large {
    width: 120px;
    height: 120px;
  }
  
  .course-detail__price-amount {
    font-size: 1.8rem;
  }
  
  .course-detail__title {
    font-size: 1.6rem;
  }

  .cta-section__title {
    font-size: 1.3rem;
  }

  .btn--lg {
    padding: calc(var(--block-unit) * 3) calc(var(--block-unit) * 4);
    font-size: 0.95rem;
  }
  
  .btn {
    box-shadow: 4px 4px 0 var(--pixel-border);
  }
  
  .btn:hover {
    box-shadow: 6px 6px 0 var(--pixel-border);
  }
  
  /* FAQ */
  .faq-item {
    box-shadow: 3px 3px 0 var(--pixel-border);
  }
  
  .faq-item__question {
    padding: calc(var(--block-unit) * 2);
  }
  
  .faq-item__q-mark,
  .faq-item__a-mark {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
    box-shadow: 2px 2px 0 var(--pixel-dark);
  }
}