/* ============================================
   DREXET AI - Chat Header Styles
   ============================================ */

.chat-header {
    height: 60px;
    padding: 0 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .chat-header {
    background-color: rgba(33, 33, 33, 0.8);
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    min-width: 0;
}

.chat-header-center {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 600px;
}

.chat-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: flex-end;
}

/* Model Selector */
.model-selector-wrapper {
    position: relative;
}

.model-selector-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.model-selector-btn:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-hover);
}

.model-name {
    color: var(--text-primary);
}

.dropdown-icon {
    color: var(--text-tertiary);
    transition: transform var(--transition-base);
}

.model-selector-btn:hover .dropdown-icon {
    transform: translateY(2px);
}

/* Memory Indicator */
.memory-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.memory-indicator:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.memory-indicator.active {
    background-color: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.memory-indicator svg {
    color: var(--text-tertiary);
}

.memory-indicator.active svg {
    color: var(--success);
}

/* Chat Title Input */
.chat-title-input {
    width: 100%;
    max-width: 400px;
    padding: 6px 12px;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-align: center;
    transition: all var(--transition-base);
}

.chat-title-input:focus {
    outline: none;
    border-color: var(--border-color);
    background-color: var(--bg-secondary);
}

.chat-title-input::placeholder {
    color: var(--text-tertiary);
}

/* Chat Project Indicator */
.chat-project-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.chat-project-indicator svg {
    color: var(--accent-primary);
}

/* Chat Title Display */
.chat-title-display {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-align: center;
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Header Icon Buttons */
.header-icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.header-icon-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    padding: 4px;
    animation: slideDown var(--transition-base) ease-out;
}

.dropdown-menu.model-menu {
    left: 0;
    right: auto;
    min-width: 240px;
}

.menu-section {
    padding: 4px 0;
}

.menu-section-title {
    padding: 8px 12px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
}

.menu-item {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-normal);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: left;
}

.menu-item:hover {
    background-color: var(--bg-hover);
}

.menu-item svg {
    flex-shrink: 0;
    color: var(--text-tertiary);
}

.menu-item .check-icon {
    margin-left: auto;
    color: var(--accent-primary);
}

.menu-item.active .check-icon {
    display: block;
}

.menu-item:not(.active) .check-icon {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .chat-header {
        padding: 0 16px;
    }

    .chat-header-left,
    .chat-header-right {
        flex: 0 0 auto;
    }

    .chat-header-center {
        flex: 1;
        min-width: 0;
    }

    .chat-title-input {
        max-width: 100%;
        font-size: var(--font-size-sm);
    }

    .memory-indicator span {
        display: none;
    }
}