/* ============================================
   IMPROVED NAVBAR - PROFESSIONAL & RESPONSIVE
   ============================================ */

:root {
    --navbar-height: 70px;
    --navbar-padding: 12px 0;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Header Base */
header {
    background: var(--accent-color);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1001;
    transition: var(--transition-smooth);
}

header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

/* Navbar Container */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--navbar-padding);
    gap: 20px;
    flex-wrap: nowrap;
    min-height: var(--navbar-height);
}

/* Logo Container */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    min-width: fit-content;
}

.logo-container img {
    height: 60px;
    width: auto;
    display: block;
    transition: var(--transition-smooth);
}

.logo-container img:hover {
    transform: scale(1.05);
}

.logo-text {
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--primary-color);
    white-space: nowrap;
    transition: var(--transition-smooth);
}

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 30px;
    flex: 1;
    justify-content: center;
    align-items: center;
    list-style: none;
}

.nav-links li {
    position: relative;
}

.nav-links a {
    font-weight: 600;
    color: var(--primary-color);
    transition: var(--transition-smooth);
    font-size: 0.95rem;
    position: relative;
    padding: 8px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    right: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--secondary-color);
}

/* Navbar Controls */
.navbar-controls {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-shrink: 0;
}

/* Language & Theme Buttons */
.lang-toggle,
.theme-toggle {
    background: var(--light-bg);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 14px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.85rem;
    white-space: nowrap;
}

.lang-toggle:hover,
.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 31, 63, 0.2);
}

.lang-toggle.active {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(128, 0, 0, 0.2);
}

.theme-toggle {
    width: 45px;
    height: 45px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    border-radius: 50%;
}

/* CTA Button */
.nav-cta {
    background: linear-gradient(135deg, #25d366, #20ba58);
    color: white !important;
    padding: 10px 18px;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.25);
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.nav-cta:hover {
    background: linear-gradient(135deg, #20ba58, #1a9447);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(37, 211, 102, 0.35);
}

.nav-cta:active {
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition-smooth);
    background: transparent;
    border: none;
}

.mobile-menu-toggle:hover {
    background: var(--light-bg);
}

.mobile-menu-toggle i {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition-smooth);
}

/* Dark Mode Support */
body.dark-mode header {
    background: var(--accent-color);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
}

body.dark-mode .nav-links a {
    color: var(--text-color);
}

body.dark-mode .nav-links a:hover,
body.dark-mode .nav-links a.active {
    color: var(--secondary-color);
}

body.dark-mode .logo-text {
    color: var(--text-color);
}

body.dark-mode .lang-toggle,
body.dark-mode .theme-toggle {
    background: var(--light-bg);
    border-color: var(--text-color);
    color: var(--text-color);
}

body.dark-mode .lang-toggle:hover,
body.dark-mode .theme-toggle:hover {
    background: var(--text-color);
    color: var(--light-bg);
}

body.dark-mode .lang-toggle.active {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
}

body.dark-mode .mobile-menu-toggle i {
    color: var(--text-color);
}

/* ============================================
   RESPONSIVE DESIGN - TABLET (769px - 1024px)
   ============================================ */

@media (max-width: 1024px) {
    .navbar {
        gap: 15px;
    }

    .nav-links {
        gap: 20px;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .lang-toggle {
        padding: 7px 12px;
        font-size: 0.8rem;
    }

    .nav-cta {
        padding: 9px 16px;
        font-size: 0.9rem;
    }
}

/* ============================================
   RESPONSIVE DESIGN - MOBILE (max-width: 768px)
   ============================================ */

@media (max-width: 768px) {
    :root {
        --navbar-height: 60px;
        --navbar-padding: 10px 0;
    }

    .navbar {
        position: relative;
        flex-wrap: wrap;
        gap: 10px;
    }

    .logo-container img {
        height: 50px;
    }

    .logo-text {
        font-size: 1.1rem;
    }

    .mobile-menu-toggle {
        display: flex;
        order: 2;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: 15px 0;
        text-align: center;
        background: var(--accent-color);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        z-index: 999;
        order: 4;
        border-top: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        font-size: 0.95rem;
        padding: 12px 20px;
        display: block;
    }

    .nav-links a::after {
        display: none;
    }

    .navbar-controls {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 8px;
        margin-top: 8px;
        flex-wrap: wrap;
    }

    .lang-toggle {
        flex: 1;
        min-width: 70px;
        padding: 7px 10px;
        font-size: 0.8rem;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .nav-cta {
        flex: 1;
        min-width: 100px;
        padding: 8px 12px;
        font-size: 0.85rem;
        justify-content: center;
    }

    .nav-cta i {
        display: none;
    }
}

/* ============================================
   RESPONSIVE DESIGN - SMALL MOBILE (max-width: 600px)
   ============================================ */

@media (max-width: 600px) {
    .navbar {
        padding: 8px 0;
    }

    .logo-container {
        gap: 8px;
    }

    .logo-container img {
        height: 45px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .lang-toggle {
        min-width: 60px;
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .nav-cta {
        min-width: 80px;
        padding: 7px 10px;
        font-size: 0.8rem;
    }

    .mobile-menu-toggle i {
        font-size: 1.3rem;
    }
}

/* ============================================
   RESPONSIVE DESIGN - EXTRA SMALL (max-width: 480px)
   ============================================ */

@media (max-width: 480px) {
    .navbar {
        padding: 6px 0;
    }

    .logo-container img {
        height: 40px;
    }

    .logo-text {
        font-size: 0.9rem;
    }

    .navbar-controls {
        gap: 6px;
    }

    .lang-toggle {
        min-width: 50px;
        padding: 5px 6px;
        font-size: 0.7rem;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }

    .nav-cta {
        min-width: 70px;
        padding: 6px 8px;
        font-size: 0.75rem;
    }

    .mobile-menu-toggle i {
        font-size: 1.2rem;
    }
}

/* ============================================
   ACCESSIBILITY & FOCUS STATES
   ============================================ */

.nav-links a:focus-visible,
.lang-toggle:focus-visible,
.theme-toggle:focus-visible,
.nav-cta:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    header {
        position: static;
        box-shadow: none;
    }

    .navbar-controls,
    .mobile-menu-toggle {
        display: none;
    }
}