/* ==========================================================================
   Cardim - Digital Solutions | Estilos principais
   ========================================================================== */

:root {
    /* Cores */
    --color-bg: #0f172a;
    --color-bg-elevated: #1e293b;
    --color-bg-light: #f8fafc;
    --color-text: #f1f5f9;
    --color-text-muted: #94a3b8;
    --color-accent: #38bdf8;
    --color-accent-hover: #7dd3fc;
    --color-border: rgba(148, 163, 184, 0.2);
    --color-white: #ffffff;

    /* Tipografia */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Source Sans 3', sans-serif;

    /* Espaçamento */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Bordas */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transições */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 72rem;
    --container-padding: 1.5rem;
}

/* Reset e base
   ========================================================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-hover);
}

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Skip link (acessibilidade)
   ========================================================================== */

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    z-index: 100;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-accent);
    color: var(--color-bg);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Container
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

/* Header
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-base);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 4rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    color: var(--color-white);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--color-white);
}

.logo__text {
    color: inherit;
}

/* Navegação
   ========================================================================== */

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: var(--color-bg-elevated);
}

.nav-toggle__bar {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: var(--radius-full);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav__link {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.9375rem;
}

.nav__link:hover {
    color: var(--color-text);
}

.nav__link--cta {
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-accent);
    color: var(--color-bg);
    border-radius: var(--radius-md);
}

.nav__link--cta:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg);
}

/* Hero
   ========================================================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-block: 6rem 4rem;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(56, 189, 248, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 0% 80%, rgba(56, 189, 248, 0.06), transparent);
    pointer-events: none;
}

.hero__content {
    position: relative;
    z-index: 1;
}

.hero__title {
    margin: 0 0 var(--space-lg);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(2.5rem, 6vw, 4rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero__brand {
    display: block;
    color: var(--color-white);
}

.hero__tagline {
    display: block;
    color: var(--color-accent);
    font-weight: 600;
    font-size: 0.45em;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-top: 0.2em;
}

.hero__desc {
    margin: 0 0 var(--space-2xl);
    max-width: 32ch;
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.hero__scroll-line {
    width: 1px;
    height: 2.5rem;
    background: linear-gradient(to bottom, var(--color-text-muted), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
    0%, 100% { opacity: 0.5; transform: scaleY(0.8); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Botões
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

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

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

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

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

.btn--secondary:hover {
    border-color: var(--color-text-muted);
    color: var(--color-white);
}

.btn--full {
    width: 100%;
}

/* Secções comuns
   ========================================================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    max-width: 40ch;
    margin-inline: auto;
}

.section-header--light .section-title {
    color: var(--color-bg);
}

.section-header--light .section-desc {
    color: var(--color-text-muted);
}

.section-title {
    margin: 0 0 var(--space-md);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    letter-spacing: -0.02em;
    color: var(--color-white);
}

.section-desc {
    margin: 0;
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

/* Serviços
   ========================================================================== */

.services {
    padding-block: var(--space-4xl);
    background: var(--color-bg-elevated);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-2xl);
    margin-top: var(--space-2xl);
}

.service-card {
    padding: var(--space-2xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: border-color var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
    border-color: rgba(56, 189, 248, 0.3);
    transform: translateY(-4px);
}

.service-card__icon {
    width: 3rem;
    height: 3rem;
    margin-bottom: var(--space-lg);
    color: var(--color-accent);
}

.service-card__title {
    margin: 0 0 var(--space-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-white);
}

.service-card__text {
    margin: 0 0 var(--space-lg);
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.65;
}

.service-card__list {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.service-card__list li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: var(--space-sm);
}

.service-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

/* Sobre
   ========================================================================== */

.about {
    padding-block: var(--space-4xl);
    background: var(--color-bg);
}

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about__content .section-title {
    text-align: left;
    margin-bottom: var(--space-lg);
}

.about__text {
    margin: 0 0 var(--space-md);
    color: var(--color-text-muted);
    max-width: 55ch;
}

.about__values {
    margin: var(--space-xl) 0 0;
    padding: 0;
    list-style: none;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
}

.about__values li {
    margin-bottom: var(--space-sm);
}

.about__values strong {
    color: var(--color-text);
}

.about__visual {
    position: relative;
    aspect-ratio: 1;
    max-width: 400px;
    margin-left: auto;
}

.about__shape {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-bg-elevated) 0%, rgba(56, 189, 248, 0.1) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transform: rotate(3deg);
}

/* Contacto
   ========================================================================== */

.contact {
    padding-block: var(--space-4xl);
    background: var(--color-bg-light);
    color: var(--color-bg);
}

.contact__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    max-width: 52rem;
    margin-inline: auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-bg);
}

.form-group .required {
    color: #dc2626;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--space-md);
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-bg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #94a3b8;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact__info {
    padding: var(--space-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid #e2e8f0;
}

.contact__info-title {
    margin: 0 0 var(--space-md);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-bg);
}

.contact__info p {
    margin: 0 0 var(--space-md);
    font-size: 0.9375rem;
    color: #475569;
}

.contact__info a {
    color: var(--color-accent);
    font-weight: 500;
}

.contact__info a:hover {
    text-decoration: underline;
}

.contact__note {
    margin-top: var(--space-lg) !important;
    font-size: 0.875rem !important;
    color: #64748b !important;
}

/* Footer
   ========================================================================== */

.footer {
    padding-block: var(--space-2xl);
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
}

.footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.footer__brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer__brand .logo__text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-white);
}

.footer__tagline {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.footer__nav ul {
    display: flex;
    gap: var(--space-xl);
    margin: 0;
    padding: 0;
    list-style: none;
}

.footer__nav a {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.footer__nav a:hover {
    color: var(--color-text);
}

.footer__copy {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Responsivo
   ========================================================================== */

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 4rem;
        left: 0;
        right: 0;
        background: var(--color-bg-elevated);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    }

    .nav.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav__link {
        display: block;
        padding: var(--space-md);
        border-radius: var(--radius-md);
    }

    .nav__link--cta {
        text-align: center;
        margin-top: var(--space-sm);
    }

    .about__inner {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .about__visual {
        margin-inline: auto;
        max-width: 280px;
    }

    .about__content .section-title {
        text-align: center;
    }

    .about__text {
        text-align: center;
        margin-inline: auto;
    }

    .about__values {
        text-align: left;
    }

    .contact__wrapper {
        grid-template-columns: 1fr;
    }

    .footer__inner {
        flex-direction: column;
        text-align: center;
    }

    .footer__nav ul {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }

    .hero__actions {
        flex-direction: column;
    }

    .hero__actions .btn {
        width: 100%;
    }

    .services__grid {
        grid-template-columns: 1fr;
    }
}