:root {
    --brand-darkest: #050506;
    --brand-navy: #2c3444;
    --brand-deep: #29445f;
    --brand-muted: #3b4554;
    --brand-sky: #6e9fc0;
    --brand-light: #79aed2;
    --brand-soft: #8c94bc;
    --brand-accent: #8fcaee;
    --brand-pale: #acb4d4;
    --slate-100: #f1f5f9;
    --shadow-glow: 0 10px 40px rgba(143, 202, 238, 0.35);
    --shadow-inner-glow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    --drop-shadow-brand: drop-shadow(0 6px 25px rgba(143, 202, 238, 0.4));
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--brand-darkest);
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--slate-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: opacity 500ms ease;
}

a {
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke;
    transition-duration: 200ms;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.btn,
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 9999px;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary {
    border: none;
    background-color: var(--brand-accent);
    color: var(--brand-darkest);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background-color: var(--brand-light);
}

.btn-primary:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid rgba(143, 202, 238, 0.7);
    color: #ffffff;
}

.btn-secondary:hover {
    background-color: rgba(143, 202, 238, 0.1);
    color: var(--brand-accent);
}

.btn-secondary:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
}

.section-title {
    text-align: center;
    font-size: 1.875rem;
    line-height: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--brand-accent);
}

@media (min-width: 640px) {
    .section-title {
        font-size: 2.25rem;
        line-height: 2.5rem;
    }
}

.text-highlight {
    color: var(--brand-accent);
}

.nav-menu a.active {
    color: var(--brand-accent);
    filter: var(--drop-shadow-brand);
}

@media (min-width: 980px) {
    .nav-menu a.active {
        border-bottom: 1px solid rgba(143, 202, 238, 0.6);
        padding-bottom: 0.25rem;
    }
}

.floating-btn {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    height: 3rem;
    width: 3rem;
    align-items: center;
    justify-content: center;
    background-color: var(--brand-accent);
    color: var(--brand-darkest);
    box-shadow: var(--shadow-glow);
    border-radius: 9999px;
    transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1), background-color 200ms cubic-bezier(0.4, 0, 0.2, 1), filter 200ms cubic-bezier(0.4, 0, 0.2, 1), color 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.floating-btn:hover {
    background-color: var(--brand-light);
    color: var(--brand-darkest);
    filter: var(--drop-shadow-brand);
}

.floating-btn--whatsapp {
    bottom: 6rem;
    right: 1.5rem;
    background-color: #10b981;
    color: #ffffff;
}

.floating-btn--whatsapp:hover {
    background-color: #34d399;
}

.back-to-top {
    display: none;
}

.back-to-top.visible {
    display: flex;
}

.docs-dropdown {
    margin-top: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background-color: rgba(44, 52, 68, 0.9);
    padding: 0.75rem;
    text-align: left;
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    color: var(--slate-100);
    box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
}

@media (min-width: 980px) {
    .docs-dropdown {
        position: absolute;
        left: 0;
        top: 100%;
        margin-top: 0;
        min-width: 15rem;
        transform-origin: top;
        transform: translateY(0.75rem);
        background-color: rgba(44, 52, 68, 0.95);
        padding: 1rem;
        font-size: 0.7rem;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
        opacity: 0;
        pointer-events: none;
        transition-property: opacity, transform;
        transition-duration: 200ms;
        transition-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }

    .docs-menu.is-open > .docs-dropdown,
    .docs-menu:focus-within > .docs-dropdown {
        pointer-events: auto;
        transform: translateY(0);
        opacity: 1;
    }
}

.glass-card,
.backdrop-card {
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    box-shadow: var(--shadow-inner-glow);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.glass-card {
    background-color: rgba(255, 255, 255, 0.05);
}

.backdrop-card {
    background-color: rgba(44, 52, 68, 0.8);
}

.navbar-gradient {
    position: relative;
}

.navbar-gradient::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image: linear-gradient(135deg, #050506, #2c3444);
    transition: background 0.3s ease;
}

.navbar-gradient.fixed {
    position: fixed;
}

.navbar-gradient.navbar-scrolled::before {
    background-image: none;
    background-color: rgba(44, 52, 68, 0.92);
}