@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

:root {
    --bg-color: #eef3f7;
    --bg-card: #fbfdff;
    --text-primary: #22313c;
    --text-secondary: #5c6b78; 
    --accent-color: #0b8fc5;
    --accent-hover: #0878a6;
    --border-color: #d7e2ea;
    --white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(31, 49, 64, 0.05);
    --shadow-md: 0 4px 12px rgba(31, 49, 64, 0.09);
    --shadow-lg: 0 12px 24px rgba(31, 49, 64, 0.13);
    --font-serif: 'Libre Baskerville', serif;
    --font-sans: 'Inter', sans-serif;
    --gradient-dot: rgba(11, 143, 197, 0.08);
}

[data-theme="dark"] {
    --bg-color: #101820;
    --bg-card: #172431;
    --text-primary: #e8eef3;
    --text-secondary: #aebbc6; 
    --accent-color: #0b8fc5;
    --accent-hover: #36aede;
    --border-color: #2b4050;
    --white: #f8fbff;
    --input-bg: #121d27;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.42);
    --font-serif: 'Libre Baskerville', serif;
    --font-sans: 'Inter', sans-serif;
    --gradient-dot: rgba(11, 143, 197, 0.1);
}

[data-theme="dark-soft"] {
    --bg-color: #263640;
    --bg-card: #30434f;
    --text-primary: #f0f5f8;
    --text-secondary: #c7d2da; 
    --accent-color: #36aede;
    --accent-hover: #63c5ec;
    --border-color: #465d6b;
    --white: #f8fbff;
    --input-bg: #354a56;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.14);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.28);
    --font-serif: 'Libre Baskerville', serif;
    --font-sans: 'Inter', sans-serif;
    --gradient-dot: rgba(11, 143, 197, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    background-image: radial-gradient(var(--gradient-dot) 1px, transparent 1px);
    background-size: 20px 20px;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, .brand-font {
    font-family: var(--font-serif);
    color: var(--text-primary);
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Auth / Login Page */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
}

.auth-card {
    background: var(--bg-card);
    padding: 3rem 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
    text-align: center;
    border-top: 4px solid var(--accent-color);
    position: relative;
}

.institution-name {
    max-width: 340px;
    margin-bottom: 0.75rem;
    margin-right: auto;
    margin-left: auto;
    font-size: 1.75rem;
    line-height: 1.2;
}

.institution-name span {
    display: block;
}

.auth-subtitle {
    margin: 0 0 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Enquadramento do Logótipo RESOLVIDO */
.logo-img {
    width: auto; /* Ajusta à largura original/necessária */
    height: 120px; /* Mantém uma altura consistente */
    max-width: 100%; /* Não deixa transbordar em telemóveis */
    object-fit: contain;
    border-radius: 12px; /* Cantos curvos suaves e elegantes em vez de um círculo perfeito */
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 3px solid var(--border-color); /* Moldura fina */
    background-color: var(--white);
    padding: 8px; /* Pequena margem interna para parecer um quadro */
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: var(--input-bg, var(--white));
    color: var(--text-primary);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(11, 143, 197, 0.13);
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--white);
    padding: 0.85rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    width: 100%;
    text-align: center;
    letter-spacing: 0.5px;
}

.btn:hover {
    background-color: var(--accent-hover);
}

/* Alertas */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left: 4px solid #dc2626;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left: 4px solid #16a34a;
}

/* Navbar */
.navbar {
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
    max-width: 800px;
}

.navbar-brand {
    color: var(--accent-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-brand-name {
    display: grid;
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.12;
}

.navbar-brand-name small {
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.68rem;
    font-weight: 600;
}

.navbar-brand img {
    height: 55px; /* Aumentado para melhor visibilidade em ecrãs grandes */
    width: auto;
    object-fit: contain;
    border-radius: 8px; /* Cantos um pouco mais suaves */
    border: 2px solid var(--border-color);
    background-color: var(--white);
    padding: 3px;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    margin-left: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s, transform 0.3s;
    margin-left: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--accent-color);
    transform: rotate(15deg);
}

@media (max-width: 680px) {
    .auth-wrapper {
        padding: 1rem;
    }

    .auth-card {
        padding: 2.5rem 1.25rem;
    }

    .institution-name {
        font-size: 1.4rem;
    }

    .navbar {
        padding: 0.7rem 0;
    }

    .navbar .container {
        align-items: flex-start;
        gap: 0.75rem;
    }

    .navbar-brand {
        gap: 8px;
    }

    .navbar-brand img {
        height: 44px;
    }

    .navbar-brand-name {
        max-width: 120px;
        font-size: 0.82rem;
    }

    .nav-links {
        justify-content: flex-end;
        flex-wrap: wrap;
        gap: 0.35rem 0.75rem;
    }

    .nav-links a,
    .theme-toggle {
        margin-left: 0;
    }
}

/* Feed */
.create-post {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2.5rem;
    border: 1px solid var(--border-color);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    line-height: 1.7;
    background-color: transparent;
    border: none;
    border-bottom: 2px solid var(--border-color);
    border-radius: 0;
    padding: 1rem 0;
}

textarea.form-control:focus {
    box-shadow: none;
    border-bottom-color: var(--accent-color);
}

.post-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    position: relative;
}

/* Detalhe de "página de livro" */
.post-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--accent-color);
    border-top-left-radius: 8px;
    border-bottom-left-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s;
}

.post-card:hover::before {
    opacity: 1;
}

.post-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed var(--border-color);
}

.post-author {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    font-family: var(--font-serif);
}

.post-date {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.post-content {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 2rem;
    white-space: pre-wrap;
}

/* Comentários */
.comments-section {
    background-color: rgba(0,0,0,0.02);
    border-radius: 6px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.comment {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
}

.comment-text {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.comment-form {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.comment-form .btn {
    width: auto;
    padding: 0.5rem 1.5rem;
}