/* ===== secao de css responsivo ===== */

/* ===== abordagem mobile first ===== */
/* estilos base sao para mobile (320px+) */

/* ===== mobile pequeno (320px - 479px) ===== */
@media (max-width: 479px) {
  :root {
    --font-size-5xl: 2rem; /* 32px */
    --font-size-4xl: 1.75rem; /* 28px */
    --font-size-3xl: 1.5rem; /* 24px */
    --font-size-2xl: 1.25rem; /* 20px */
    --spacing-16: 3rem; /* 48px */
    --spacing-20: 4rem; /* 64px */
    --spacing-24: 5rem; /* 80px */
  }

  .container {
    padding: 0 var(--spacing-4);
  }

  /* secao de cabecalho */
  .header {
    top: 15px;
    left: 2px;
    right: 2px;
  }

  .nav-container {
    padding: 0 var(--spacing-4);
  }

  .nav-logo .logo {
    height: 50px;
  }

  .nav-menu {
    position: fixed;
    top: 51px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: rgba(248, 249, 250, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-8);
    transition: left var(--transition-normal);
    z-index: var(--z-dropdown);
    border-radius: 0 0 var(--radius-2xl) var(--radius-2xl);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-item {
    margin: var(--spacing-3) 0;
    width: 100%;
    text-align: center;
  }

  .nav-link {
    font-size: var(--font-size-lg);
    padding: var(--spacing-4) var(--spacing-6);
    display: block;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  /* secao principal */
  .main {
    margin-top: 54px;
    padding-left: 2px;
    padding-right: 2px;
  }

  /* secao hero */
  .hero {
    margin: 0;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
    text-align: center;
  }

  .hero-text {
    order: 2;
  }

  .hero-media {
    order: 1;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
    line-height: var(--line-height-tight);
  }

  .hero-description {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
    gap: var(--spacing-3);
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* secao de cronometro */
  .timer-section {
    top: 52px;
    padding: var(--spacing-2) 0;
    margin: 0;
  }

  .timer-content {
    gap: var(--spacing-2);
    padding: var(--spacing-4) 0;
  }

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

  .countdown {
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .countdown-item {
    min-width: 45px;
    padding: 6px;
    border-radius: 12px;
  }

  .countdown-number {
    font-size: var(--font-size-xl);
  }

  .countdown-label {
    font-size: 9px;
  }

  .countdown-separator {
    font-size: var(--font-size-xl);
    display: none;
  }

  /* cabecalhos de secao */
  .section-title {
    font-size: var(--font-size-3xl);
  }

  .section-subtitle {
    font-size: var(--font-size-base);
  }

  /* secao de programacao */
  .programming {
    margin: var(--spacing-12) var(--spacing-1);
  }

  .programming-nav {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    text-align: center;
    padding: var(--spacing-6);
  }

  .day-indicators {
    justify-content: center;
  }

  .day-indicator {
    width: 50px;
    height: 50px;
  }

  .day-controls {
    flex-direction: column;
    gap: var(--spacing-3);
  }

  .day-btn {
    width: 100%;
    justify-content: center;
  }

  /* linha do tempo */
  .timeline {
    padding-left: var(--spacing-6);
  }

  .timeline::before {
    left: var(--spacing-3);
  }

  .activity-card {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
    padding: var(--spacing-4);
    text-align: center;
  }

  .activity-card::before {
    left: -var(--spacing-6);
  }

  .activity-time {
    order: 1;
  }

  .activity-content {
    order: 2;
    flex-direction: column;
    text-align: center;
  }

  .activity-arrow {
    order: 3;
    align-self: center;
  }

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

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

  /* secao de ministrantes */
  .speakers {
    margin: var(--spacing-12) var(--spacing-1);
  }

  .speakers-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .speaker-image {
    height: 280px;
  }

  .tag {
    font-size: 9px;
    padding: 3px 6px;
    letter-spacing: 0.2px;
    line-height: 1.1;
    margin: 1px;
    white-space: nowrap;
    border-radius: var(--radius-md);
  }

  .speaker-tags {
    gap: 3px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-2);
  }

  .speaker-card {
    margin-bottom: var(--spacing-4);
  }

  .speaker-name {
    font-size: var(--font-size-xl);
    text-align: center;
    margin-bottom: var(--spacing-2);
  }

  .speaker-role {
    font-size: var(--font-size-sm);
    text-align: center;
    line-height: 1.4;
    margin-bottom: var(--spacing-3);
  }

  .speaker-info {
    padding: var(--spacing-4);
    text-align: center;
  }

  /* secao de minicursos */
  .minicourses {
    margin: var(--spacing-12) var(--spacing-1);
  }

  .minicourses-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .minicourse-card {
    padding: var(--spacing-6);
  }

  .minicourse-icon {
    width: 60px;
    height: 60px;
    font-size: var(--font-size-2xl);
  }

  .minicourse-title {
    font-size: var(--font-size-xl);
  }

  /* secao de parcerias */
  .partners {
    margin: var(--spacing-12) var(--spacing-1);
  }

  .partners-track {
    gap: var(--spacing-4);
  }

  .partner-logo {
    min-width: 150px;
    height: 100px;
    padding: var(--spacing-3);
  }

  .partner-logo img {
    max-height: 60px;
  }

  /* FAQ Section */
  .faq {
    margin: var(--spacing-12) var(--spacing-1);
  }

  .faq-question {
    padding: var(--spacing-4);
    font-size: var(--font-size-base);
  }

  .faq-answer p {
    padding: 0 var(--spacing-4) var(--spacing-4);
    font-size: var(--font-size-sm);
  }

  /* Footer */
  .footer {
    padding: var(--spacing-12) 0 var(--spacing-6);
    margin-top: var(--spacing-12);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    text-align: center;
    margin-bottom: var(--spacing-6);
  }

  .footer-section {
    margin-bottom: var(--spacing-6);
  }

  /* Manter seção de Contato visível */
  .footer-section:nth-child(2) {
    display: block;
  }

  /* Ocultar seção de Links Úteis no mobile */
  .footer-section:nth-child(3) {
    display: none;
  }

  .footer-section:last-child {
    margin-bottom: 0;
  }

  /* Melhor organização da primeira seção (logo + social) */
  .footer-section:first-child {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-4);
    text-align: center;
    width: 100%;
  }

  .footer-logo {
    margin-bottom: 0;
    display: flex;
    justify-content: center;
    width: 100%;
  }

  .footer-logo img {
    height: 50px;
    max-width: 220px;
    width: auto;
    display: block;
    margin: 0 auto;
  }

  .footer-description {
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin: 0 auto;
    max-width: 320px;
    text-align: center;
    width: 100%;
  }

  .footer-social {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-4);
    margin: 0;
    flex-wrap: wrap;
    width: 100%;
  }

  .footer-social .social-link {
    width: 48px;
    height: 48px;
    font-size: var(--font-size-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
  }

  .footer-social .social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
  }

  .footer-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4);
    color: var(--primary-color);
  }

  /* Layout responsivo melhorado para contatos */
  .footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: center;
    width: 100%;
  }

  .footer-contact .contact-item {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    max-width: 300px;
    width: 100%;
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .footer-contact .contact-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  .footer-contact .contact-item i {
    font-size: var(--font-size-xl);
    min-width: 24px;
    width: 24px;
    text-align: center;
    color: var(--primary-color);
    flex-shrink: 0;
  }

  .footer-contact .contact-item span {
    flex: 1;
    word-break: break-word;
    font-size: var(--font-size-sm);
    line-height: 1.4;
  }

  /* Organização melhor dos contatos */
  .footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: center;
  }

  .footer-contact .contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    line-height: 1.4;
    max-width: 280px;
    width: 100%;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    transition: background-color 0.3s ease;
  }

  .footer-contact .contact-item:hover {
    background: rgba(255, 255, 255, 0.1);
  }

  .footer-contact .contact-item i {
    font-size: var(--font-size-lg);
    min-width: 20px;
    width: 20px;
    text-align: center;
    color: var(--primary-color);
    flex-shrink: 0;
  }

  .footer-contact .contact-item span {
    flex: 1;
    word-break: break-word;
  }

  .footer-contact .contact-item span {
    flex: 1;
    word-break: break-word;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-6);
    text-align: center;
    font-size: var(--font-size-xs);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
  }

  .footer-bottom p {
    margin-bottom: var(--spacing-3);
    font-size: var(--font-size-xs);
    text-align: center;
    width: 100%;
  }

  .footer-credits {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    margin-bottom: var(--spacing-4);
    text-align: center;
    width: 100%;
  }

  .developers-social {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: center;
    justify-content: center;
    width: 100%;
    text-align: center;
  }

  .developer-info {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .dev-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    display: block;
    margin-bottom: var(--spacing-2);
    text-align: center;
  }

  .dev-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    align-items: center;
    justify-content: center;
  }

  .dev-links a {
    font-size: var(--font-size-xs);
    padding: var(--spacing-1);
    text-align: center;
    display: block;
  }

  /* Modal */
  .modal-content {
    width: 95%;
    max-height: 85vh;
  }

  .modal-body {
    padding: var(--spacing-6);
  }

  /* Video Container Responsivo - usando aspect-ratio */
  
  /* Fallback para navegadores sem suporte ao aspect-ratio */
  @supports not (aspect-ratio: 16/9) {
    .about-media .video-container {
      height: 200px;
    }
  }

  /* Back to Top */
  .back-to-top {
    bottom: var(--spacing-4);
    right: var(--spacing-4);
    width: 45px;
    height: 45px;
  }
}

/* ===== LARGE MOBILE (480px - 639px) ===== */
@media (min-width: 480px) and (max-width: 639px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .hero-actions .btn {
    width: auto;
  }

  .countdown {
    flex-wrap: nowrap;
  }

  .countdown-separator {
    display: block;
  }

  .activity-card {
    grid-template-columns: 80px 1fr auto;
    text-align: left;
  }

  .activity-content {
    flex-direction: row;
  }

  .minicourses-grid {
    grid-template-columns: 1fr;
  }

  .partners-track {
    gap: var(--spacing-6);
  }

  .partner-logo {
    min-width: 180px;
  }



  /* Speakers improvements for large mobile */
  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }

  .speaker-card {
    margin-bottom: var(--spacing-3);
  }

  .speaker-image {
    height: 250px;
  }

  .speaker-info {
    padding: var(--spacing-4);
  }

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

  .tag {
    font-size: 8px;
    padding: 3px 6px;
    margin: 1px;
    border-radius: var(--radius-sm);
    line-height: 1.2;
    letter-spacing: 0.1px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    max-width: 80px;
  }

  .speaker-tags {
    border-radius: 10px;
    gap: 2px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-2);
  }

  /* Fallback para navegadores sem suporte ao aspect-ratio - Mobile Grande */
  @supports not (aspect-ratio: 16/9) {
    .about-media .video-container {
      height: 250px;
    }
  }
}

/* ===== TABLET (640px - 767px) ===== */
@media (min-width: 640px) and (max-width: 767px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
  }

  .container {
    padding: 0 var(--spacing-6);
  }

  .hero-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    text-align: left;
  }

  .hero-text {
    order: 1;
  }

  .hero-media {
    order: 2;
  }

  .programming-nav {
    grid-template-columns: auto 1fr auto;
    text-align: center;
    z-index: var(--z-dropdown);
  }

  .day-controls {
    flex-direction: row;
  }

  .day-btn {
    width: auto;
  }

  .activity-card {
    grid-template-columns: 100px 1fr auto;
  }

  .speakers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
  }

  .speaker-image {
    height: 280px;
  }

  .tag {
    font-size: 10px;
    padding: 4px 8px;
    margin: 2px;
    border-radius: var(--radius-md);
    line-height: 1.1;
    letter-spacing: 0.2px;
    white-space: nowrap;
  }

  .speaker-tags {
    gap: 4px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-2);
  }

  .minicourses-grid {
    grid-template-columns: 1fr;
  }

  /* Fallback para navegadores sem suporte ao aspect-ratio - Tablet */
  @supports not (aspect-ratio: 16/9) {
    .about-media .video-container {
      height: 300px;
    }
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    text-align: center;
  }

  .footer-section {
    margin-bottom: var(--spacing-4);
  }

  .footer-logo img {
    height: 50px;
  }

  .footer-description {
    font-size: var(--font-size-base);
    max-width: 400px;
    margin: 0 auto var(--spacing-4);
  }

  .footer-contact .contact-item {
    justify-content: center;
    font-size: var(--font-size-sm);
  }

  .developers-social {
    flex-direction: row;
    gap: var(--spacing-6);
    justify-content: center;
    flex-wrap: wrap;
  }

  .dev-links {
    flex-direction: row;
    gap: var(--spacing-3);
  }


}

/* ===== TABLET LARGE (768px - 1023px) ===== */
@media (min-width: 768px) and (max-width: 1023px) {
  /* Manter navegação normal até 900px para melhor UX em tablets */
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
    padding-top: 0;
  }

  .main {
    margin-top: 105px; /* Ajuste para header maior */
  }

  .timer-section {
    top: 107px;
  }
}

/* ===== TABLET MOBILE BREAKPOINT (900px) ===== */
@media (max-width: 900px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(248, 249, 250, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: var(--spacing-8);
    transition: left var(--transition-normal);
    z-index: var(--z-dropdown);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .main {
    margin-top: 85px;
  }

  .timer-section {
    top: 87px;
  }

  .hero-title {
    font-size: var(--font-size-5xl);
  }

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

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

  .footer-content {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* ===== DESKTOP SMALL (1024px - 1279px) ===== */
@media (min-width: 1024px) and (max-width: 1279px) {
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    position: static;
    width: auto;
    height: auto;
    background: transparent;
    flex-direction: row;
    justify-content: flex-end;
    align-items: center;
    padding-top: 0;
  }

  .nav-item {
    margin: 0;
    width: auto;
  }

  .nav-link {
    font-size: var(--font-size-sm);
    padding: var(--spacing-3) var(--spacing-4);
    width: auto;
  }

  .main {
    margin-top: 90px;
  }

  .timer-section {
    top: 92px;
  }

  .hero-content {
    gap: var(--spacing-16);
  }

  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .footer-content {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* ===== DESKTOP LARGE (1280px - 1535px) ===== */
@media (min-width: 1280px) and (max-width: 1535px) {
  .container {
    max-width: var(--container-xl);
  }

  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

/* ===== DESKTOP EXTRA LARGE (1536px+) ===== */
@media (min-width: 1536px) {
  .container {
    max-width: var(--container-2xl);
  }

  .hero-title {
    font-size: var(--font-size-7xl);
  }

  .section-title {
    font-size: var(--font-size-6xl);
  }

  .speakers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

/* ===== LANDSCAPE ORIENTATION ===== */
@media (orientation: landscape) and (max-height: 600px) {
  .hero {
    padding: var(--spacing-12) 0;
  }

  .timer-section {
    position: relative;
    top: auto;
    margin: var(--spacing-4) var(--spacing-1);
  }

  .nav-menu {
    height: calc(100vh - 60px);
    padding-top: var(--spacing-6);
  }

  .modal-content {
    max-height: 90vh;
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  .loading-screen,
  .nav-toggle,
  .back-to-top,
  .modal-overlay,
  .timer-section {
    display: none !important;
  }

  .header {
    position: static;
    background: white !important;
    box-shadow: none !important;
  }

  .main {
    margin-top: 0;
    padding: 0;
  }

  .hero,
  .programming,
  .speakers,
  .minicourses,
  .partners,
  .faq {
    margin: var(--spacing-8) 0;
    box-shadow: none !important;
    border: 1px solid #ccc !important;
  }

  .btn {
    border: 1px solid #000 !important;
    background: white !important;
    color: black !important;
  }

  .footer {
    background: white !important;
    color: black !important;
  }

  .section-title,
  .hero-title {
    color: black !important;
  }

  .activity-card,
  .speaker-card,
  .minicourse-card,
  .faq-item {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}

/* ===== HIGH DPI DISPLAYS ===== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .partner-logo img,
  .speaker-image img,
  .nav-logo .logo {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  .scroll-reveal,
  .scroll-reveal-left,
  .scroll-reveal-right,
  .scroll-reveal-scale {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .stagger-item {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .floating-shape {
    animation: none !important;
  }

  .partners-track {
    animation: none !important;
  }

  .countdown-number {
    transition: none !important;
  }

  .hover-lift:hover,
  .hover-scale:hover,
  .hover-rotate:hover,
  .hover-tilt:hover {
    transform: none !important;
  }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
  /* This can be implemented if dark mode is desired */
  /* Currently maintaining light theme as specified */
}

/* ===== CONTAINER QUERIES (Future Enhancement) ===== */
/* When container queries are widely supported, these can be used for more granular responsive design */

/* ===== ACCESSIBILITY ENHANCEMENTS ===== */
@media (prefers-contrast: high) {
  .btn {
    border: 2px solid currentColor;
  }

  .activity-card,
  .speaker-card,
  .minicourse-card,
  .faq-item {
    border-width: 2px;
  }

  .section-divider,
  .hero-divider,
  .day-divider {
    height: 6px;
  }
}

/* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .nav-link {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .activity-card {
    min-height: 60px;
  }

  .day-indicator {
    min-width: 44px;
    min-height: 44px;
  }

  .social-link {
    min-width: 44px;
    min-height: 44px;
  }

  .faq-question {
    min-height: 60px;
  }

  /* Remove hover effects on touch devices */
  .hover-lift:hover,
  .hover-scale:hover,
  .hover-glow:hover,
  .hover-rotate:hover {
    transform: none;
    box-shadow: var(--shadow-md);
  }

  .speaker-card:hover .speaker-image img {
    filter: grayscale(0%);
  }

  .partner-logo:hover img {
    filter: grayscale(0%);
  }
}

/* ===== WIDE SCREENS (Ultra-wide monitors) ===== */
@media (min-width: 1920px) {
  .container {
    max-width: 1600px;
  }

  .hero-content {
    gap: var(--spacing-24);
  }

  .speakers-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== VERY SMALL SCREENS (< 320px) ===== */
@media (max-width: 319px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --spacing-4: 0.75rem;
    --spacing-6: 1rem;
    --spacing-8: 1.5rem;
  }

  .container {
    padding: 0 var(--spacing-3);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .countdown-item {
    min-width: 50px;
    padding: var(--spacing-2);
  }

  .countdown-number {
    font-size: var(--font-size-2xl);
  }

  .activity-card {
    padding: var(--spacing-3);
  }

  .day-indicator {
    width: 40px;
    height: 40px;
  }



  /* Compact timer for very small screens */
  .timer-section.compact {
    padding: var(--spacing-1) 0;
  }

  .timer-section.compact .timer-content {
    gap: var(--spacing-1);
  }

  /* Speaker improvements for ultra small screens */
  .speaker-tags {
    gap: 2px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-1);
  }

  .tag {
    font-size: 7px;
    padding: 2px 5px;
    letter-spacing: 0.1px;
    line-height: 1.1;
    margin: 1px;
    border-radius: 6px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    max-width: 65px;
    display: inline-block;
  }

  .speaker-info {
    padding: var(--spacing-3);
  }

  .speaker-name {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-1);
  }

  .speaker-role {
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-2);
    line-height: 1.3;
  }

  .speaker-image {
    height: 220px;
  }

  .timer-section.compact .timer-title {
    font-size: var(--font-size-xs);
  }

  .timer-section.compact .countdown {
    gap: 2px;
  }

  .timer-section.compact .countdown-item {
    width: 40px;
    padding: 4px;
    border-radius: 8px;
  }

  .timer-section.compact .countdown-number {
    font-size: var(--font-size-lg);
  }

  .timer-section.compact .countdown-label {
    font-size: 8px;
  }

  /* Footer ultra mobile improvements */
  .footer {
    padding: var(--spacing-8) 0 var(--spacing-4);
    margin-top: var(--spacing-8);
  }

  .footer-content {
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
  }

  .footer-section {
    margin-bottom: var(--spacing-4);
  }

  .footer-logo img {
    height: 40px;
    max-width: 180px;
  }

  .footer-description {
    font-size: var(--font-size-xs);
    line-height: 1.4;
    margin-bottom: var(--spacing-3);
    padding: 0 var(--spacing-2);
  }

  .footer-social {
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
    justify-content: center;
  }

  .footer-social .social-link {
    width: 44px;
    height: 44px;
    font-size: var(--font-size-lg);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
  }

  .footer-social .social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
  }

  .footer-title {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-3);
  }

  .footer-contact .contact-item {
    font-size: var(--font-size-xs);
    max-width: 280px;
    padding: var(--spacing-2) var(--spacing-3);
    gap: var(--spacing-2);
  }

  .footer-contact .contact-item i {
    font-size: var(--font-size-lg);
    min-width: 20px;
    width: 20px;
  }

  .footer-contact .contact-item span {
    font-size: var(--font-size-xs);
    line-height: 1.3;
  }

  .footer-bottom {
    padding-top: var(--spacing-3);
  }

  .footer-bottom p {
    margin-bottom: var(--spacing-2);
    font-size: 10px;
    line-height: 1.3;
  }

  .footer-credits {
    font-size: 10px;
    margin-bottom: var(--spacing-3);
  }

  .developers-social {
    gap: var(--spacing-2);
  }

  .dev-name {
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-1);
  }

  .dev-links a {
    font-size: 10px;
    padding: var(--spacing-1) var(--spacing-2);
    word-break: break-all;
  }
}

/* ===== FOOTER MOBILE FIXES ===== */
/* Correções específicas para footer em diferentes tamanhos de tela */

@media (max-width: 400px) {
  .footer-section:first-child {
    gap: var(--spacing-3);
  }

  .footer-logo img {
    height: 45px;
    max-width: 200px;
  }

  .footer-description {
    font-size: var(--font-size-sm);
    max-width: 280px;
  }

  .footer-social {
    gap: var(--spacing-3);
  }

  .footer-social .social-link {
    width: 42px;
    height: 42px;
    font-size: var(--font-size-base);
  }

  /* Contatos para telas muito pequenas */
  .footer-contact .contact-item {
    max-width: 280px;
    padding: var(--spacing-2);
    gap: var(--spacing-2);
    flex-direction: row;
    align-items: center;
    text-align: left;
  }

  .footer-contact .contact-item i {
    min-width: 18px;
    width: 18px;
    font-size: var(--font-size-base);
  }

  .footer-contact .contact-item span {
    font-size: var(--font-size-xs);
  }

  .developers-social {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3);
  }

  .dev-links {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
  }
}

@media (min-width: 401px) and (max-width: 640px) {
  .footer-section:first-child {
    gap: var(--spacing-4);
  }

  .footer-description {
    max-width: 350px;
    font-size: var(--font-size-base);
  }

  .footer-social {
    gap: var(--spacing-4);
  }

  .footer-social .social-link {
    width: 46px;
    height: 46px;
    font-size: var(--font-size-lg);
  }

  .developers-social {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-4);
  }

  .dev-links {
    flex-direction: row;
    gap: var(--spacing-2);
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ===== ADDITIONAL SPEAKER TAGS IMPROVEMENTS ===== */
/* Para garantir que as tags sempre funcionem bem em mobile */
@media (max-width: 576px) {
  .speaker-tags {
    gap: 3px !important;
    justify-content: center !important;
    margin-top: var(--spacing-2) !important;
    flex-wrap: wrap !important;
  }

  .tag {
    font-size: 8px !important;
    padding: 2px 5px !important;
    margin: 1px !important;
    white-space: nowrap !important;
    line-height: 1.1 !important;
    letter-spacing: 0.1px !important;
    border-radius: var(--radius-sm) !important;
    text-overflow: ellipsis !important;
    overflow: hidden !important;
    max-width: 70px !important;
    display: inline-block !important;
  }

  .speaker-info {
    text-align: center !important;
    padding: var(--spacing-3) !important;
  }

  .speaker-card {
    max-width: 100% !important;
    margin-bottom: var(--spacing-4) !important;
  }

  .speaker-name {
    margin-bottom: var(--spacing-2) !important;
  }

  .speaker-role {
    margin-bottom: var(--spacing-3) !important;
    line-height: 1.4 !important;
  }
}

/* Para dispositivos extremamente pequenos */
@media (max-width: 360px) {
  .speaker-tags {
    gap: 1px !important;
    margin-top: var(--spacing-1);
    justify-content: center;
    flex-wrap: wrap;
  }

  .tag {
    font-size: 6px !important;
    padding: 1px 4px !important;
    margin: 1px !important;
    border-radius: 4px !important;
    line-height: 1.1 !important;
    letter-spacing: 0.1px !important;
    white-space: nowrap !important;
    text-overflow: ellipsis !important;
    overflow: hidden !important;
    max-width: 55px !important;
    display: inline-block !important;
  }

  .speaker-name {
    font-size: var(--font-size-lg) !important;
    margin-bottom: var(--spacing-1) !important;
  }

  .speaker-role {
    font-size: var(--font-size-xs) !important;
    line-height: 1.3 !important;
    margin-bottom: var(--spacing-2) !important;
  }

  .speaker-info {
    padding: var(--spacing-2) var(--spacing-3) !important;
  }

  .speaker-image {
    height: 200px !important;
  }
}