/* ========================================
   NAVBAR
======================================== */

#navbar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;

    width: 100%;

    background: rgba(var(--surface-rgb), 0.35);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    border-bottom: 1px solid rgba(var(--primary-rgb), 0.12);

    font-family: var(--font-body);

    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

/* Applied by navbar.js once the page is scrolled */
#navbar.scrolled,
body.menu-open #navbar {
    background: rgba(var(--surface-rgb), 0.88);
    border-bottom-color: rgba(var(--primary-rgb), 0.22);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.navbar-container {
    width: min(100% - 2 * var(--gutter), var(--container-width));
    height: var(--nav-height);

    margin: 0 auto;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

/* ========================================
   BRAND
======================================== */

.navbar-brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-strong);
}

.brand-name span {
    color: var(--primary);
}

.brand-caption {
    white-space: nowrap;
    font-family: var(--font-tech);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

/* ========================================
   NAVIGATION LINKS
======================================== */

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    margin-left: auto;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    position: relative;
    display: inline-block;
    padding: 0.5rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.active::after {
    transform: scaleX(1);
}

/* ========================================
   CONTACT BUTTON
======================================== */

.navbar-contact {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.1rem;
    border: 1px solid var(--primary);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.navbar-contact span {
    font-size: 1rem;
    transition: transform var(--transition-fast);
}

.navbar-contact:hover,
.navbar-contact.active {
    background: var(--primary-fill);
    color: var(--on-accent);
    box-shadow: 0 0 20px var(--cyan-glow);
}

.navbar-contact:hover span {
    transform: translate(3px, -3px);
}

/* ========================================
   NAV TOOLS: LANGUAGE SWITCH (ES | EN) + THEME TOGGLE
======================================== */

.navbar-tools {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.theme-toggle {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: rgba(var(--primary-rgb), 0.06);
    color: var(--primary);
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast);
}

.theme-toggle:hover {
    background: rgba(var(--primary-rgb), 0.14);
    border-color: var(--primary);
}

.theme-toggle svg {
    position: absolute;
    width: 18px;
    height: 18px;
    transition:
        opacity var(--transition-fast),
        transform var(--transition-fast);
}

/* The icon shows the active theme: moon = dark, sun = light */
.theme-toggle .icon-sun,
:root[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.6);
}

:root[data-theme="light"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: none;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    flex-shrink: 0;
    font-family: var(--font-tech);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.lang-switch > span {
    color: var(--line-muted);
}

.lang-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    min-height: 32px;
    padding: 0 0.3rem;
    color: var(--text-subtle);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition:
        color var(--transition-fast),
        border-color var(--transition-fast);
}

.lang-link:hover,
.lang-link:focus-visible {
    color: var(--text-strong);
}

.lang-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ========================================
   MOBILE TOGGLE
======================================== */

.navbar-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: transparent;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 6px;
}

.navbar-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--primary);
    transition: transform var(--transition-fast);
}

/* ========================================
   RESPONSIVE
======================================== */

/* Small desktops / landscape tablets: tighter spacing so the
   (longer) Spanish labels fit next to the brand and ES|EN */
@media (min-width: 851px) and (max-width: 1100px) {
    .navbar-container {
        gap: 1.25rem;
    }

    .navbar-menu {
        gap: 1.5rem;
    }

    .navbar-links {
        gap: 1.25rem;
    }
}

@media (max-width: 850px) {
    .navbar-container {
        gap: 0.5rem;
    }

    .navbar-brand {
        min-width: 0;
        flex-shrink: 1;
        margin-right: auto;
    }

    /* Visually: brand · ES|EN · theme · menu toggle
       (the menu panel itself is absolutely positioned) */
    .navbar-tools {
        order: 1;
        gap: 0.35rem;
    }

    .navbar-toggle {
        display: flex;
        order: 2;
        z-index: 1002;
    }

    .lang-link {
        min-width: 40px;
        min-height: 44px;
    }

    .navbar-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        max-height: calc(100vh - var(--nav-height));
        max-height: calc(100dvh - var(--nav-height));
        overflow-y: auto;
        padding: 1rem var(--gutter) 1.5rem;
        background: rgba(var(--surface-rgb), 0.98);
        border-bottom: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;

        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition:
            opacity var(--transition-fast),
            transform var(--transition-fast),
            visibility var(--transition-fast);
    }

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

    .navbar-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }

    .nav-link {
        display: block;
        padding: 0.8rem 0;
        font-size: 0.95rem;
    }

    .nav-link::after {
        width: 32px;
    }

    .navbar-contact {
        justify-content: center;
        min-height: 48px;
    }

    /* Hamburger animation: two bars cross into an X */
    .navbar-toggle.open span:first-child {
        transform: translateY(4px) rotate(45deg);
    }

    .navbar-toggle.open span:last-child {
        transform: translateY(-4px) rotate(-45deg);
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: 1.1rem;
    }
}

/* Small phones: brand + ES|EN + toggle must fit in 288px */
@media (max-width: 400px) {
    .navbar-container {
        gap: 0.25rem;
    }

    .brand-name {
        font-size: 1rem;
        letter-spacing: 0.06em;
    }

    .brand-caption {
        font-size: 0.6rem;
        letter-spacing: 0.08em;
    }

    .brand-name {
        font-size: 0.92rem;
        letter-spacing: 0.05em;
    }

    .navbar-tools {
        gap: 0.15rem;
    }

    .lang-switch {
        gap: 0;
        font-size: 0.88rem;
    }

    .lang-link {
        min-width: 30px;
        padding: 0 0.1rem;
    }

    .theme-toggle {
        width: 34px;
        height: 34px;
    }

    .navbar-toggle {
        width: 38px;
        padding: 8px;
    }
}