/*
 * BlueTech Main Stylesheet
 * Uses CSS variables from UI-Settings.css for customization
 */

/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-main);
    color: var(--color-text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    min-width: var(--sidebar-min-width);
    max-width: var(--sidebar-max-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border-color);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform var(--sidebar-transition-duration) var(--sidebar-transition-timing);
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--sidebar-header-height);
    padding: 0 var(--spacing-md);
    background-color: var(--sidebar-header-bg);
    border-bottom: 1px solid var(--sidebar-border-color);
    flex-shrink: 0;
}

.sidebar-title {
    font-size: var(--sidebar-title-size);
    font-weight: var(--sidebar-title-weight);
    color: var(--sidebar-title-color);
}

.sidebar-close-btn {
    width: var(--close-btn-width);
    height: var(--close-btn-height);
    border-radius: var(--close-btn-border-radius);
    background-color: var(--close-btn-bg);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--close-btn-icon-color);
    transition: all var(--button-transition-duration) var(--button-transition-timing);
}

.sidebar-close-btn:hover {
    background-color: var(--close-btn-bg-hover);
    color: var(--close-btn-icon-color-hover);
}

/* Sidebar Toggle Button */
.sidebar-toggle-btn {
    position: fixed;
    bottom: var(--toggle-btn-bottom);
    left: var(--toggle-btn-left);
    width: var(--toggle-btn-width);
    height: var(--toggle-btn-height);
    border-radius: var(--toggle-btn-border-radius);
    background-color: var(--toggle-btn-bg);
    color: var(--toggle-btn-text-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    box-shadow: var(--toggle-btn-shadow);
    z-index: 999;
    transition: all var(--button-transition-duration) var(--button-transition-timing);
    opacity: 1;
    transform: scale(1);
}

.sidebar-toggle-btn:hover {
    background-color: var(--toggle-btn-bg-hover);
    transform: scale(1.05);
}

.sidebar-toggle-btn.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.toggle-btn-text {
    font-size: var(--toggle-btn-text-size);
    font-weight: var(--toggle-btn-text-weight);
}

/* Chat Container */
.chat-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--chat-messages-padding);
    display: flex;
    flex-direction: column;
    gap: var(--chat-message-gap);
}

/* Message Styles */
.message {
    max-width: var(--message-bubble-max-width);
    padding: var(--message-bubble-padding);
    border-radius: var(--message-bubble-border-radius);
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.own {
    align-self: flex-end;
    background-color: var(--message-own-bg);
    color: var(--message-own-text-color);
    border-bottom-right-radius: 4px;
}

.message.other {
    align-self: flex-start;
    background-color: var(--message-other-bg);
    color: var(--message-other-text-color);
    border-bottom-left-radius: 4px;
}

.message-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.message-username {
    font-size: var(--message-username-size);
    font-weight: var(--message-username-weight);
    opacity: 0.9;
}

.message-timestamp {
    font-size: var(--message-timestamp-size);
    color: var(--message-timestamp-color);
}

.message.own .message-timestamp {
    color: rgba(255, 255, 255, 0.7);
}

.message-content {
    font-size: var(--message-text-size);
    line-height: var(--message-text-line-height);
    word-wrap: break-word;
}

/* Chat Input Container */
.chat-input-container {
    padding: var(--spacing-md);
    border-top: 1px solid var(--sidebar-border-color);
    background-color: var(--sidebar-bg);
}

.username-section {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.username-input {
    flex: 1;
    height: var(--username-input-height);
    padding: var(--username-input-padding);
    border-radius: var(--username-input-border-radius);
    background-color: var(--username-input-bg);
    border: 1px solid var(--username-input-border);
    color: var(--username-input-text-color);
    font-size: var(--username-input-text-size);
    font-family: inherit;
    transition: border-color var(--button-transition-duration) var(--button-transition-timing);
}

.username-input::placeholder {
    color: var(--username-input-placeholder-color);
}

.username-input:focus {
    outline: none;
    border-color: var(--color-border-focus);
}

.set-username-btn {
    width: var(--set-username-btn-width);
    height: var(--set-username-btn-height);
    border-radius: var(--set-username-btn-border-radius);
    background-color: var(--set-username-btn-bg);
    color: var(--set-username-btn-text-color);
    border: none;
    cursor: pointer;
    font-size: var(--set-username-btn-text-size);
    font-weight: var(--set-username-btn-text-weight);
    font-family: inherit;
    transition: background-color var(--button-transition-duration) var(--button-transition-timing);
}

.set-username-btn:hover {
    background-color: var(--set-username-btn-bg-hover);
}

.message-section {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.message-input {
    flex: 1;
    min-height: var(--message-input-min-height);
    max-height: var(--message-input-max-height);
    padding: var(--message-input-padding);
    border-radius: var(--message-input-border-radius);
    background-color: var(--message-input-bg);
    border: 1px solid var(--message-input-border);
    color: var(--message-input-text-color);
    font-size: var(--message-input-text-size);
    font-family: inherit;
    line-height: var(--message-input-line-height);
    resize: none;
    transition: border-color var(--button-transition-duration) var(--button-transition-timing);
}

.message-input::placeholder {
    color: var(--message-input-placeholder-color);
}

.message-input:focus {
    outline: none;
    border-color: var(--message-input-border-focus);
}

.send-message-btn {
    width: var(--send-btn-width);
    height: var(--send-btn-height);
    border-radius: var(--send-btn-border-radius);
    background-color: var(--send-btn-bg);
    color: var(--send-btn-icon-color);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background-color var(--button-transition-duration) var(--button-transition-timing);
}

.send-message-btn:hover {
    background-color: var(--send-btn-bg-hover);
}

/* Page Sections (SPA) */
.page {
    display: none;
}

.page.active {
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Hide navigation items */
.nav-hidden {
    display: none !important;
}

/* Main Content */
.main-content {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--sidebar-transition-duration) var(--sidebar-transition-timing);
}

.main-content.shifted {
    margin-left: var(--sidebar-width);
}

/* Navigation Bar */
.navbar {
    width: var(--navbar-width);
    height: var(--navbar-height);
    background-color: transparent;
    position: sticky;
    top: 0;
    z-index: 100;
    padding-top: var(--navbar-padding-top);
    padding-bottom: var(--navbar-padding-bottom);
    padding-right: var(--navbar-padding-right);
    padding-left: var(--navbar-padding-left);
    display: flex;
    justify-content: center;
}

.navbar-container {
    max-width: var(--navbar-container-width, var(--navbar-max-width));
    height: var(--navbar-container-height, 100%);
    padding-top: var(--navbar-container-padding-top, 0);
    padding-bottom: var(--navbar-container-padding-bottom, 0);
    padding-right: var(--navbar-container-padding-right, 24px);
    padding-left: var(--navbar-container-padding-left, 24px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    background-color: var(--navbar-bg);
    border: 1px solid var(--navbar-border-color);
    border-radius: 9999px;
    box-shadow: var(--navbar-shadow);
}

/* Logo */
.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--logo-gap);
    text-decoration: none;
    flex-shrink: 0;
    width: var(--logo-width, auto);
    height: var(--logo-height, auto);
    padding-top: var(--logo-padding-top, 0);
    padding-bottom: var(--logo-padding-bottom, 0);
    padding-right: var(--logo-padding-right, 0);
    padding-left: var(--logo-padding-left, 0);
}

.logo-icon {
    width: var(--logo-icon-size);
    height: var(--logo-icon-size);
    color: var(--logo-icon-color);
}

.logo-text {
    font-size: var(--logo-text-size);
    font-weight: var(--logo-text-weight);
    color: var(--logo-text-color);
}

/* Desktop Navigation */
.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--nav-link-gap);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: var(--nav-link-width, auto);
    height: var(--nav-link-height, auto);
    padding-top: var(--nav-link-padding-top, 10px);
    padding-bottom: var(--nav-link-padding-bottom, 10px);
    padding-right: var(--nav-link-padding-right, 18px);
    padding-left: var(--nav-link-padding-left, 18px);
    border-radius: var(--nav-link-border-radius);
    background-color: var(--nav-link-bg);
    color: var(--nav-link-text-color);
    text-decoration: none;
    font-size: var(--nav-link-text-size);
    font-weight: var(--nav-link-text-weight);
    transition: all var(--button-transition-duration) var(--button-transition-timing);
}

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

.nav-link:hover .nav-icon {
    filter: brightness(0) saturate(100%);
}

.nav-link.active {
    background-color: var(--nav-link-bg-active);
    color: var(--nav-link-text-color-active);
}

.nav-link.active .nav-icon {
    filter: none;
}

.nav-icon {
    width: var(--nav-link-icon-size);
    height: var(--nav-link-icon-size);
    color: var(--nav-link-icon-color);
    transition: filter var(--button-transition-duration) var(--button-transition-timing);
}

.nav-text {
    display: inline;
}

/* Theme Switcher */
.theme-switcher {
    display: flex;
    align-items: center;
    gap: var(--theme-switcher-gap);
    width: var(--theme-switcher-width, auto);
    height: var(--theme-switcher-height, auto);
    padding-top: var(--theme-switcher-padding-top, 4px);
    padding-bottom: var(--theme-switcher-padding-bottom, 4px);
    padding-right: var(--theme-switcher-padding-right, 4px);
    padding-left: var(--theme-switcher-padding-left, 4px);
    background-color: var(--theme-switcher-bg);
    border: 1px solid var(--theme-switcher-border);
    border-radius: var(--theme-switcher-border-radius);
}

.theme-option {
    width: var(--theme-option-width);
    height: var(--theme-option-height);
    border-radius: var(--theme-option-border-radius);
    background-color: var(--theme-option-bg);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--button-transition-duration) var(--button-transition-timing);
}

.theme-option:hover {
    background-color: var(--theme-option-bg-hover);
}

.theme-option.active {
    background-color: var(--theme-option-bg-active);
    box-shadow: var(--theme-option-shadow-active);
}

.theme-option.active .theme-icon {
    filter: none;
}

.theme-icon {
    width: var(--theme-option-icon-size);
    height: var(--theme-option-icon-size);
    color: var(--theme-option-icon-color);
}

.theme-option.active .theme-icon {
    color: var(--theme-option-icon-color-active);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    width: var(--mobile-menu-btn-width);
    height: var(--mobile-menu-btn-height);
    border-radius: var(--mobile-menu-btn-border-radius);
    background-color: var(--mobile-menu-btn-bg);
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background-color var(--button-transition-duration) var(--button-transition-timing);
}

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

.mobile-menu-btn .menu-icon,
.mobile-menu-btn .close-icon {
    width: var(--mobile-menu-btn-icon-size);
    height: var(--mobile-menu-btn-icon-size);
    color: var(--mobile-menu-btn-icon-color);
}

.mobile-menu-btn .hidden {
    display: none;
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    background-color: var(--mobile-menu-bg);
    border: 1px solid var(--mobile-menu-border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--mobile-menu-shadow);
    padding: var(--mobile-menu-padding);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--sidebar-transition-duration) var(--sidebar-transition-timing);
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--mobile-menu-gap);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--mobile-nav-link-padding);
    border-radius: var(--mobile-nav-link-border-radius);
    background-color: var(--mobile-nav-link-bg);
    color: var(--mobile-nav-link-text-color);
    text-decoration: none;
    font-size: var(--nav-link-text-size);
    font-weight: var(--nav-link-text-weight);
    transition: background-color var(--button-transition-duration) var(--button-transition-timing);
}

.mobile-nav-link:hover {
    background-color: var(--mobile-nav-link-bg-hover);
}

.mobile-nav-link.active {
    background-color: var(--mobile-nav-link-bg-active);
    color: var(--nav-link-text-color-active);
}

.mobile-nav-link .nav-icon {
    width: 22px;
    height: 22px;
    color: var(--mobile-nav-link-icon-color);
}

.mobile-theme-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-sm);
    border-top: 1px solid var(--mobile-menu-border-color);
}

.mobile-theme-label {
    font-size: var(--nav-link-text-size);
    font-weight: var(--nav-link-text-weight);
    color: var(--color-text-secondary);
}

.theme-switcher.mobile {
    margin: 0;
}

/* Hero Section */
.hero {
    background: var(--hero-bg);
    padding: var(--hero-padding-top, 80px) var(--hero-padding-x, 32px) var(--hero-padding-bottom, 80px);
    min-height: var(--hero-min-height, auto);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content {
    max-width: var(--hero-max-width);
}

.hero-title {
    font-size: var(--hero-title-size);
    font-weight: var(--hero-title-weight);
    color: var(--hero-title-color);
    line-height: var(--hero-title-line-height);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: var(--hero-description-size);
    color: var(--hero-description-color);
    line-height: var(--hero-description-line-height);
}

/* Features Section */
.features {
    padding: var(--spacing-2xl) var(--spacing-xl);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--feature-cards-gap, var(--feature-card-gap));
    background-color: var(--color-bg-secondary);
    flex: 1;
}

.feature-card {
    width: var(--feature-card-width);
    min-width: var(--feature-card-min-width);
    min-height: var(--feature-card-min-height, auto);
    padding: var(--feature-card-padding-top, 32px) var(--feature-card-padding-x, 24px) var(--feature-card-padding-bottom, 32px);
    background-color: var(--feature-card-bg);
    border: 1px solid var(--feature-card-border);
    border-radius: var(--feature-card-border-radius);
    box-shadow: var(--feature-card-shadow);
    text-align: center;
    transition: all var(--card-transition-duration) var(--card-transition-timing);
}

.feature-card:hover {
    box-shadow: var(--feature-card-shadow-hover);
    transform: translateY(-4px);
}

.feature-icon {
    width: calc(var(--feature-icon-size) + var(--feature-icon-padding) * 2);
    height: calc(var(--feature-icon-size) + var(--feature-icon-padding) * 2);
    background-color: var(--feature-icon-bg);
    border-radius: var(--feature-icon-border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--feature-icon-color);
}

.feature-title {
    font-size: var(--feature-title-size);
    font-weight: var(--feature-title-weight);
    color: var(--feature-title-color);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: var(--feature-description-size);
    color: var(--feature-description-color);
    line-height: var(--feature-description-line-height);
}

/* Footer */
.footer {
    height: var(--footer-height);
    padding: var(--footer-padding-top, 0) var(--spacing-xl) var(--footer-padding-bottom, 0);
    background-color: var(--footer-bg);
    border-top: 1px solid var(--footer-border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-text {
    font-size: var(--footer-text-size);
    color: var(--footer-text-color);
}

/* Responsive Styles */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        max-width: 100%;
    }

    .main-content.shifted {
        margin-left: 0;
    }

    /* Mobile Navigation */
    .navbar {
        padding: var(--spacing-sm);
    }

    .navbar-container {
        justify-content: space-between;
        padding: var(--spacing-sm) var(--spacing-md);
        width: 100%;
        max-width: none;
        border-radius: 9999px;
    }

    .navbar-nav {
        display: none;
    }

    .theme-switcher:not(.mobile) {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-description {
        font-size: var(--font-size-md);
    }

    .feature-card {
        width: 100%;
        max-width: 400px;
    }

    .hero {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .features {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}

/* Tablet Styles */
@media (max-width: 992px) and (min-width: 769px) {
    .navbar-container {
        padding: 0 var(--spacing-md);
        gap: var(--spacing-lg);
    }

    .nav-text {
        display: none;
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* Scrollbar Styles */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background-color: var(--color-border);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-text-muted);
}

/* System Message */
.message.system {
    align-self: center;
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
}

/* Dark Theme Icon Filters */
html[data-theme="dark"] .nav-icon,
html[data-theme="dark"] .theme-icon,
html[data-theme="dark"] .menu-icon,
html[data-theme="dark"] .close-icon,
html[data-theme="dark"] .sidebar-close-btn .icon {
    filter: invert(1) brightness(0.8);
}

html[data-theme="dark"] .nav-link.active .nav-icon {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(180deg) brightness(103%) contrast(97%);
}

html[data-theme="dark"] .theme-option.active .theme-icon {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(180deg) brightness(103%) contrast(97%);
}