/* Common Navigation Styles for PowerChess */

.main-header {
    position: relative;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.main-header::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 3px;
    background: linear-gradient(90deg, #7c3aed 0%, #3b82f6 30%, #10b981 65%, #f59e0b 100%);
    opacity: 0.9;
}

.main-header .container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

@media (min-width: 768px) {
    .main-header .container { padding: 0 3rem; }
}

.main-header .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

/* Logo Styles */
.main-header .logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
}

.main-header .logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #1f2937 0%, #000 100%);
    border: 3px solid rgba(255, 215, 0, 0.4);
    border-radius: 50%;
    position: relative;
    overflow: hidden;
}

.main-header .chess-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, rgba(255, 215, 0, 0.2) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255, 215, 0, 0.2) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255, 215, 0, 0.2) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255, 215, 0, 0.2) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.main-header .gradient-text {
    background: linear-gradient(135deg, #8b5cf6, #3b82f6, #06b6d4);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Navigation Styles */
.main-header .nav {
    display: flex;
    gap: 2rem;
}

.main-header .nav-link {
    color: #64748b;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.main-header .nav-link:hover {
    color: #8b5cf6;
}

.main-header .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #8b5cf6, #3b82f6);
    transition: width 0.3s;
}

.main-header .nav-link:hover::after {
    width: 100%;
}

/* Header Actions */
.main-header .header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.main-header .user-actions {
    display: flex;
    gap: 0.75rem;
}

.main-header .auth-buttons {
    display: flex;
    gap: 0.75rem;
}

/* Button Styles */
.main-header .btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 0.875rem;
}

.main-header .btn-outline {
    background: transparent;
    color: #8b5cf6;
    border: 2px solid #8b5cf6;
}

.main-header .btn-outline:hover {
    background: #8b5cf6;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.main-header .btn-secondary {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    border: none;
}

.main-header .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.4);
}

.main-header .btn-login {
    background: transparent;
    color: #8b5cf6;
    border: 2px solid #8b5cf6;
}

.main-header .btn-login:hover {
    background: #8b5cf6;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.main-header .btn-register {
    background: linear-gradient(135deg, #7c3aed, #3b82f6);
    color: white;
    border: none;
}

.main-header .btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

/* Theme Toggle */
.main-header .theme-toggle {
    background: rgba(124, 58, 237, 0.1);
    border: 2px solid #8b5cf6;
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    color: #8b5cf6;
}

.main-header .theme-toggle:hover {
    transform: scale(1.1);
    background: rgba(124, 58, 237, 0.2);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .main-header .nav {
        display: none;
    }

    .main-header .header-actions {
        gap: 0.5rem;
    }

    .main-header .btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }

    .main-header .theme-toggle {
        width: 2.5rem;
        height: 2.5rem;
    }
}

/* Dark theme support */
body.dark .main-header {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}

body.dark .main-header .nav-link {
    color: #94a3b8;
}

body.dark .main-header .nav-link:hover {
    color: #c4b5fd;
}

body.dark .main-header .theme-toggle {
    background: rgba(139, 92, 246, 0.1);
    border-color: #c4b5fd;
    color: #c4b5fd;
}

body.dark .main-header .theme-toggle:hover {
    background: rgba(139, 92, 246, 0.2);
}

body.dark .main-header::after {
    background: linear-gradient(90deg, #8b5cf6 0%, #3b82f6 30%, #10b981 65%, #f59e0b 100%);
}