/* =============================================================
   YaadHai — Sticky Navbar, Floating WhatsApp Button
   Responsive: 1100 / 900 / 480 px breakpoints
   Dark-mode support via prefers-color-scheme
   ============================================================= */

/* ── Variables ──────────────────────────────────────────────── */
:root {
    --nav-h: 64px;
    --nav-bg: rgba(255, 255, 255, 0.97);
    --nav-border: rgba(0, 0, 0, 0.06);
    --nav-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
    --nav-shadow-scroll: 0 2px 20px rgba(0, 0, 0, 0.1);
    --nav-link: #4B5563;
    --nav-link-hover: #25D366;
    --nav-link-hover-bg: rgba(37, 211, 102, 0.08);
    --nav-link-active: #25D366;
    --nav-link-active-bg: rgba(37, 211, 102, 0.10);
    --nav-toggle-color: #374151;
    --wa-green: #25D366;
    --wa-green-dark: #1db954;
    --wa-shadow: rgba(37, 211, 102, 0.35);
}

/* ── Sticky Navbar shell ────────────────────────────────────── */
.main-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--nav-border);
    box-shadow: var(--nav-shadow);
    transition: box-shadow 0.2s ease;
}
.main-navbar.is-scrolled {
    box-shadow: var(--nav-shadow-scroll);
}

/* ── Inner layout ───────────────────────────────────────────── */
.navbar-inner {
    display: flex;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: var(--nav-h);
    gap: 0.75rem;
    position: relative;
}

/* ── Logo ───────────────────────────────────────────────────── */
.navbar-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    text-decoration: none;
}
.navbar-logo img {
    height: 34px;
    width: auto;
    display: block;
}

/* ── Primary Nav Menu ───────────────────────────────────────── */
.navbar-menu {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0 auto;
    padding: 0;
    gap: 0.125rem;
}
.navbar-menu li {
    margin: 0;
    padding: 0;
}
.navbar-menu a {
    display: block;
    color: var(--nav-link);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.4375rem 0.75rem;
    border-radius: 0.4375rem;
    transition: color 0.15s ease, background-color 0.15s ease;
    white-space: nowrap;
    line-height: 1.4;
}
.navbar-menu a:hover {
    color: var(--nav-link-hover);
    background-color: var(--nav-link-hover-bg);
}
.navbar-menu a.is-active {
    color: var(--nav-link-active);
    font-weight: 600;
    background-color: var(--nav-link-active-bg);
}

/* ── Right Cluster ──────────────────────────────────────────── */
.navbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* ── Language Switcher ──────────────────────────────────────── */
.navbar-langs {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    font-size: 0.8125rem;
}
.navbar-langs .lang-sep {
    color: #D1D5DB;
    user-select: none;
    font-size: 0.75rem;
    padding: 0 0.1rem;
}
.navbar-langs a.lang-link,
.navbar-langs span.lang-link {
    color: #6B7280;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem 0.4rem;
    border-radius: 0.3125rem;
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.4;
    text-decoration: none;
    transition: color 0.15s ease, background-color 0.15s ease;
}
.navbar-langs a.lang-link:hover {
    color: #111827;
    background-color: #F3F4F6;
}
.navbar-langs span.lang-link.active,
.navbar-langs a.lang-link.active {
    color: var(--wa-green);
    font-weight: 600;
}

/* ── QR Button ──────────────────────────────────────────────── */
.navbar-qr-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    background: none;
    border: 1.5px solid #E5E7EB;
    border-radius: 0.5rem;
    color: #374151;
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    line-height: 1;
    transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
    font-family: inherit;
    white-space: nowrap;
}
.navbar-qr-btn:hover {
    border-color: var(--wa-green);
    color: var(--wa-green);
    background-color: rgba(37, 211, 102, 0.06);
}
.navbar-qr-btn svg { flex-shrink: 0; }

/* ── Start on WhatsApp CTA ──────────────────────────────────── */
.navbar-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--wa-green);
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
    white-space: nowrap;
    line-height: 1;
    font-family: inherit;
}
.navbar-cta:hover {
    background: var(--wa-green-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--wa-shadow);
}
.navbar-cta svg { flex-shrink: 0; }

/* ── Mobile Hamburger ───────────────────────────────────────── */
.navbar-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--nav-toggle-color);
    border-radius: 0.375rem;
    transition: background-color 0.15s ease;
    flex-shrink: 0;
}
.navbar-toggle:hover { background-color: #F3F4F6; }
.navbar-toggle .icon-open  { display: block; }
.navbar-toggle .icon-close { display: none; }
.navbar-toggle.is-open .icon-open  { display: none; }
.navbar-toggle.is-open .icon-close { display: block; }

/* =============================================================
   Floating WhatsApp Button (mobile only)
   ============================================================= */
.floating-wa {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 900;
    display: none; /* shown via media query below */
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--wa-green);
    color: #fff;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.45);
    text-decoration: none;
    transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.floating-wa:hover {
    background: var(--wa-green-dark);
    transform: scale(1.08);
    box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
}

/* =============================================================
   Responsive Breakpoints
   ============================================================= */

/* 1100px — tablet: hide verbose labels */
@media (max-width: 1100px) {
    .navbar-qr-btn .qr-label { display: none; }
    .navbar-menu a {
        font-size: 0.8125rem;
        padding: 0.4rem 0.625rem;
    }
}

/* 900px — mobile: hamburger menu */
@media (max-width: 900px) {
    .navbar-inner {
        height: 60px;
        padding: 0 1rem;
    }

    /* Collapsed by default — shown when .is-open */
    .navbar-menu {
        display: none;
        flex-direction: column;
        align-items: stretch;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #fff;
        border-top: 1px solid #F3F4F6;
        box-shadow: 0 8px 28px rgba(0, 0, 0, 0.12);
        padding: 0.75rem;
        gap: 0.125rem;
        z-index: 998;
        margin: 0;
    }
    .navbar-menu.is-open {
        display: flex;
    }
    .navbar-menu a {
        text-align: left;
        padding: 0.75rem 1rem;
        border-radius: 0.5rem;
        font-size: 0.9375rem;
    }

    .navbar-toggle { display: flex; }
    .navbar-right  { gap: 0.375rem; }

    .navbar-langs .lang-sep {
        display: none;
    }
    .navbar-langs a.lang-link,
    .navbar-langs span.lang-link {
        padding: 0.25rem 0.3rem;
        font-size: 0.75rem;
    }

    .navbar-cta { padding: 0.4375rem 0.75rem; font-size: 0.8125rem; }
    .navbar-cta .cta-text { display: none; }

    /* Show floating button on mobile */
    .floating-wa { display: flex; }
}

/* 480px — extra small */
@media (max-width: 480px) {
    .navbar-langs { gap: 0; }
    .navbar-qr-btn { display: none; }
    .navbar-cta {
        padding: 0.4375rem 0.625rem;
    }
    .floating-wa {
        width: 52px;
        height: 52px;
        bottom: 1.25rem;
        right: 1.25rem;
    }
}

/* =============================================================
   Dark Mode
   ============================================================= */
@media (prefers-color-scheme: dark) {
    .main-navbar {
        --nav-bg: rgba(17, 24, 39, 0.97);
        --nav-border: rgba(255, 255, 255, 0.07);
        --nav-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
        background: var(--nav-bg);
        border-bottom-color: var(--nav-border);
    }
    .navbar-menu a {
        color: #D1D5DB;
    }
    .navbar-menu a:hover {
        color: var(--wa-green);
        background-color: rgba(37, 211, 102, 0.1);
    }
    .navbar-menu.is-open {
        background: #111827;
        border-top-color: #374151;
    }
    .navbar-toggle {
        color: #D1D5DB;
    }
    .navbar-toggle:hover { background-color: #1F2937; }
    .navbar-qr-btn {
        color: #D1D5DB;
        border-color: #374151;
    }
    .navbar-qr-btn:hover {
        color: var(--wa-green);
        border-color: var(--wa-green);
        background-color: rgba(37, 211, 102, 0.1);
    }
    .navbar-langs a.lang-link,
    .navbar-langs span.lang-link {
        color: #9CA3AF;
    }
    .navbar-langs a.lang-link:hover {
        color: #F9FAFB;
        background-color: #1F2937;
    }
    .navbar-langs .lang-sep {
        color: #4B5563;
    }
}

/* ── Body padding for fixed navbar ────────────────────────────── */
body {
    padding-top: var(--nav-h);
}