:root {
    --void: #05070a;
    --teal: #00e5ff;
    --violet: #9d8bff;
    --text: #e8f2f1;
    --font-display: 'Chakra Petch', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

body {
    background-color: #000;
    color: var(--text);
    font-family: var(--font-body);
}

/* Fundo Premium v2 */
body::before {
    content: '';
    position: fixed; inset: 0;
    background-image:
      linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: -1;
}

.panel {
    background-color: #0d131f;
    border: 1px solid #1f2937;
}

/* Estilo de Input Premium Inspirado no seu v2 */
.input-dark {
    background-color: #0d1117;
    border: 1px solid #1f2937;
    color: #fff;
    font-family: var(--font-body);
    transition: all 0.2s ease;
}

.input-dark:focus {
    outline: none;
    border-color: var(--teal);
    background-color: #0d1117;
    box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
}

.btn-primary {
    background: linear-gradient(135deg, var(--teal), var(--violet));
    color: #05070a;
    font-weight: 700;
    font-family: var(--font-display);
    transition: transform 0.15s, box-shadow 0.15s;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 22px rgba(102, 252, 241, 0.25);
}

.badge {
    background-color: #0b0c10;
    border: 1px solid #45a29e;
    color: #66fcf1;
}

textarea {
    resize: none;
    overflow: hidden;
}

/* Animação e estilo do novo Header */
.scan-header {
    display: flex; justify-content: space-between; align-items: flex-end;
    padding-bottom: 22px; margin-bottom: 26px;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.scan-header::after {
    content: '';
    position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--teal), var(--violet), transparent);
    animation: scan 5s linear infinite;
}

@keyframes scan {
    0% { transform: translateX(-100%); opacity: 0; }
    10% { opacity: 1; }
    50% { transform: translateX(0%); }
    90% { opacity: 1; }
    100% { transform: translateX(100%); opacity: 0; }
}

.logo-block h1 {
    font-family: var(--font-display);
    font-weight: 700; font-size: 28px;
    display: flex; align-items: center; gap: 10px;
}

.logo-block h1 .glyph {
    background: linear-gradient(135deg, var(--teal), var(--violet));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

.cursor {
    display: inline-block; width: 9px; height: 20px;
    background: var(--teal); margin-left: 4px;
    animation: blink 1.1s step-end infinite;
    box-shadow: 0 0 8px var(--teal);
}

@keyframes blink { 50% { opacity: 0; } }

.logo-block p {
    font-family: var(--font-mono); font-size: 11px;
    letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--teal-dim); margin-top: 6px;
}

/* =========================================
   ANIMAÇÕES E EFEITOS DA TELA DE LOGIN
========================================= */

/* Efeito de entrada suave (Fade Up) */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fade-up {
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }

/* Orbes Neon Flutuantes de Fundo */
.orb { position: fixed; border-radius: 50%; filter: blur(100px); opacity: 0.15; z-index: 0; pointer-events: none; }
.orb1 { width: 500px; height: 500px; background: radial-gradient(circle, var(--teal), transparent 70%); top: -100px; left: -100px; animation: drift1 20s ease-in-out infinite; }
.orb2 { width: 600px; height: 600px; background: radial-gradient(circle, var(--violet), transparent 70%); bottom: -200px; right: -100px; animation: drift2 25s ease-in-out infinite alternate; }

@keyframes drift1 { 0%, 100% { transform: translate(0,0); } 50% { transform: translate(100px, 100px); } }
@keyframes drift2 { 0%, 100% { transform: translate(0,0); } 50% { transform: translate(-150px, -100px); } }

/* Textos do Sistema Flutuantes (Drift Text) */
.drift-text {
    position: fixed; font-family: var(--font-mono); font-size: 12px;
    color: rgba(102, 252, 241, 0.15); white-space: nowrap; z-index: 0;
    animation: rise linear infinite;
    pointer-events: none;
}
@keyframes rise {
    0% { transform: translateY(100vh); opacity: 0; }
    10%, 90% { opacity: 1; }
    100% { transform: translateY(-20vh); opacity: 0; }
}

/* =========================================
   SISTEMA DE FLASHCARDS 3D #ISSUE #43
========================================= */
.flip-container {
    perspective: 1000px;
    width: 100%;
}

.flipper {
    transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
    transform-style: preserve-3d;
    position: relative;
    width: 100%;
    /* O Grid faz com que Frente e Verso ocupem exatamente o mesmo espaço, 
       ajustando a altura automaticamente para caber frases grandes */
    display: grid; 
}

.flip-container.flipped .flipper {
    transform: rotateX(180deg);
}

.front, .back {
    grid-area: 1 / 1; /* Coloca os dois na mesma "célula" */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    width: 100%;
}

.back {
    transform: rotateX(180deg);
}

/* Linhas laterais de sotaque inspiradas no protótipo */
.accent-line-teal { border-left: 3px solid var(--teal-dim); }
.accent-line-violet { border-left: 3px solid var(--violet); }

/* Linha de sotaque lateral do card */
.accent-line-teal { border-left: 3px solid var(--teal-dim); }

/* Motor de animação suave (Accordion) */
/* Animações e Cards */
.flashcard-reveal {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease-out, opacity 0.3s ease-out;
    opacity: 0;
    pointer-events: none;
}
.flashcard-reveal > div { overflow: hidden; }

.registro-item.revealed .flashcard-reveal {
    grid-template-rows: 1fr;
    opacity: 1;
    pointer-events: auto;
}

.registro-item.revealed .hint-text {
    display: none; /* Esconde o "Clique para revelar" */
}

.chevron { transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.registro-item.revealed .chevron { transform: rotate(180deg); }

/* Esconder Scrollbars */
.hide-scrollbar::-webkit-scrollbar { display: none; }
.hide-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

/* =========================================
   ANIMAÇÃO DE CARREGAMENTO SCI-FI
========================================= */
@keyframes loadingBar {
    0% {transform: translateX(-100%);}
    50% {transformo: translateX(0%);}
    100% {transform: translateX(100%);}
}

.sci-fi-loader {
    width: 200px; height: 2px;
    background-color: #1f2937;
    overflow: hidden;
    position: relative;
    border-radius: 2px;
}

.sci-fi-loader::after {
    content: ''; 
    position: absolute; top: 0; left: 0; bottom: 0; width: 100%;
    background: linear-gradient(90deg, transparent, #00e5ff, transparent);
    animation: loadingBar 1.5s infinite ease-in-out; 
}