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

:root {
    /* tema dark (padrao) */
    --bg-primary: #0a0e27;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --bg-card: #151b35;
    --border-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --blue: #3b82f6;
    --purple: #8b5cf6;
    --green: #10b981;
    --red: #ef4444;
    --yellow: #f59e0b;
    --gradient: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
}

/* tema light */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {max-width: 1280px; margin: 0 auto; padding: 0 2rem;}

.page-content {
    padding-top: clamp(7.25rem, 11vw, 9rem);
}

@media (max-width: 768px) {
    .page-content {
        padding-top: 6.75rem;
    }
}

/* navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 1.5rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.brand-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


.nav-menu {
    grid-column: 2;
    justify-self: center;
    display: flex;
    gap: 0.75rem;
    list-style: none;
    padding: 0.25rem 0.5rem;
    background: rgba(20, 26, 55, 0.55);
    backdrop-filter: blur(10px);
    border-radius: 999px;
    border: 1px solid rgba(59, 130, 246, 0.12);
    align-items: center;
    flex-wrap: nowrap;
    max-width: calc(100vw - 600px);
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-menu li {
    display: flex;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.925rem;
    transition: all 0.25s ease;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    line-height: 1.1;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.18);
    box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.3);
}

.nav-actions {
    grid-column: 3;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
    position: relative;
}

.accessibility-menu {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.accessibility-toggle {
    background: rgba(17, 24, 39, 0.7);
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: 0 10px 25px rgba(10, 14, 39, 0.25);
    color: var(--text-secondary);
    padding: 0.35rem 0.6rem;
    transition: all 0.2s;
}

.accessibility-toggle:hover,
.accessibility-menu.open .accessibility-toggle {
    background: rgba(59, 130, 246, 0.22);
    color: var(--blue);
    border-color: rgba(59, 130, 246, 0.4);
}

.accessibility-toggle svg {
    width: 20px;
    height: 20px;
}

/* controles de acessibilidade (popover) */
.accessibility-controls {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.85rem;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 1rem;
    position: absolute;
    right: 0;
    top: calc(100% + 0.75rem);
    min-width: 220px;
    box-shadow: 0 18px 45px rgba(8, 11, 30, 0.38);
    z-index: 1002;
    backdrop-filter: blur(16px);
}

.accessibility-controls::before {
    content: '';
    position: absolute;
    top: -10px;
    right: 1.75rem;
    width: 18px;
    height: 18px;
    background: rgba(15, 23, 42, 0.96);
    border-left: 1px solid rgba(148, 163, 184, 0.3);
    border-top: 1px solid rgba(148, 163, 184, 0.3);
    transform: rotate(45deg);
    z-index: 0;
}

.accessibility-menu.open .accessibility-controls {
    display: flex;
}

/* botao hamburger mobile */
.nav-burger {
    display: none;
    flex-direction: column;
    gap: 0.35rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.nav-burger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.nav-burger.active span:nth-child(1) {transform: rotate(45deg) translate(6px, 6px);}
.nav-burger.active span:nth-child(2) {opacity: 0;}
.nav-burger.active span:nth-child(3) {transform: rotate(-45deg) translate(6px, -6px);}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.35rem;
    border-radius: 999px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.btn-icon:hover {
    background: rgba(59, 130, 246, 0.16);
    color: var(--text-primary);
}

.btn-icon.active {
    background: rgba(59, 130, 246, 0.22);
    color: var(--blue);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.theme-selector, .font-controls {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    background: rgba(17, 24, 39, 0.7);
    padding: 0.25rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: 0 10px 25px rgba(10, 14, 39, 0.25);
}

.font-size-display {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    padding: 0 0.5rem;
    display: flex;
    align-items: center;
    min-width: 40px;
    justify-content: center;
}

/* buttons */
.btn-primary, .btn-secondary, .btn-outline, .btn-large {
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {background: var(--bg-tertiary);}

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

.btn-outline:hover {
    border-color: var(--blue);
    background: rgba(59, 130, 246, 0.1);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: 6rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.footer-column ul {list-style: none;}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.75rem;
    transition: color 0.3s;
}

.footer-column a:hover {color: var(--text-primary);}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-social {display: flex; gap: 1rem;}

.footer-social a {
    color: var(--text-secondary);
    transition: color 0.3s;
}

.footer-social a:hover {color: var(--blue);}

/* tooltip de glossario */
.glossary-term {
    font-weight: 700;
    color: var(--blue);
    cursor: help;
    position: relative;
    border-bottom: 1px dashed var(--blue);
    transition: all 0.2s;
}

.glossary-term:hover {
    color: var(--purple);
    border-bottom-color: var(--purple);
}

.glossary-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(0, 0, 0, 0.95);
    color: white;
    font-size: 0.8125rem;
    line-height: 1.5;
    border-radius: 0.5rem;
    max-width: 300px;
    min-width: 200px;
    width: max-content;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    pointer-events: none;
    font-weight: 400;
}

.glossary-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.95);
}

/* responsividade mobile */
@media (max-width: 1024px) {
    .navbar .container {
        grid-template-columns: auto auto;
        grid-template-rows: auto auto;
        gap: 1rem;
    }

    .nav-menu {
        grid-column: 1 / -1;
        justify-self: flex-start;
        order: 3;
    }

    .nav-actions {
        grid-column: 2;
        grid-row: 1;
        flex-direction: row;
        align-items: center;
        gap: 0.5rem;
    }
}

@media (max-width: 768px) {
    .container {padding: 0 1rem;}

    /* menu mobile */
    .nav-burger {display: flex;}

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        gap: 0;
        padding: 5rem 0 2rem;
        border-left: 1px solid var(--border-color);
        transition: right 0.3s ease;
        overflow-y: auto;
        border-radius: 0;
        box-shadow: none;
        backdrop-filter: none;
        border: none;
    }

    .nav-menu.active {right: 0;}

    .nav-menu li {
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu a {
        display: block;
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    /* controles de acessibilidade em mobile */
    .nav-actions {
        grid-column: 2;
        grid-row: 1;
        justify-content: flex-end;
    }

    .accessibility-controls {
        flex-wrap: wrap;
        gap: 0.5rem;
        padding-top: 0;
    }

    .theme-selector, .font-controls {
        flex: 1;
        min-width: 120px;
    }

    /* esconde textos de tema em telas pequenas */
    .theme-selector .btn-icon span:not([data-fontsize-display]) {
        display: none;
    }

    body.nav-open {overflow: hidden;}

    .footer-content {grid-template-columns: 1fr; gap: 2rem;}
    .footer-bottom {flex-direction: column; gap: 1rem; text-align: center;}

    .glossary-tooltip {
        position: fixed;
        left: 1rem !important;
        right: 1rem !important;
        bottom: 1rem !important;
        top: auto !important;
        transform: none !important;
        max-width: none;
        width: auto;
    }

    .glossary-tooltip::after {display: none;}
}

/* desktop medio - ajuste do menu */
@media (max-width: 1280px) and (min-width: 1025px) {
    .nav-menu {
        gap: 0.5rem;
        max-width: calc(100vw - 500px);
    }

    .nav-menu a {
        font-size: 0.875rem;
        padding: 0.45rem 0.85rem;
    }
}

/* tablet */
@media (max-width: 1024px) and (min-width: 769px) {
    .nav-menu {
        gap: 0.5rem;
        font-size: 0.875rem;
        max-width: 100%;
    }

    .nav-menu a {
        padding: 0.45rem 0.85rem;
    }
}

/* transicao suave de temas */
html {
    transition: background-color 0.3s ease;
}

body {
    transition: background-color 0.3s ease, color 0.3s ease;
}