:root {
    font-family: Inter, system-ui, sans-serif;
    
    /* Variáveis para o Modo Escuro (Padrão) */
    --bg-color: #0b1228;
    --bg-gradient: radial-gradient(circle at top left, rgba(89, 116, 231, 0.45), transparent 35%),
                    radial-gradient(circle at bottom right, rgba(8, 197, 255, 0.18), transparent 30%),
                    linear-gradient(180deg, #0b1228 0%, #161f3f 100%);
    --text-color: #f8fafc;
    --glass-bg: rgba(0, 0, 0, 0.3);
    --glass-border: rgba(255, 255, 255, 0.12);
    --nav-bg: rgba(11, 18, 40, 0.8);
    --card-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
    --header-p: #d9e2ff;
    --section-bg: rgba(15, 24, 50, 0.8);
    --input-bg: rgba(255, 255, 255, 0.08);
    --secondary-btn-bg: rgba(255, 255, 255, 0.06);
    --correct-text: #4ade80;
    --link-color: #7dd3fc;
    --link-border: rgba(125, 211, 252, 0.45);
    --input-border: rgba(255, 255, 255, 0.2);
    --placeholder-color: #cbd5e1;
}

[data-theme="light"] {
    --bg-color: #f1f5f9;
    --bg-gradient: radial-gradient(circle at top left, rgba(89, 116, 231, 0.15), transparent 35%),
                    radial-gradient(circle at bottom right, rgba(8, 197, 255, 0.1), transparent 30%),
                    linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    --text-color: #1e293b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --nav-bg: rgba(255, 255, 255, 0.8);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --header-p: #475569;
    --section-bg: rgba(255, 255, 255, 0.5);
    --input-bg: rgba(255, 255, 255, 0.9);
    --secondary-btn-bg: rgba(0, 0, 0, 0.05);
    --correct-text: #166534;
    --link-color: #0369a1;
    --link-border: rgba(3, 105, 161, 0.45);
    --input-border: rgba(0, 0, 0, 0.3);
    --placeholder-color: #64748b;
}

body {
    min-height: 100vh;
    margin: 0;
    padding: 0 0 30px 0;
    background: var(--bg-gradient);
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background 0.3s ease, color 0.3s ease;
}

/* Layout base */
.container {
    max-width: 860px;
    margin: 0 auto;
}

/* Estilo de Cartão (Glassmorphism) para o conteúdo principal */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(15px);
    border-radius: 24px;
    padding: 36px;
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
}

/* Navbar Real: Barra fixa no topo com efeito de vidro */
nav {
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0.5rem 0;
    margin-bottom: 3rem;
}

/* Garante que o container dentro da nav não herde estilos de cartão */
nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

/* Garante que as listas internas fiquem na horizontal */
nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

nav ul li {
    padding: 0 10px;
    margin-bottom: 0; /* Remove margens do Pico que podem quebrar o alinhamento */
}

/* Estilos para o menu colapsável no mobile */
.mobile-menu-btn {
    display: none !important;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex !important;
    }

    .nav-links {
        display: none !important; /* Esconde por padrão no mobile */
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--nav-bg);
        backdrop-filter: blur(15px);
        border-bottom: 1px solid var(--glass-border);
        padding: 20px 0;
        z-index: 999;
    }

    .nav-links.active {
        display: flex !important; /* Mostra quando a classe 'active' for adicionada via JS */
    }

    .nav-links li {
        padding: 15px 0;
        width: 100%;
        text-align: center;
    }
}

nav ul li a {
    color: var(--link-color);
    text-decoration: none;
}

nav ul li a:hover {
    color: var(--text-color);
    border-color: var(--link-color);
}

main header {
    text-align: center;
    margin-bottom: 28px;
}
header img {
    display: block;
    margin: 0 auto 18px auto;
    height: 72px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none !important;
}
header h1 {
    margin-bottom: 0.4rem;
    font-size: clamp(2.4rem, 3vw, 3.4rem); /* Ajustado para ser consistente */
}
header p {
    max-width: 720px;
    margin: 0 auto;
    color: var(--header-p);
    font-size: 1.05rem;
}
header a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid var(--link-border);
    transition: all 0.3s ease;
}
header a:hover {
    color: var(--text-color);
    border-color: var(--link-color);
}

/* Estilos específicos para landing.html */
body.landing-page {
    display: block;
    background-image: url('/static/background.png');
    background-size: cover;
    background-position: right;
    background-attachment: fixed;
    background-repeat: no-repeat;
}
.landing-page .container {
    text-align: center;
}
.landing-page header h1 {
    font-size: clamp(2.5rem, 2.7vw, 3.6rem);
    letter-spacing: -0.04em;
}
.landing-page header p {
    margin: 0 auto 30px auto;
    line-height: 1.6;
}
.login-button {
    margin-top: 1rem;
    border-radius: 12px;
    padding: 12px 24px;
    font-size: 1.1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    font-weight: 500;
    width: 100%;
    max-width: 320px;
}
.login-button.primary {
    background: linear-gradient(135deg, #5b7bea, #48f5ff);
    color: #081021;
}
.login-button.secondary {
    background: var(--secondary-btn-bg);
    color: var(--text-color);
    border-color: var(--glass-border);
    backdrop-filter: blur(5px);
}
.login-button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}
.login-button.primary:hover { color: #081021; }
.login-button.secondary:hover { color: var(--text-color); }
footer {
    margin-top: 40px;
    color: #8899a6;
    font-size: 0.9rem;
}

/* Estilos específicos para index.html */
article {
    padding: 24px;
    background: var(--section-bg);
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}
form label,
form small {
    color: inherit;
}
input,
button,
.button,
[role="button"] {
    border-radius: 12px;
}
input {
    background: var(--input-bg);
    color: var(--text-color);
    border-color: var(--input-border);
}
input::placeholder {
    color: var(--placeholder-color);
}
button.contrast,
a.button {
    background: linear-gradient(135deg, #5b7bea, #48f5ff);
    color: #081021;
    border: none;
}
button.contrast:hover,
a.button:hover {
    opacity: 0.95;
}
.error {
    color: #ff9b9b;
    border-left: 4px solid #ff6b6b;
    padding: 14px 18px;
    background: rgba(255, 107, 107, 0.12);
    border-radius: 12px;
}
.success {
    color: #4ade80;
    border-left: 4px solid #22c55e;
    padding: 14px 18px;
    background: rgba(34, 197, 94, 0.12);
    border-radius: 12px;
}

.info {
    color: #7dd3fc;
    border-left: 4px solid #48f5ff;
    padding: 14px 18px;
    background: rgba(72, 245, 255, 0.12);
    border-radius: 12px;
}

.warning {
    color: #fbbf24;
    border-left: 4px solid #f59e0b;
    padding: 14px 18px;
    background: rgba(245, 158, 11, 0.12);
    border-radius: 12px;
}

.link-row {
    margin-top: 24px;
    display: flex;
    justify-content: center;
}
.link-row a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid var(--link-border);
}
.link-row a:hover {
    color: var(--text-color);
    border-color: var(--link-color);
}
/* Estilos do Loading Overlay */
#loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(9, 16, 30, 0.9);
    backdrop-filter: blur(8px);
    z-index: 1000;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.spinner {
    width: 60px;
    height: 60px;
    border: 5px solid rgba(255, 255, 255, 0.1);
    border-top: 5px solid #48f5ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Estilos específicos para score.html */
section {
    margin-bottom: 24px;
    padding: 24px;
    background: var(--section-bg);
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}
#capture_form p,
#answer-grid p {
    color: inherit;
    line-height: 1.65;
}
#qr-reader {
    width: 100%;
    max-width: 560px;
    margin: 18px auto 0 auto;
    padding: 12px;
    min-height: 320px;
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
#qr-reader video,
#qr-reader canvas {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}
#qr-reader::before {
    content: 'Aqui aparecerá a visualização da câmera ou do QR code capturado';
    color: #a3bffa;
    font-size: 0.95rem;
    text-align: center;
    padding: 8px;
}
#qr-result,
#sheet-result,
#score-result {
    margin-top: 18px;
    color: #eef4ff;
    min-height: 1.6em;
}
#upload_form {
    margin-top: 20px;
    padding: 18px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}
#upload_form h3 {
    margin-top: 0;
    margin-bottom: 14px;
    color: #dbeafe;
}
input[type='file'] {
    display: block;
    width: 100%;
    margin-bottom: 16px;
}
button.contrast {
    background: linear-gradient(135deg, #5b7bea, #48f5ff);
    color: #081021;
    border: none;
    font-weight: 600;
}
button.secondary {
    border-color: rgba(125, 211, 252, 0.35);
    color: var(--secondary-btn-text);
    background: var(--secondary-btn-bg);
}
button.secondary:hover,
button.contrast:hover {
    opacity: 0.96;
}
#reset-qr {
    display: block;
    margin: 0 auto 24px auto;
}
#answer-grid {
    display: none;
}
#student-form {
    display: grid;
    gap: 14px;
}
.question-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 14px 12px;
    background: var(--input-bg);
    border-radius: 18px;
    border: 1px solid var(--glass-border);
}
.question-row label:first-child {
    min-width: 40px;
    font-weight: 700;
    color: var(--text-color);
}
.question-row label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: var(--secondary-btn-bg);
    color: var(--text-color);
}
.question-row input[type='checkbox'] {
    accent-color: #7dd3fc;
}

/* Quando o checkbox marcado for a resposta CORRETA */
.question-row label:has(input.correct-answer:checked) {
    background: rgba(34, 197, 94, 0.15);
    border-color: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.2);
}
.question-row input.correct-answer:checked { accent-color: #22c55e; }

/* Quando o checkbox marcado for uma resposta ERRADA */
.question-row label:has(input.wrong-answer:checked) {
    background: rgba(239, 68, 68, 0.15);
    border-color: #ef4444;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.2);
}
.question-row input.wrong-answer:checked { accent-color: #ef4444; }

/* Responsividade para dispositivos móveis */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }
    .container {
        padding: 20px;
        border-radius: 20px;
    }
    section {
        padding: 16px;
        border-radius: 16px;
    }
    #student-form {
        gap: 10px;
    }
    .question-row {
        gap: 6px;
        padding: 10px 8px;
        border-radius: 12px;
    }
    .question-row label:first-child {
        min-width: 32px;
        font-size: 0.9rem;
    }
    .question-row label {
        padding: 4px 8px;
        border-radius: 10px;
        font-size: 0.85rem;
        gap: 6px;
    }
    .question-row label span {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 16px;
    }
    section {
        padding: 12px;
    }
    .question-row {
        gap: 4px;
        padding: 8px 6px;
    }
    .question-row label:first-child {
        min-width: 28px;
        font-size: 0.85rem;
    }
    .question-row label {
        padding: 3px 6px;
        font-size: 0.8rem;
    }
}

/* Estilos do Pódio de Pontuação */
.podium-score {
    margin: 24px auto;
    padding: 32px;
    background: linear-gradient(145deg, rgba(15, 24, 50, 0.9), rgba(25, 35, 65, 0.9));
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    text-align: center;
    animation: podiumPop 1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    color: #4ade80;
    border-left: 4px solid #22c55e;
    border-right: 4px solid #22c55e;
}
.podium-label {
    font-size: 1rem;
    color: var(--header-p);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 8px;
}
.podium-value {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(90deg, #5b7bea, #48f5ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}
@keyframes podiumPop {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* Ajuste para botões de ação na tabela de provas */
.actions-cell {
    display: flex;
    gap: 8px;
    align-items: center;
}

@media (max-width: 768px) {
    .actions-cell {
        gap: 4px;
        flex-wrap: wrap; /* Permite quebrar linha se necessário em telas muito pequenas */
    }
    .actions-cell a[role="button"] {
        padding: 4px 8px !important; /* Reduz o tamanho do botão no mobile */
    }
}