/* Navigation & Interface - Nav, Header, Search, Actions */

/* Main Layout */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

/* Navigation Bar */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--background);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.nav-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
    transition: all var(--transition-fast);
}

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

.blue-logo {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--primary);
    letter-spacing: -0.03em;
    text-decoration: none;
    transition: all var(--transition-fast);
    line-height: 1;
}

.blue-logo:hover {
    color: var(--primary-dark);
    transform: scale(1.05);
    text-decoration: none;
}

.blue-logo:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex: 1;
    justify-content: center;
    position: relative;
}

.nav-indicator {
    position: absolute;
    bottom: -6px;
    left: 0;
    height: 3px;
    background: var(--primary);
    border-radius: var(--radius-full);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
    opacity: 0;
    width: 32px;
    transform: translateX(0);
    will-change: transform, width, opacity;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: transparent;
}

.nav-link.active {
    color: var(--primary);
    background: var(--primary-alpha);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--surface-hover);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--primary-alpha);
    color: var(--primary);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: all var(--transition-fast);
}

/* Theme toggle icon animation - Perfect centering */
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform-origin: center;
    transition: all var(--transition-fast);
}

.theme-toggle .icon-sun {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

.theme-toggle .icon-moon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(180deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

/* System dark mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .theme-toggle .icon-sun {
        opacity: 0;
        transform: translate(-50%, -50%) rotate(180deg) scale(0.5);
    }
    
    :root:not([data-theme]) .theme-toggle .icon-moon {
        opacity: 1;
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
    }
}

.nav-profile {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.profile-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.profile-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.profile-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-md);
    background: var(--white);
    border-radius: 20px;
    box-shadow: 
        0 25px 50px rgba(15, 23, 42, 0.15),
        0 15px 35px rgba(15, 23, 42, 0.1),
        0 5px 15px rgba(15, 23, 42, 0.08),
        0 0 0 1px rgba(148, 163, 184, 0.1);
    border: none;
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-15px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.profile-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.profile-menu-header {
    padding: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    position: relative;
    overflow: hidden;
}


.profile-avatar-small {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-bold);
    font-size: var(--text-base);
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 8px 25px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.profile-info {
    flex: 1;
    min-width: 0;
}

.profile-name {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: white;
    line-height: 1.2;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.profile-email {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.3;
    margin-top: var(--space-xs);
    font-weight: var(--font-medium);
}

/* Apple-style elegant divider */
.profile-menu-divider {
    height: 0.5px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 0, 0, 0.08) 20%, 
        rgba(0, 0, 0, 0.12) 50%, 
        rgba(0, 0, 0, 0.08) 80%, 
        transparent 100%
    );
    position: relative;
}

.profile-menu-divider::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 0.5px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.6) 20%, 
        rgba(255, 255, 255, 0.8) 50%, 
        rgba(255, 255, 255, 0.6) 80%, 
        transparent 100%
    );
    mix-blend-mode: overlay;
}

.settings-button {
    width: 100%;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    text-align: left;
    color: var(--gray-700) !important;
}

.settings-button:hover {
    color: var(--primary) !important;
}

.settings-button svg {
    color: var(--gray-600) !important;
    transition: color 0.2s ease;
    width: 20px;
    height: 20px;
}

.settings-button:hover svg {
    color: var(--primary) !important;
}

.settings-button span {
    color: inherit !important;
    font-weight: inherit;
}

.logout-button {
    width: 100%;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    text-align: left;
    color: var(--gray-700) !important;
}

.logout-button:hover {
    color: var(--danger) !important;
}

.logout-button svg {
    color: var(--gray-600) !important;
    transition: color 0.2s ease;
    width: 20px;
    height: 20px;
}

.logout-button:hover svg {
    color: var(--danger) !important;
}

.logout-button span {
    color: inherit !important;
    font-weight: inherit;
}

/* Page Header */
.page-header {
    margin-bottom: var(--space-xl);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.page-title {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
    margin: 0;
}

.contact-counter {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    font-weight: var(--font-medium);
}

/* Action Bar */
.action-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.action-left {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex: 1;
}

.action-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Search */
.search-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    flex: 1;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    stroke: var(--text-tertiary);
    z-index: 2;
    transition: all 0.2s ease;
}

#search-input {
    width: 100%;
    height: 50px;
    padding: 0 80px 0 50px;
    background-color: var(--gray-100);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    color: #FFFFFF !important;
    font-size: 16px;
    font-family: var(--font-family);
    outline: none;
    transition: all 0.2s ease;
}

#search-input::placeholder {
    color: var(--text-tertiary) !important;
}

#search-input:focus {
    border-color: var(--primary);
    background-color: var(--input-bg) !important;
    color: var(--text-primary) !important;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.3);
}

#search-input.ai-mode {
    border-color: var(--primary);
}

#search-input.ai-mode:focus {
    border-color: var(--primary);
    background-color: var(--input-bg) !important;
    color: var(--text-primary) !important;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

/* AI Toggle */
.ai-toggle-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    z-index: 3;
    height: 34px;
}

.ai-toggle-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-50%) scale(1.02);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.ai-toggle-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.ai-toggle-btn.active:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.ai-icon {
    width: 16px;
    height: 16px;
    stroke: var(--text-tertiary);
    transition: all 0.2s ease;
}

.ai-toggle-btn:hover .ai-icon,
.ai-toggle-btn.active .ai-icon {
    stroke: white;
}

.ai-label {
    font-size: 12px;
    font-weight: 600;
    font-family: var(--font-family);
    color: var(--text-secondary);
    transition: all 0.2s ease;
    letter-spacing: 0.5px;
}

.ai-toggle-btn:hover .ai-label,
.ai-toggle-btn.active .ai-label {
    color: white;
}

.ai-toggle-btn.loading {
    pointer-events: none;
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.ai-toggle-btn.loading .ai-icon {
    animation: aiThinking 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    stroke: white;
}

.ai-toggle-btn .ai-icon {
    transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.3s ease;
}

.ai-toggle-btn.loading-end .ai-icon {
    animation: aiThinkingEnd 0.6s cubic-bezier(0.25, 0.1, 0.25, 1) forwards;
    stroke: white;
}

.ai-toggle-btn.loading .ai-label {
    color: white;
}

@keyframes aiThinking {
    0% { transform: rotate(0deg) scale(1); opacity: 1; }
    25% { transform: rotate(90deg) scale(1.1); opacity: 0.8; }
    50% { transform: rotate(180deg) scale(1); opacity: 1; }
    75% { transform: rotate(270deg) scale(1.1); opacity: 0.8; }
    100% { transform: rotate(360deg) scale(1); opacity: 1; }
}

@keyframes aiThinkingEnd {
    0% { transform: rotate(var(--current-rotation, 0deg)) scale(1); opacity: 1; }
    50% { transform: rotate(calc(var(--current-rotation, 0deg) + 180deg)) scale(1.05); opacity: 0.9; }
    100% { transform: rotate(0deg) scale(1); opacity: 1; }
}

/* View Toggle - Simple & Great */
.view-toggle {
    display: flex;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
    position: relative;
}

.view-toggle::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 36px;
    height: 36px;
    background: var(--surface);
    border-radius: var(--radius-sm);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

.view-toggle.list-active::before {
    transform: translateX(40px);
}

.view-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.25s ease;
    position: relative;
    z-index: 1;
}

.view-btn:hover:not(.active) {
    color: var(--primary);
}

.view-btn.active {
    color: var(--primary);
}

.view-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Buttons */
.btn-primary {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    padding: var(--space-sm) var(--space-lg);
    background: var(--gray-100);
    color: var(--text-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

/* Message Toast */
.message-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--white);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    z-index: 10000;
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    max-width: 400px;
    word-wrap: break-word;
}

.message-toast.show {
    transform: translateX(0);
    opacity: 1;
}

.message-toast.success {
    border-left: 4px solid var(--success);
    background: linear-gradient(135deg, #F0FDF4 0%, #ECFDF5 100%);
}

.message-toast.error {
    border-left: 4px solid var(--danger);
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
}

.message-toast.info {
    border-left: 4px solid var(--info);
    background: linear-gradient(135deg, #F0FDFA 0%, #ECFEFF 100%);
}

.message-toast.warning {
    border-left: 4px solid var(--warning);
    background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .nav-container,
    .main-content {
        max-width: 100%;
    }
    
    .search-container {
        max-width: 320px;
    }
}

@media (max-width: 768px) {
    .navbar {
        position: sticky;
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .page-title {
        font-size: var(--text-2xl);
    }
    
    .action-bar {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
    }
    
    .action-left {
        flex-direction: column;
        gap: var(--space-md);
        width: 100%;
    }
    
    .search-container {
        max-width: none;
    }
}