/**
 * Interface CSS - MecaStream Dev Phase 2
 * Header fixe, Sidebar déroulante, Responsive
 * Compatible avec le registry.py de Phase 1
 */

/* ============================================
   VARIABLES CSS
   ============================================ */
:root {
    /* Couleurs principales */
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;

    /* Couleurs UI */
    --text-color: #333;
    --text-light: #6c757d;
    --bg-color: #f8f9fa;
    --border-color: #dee2e6;
    --white: #ffffff;
    --black: #000000;

    /* Dimensions */
    --header-height: 60px;
    --sidebar-width: 350px;
    --sidebar-width-desktop: 280px;

    /* Animations */
    --transition-speed: 0.3s;
    --transition-ease: ease;

    /* Ombres */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
}

/* ============================================
   RESET & GLOBALS
   ============================================ */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

/* ============================================
   HEADER FIXE
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    max-width: 100%;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo / Brand */
.header-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 18px;
    font-weight: 600;
    transition: color var(--transition-speed) var(--transition-ease);
}

.brand-link:hover {
    color: var(--primary-color);
}

.brand-icon {
    font-size: 24px;
    color: var(--primary-color);
}

.brand-text {
    font-size: 18px;
    font-weight: 600;
}

/* Hamburger Button */
.hamburger-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    font-size: 24px;
    transition: all var(--transition-speed) var(--transition-ease);
    border-radius: 6px;
}

.hamburger-btn:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

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

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb-container {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 20px;
    margin-top: var(--header-height);
}

.breadcrumb {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: 12px;
    color: var(--text-light);
}

.breadcrumb-item a,
.breadcrumb-item button {
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background var(--transition-speed);
}

.breadcrumb-item a:hover,
.breadcrumb-item button:hover {
    background: var(--bg-color);
}

.breadcrumb-item.active {
    color: var(--text-color);
    font-weight: 600;
}

.breadcrumb-item i {
    font-size: 14px;
}

/* ============================================
   SIDEBAR OVERLAY
   ============================================ */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed) var(--transition-ease),
                visibility var(--transition-speed) var(--transition-ease);
    z-index: 998;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   SIDEBAR DÉROULANTE
   ============================================ */
.sidebar {
    position: fixed;
    top: var(--header-height);
    right: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateX(100%);
    transition: transform var(--transition-speed) var(--transition-ease);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 999;
}

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

/* Sidebar Header */
.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--white);
    z-index: 10;
}

.sidebar-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.sidebar-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    font-size: 20px;
    border-radius: 6px;
    transition: all var(--transition-speed) var(--transition-ease);
}

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

/* Sidebar Content */
.sidebar-content {
    padding: 20px 0;
}

/* Sidebar Sections */
.sidebar-section {
    margin-bottom: 20px;
}

/* Section Toggle Button */
.section-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    text-align: left;
    transition: background var(--transition-speed);
}

.section-toggle:hover {
    background: var(--bg-color);
}

.section-icon {
    font-size: 18px;
    color: var(--primary-color);
}

.section-title {
    flex: 1;
}

.toggle-icon {
    font-size: 14px;
    color: var(--text-light);
    transition: transform var(--transition-speed) var(--transition-ease);
}

.section-toggle[aria-expanded="false"] .toggle-icon {
    transform: rotate(-90deg);
}

/* Nav Submenu */
.nav-submenu {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height var(--transition-speed) var(--transition-ease);
}

.nav-submenu.collapsed {
    max-height: 0;
}

/* App Links */
.app-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px 12px 40px;
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    transition: all var(--transition-speed) var(--transition-ease);
    position: relative;
}

.app-link:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.app-link i {
    font-size: 16px;
    color: var(--text-light);
    transition: color var(--transition-speed);
}

.app-link:hover i {
    color: var(--primary-color);
}

.app-name {
    flex: 1;
}

/* App Link Active State */
.app-link[aria-current="page"] {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
    border-left: 4px solid var(--primary-hover);
    padding-left: 36px;
}

.app-link[aria-current="page"]:hover {
    background: var(--primary-hover);
}

.app-link[aria-current="page"] i {
    color: var(--white);
}

.app-link[aria-current="page"]::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--white);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.app-active-icon {
    margin-left: auto;
    font-size: 14px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

/* App Loading State */
.app-link.loading {
    opacity: 0.6;
    pointer-events: none;
    background-color: var(--primary-color);
    color: var(--white);
}

.app-link.loading .app-loading {
    display: inline-block !important;
}

.app-link .app-loading {
    margin-left: 8px;
    display: none;
}

.app-link .app-loading.hidden {
    display: none;
}

.app-link .app-loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Danger Link (Déconnexion) */
.app-link-danger:hover {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.app-link-danger:hover i {
    color: var(--danger-color);
}

/* ============================================
   EMPTY STATES
   ============================================ */
.empty-state {
    padding: 40px 20px;
    text-align: center;
    list-style: none;
}

.empty-state-content {
    max-width: 280px;
    margin: 0 auto;
}

.empty-state-icon {
    color: var(--text-light);
    margin-bottom: 16px;
}

.empty-state-icon i {
    opacity: 0.4;
}

.empty-state-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 8px 0;
}

.empty-state-description {
    font-size: 14px;
    color: var(--text-light);
    margin: 0 0 20px 0;
    line-height: 1.5;
}

.empty-state .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    transition: background var(--transition-speed);
}

.empty-state .btn-primary:hover {
    background: var(--primary-hover);
}

.empty-state-help {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 16px;
}

.empty-state-help i {
    margin-right: 4px;
}

/* ============================================
   SIDEBAR USER SECTION
   ============================================ */
.sidebar-user {
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
    padding-top: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    margin-bottom: 12px;
}

.user-avatar {
    font-size: 36px;
    color: var(--text-light);
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.user-role {
    font-size: 12px;
    color: var(--text-light);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
#main-content {
    margin-top: calc(var(--header-height) + 50px);
    padding: 20px;
    min-height: calc(100vh - var(--header-height) - 100px);
}

/* Messages Container */
.messages-container {
    margin-bottom: 20px;
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: opacity var(--transition-speed);
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.alert-error,
.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    color: #856404;
    border: 1px solid var(--warning-color);
}

.alert-info {
    background: rgba(23, 162, 184, 0.1);
    color: var(--info-color);
    border: 1px solid var(--info-color);
}

.btn-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: inherit;
    padding: 4px;
    opacity: 0.7;
    transition: opacity var(--transition-speed);
}

.btn-close:hover {
    opacity: 1;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

.footer .container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   RESPONSIVE - MOBILE (<768px)
   ============================================ */
@media (max-width: 767px) {
    /* Sidebar plein écran sur mobile */
    .sidebar {
        width: 100%;
        top: 0;
        height: 100vh;
    }

    .breadcrumb-container {
        padding: 8px 12px;
    }

    .breadcrumb-item a,
    .breadcrumb-item button {
        font-size: 13px;
        padding: 2px 4px;
    }

    #main-content {
        padding: 12px;
    }
}

/* ============================================
   RESPONSIVE - TABLET (768px - 1023px)
   ============================================ */
@media (min-width: 768px) and (max-width: 1023px) {
    .sidebar {
        width: var(--sidebar-width);
    }
}

/* ============================================
   RESPONSIVE - DESKTOP (>1024px)
   ============================================ */
@media (min-width: 1024px) {
    /* Masquer hamburger sur desktop */
    .hamburger-btn {
        display: none;
    }

    /* Sidebar fixe à gauche */
    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: auto;
        width: var(--sidebar-width-desktop);
        height: calc(100vh - var(--header-height));
        transform: translateX(0);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.05);
        border-right: 1px solid var(--border-color);
        z-index: 100;
    }

    /* Masquer overlay sur desktop */
    .sidebar-overlay {
        display: none;
    }

    /* Masquer bouton fermeture sur desktop */
    .sidebar-close-btn {
        display: none;
    }

    /* Main content décalé */
    #main-content {
        margin-left: var(--sidebar-width-desktop);
    }

    /* Breadcrumb décalé */
    .breadcrumb-container {
        margin-left: var(--sidebar-width-desktop);
    }

    /* Header adapté */
    .header-container {
        padding-left: calc(var(--sidebar-width-desktop) + 20px);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-light);
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

/* Focus visible (accessibilité) */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}