/* ============================================
   E-Kendra — Shared CSS
   (Navbar + Mobile menu + Footer + WhatsApp + Scroll top)
   ============================================ */

:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --primary-glow: rgba(79, 70, 229, 0.15);
    --primary-glow-strong: rgba(79, 70, 229, 0.35);
    --secondary: #7C3AED;
    --secondary-glow: rgba(124, 58, 237, 0.15);
    --success: #10B981;
    --danger: #EF4444;
    --warning: #F59E0B;
    --info: #3B82F6;
    --bg-body: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-hover: #F1F5F9;
    --bg-dark: #0F172A;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-light: #F1F5F9;
    --border-color: #E2E8F0;
    --border-light: #F1F5F9;
    --radius: 20px;
    --radius-sm: 10px;
    --radius-lg: 28px;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
    --shadow-xl: 0 30px 80px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --nav-height: 72px;
    --max-width: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    overflow-x: hidden;
    padding-top: var(--nav-height);
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* ===== NAVBAR ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px; height: var(--nav-height);
    display: flex; align-items: center; justify-content: space-between;
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow); }
.navbar .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.navbar .brand .logo-img { height: 40px; width: auto; max-width: 160px; object-fit: contain; }
.navbar .brand .logo-icon {
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 800; color: #fff; flex-shrink: 0;
}
.navbar .brand .logo-text {
    font-size: 22px; font-weight: 800; color: var(--text-primary);
    letter-spacing: -0.5px;
}
.navbar .nav-links { display: flex; align-items: center; gap: 4px; }
.navbar .nav-links > a {
    color: var(--text-secondary); font-weight: 500; font-size: 14px;
    padding: 8px 16px; border-radius: var(--radius-sm);
    transition: var(--transition);
}
.navbar .nav-links > a:hover,
.navbar .nav-links > a.active {
    color: var(--primary); background: var(--primary-glow);
}
.navbar .nav-actions { display: flex; align-items: center; gap: 10px; }
.navbar .nav-actions .btn-login {
    padding: 8px 20px; border: 1px solid var(--border-color);
    border-radius: 50px; color: var(--text-secondary);
    font-weight: 600; font-size: 14px;
    transition: var(--transition); background: transparent;
}
.navbar .nav-actions .btn-login:hover {
    border-color: var(--primary); color: var(--primary);
    background: var(--primary-glow);
}
.navbar .nav-actions .btn-register {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50px; color: #fff; font-weight: 600; font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 4px 16px var(--primary-glow);
}
.navbar .nav-actions .btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--primary-glow-strong);
}
.hamburger {
    display: none; background: none; border: none;
    font-size: 22px; cursor: pointer; padding: 8px;
    color: var(--text-primary);
}

/* ===== NAV DROPDOWN (desktop) ===== */
.navbar .nav-links .nav-dropdown {
    position: relative;
}
.navbar .nav-links .nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.navbar .nav-links .nav-dropdown-toggle i {
    font-size: 9px;
    transition: transform 0.3s ease;
    opacity: 0.7;
}
.navbar .nav-links .nav-dropdown:hover .nav-dropdown-toggle,
.navbar .nav-links .nav-dropdown-toggle.active {
    color: var(--primary);
    background: var(--primary-glow);
}
.navbar .nav-links .nav-dropdown:hover .nav-dropdown-toggle i {
    transform: rotate(180deg);
}
.navbar .nav-links .nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    min-width: 210px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    z-index: 1100;
}
.navbar .nav-links .nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.navbar .nav-links .nav-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13.5px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}
.navbar .nav-links .nav-dropdown-menu a i {
    width: 18px;
    text-align: center;
    color: var(--primary);
    font-size: 13px;
}
.navbar .nav-links .nav-dropdown-menu a:hover {
    background: var(--primary-glow);
    color: var(--primary);
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
    display: none; position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 24px; box-shadow: var(--shadow-lg);
    z-index: 999; transform: translateY(-10px);
    opacity: 0; visibility: hidden; transition: var(--transition);
}
.mobile-menu.open {
    transform: translateY(0); opacity: 1; visibility: visible;
}
.mobile-menu > a {
    display: block; padding: 12px 16px;
    color: var(--text-secondary); font-weight: 500;
    border-radius: var(--radius-sm); transition: var(--transition);
}
.mobile-menu > a:hover { background: var(--bg-hover); color: var(--primary); }
.mobile-menu .divider { border-top: 1px solid var(--border-color); margin: 8px 0; }
.mobile-menu .mobile-actions { display: flex; gap: 12px; padding: 12px 16px; }
.mobile-menu .mobile-actions a {
    flex: 1; text-align: center; padding: 12px;
    border-radius: var(--radius-sm); font-weight: 600;
}
.mobile-menu .mobile-actions .btn-login {
    border: 1px solid var(--border-color); color: var(--text-secondary);
}
.mobile-menu .mobile-actions .btn-register {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
}

/* ===== MOBILE SUBMENU ===== */
.mobile-sub-toggle {
    width: 100%;
    background: transparent;
    border: none;
    text-align: left;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}
.mobile-sub-toggle:hover {
    background: var(--bg-hover);
    color: var(--primary);
}
.mobile-sub-toggle i {
    font-size: 10px;
    transition: transform 0.3s ease;
    opacity: 0.7;
}
.mobile-sub-toggle.open i {
    transform: rotate(180deg);
}
.mobile-submenu {
    display: none;
    padding: 4px 0 4px 12px;
    margin-bottom: 4px;
    border-left: 2px solid var(--primary-glow);
    margin-left: 16px;
}
.mobile-submenu.open {
    display: block;
    animation: fadeInMenu 0.25s ease;
}
.mobile-submenu a {
    padding: 10px 14px;
    font-size: 13.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.mobile-submenu a i {
    color: var(--primary);
    font-size: 12px;
    width: 16px;
    text-align: center;
}
@keyframes fadeInMenu {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-dark); color: var(--text-light);
    padding: 50px 0 24px; margin-top: 30px;
    border-top: 1px solid var(--border-color);
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 36px; margin-bottom: 32px;
}
.footer-brand .logo-text {
    font-size: 22px; font-weight: 800; color: #fff;
    margin-bottom: 8px; display: block;
}
.footer-brand p {
    color: var(--text-muted); font-size: 14px;
    line-height: 1.7; max-width: 320px;
}
.footer-contact { margin-top: 12px; font-size: 14px; color: var(--text-muted); }
.footer-contact div { margin-bottom: 4px; }
.footer-contact i { color: var(--primary-light); width: 20px; }
.footer h4 {
    font-size: 15px; font-weight: 700;
    margin-bottom: 14px; color: #fff;
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a {
    color: var(--text-muted); font-size: 14px; transition: var(--transition);
}
.footer ul li a:hover { color: var(--primary-light); }
.footer-social { display: flex; gap: 10px; margin-top: 16px; }
.footer-social a {
    width: 38px; height: 38px;
    background: rgba(255,255,255,0.05); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); transition: var(--transition); font-size: 16px;
}
.footer-social a:hover {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff; transform: translateY(-3px);
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 20px; display: flex;
    justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 10px;
}
.footer-bottom p { color: var(--text-muted); font-size: 13px; }
.footer-bottom .links { display: flex; gap: 20px; }
.footer-bottom .links a {
    color: var(--text-muted); font-size: 13px; transition: var(--transition);
}
.footer-bottom .links a:hover { color: var(--primary-light); }

/* ===== WHATSAPP ===== */
.whatsapp-chat {
    position: fixed; bottom: 24px; left: 24px; z-index: 999;
    display: flex; flex-direction: column;
    align-items: flex-start; gap: 10px;
}
.whatsapp-btn {
    width: 56px; height: 56px; background: #25D366;
    border-radius: 50%; display: flex;
    align-items: center; justify-content: center;
    color: #fff; font-size: 30px;
    box-shadow: 0 4px 24px rgba(37, 211, 102, 0.4);
    transition: var(--transition-bounce);
    border: none; cursor: pointer; text-decoration: none;
    animation: whatsappPulse 3s ease-in-out infinite;
}
.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 32px rgba(37, 211, 102, 0.5);
}
@keyframes whatsappPulse {
    0%, 100% { box-shadow: 0 4px 24px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 4px 40px rgba(37, 211, 102, 0.6); }
}
.whatsapp-tooltip {
    background: var(--bg-card); padding: 8px 16px;
    border-radius: var(--radius-sm); font-size: 13px;
    color: var(--text-primary); box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    display: none; font-weight: 500; margin-left: 8px;
}
.whatsapp-chat:hover .whatsapp-tooltip { display: block; }

/* ===== SCROLL TOP ===== */
.scroll-top-btn {
    position: fixed; bottom: 24px; right: 24px; z-index: 999;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff; border: none; border-radius: 50%;
    width: 48px; height: 48px; font-size: 20px;
    box-shadow: 0 4px 20px rgba(79,70,229,0.3);
    cursor: pointer; transition: all 0.3s ease;
    display: flex; align-items: center; justify-content: center;
}
.scroll-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(79,70,229,0.4);
}

/* ===== SHARED RESPONSIVE ===== */
@media (max-width: 1024px) {
    .navbar .nav-links, .navbar .nav-actions { display: none; }
    .hamburger { display: block; }
    .mobile-menu { display: block; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 768px) {
    .navbar { padding: 0 16px; }
    .navbar .brand .logo-text { font-size: 18px; }
    .navbar .brand .logo-img { height: 32px; max-width: 120px; }
    .footer-grid { grid-template-columns: 1fr; gap: 20px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .whatsapp-chat { bottom: 16px; left: 16px; }
    .whatsapp-btn { width: 48px; height: 48px; font-size: 24px; }
    .whatsapp-tooltip { display: none !important; }
    .scroll-top-btn { bottom: 16px; right: 16px; width: 44px; height: 44px; }
}
@media (max-width: 480px) {
    .navbar .brand .logo-text { font-size: 16px; }
    .navbar .brand .logo-icon { width: 34px; height: 34px; font-size: 15px; }
    .mobile-menu .mobile-actions { flex-direction: column; }
}