/* ==============================================
   Branding Summit Festival 2025
   Estilos Personalizados
   ============================================== */

/* ==============================================
   1. VARIÁVEIS CSS
   ============================================== */
:root {
    --color-brand-green: #39ff14;
    --color-brand-purple: #9333ea;
    --color-dark-bg: #10101A;
    --color-text-primary: #f0f0f0;
    --color-text-secondary: #9ca3af;
    --color-glass: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    --font-display: 'Anton', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* ==============================================
   2. ESTILOS BASE
   ============================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--color-dark-bg);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(57, 255, 20, 0.1), transparent 30%),
        radial-gradient(circle at 80% 90%, rgba(147, 51, 234, 0.1), transparent 30%);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==============================================
   3. TIPOGRAFIA
   ============================================== */
.font-anton {
    font-family: var(--font-display);
    letter-spacing: 0.05em;
}

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
}

/* ==============================================
   4. CORES UTILITÁRIAS
   ============================================== */
.brand-green { 
    color: var(--color-brand-green); 
}

.bg-brand-green { 
    background-color: var(--color-brand-green); 
}

.brand-purple { 
    color: var(--color-brand-purple); 
}

/* ==============================================
   5. EFEITOS E ANIMAÇÕES
   ============================================== */
.glow-hover {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.glow-hover:hover { 
    box-shadow: 0 0 12px var(--color-brand-green), 
                0 0 24px var(--color-brand-green);
}

/* Glass morphism card */
.glass-card {
    background: var(--color-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    transition: all 0.3s ease;
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

/* ==============================================
   6. SCROLLBAR PERSONALIZADA
   ============================================== */
::-webkit-scrollbar { 
    width: 8px; 
}

::-webkit-scrollbar-track { 
    background: #1a1a2a; 
}

::-webkit-scrollbar-thumb { 
    background: linear-gradient(45deg, var(--color-brand-green), var(--color-brand-purple)); 
    border-radius: 4px; 
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, var(--color-brand-purple), var(--color-brand-green));
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-brand-green) #1a1a2a;
}

/* ==============================================
   7. COMPONENTES
   ============================================== */

/* Botões */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-weight: bold;
    text-transform: uppercase;
    border-radius: 9999px;
    transition: all 0.3s ease;
    text-decoration: none;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-brand-green);
    color: black;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--color-brand-green);
}

.btn-outline {
    border: 2px solid var(--color-brand-green);
    color: var(--color-brand-green);
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--color-brand-green);
    color: black;
}

/* Header scrollado */
header.scrolled {
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Ajuste para botões em mobile */
@media (max-width: 640px) {
    .bg-brand-green,
    .border-brand-green,
    a[href="#inscricao"] {
        padding: 1rem 1.5rem;
        line-height: 1.4;
        min-height: 60px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        white-space: normal;
    }
}

/* ==============================================
   8. ANIMAÇÕES PERSONALIZADAS
   ============================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--color-brand-green);
    }
    50% {
        box-shadow: 0 0 20px var(--color-brand-green), 
                    0 0 30px var(--color-brand-green);
    }
}

.animate-glow {
    animation: glow 2s ease-in-out infinite;
}

/* ==============================================
   9. RESPONSIVIDADE
   ============================================== */

/* Mobile First Approach */
.container {
    width: 100%;
    padding: 0 1rem;
    margin: 0 auto;
}

/* Tablet */
@media (min-width: 768px) {
    .container {
        max-width: 750px;
    }
    
    .glass-card {
        padding: 2rem;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .container {
        max-width: 1024px;
    }
}

/* Large Desktop */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
}

/* Extra Large Desktop */
@media (min-width: 1536px) {
    .container {
        max-width: 1536px;
    }
}

/* ==============================================
   10. OTIMIZAÇÕES DE PERFORMANCE
   ============================================== */

/* Desabilitar animações para usuários que preferem movimento reduzido */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Otimização de fontes */
.font-display-swap {
    font-display: swap;
}

/* Lazy loading para imagens */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* ==============================================
   11. UTILIDADES ADICIONAIS
   ============================================== */

/* Acessibilidade - Skip to content */
.skip-to-content {
    position: absolute;
    left: -9999px;
    z-index: 999;
    padding: 1em;
    background-color: var(--color-dark-bg);
    color: var(--color-text-primary);
    text-decoration: none;
}

.skip-to-content:focus {
    left: 50%;
    transform: translateX(-50%);
    top: 1rem;
}

/* Focus visible para acessibilidade */
*:focus-visible {
    outline: 2px solid var(--color-brand-green);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .no-print {
        display: none !important;
    }
}

/* ==============================================
   12. AJUSTES ESPECÍFICOS PARA PALESTRANTES
   ============================================== */
.speaker-card {
    position: relative;
    overflow: hidden;
}

.speaker-card img {
    transition: transform 0.5s ease, filter 0.5s ease;
    filter: grayscale(100%);
}

.speaker-card:hover img {
    transform: scale(1.1);
    filter: grayscale(0%);
}

.speaker-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.speaker-card:hover .speaker-overlay {
    opacity: 1;
}