/* Reset e configurações globais */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: #1a202c;
    background-color: #ffffff;
    font-size: 16px;
    letter-spacing: -0.01em;
}

/* Skip link para acessibilidade */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header e Navegação */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

nav h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

nav a:hover,
nav a:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    outline: 2px solid rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.03)" points="0,1000 1000,0 1000,1000"/></svg>');
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: linear-gradient(to right, #ffffff, #f1f5f9);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    max-width: 650px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.6;
    background: linear-gradient(to right, #ffffff, #f1f5f9);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Seções de critérios */
section {
    padding: 4rem 0;
    position: relative;
}

section:nth-child(even) {
    background-color: #f8fafc;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(79, 70, 229, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(236, 72, 153, 0.02) 0%, transparent 50%);
}

section h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1.5rem;
    position: relative;
    letter-spacing: -0.02em;
}

section h2::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    border-radius: 2px;
}

section > .container > p {
    font-size: 1.125rem;
    margin-bottom: 3rem;
    color: #64748b;
    max-width: 800px;
    line-height: 1.7;
}

/* Grid de exemplos */
.examples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.example {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.05),
        0 4px 16px rgba(0, 0, 0, 0.05),
        0 8px 32px rgba(0, 0, 0, 0.03);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.example::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #4f46e5, #7c3aed, #ec4899);
}

.example:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.08),
        0 8px 32px rgba(0, 0, 0, 0.08),
        0 16px 64px rgba(0, 0, 0, 0.06);
}

.example h3 {
    color: #1e293b;
    margin-bottom: 1.5rem;
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* Imagens */
img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* Botões */
button {
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    color: white;
    border: none;
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    margin: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.1),
        0 4px 16px rgba(79, 70, 229, 0.2);
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

button:hover::before {
    left: 100%;
}

button:hover,
button:focus {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    outline: 2px solid rgba(79, 70, 229, 0.3);
    outline-offset: 2px;
    transform: translateY(-2px);
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.15),
        0 8px 32px rgba(79, 70, 229, 0.3);
}

button:disabled {
    background: #94a3b8;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Ícones em botões */
button[aria-label] {
    font-size: 1.5rem;
    padding: 1.25rem;
    min-width: 65px;
    min-height: 65px;
    border-radius: 16px;
}

/* Elementos de mídia */
audio, video {
    width: 100%;
    max-width: 100%;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    outline: none;
}

audio:focus, video:focus {
    outline: 2px solid #4f46e5;
    outline-offset: 4px;
}

/* Transcrições */
.transcript,
.description {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid #bae6fd;
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
}

.transcript::before,
.description::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(135deg, #0ea5e9, #0284c7);
}

.transcript h4,
.description h4 {
    color: #0c4a6e;
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
    font-weight: 600;
}

.full-transcript {
    background: #fefefe;
    padding: 2.5rem;
    border-radius: 16px;
    margin-top: 1.5rem;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.transcript-line {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.timestamp {
    font-weight: 600;
    color: #475569;
    min-width: 130px;
    font-family: 'Courier New', monospace;
    background: #e2e8f0;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.875rem;
}

.speaker {
    font-weight: 600;
    color: #4f46e5;
    min-width: 110px;
    background: rgba(79, 70, 229, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.sound {
    font-style: italic;
    color: #7c3aed;
    background: rgba(124, 58, 237, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.text {
    flex: 1;
    color: #334155;
    line-height: 1.6;
}

/* Código */
code {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    color: #dc2626;
    font-size: 0.875em;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

/* Tabelas */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    border: 1px solid #ddd;
    padding: 0.8rem;
    text-align: left;
}

th {
    background-color: #f2f2f2;
    font-weight: bold;
}

/* Recursos */
.resources {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    position: relative;
}

.resources::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(79, 70, 229, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 2;
}

.resource {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 
        0 1px 3px rgba(0, 0, 0, 0.05),
        0 4px 16px rgba(0, 0, 0, 0.05),
        0 8px 32px rgba(0, 0, 0, 0.03);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.resource::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #4f46e5, #7c3aed, #ec4899);
}

.resource:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.08),
        0 8px 32px rgba(0, 0, 0, 0.08),
        0 16px 64px rgba(0, 0, 0, 0.06);
}

.resource h3 {
    color: #1e293b;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.resource ul {
    list-style-type: none;
}

.resource li {
    margin-bottom: 0.75rem;
}

.resource a {
    color: #4f46e5;
    text-decoration: none;
    padding: 0.5rem 0;
    display: block;
    transition: all 0.3s ease;
    font-weight: 500;
    border-radius: 8px;
    padding-left: 0.75rem;
    position: relative;
}

.resource a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #7c3aed;
    transition: transform 0.3s ease;
}

.resource a:hover::before {
    transform: translateX(4px);
}

.resource a:hover,
.resource a:focus {
    color: #6366f1;
    background: rgba(79, 70, 229, 0.05);
    outline: 2px solid rgba(79, 70, 229, 0.2);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    text-align: center;
    padding: 3rem 0;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.02)" points="0,0 1000,1000 0,1000"/></svg>');
    pointer-events: none;
}

footer .container {
    position: relative;
    z-index: 2;
}

footer p {
    font-size: 1rem;
    opacity: 0.8;
    margin: 0;
    font-weight: 400;
}

/* Responsividade */
@media (max-width: 768px) {
    body {
        font-size: 15px;
    }
    
    nav {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    nav h1 {
        font-size: 1.5rem;
    }
    
    nav ul {
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    nav a {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .hero h1 {
        font-size: 2.25rem;
        margin-bottom: 1rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    section h2 {
        font-size: 1.875rem;
    }
    
    section > .container > p {
        font-size: 1rem;
    }
    
    .examples {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }
    
    .example {
        padding: 2rem;
    }
    
    .example h3 {
        font-size: 1.25rem;
    }
    
    .transcript-line {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0.875rem;
    }
    
    .timestamp,
    .speaker {
        min-width: auto;
        align-self: flex-start;
    }
    
    button[aria-label] {
        padding: 1rem;
        min-width: 55px;
        min-height: 55px;
        font-size: 1.25rem;
    }
    
    .resource-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin-top: 2rem;
    }
    
    .resource {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    section h2 {
        font-size: 1.625rem;
    }
    
    .example {
        padding: 1.5rem;
    }
    
    .transcript,
    .description,
    .full-transcript {
        padding: 1.5rem;
    }
    
    .resource {
        padding: 1.5rem;
    }
}

/* Estados de foco melhorados */
*:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Links acessíveis */
a {
    color: #3498db;
    text-decoration: underline;
}

a:hover,
a:focus {
    color: #2980b9;
}

/* Contraste adequado para textos */
.hero,
header,
footer {
    background-color: #2c3e50;
}

/* Espaçamento adequado para leitura */
p {
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Estilos para listas ordenadas e não ordenadas */
ul, ol {
    padding-left: 2rem;
    margin-bottom: 1rem;
}

/* Melhorias visuais para elementos interativos */
details {
    margin: 1rem 0;
}

summary {
    cursor: pointer;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 4px;
    font-weight: bold;
}

summary:hover,
summary:focus {
    background: #e9ecef;
}

/* Estilos para melhor acessibilidade de cor */
.error {
    color: #dc3545;
}

.success {
    color: #28a745;
}

.warning {
    color: #ffc107;
}

.info {
    color: #17a2b8;
}