/* Navbar - Стилі навігації */

/* Import beautiful font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(26, 26, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.navbar.scrolled {
    box-shadow: 0 4px 30px var(--shadow);
    background: rgba(26, 26, 26, 0.95);
}

.nav-container {
    max-width: 100%;
    margin: 0;
    padding: 0.6rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--success));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    transition: transform 0.3s ease, filter 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    letter-spacing: -0.02em;
    margin-left: 2rem;
}

.logo:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: nowrap;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    white-space: nowrap;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.nav-btn:hover {
    background: var(--bg-card);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.create-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: white;
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-weight: 600;
    border: none;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.create-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
}

.create-btn.active {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.6);
}

.controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-shrink: 0;
    margin-left: auto;
    margin-right: 2rem;
}

/* Language Dropdown Container */
.lang-dropdown-container {
    position: relative;
}

/* Control Button Base Styles */
.control-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.45rem 0.9rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.control-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.control-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* Theme Button - Стильна кнопка теми */
.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    padding: 0;
    background: linear-gradient(145deg, var(--bg-card), var(--bg-secondary));
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.theme-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent), var(--success));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 11px;
}

.theme-btn:hover::before {
    opacity: 1;
}

.theme-btn:hover {
    transform: translateY(-2px) rotate(15deg);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    border-color: transparent;
}

.theme-btn span,
.theme-btn::after {
    position: relative;
    z-index: 1;
}

/* Language Dropdown - Сучасний dropdown */
.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0.5rem;
    min-width: 180px;
    display: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform-origin: top right;
}

.lang-dropdown.show {
    display: block;
    animation: dropdownSlide 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes dropdownSlide {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.6rem 1rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 100%;
    text-align: left;
    font-size: 0.9rem;
}

.lang-option:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(16, 185, 129, 0.1));
    transform: translateX(4px);
}

.lang-option:active {
    transform: translateX(4px) scale(0.98);
}

.lang-flag {
    font-size: 1.2rem;
}

/* Auth Buttons - Кнопки авторизації */
.auth-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: 0.5rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--border);
}

.auth-btn {
    padding: 0.45rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.auth-btn.chat-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border: none;
    color: white;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.auth-btn.chat-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.5);
}

.auth-btn.chat-btn span:first-child {
    font-size: 1.1rem;
}

/* Sign in Button - Стильна кнопка входу */
.auth-btn.signin-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    box-shadow: none;
}

.auth-btn.signin-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

.auth-btn.signin-btn span:first-child {
    font-size: 1rem;
}

/* Light theme navbar overrides */
[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
}

[data-theme="light"] .nav-btn:hover {
    background: var(--bg-card);
}

[data-theme="light"] .control-btn {
    background: var(--bg-card);
}

[data-theme="light"] .control-btn:hover {
    background: var(--accent);
    color: white;
}

[data-theme="light"] .theme-btn {
    background: linear-gradient(145deg, #ffffff, #f0f0f0);
}

[data-theme="light"] .lang-dropdown {
    background: rgba(255, 255, 255, 0.95);
    border-color: var(--border);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .lang-option:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.05));
}

[data-theme="light"] .auth-btn.chat-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
}

[data-theme="light"] .auth-btn.chat-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), var(--accent));
}

/* Responsive */
@media (max-width: 1200px) {
    .nav-container {
        padding: 0.6rem 1.5rem;
    }

    .nav-links {
        gap: 0.3rem;
    }

    .nav-btn {
        padding: 0.4rem 0.7rem;
        font-size: 0.85rem;
    }

    .auth-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 968px) {
    .nav-container {
        padding: 0.5rem 1rem;
        flex-wrap: wrap;
    }

    .logo {
        font-size: 1.1rem;
    }

    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.3rem;
        padding-top: 0.5rem;
        border-top: 1px solid var(--border);
        margin-top: 0.5rem;
    }

    .nav-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }

    .controls {
        gap: 0.3rem;
    }

    .control-btn {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
    }

    .theme-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .auth-buttons {
        margin-left: 0.3rem;
        padding-left: 0.3rem;
    }

    .auth-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.75rem;
    }
}

@media (max-width: 640px) {
    .nav-container {
        padding: 0.5rem 0.8rem;
    }

    .logo {
        font-size: 1rem;
    }

    .create-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .auth-buttons {
        border-left: none;
        margin-left: 0;
        padding-left: 0;
    }

    .lang-dropdown {
        right: -50px;
        min-width: 160px;
    }
}

@media (max-width: 480px) {
    .controls {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .auth-btn.chat-btn span:last-child {
        display: none;
    }
}