/* =========================================================
   Siam2Dev Home - Mobile Optimization
   Applies only to tablet / phone breakpoints.
   Desktop layout remains unchanged.
   ========================================================= */

.mobile-home-jump{display:none;}

@media (max-width: 991.98px) {
  html { scroll-padding-top: 78px; }

  .navbar {
    padding-top: .35rem !important;
    padding-bottom: .35rem !important;
  }

  .navbar .container {
    padding-left: 14px;
    padding-right: 14px;
  }

  .navbar-brand img {
    width: 116px !important;
    height: auto;
  }

  .navbar-toggler {
    width: 46px;
    height: 42px;
    padding: .35rem .55rem;
    border-radius: 12px;
  }

  #topNavbar {
    max-height: calc(100vh - 74px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .navbar-collapse {
    margin-top: .45rem;
    padding: .65rem;
    border-radius: 16px;
    background: rgba(255,255,255,.98);
    box-shadow: 0 18px 46px rgba(15,23,42,.14);
  }

  .navbar .nav-link,
  .navbar .dropdown-item {
    min-height: 44px;
    display: flex;
    align-items: center;
    border-radius: 10px;
    padding: .62rem .78rem !important;
  }

  .navbar .dropdown-menu {
    border-radius: 14px;
    padding: .45rem;
    max-height: 48vh;
    overflow-y: auto;
  }

  .navbar .nav-cta {
    width: 100%;
    min-height: 44px;
    margin-top: .35rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .section {
    padding-top: 56px !important;
    padding-bottom: 56px !important;
  }

  .section-tight {
    padding-top: 44px !important;
    padding-bottom: 44px !important;
  }
}

@media (max-width: 767.98px) {
  html { scroll-padding-top: 68px; }

  body.site-home {
    overflow-x: hidden;
    padding-bottom: calc(72px + env(safe-area-inset-bottom));
  }

  .container {
    width: 100%;
    padding-left: 15px;
    padding-right: 15px;
  }

  /* ---------- Mobile navbar ---------- */
  .navbar {
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .navbar-brand {
    max-width: calc(100% - 58px);
  }

  .navbar-brand img {
    width: 106px !important;
  }

  .navbar-collapse {
    border: 1px solid rgba(148,163,184,.18);
  }

  .navbar-nav {
    align-items: stretch !important;
  }

  .navbar .nav-item {
    width: 100%;
  }

  .navbar .nav-link {
    font-size: .95rem;
  }

  /* ---------- Hero ---------- */
  .home-hero {
    min-height: auto !important;
    padding-top: 96px !important;
    padding-bottom: 38px !important;
    overflow: hidden;
  }

  .home-hero .container {
    position: relative;
    z-index: 3;
  }

  .home-hero .row {
    --bs-gutter-y: 1rem;
  }

  .home-hero .col-xl-8,
  .home-hero .col-lg-9 {
    width: 100%;
  }

  .home-hero .eyebrow {
    font-size: .78rem;
    line-height: 1.35;
    padding: .45rem .72rem;
    max-width: 100%;
  }

  .home-hero h1,
  .home-hero .display-4 {
    font-size: clamp(2rem, 9vw, 2.65rem) !important;
    line-height: 1.13 !important;
    letter-spacing: -.025em;
    margin-top: 14px;
  }

  .home-hero .hero-lead {
    font-size: .98rem !important;
    line-height: 1.7;
    margin-bottom: 20px !important;
  }

  .home-hero .hero-actions {
    display: grid !important;
    grid-template-columns: 1fr;
    gap: 9px !important;
  }

  .home-hero .hero-actions .btn {
    width: 100%;
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .94rem;
    padding: .72rem .9rem;
  }

  /* Reduce decorative AI scene on small screens */
  .home-hero .ai-visual {
    opacity: .18;
    transform: scale(.72);
    transform-origin: top right;
    right: -135px !important;
    top: 44px !important;
    pointer-events: none;
  }

  .home-hero .data-stream,
  .home-hero .ai-chip {
    display: none !important;
  }

  .home-hero .hero-mini-card {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 8px !important;
    margin-top: 18px !important;
  }

  .home-hero .hero-mini-card .metric {
    min-width: 0 !important;
    min-height: 78px;
    padding: 12px 10px !important;
    border-radius: 14px !important;
  }

  .home-hero .hero-mini-card .metric strong {
    display: block;
    font-size: .94rem;
    overflow-wrap: anywhere;
  }

  .home-hero .hero-mini-card .metric span {
    display: block;
    font-size: .72rem;
    line-height: 1.35;
  }

  /* ---------- Mobile quick jump ---------- */
  .mobile-home-jump {
    position: relative;
    z-index: 8;
    display: grid;
    grid-template-columns: repeat(4, minmax(0,1fr));
    gap: 5px;
    margin: -12px 10px 10px;
    padding: 7px;
    border-radius: 18px;
    background: rgba(255,255,255,.96);
    border: 1px solid rgba(148,163,184,.20);
    box-shadow: 0 14px 34px rgba(15,23,42,.12);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .mobile-home-jump a {
    min-width: 0;
    min-height: 54px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border-radius: 12px;
    color: #475569;
    font-size: .67rem;
    font-weight: 700;
    line-height: 1.15;
    text-align: center;
  }

  .mobile-home-jump a i {
    font-size: 1.12rem;
    color: #4f46e5;
  }

  .mobile-home-jump a:active {
    background: #eef2ff;
  }

  /* ---------- Quick panel ---------- */
  .quick-panel {
    padding-top: 16px !important;
    padding-bottom: 18px !important;
  }

  .quick-box {
    padding: 16px !important;
    border-radius: 18px !important;
  }

  .quick-tags {
    display: grid !important;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 8px !important;
  }

  .quick-tags .tag {
    width: 100%;
    min-height: 44px;
    margin: 0 !important;
    justify-content: flex-start;
    padding: 9px 10px !important;
    font-size: .8rem;
    line-height: 1.3;
  }

  /* ---------- Value strip ---------- */
  .value-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 10px !important;
  }

  .value-item {
    align-items: flex-start !important;
    padding: 14px !important;
    border-radius: 16px !important;
  }

  .value-item > i {
    flex: 0 0 auto;
  }

  .value-item b {
    font-size: .94rem;
  }

  .value-item span {
    font-size: .82rem;
    line-height: 1.55;
  }

  /* ---------- Section typography ---------- */
  .section {
    padding-top: 44px !important;
    padding-bottom: 44px !important;
  }

  .section-tight {
    padding-top: 38px !important;
    padding-bottom: 38px !important;
  }

  .section-header {
    margin-bottom: 22px !important;
  }

  .section-kicker {
    font-size: .76rem;
  }

  .section-title {
    font-size: clamp(1.55rem, 7vw, 2rem) !important;
    line-height: 1.28;
  }

  .section-desc {
    font-size: .9rem !important;
    line-height: 1.68;
  }

  /* ---------- Generic cards ---------- */
  .service-card,
  .course-card,
  .portfolio-card,
  .faq-card,
  .contact-card,
  .card-clean,
  .game-card {
    border-radius: 18px !important;
  }

  .service-card,
  .course-card,
  .portfolio-card,
  .faq-card,
  .contact-card {
    padding: 17px !important;
  }

  .service-card h3,
  .course-card h3,
  .portfolio-card h3 {
    font-size: 1rem !important;
    line-height: 1.45;
  }

  .service-card p,
  .course-card p,
  .portfolio-card p,
  .faq-card p {
    font-size: .86rem;
    line-height: 1.6;
  }

  .service-card .card-footer-clean {
    align-items: center;
    gap: 10px;
  }

  .service-card .card-footer-clean .btn {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
  }

  /* ---------- Courses ---------- */
  #eLearning .row {
    --bs-gutter-y: .8rem;
  }

  #eLearning .course-card {
    min-height: 0 !important;
  }

  #eLearning .course-card .btn {
    width: 100%;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* ---------- Pretest games ---------- */
  .game-summary {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 8px !important;
    margin-bottom: 16px !important;
  }

  .game-summary-item {
    justify-content: flex-start !important;
    min-height: 44px;
  }

  .game-card {
    overflow: hidden;
  }

  .game-scene {
    min-height: 145px !important;
    padding: 15px !important;
  }

  .game-scene-icon {
    transform: scale(.85);
  }

  .game-card-body {
    padding: 16px !important;
  }

  .game-card-body h3 {
    font-size: 1rem !important;
  }

  .game-card-body p {
    font-size: .84rem;
    line-height: 1.6;
  }

  .game-meta {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 6px !important;
  }

  .game-card .btn-game {
    width: 100%;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* ---------- IoT Community ---------- */
  #iot-community .row {
    --bs-gutter-y: 1.1rem;
  }

  #iot-community .d-flex.flex-wrap.gap-2 {
    display: grid !important;
    grid-template-columns: 1fr;
    gap: 8px !important;
  }

  #iot-community .d-flex.flex-wrap.gap-2 .btn {
    width: 100%;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  #iot-community .card-clean {
    padding: 16px !important;
  }

  #iot-community .card-clean .row {
    --bs-gutter-x: .6rem;
    --bs-gutter-y: .8rem;
  }

  #iot-community .card-clean strong {
    font-size: .84rem;
  }

  #iot-community .card-clean .small {
    font-size: .72rem;
  }

  /* ---------- Knowledge ---------- */
  .knowledge-link-card {
    min-height: 0 !important;
    padding: 16px !important;
    gap: 12px !important;
  }

  /* ---------- Advertising ---------- */
  .ad-clean {
    padding: 18px !important;
    border-radius: 20px !important;
  }

  .ad-clean .d-flex.flex-wrap.gap-2 {
    display: grid !important;
    grid-template-columns: 1fr;
  }

  .ad-clean .d-flex.flex-wrap.gap-2 .btn {
    width: 100%;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .ad-mini-card {
    padding: 15px !important;
    border-radius: 15px !important;
  }

  .ad-price {
    font-size: 1.35rem !important;
  }

  /* ---------- Portfolio ---------- */
  #portfolio .row {
    --bs-gutter-y: .8rem;
  }

  .portfolio-card {
    min-height: 0 !important;
  }

  /* ---------- Workflow ---------- */
  .step-line {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }

  .step-line::before {
    display: none !important;
  }

  .step-card {
    min-height: 0 !important;
    padding: 17px !important;
    border-radius: 18px !important;
  }

  .step-number {
    width: 38px !important;
    height: 38px !important;
    font-size: .9rem !important;
  }

  /* ---------- FAQ ---------- */
  #faq .row {
    --bs-gutter-y: .75rem;
  }

  /* ---------- Contact ---------- */
  #contact .row {
    --bs-gutter-y: .9rem;
  }

  .contact-card {
    padding: 17px !important;
  }

  .contact-line {
    align-items: flex-start !important;
  }

  .contact-line a,
  .contact-line span {
    overflow-wrap: anywhere;
  }

  #leadForm .form-control,
  #leadForm .form-select {
    min-height: 46px;
    font-size: 16px; /* Prevent iOS zoom */
  }

  #leadForm textarea.form-control {
    min-height: 128px;
  }

  #leadForm .btn-lg {
    min-height: 50px;
    font-size: .94rem;
  }

  /* ---------- Footer ---------- */
  .footer {
    padding-top: 38px !important;
    padding-bottom: 26px !important;
  }

  .footer .row {
    --bs-gutter-y: 1.2rem;
  }

  .footer img {
    width: 140px !important;
  }

  .footer .col-6 {
    width: 50%;
  }

  .footer .small {
    font-size: .8rem;
  }

  /* ---------- Fixed mobile contact bar ---------- */
  .bottom-contact {
    left: 8px !important;
    right: 8px !important;
    bottom: calc(8px + env(safe-area-inset-bottom)) !important;
    width: auto !important;
    padding: 7px !important;
    gap: 6px !important;
    border-radius: 18px !important;
    background: rgba(255,255,255,.97) !important;
    border: 1px solid rgba(148,163,184,.20);
    box-shadow: 0 14px 38px rgba(15,23,42,.18);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .bottom-contact .btn {
    flex: 1 1 0;
    min-height: 46px;
    margin: 0 !important;
    padding: .62rem .65rem !important;
    font-size: .82rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
  }
}

@media (max-width: 389.98px) {
  .home-hero h1,
  .home-hero .display-4 {
    font-size: 1.9rem !important;
  }

  .quick-tags {
    grid-template-columns: 1fr !important;
  }

  .mobile-home-jump a {
    font-size: .61rem;
  }

  .bottom-contact .btn {
    font-size: .76rem;
    padding-left: .45rem !important;
    padding-right: .45rem !important;
  }
}
/* =========================================================
   Accessibility / usability hardening
   ========================================================= */
:where(a, button, input, select, textarea):focus-visible {
  outline: 3px solid rgba(79, 70, 229, .42);
  outline-offset: 3px;
}

a, button, .btn, .tag {
  -webkit-tap-highlight-color: transparent;
}

.section,
header[id],
section[id] {
  scroll-margin-top: 90px;
}

.bottom-contact {
  display: none;
}

@media (max-width: 767.98px) {
  .bottom-contact {
    display: flex;
  }

  .mobile-home-jump {
    position: sticky;
    top: 64px;
  }

  .service-card,
  .course-card,
  .portfolio-card,
  .game-card,
  .faq-card,
  .contact-card,
  .knowledge-link-card {
    height: 100%;
  }

  .knowledge-link-card,
  .quick-tags .tag,
  .mobile-home-jump a {
    text-decoration: none;
  }

  .navbar .dropdown-item {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  .navbar,
  .bottom-contact,
  .mobile-home-jump,
  .quick-panel,
  #advertise {
    display: none !important;
  }

  body.site-home {
    padding: 0 !important;
  }
}