/* Layout Styles */

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-header);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    will-change: transform;
}

.header--hidden {
    transform: translateY(-100%);
}

.header--shadow {
    box-shadow: var(--shadow-md);
}

.header__container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.header__logo {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    justify-self: start;
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header__logo:hover {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation - MOBILE FIRST */
.nav {
    display: none; /* Escondida por defeito (mobile) */
    align-items: center;
    justify-self: center;
    gap: var(--space-xl);
}

.nav__list {
    display: flex;
    gap: var(--space-xl);
}

.nav__link {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    position: relative;
    transition: color var(--transition-fast);
}

.nav__link:hover {
    color: var(--primary-600);
}

.nav__link--active {
    color: var(--primary-600);
}

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-600);
}

/* Header Controls */
.header__controls {
    display: flex;
    align-items: center;
    justify-self: end;
    gap: var(--space-md);
}

.header__button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.header__button:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Progress Bar - Now independent from header */
.progress-bar {
    position: fixed;
    top: var(--header-height); /* Below header by default */
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-400), var(--primary-600));
    transition: width var(--transition-base), top var(--transition-base);
    z-index: calc(var(--z-header) - 1); /* Just below header */
}

/* When header is hidden, progress bar moves to top */
.progress-bar--top {
    top: 0;
}

/* Mobile Menu Toggle - MOBILE FIRST */
.mobile-menu-toggle {
    display: flex; /* Visível por defeito (mobile) */
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.mobile-menu-toggle__icon {
    position: relative;
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.mobile-menu-toggle__icon::before,
.mobile-menu-toggle__icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast);
}

.mobile-menu-toggle__icon::before {
    top: -8px;
}

.mobile-menu-toggle__icon::after {
    bottom: -8px;
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon {
    background: transparent;
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-toggle--active .mobile-menu-toggle__icon::after {
    bottom: 0;
    transform: rotate(-45deg);
}

/* Mobile Navigation - MOBILE FIRST */
.nav--mobile {
    display: block; /* Disponível por defeito (mobile) */
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-lg) 0;
    transform: translateY(-100%);
    visibility: hidden; /* Esconder completamente quando não ativo */
    opacity: 0;
    transition: transform var(--transition-base), visibility 0s var(--transition-base), opacity var(--transition-base);
    z-index: calc(var(--z-header) - 1);
    pointer-events: none; /* Don't intercept clicks when hidden */
}

.nav--mobile.active {
    transform: translateY(0);
    visibility: visible; /* Mostrar quando ativo */
    opacity: 1;
    transition: transform var(--transition-base), visibility 0s 0s, opacity var(--transition-base);
    pointer-events: auto; /* Allow clicks when visible */
}

.nav--mobile .nav__list {
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: auto;
}

.footer__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

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

.footer__logo {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
}

.footer__tagline {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer__section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer__title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--primary-600);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-600);
    color: white;
    transform: translateY(-2px);
}

/* Footer Bottom */
.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* Main Content Spacing */
main {
    padding-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* Responsive Layout - MOBILE FIRST APPROACH */

/* DESKTOP: A partir de 1024px mostrar nav desktop e esconder hamburger */
@media (min-width: 1024px) {
    .header__container {
        grid-template-columns: 1fr auto 1fr; /* Centrar nav no desktop */
    }

    .nav {
        display: flex; /* Mostrar nav horizontal no desktop */
    }

    .mobile-menu-toggle {
        display: none; /* Esconder hamburger no desktop */
    }

    .nav--mobile {
        display: none; /* Desativar completamente no desktop */
    }
}

/* TABLET & MOBILE: Até 1024px manter comportamento mobile */
@media (max-width: 1024px) {
    /* Nav desktop escondida, hamburger visível - já definido por defeito */

    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .footer__brand {
        text-align: center;
        align-items: center;
    }

    .footer__section {
        text-align: center;
        align-items: center;
    }

    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header__controls {
        gap: var(--space-sm);
    }

    .header__button {
        width: 36px;
        height: 36px;
    }
}