/**
 * Skill Farm Executive Messaging Dashboard
 * Premium Design with Clear Desktop/Mobile Separation
 */

/* =================================
   CSS VARIABLES & FOUNDATIONS
   ================================= */

:root {
    --cream-primary: #FEFCF6;
    --cream-secondary: #FAF6ED;
    --cream-accent: #F5F0E5;
    --cream-dark: #F0EBE0;
    --green-primary: #1B3B2F;
    --green-secondary: #2D5444;
    --green-accent: #4A7259;
    --green-light: #6B8F6F;
    --gold-primary: #C8A882;
    --gold-secondary: #B8956C;
    --gold-light: #D4C4A8;
    --text-primary: #1A1A1A;
    --text-secondary: #555555;
    --text-tertiary: #888888;
    --border-elegant: #E5DFD0;
    --border-gold: #D4C4A8;
    --shadow-elegant: 0 12px 48px rgba(27, 59, 47, 0.06);
    --shadow-luxury: 0 24px 64px rgba(27, 59, 47, 0.08);
    --shadow-subtle: 0 4px 16px rgba(27, 59, 47, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(180deg, var(--cream-primary) 0%, var(--cream-secondary) 50%, var(--cream-accent) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 300;
    letter-spacing: -0.01em;
    overflow-x: hidden;
}

/* =================================
   DESKTOP LAYOUT (Default)
   ================================= */

.senna-dashboard-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Desktop Left Sidebar */
.senna-desktop-sidebar {
    width: 280px;
    background: rgba(255, 255, 255, 0.95);
    border-right: 1px solid var(--border-elegant);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(24px);
}

.senna-desktop-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-elegant);
}

.senna-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.senna-brand-logo {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 600;
    color: var(--green-primary);
}

.senna-brand-logo-dot {
    color: var(--gold-primary);
}

.senna-brand-name {
    font-family: 'Inter', sans-serif;
    font-size: 18px;
    font-weight: 400;
    color: var(--text-primary);
}

.senna-brand-subtitle {
    font-size: 11px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-left: 36px;
}

/* Desktop Navigation */
.senna-desktop-nav {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.senna-nav-section {
    margin-bottom: 24px;
}

.senna-nav-title {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    font-weight: 500;
}

.senna-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
    margin-bottom: 4px;
    color: var(--text-secondary);
}

.senna-nav-item:hover {
    background: var(--cream-accent);
    color: var(--text-primary);
    transform: translateX(4px);
}

.senna-nav-item.active {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-secondary) 100%);
    color: white;
    box-shadow: var(--shadow-subtle);
}

.senna-nav-icon {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}

.senna-nav-label {
    font-size: 14px;
    font-weight: 400;
}

.senna-nav-count {
    margin-left: auto;
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-secondary) 100%);
    color: white;
    padding: 4px 10px;
    border-radius: 14px;
    font-size: 12px;
    font-weight: 600;
    min-width: 24px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(200, 168, 130, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    letter-spacing: 0.02em;
}

.senna-nav-item.active .senna-nav-count {
    background: linear-gradient(135deg, white 0%, var(--cream-accent) 100%);
    color: var(--green-primary);
    box-shadow: 0 2px 8px rgba(27, 59, 47, 0.2);
    border: 1px solid rgba(200, 168, 130, 0.2);
}

/* Desktop User Section */
.senna-desktop-user {
    padding: 20px;
    border-top: 1px solid var(--border-elegant);
    display: flex;
    align-items: center;
    gap: 12px;
}

.senna-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    overflow: hidden;
}

.senna-user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.senna-user-info {
    flex: 1;
}

.senna-user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.senna-user-title {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Desktop Main Content */
.senna-desktop-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: white;
}

.senna-desktop-message-header {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-elegant);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.senna-message-title {
    font-family: 'Playfair Display', serif;
    font-size: 24px;
    font-weight: 300;
    color: var(--text-primary);
}

.senna-desktop-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.senna-search-container {
    position: relative;
}

.senna-search-input {
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--border-elegant);
    border-radius: 20px;
    width: 300px;
    background: var(--cream-accent);
    font-size: 14px;
}

.senna-search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
}

.senna-compose-btn {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-secondary) 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-compose-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elegant);
}

/* Desktop Messages Area */
.senna-desktop-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 32px;
}

.senna-messages-list {
    display: grid;
    gap: 8px;
}

.senna-message-item {
    background: white;
    border: 1px solid var(--border-elegant);
    border-radius: 12px;
    padding: 16px 20px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
    display: grid;
    grid-template-columns: 48px 1fr auto;
    gap: 16px;
    align-items: center;
}

.senna-message-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elegant);
    border-color: var(--gold-primary);
}

.senna-message-item.unread {
    border-left: 4px solid var(--gold-primary);
    background: linear-gradient(135deg, rgba(200, 168, 130, 0.08) 0%, white 100%);
}

.senna-message-avatar {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    overflow: hidden;
}

.senna-message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.senna-message-content {
    min-width: 0;
}

.senna-message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.senna-message-sender {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.senna-message-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.senna-message-subject {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.senna-message-preview {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.senna-message-actions {
    display: flex;
    gap: 4px;
}

.senna-action-btn {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-elegant);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, transform 0.15s ease;
    color: var(--text-tertiary);
}

.senna-action-btn:hover {
    background: var(--green-primary);
    color: white;
    border-color: var(--green-primary);
    transform: scale(1.1);
}

/* =================================
   MOBILE LAYOUT - COMPLETELY SEPARATE
   ================================= */

.senna-mobile-container {
    display: none;
    flex-direction: column;
    height: 100vh;
    background: var(--cream-primary);
}

/* Mobile Header */
.senna-mobile-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-elegant);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 100;
}

.senna-mobile-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.senna-mobile-logo {
    font-family: 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--green-primary);
}

.senna-mobile-name {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-primary);
}

.senna-mobile-menu-btn {
    width: 40px;
    height: 40px;
    background: var(--cream-accent);
    border: 1px solid var(--border-elegant);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-mobile-menu-btn:hover {
    background: var(--green-primary);
    color: white;
}

/* Mobile Content */
.senna-mobile-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    padding-bottom: 80px;
}

.senna-mobile-search {
    margin-bottom: 16px;
}

.senna-mobile-search input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 1px solid var(--border-elegant);
    border-radius: 16px;
    background: white;
    font-size: 14px;
}

.senna-mobile-messages {
    display: grid;
    gap: 8px;
}

.senna-mobile-message-item {
    background: white;
    border: 1px solid var(--border-elegant);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-mobile-message-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-subtle);
}

.senna-mobile-message-item.unread {
    border-left: 4px solid var(--gold-primary);
}

.senna-mobile-message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.senna-mobile-sender {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.senna-mobile-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.senna-mobile-subject {
    font-size: 15px;
    font-weight: 400;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.senna-mobile-preview {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Mobile Bottom Navigation */
.senna-mobile-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-elegant);
    padding: 8px 0 max(8px, env(safe-area-inset-bottom));
    z-index: 1000;
}

.senna-mobile-nav-items {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 16px;
}

.senna-mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
    color: var(--text-tertiary);
    font-size: 11px;
    min-width: 60px;
    text-align: center;
}

.senna-mobile-nav-item.active {
    color: var(--green-primary);
    background: rgba(27, 59, 47, 0.08);
    transform: translateY(-2px);
}

.senna-mobile-nav-item svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}

/* Mobile Sidebar */
.senna-mobile-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px);
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.15s ease;
    border-right: 1px solid var(--border-elegant);
    box-shadow: var(--shadow-luxury);
    overflow-y: auto;
    padding-top: 70px;
}

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

.senna-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: background 0.15s ease, transform 0.15s ease;
}

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

/* =================================
   SHARED COMPONENTS
   ================================= */

/* Modal */
.senna-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-modal.active {
    opacity: 1;
    visibility: visible;
}

.senna-modal-content {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    backdrop-filter: blur(24px);
    border: 1px solid var(--border-elegant);
    box-shadow: var(--shadow-luxury);
}

.senna-modal-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border-elegant);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.senna-modal-header h2 {
    font-family: 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 300;
    color: var(--green-primary);
}

.senna-modal-close {
    background: transparent;
    border: none;
    font-size: 24px;
    color: var(--text-tertiary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-modal-close:hover {
    background: var(--cream-accent);
    color: var(--text-primary);
}

/* Form */
.senna-form {
    padding: 24px;
}

.senna-form-group {
    margin-bottom: 16px;
}

.senna-form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-weight: 400;
    font-size: 14px;
}

.senna-form-group input,
.senna-form-group select,
.senna-form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-elegant);
    border-radius: 12px;
    font-size: 14px;
    background: var(--cream-accent);
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-form-group input:focus,
.senna-form-group select:focus,
.senna-form-group textarea:focus {
    outline: none;
    border-color: var(--gold-primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(200, 168, 130, 0.15);
}

.senna-form-group textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.5;
}

.senna-form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 20px;
}

.senna-btn-primary {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-secondary) 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elegant);
}

.senna-btn-secondary {
    background: white;
    color: var(--green-primary);
    border: 1px solid var(--border-elegant);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-btn-secondary:hover {
    background: var(--cream-accent);
    border-color: var(--gold-primary);
}

/* =================================
   RESPONSIVE BREAKPOINTS
   ================================= */

/* Hide mobile elements on desktop */
@media (min-width: 769px) {
    .senna-mobile-container,
    .senna-mobile-nav,
    .senna-mobile-sidebar,
    .senna-mobile-overlay,
    .senna-hamburger {
        display: none !important;
    }
}

/* Show mobile layout on mobile */
@media (max-width: 768px) {
    .senna-dashboard-container {
        display: none !important;
    }
    
    .senna-mobile-container {
        display: flex !important;
    }
    
    .senna-mobile-nav {
        display: block !important;
    }
    
    /* Mobile-specific adjustments */
    .senna-modal {
        align-items: flex-end;
        padding: 0;
    }
    
    .senna-modal-content {
        border-radius: 20px 20px 0 0;
        max-width: 100%;
        max-height: 85vh;
    }
    
    .senna-form-actions {
        flex-direction: column;
        gap: 8px;
    }
    
    .senna-btn-primary,
    .senna-btn-secondary {
        width: 100%;
        padding: 14px;
    }
}

/* Message Viewer - Ultra Premium Floating Design */
.senna-message-viewer {
    position: fixed;
    top: 50%;
    right: -700px;
    transform: translateY(-50%);
    width: 680px;
    height: 85vh;
    max-height: 900px;
    background: linear-gradient(145deg,
        rgba(255, 255, 255, 0.92) 0%,
        rgba(254, 252, 246, 0.88) 40%,
        rgba(250, 246, 237, 0.85) 100%);
    backdrop-filter: blur(80px) saturate(200%) brightness(1.05);
    -webkit-backdrop-filter: blur(80px) saturate(200%) brightness(1.05);
    box-shadow: 
        -20px 0 60px rgba(27, 59, 47, 0.08),
        -10px 0 40px rgba(200, 168, 130, 0.06),
        -5px 0 20px rgba(0, 0, 0, 0.04),
        0 0 120px rgba(200, 168, 130, 0.03),
        inset 1px 0 0 rgba(255, 255, 255, 0.6),
        inset -1px 0 0 rgba(200, 168, 130, 0.2);
    z-index: 1000;
    transition: transform 0.2s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: flex;
    flex-direction: column;
    border-radius: 24px 0 0 24px;
    border: 1px solid rgba(200, 168, 130, 0.15);
    border-right: none;
    overflow: hidden;
    margin-right: 20px;
}

.senna-message-viewer.active {
    right: -20px;
    transform: translateY(-50%) scale(1);
}

.senna-message-viewer::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at 30% 30%,
        rgba(200, 168, 130, 0.08) 0%,
        transparent 50%
    );
    animation: floatingGlow 15s ease-in-out infinite;
    pointer-events: none;
}

@keyframes floatingGlow {
    0%, 100% { transform: rotate(0deg) scale(1); opacity: 0.5; }
    50% { transform: rotate(180deg) scale(1.1); opacity: 0.8; }
}

.senna-viewer-header {
    padding: 32px 36px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.98) 0%, 
        rgba(254, 252, 246, 0.95) 50%,
        rgba(250, 246, 237, 0.92) 100%);
    border-bottom: 1px solid rgba(200, 168, 130, 0.18);
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(27, 59, 47, 0.03);
}

.senna-viewer-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    right: -100%;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--gold-primary) 25%,
        var(--gold-light) 50%,
        var(--gold-primary) 75%, 
        transparent 100%);
    opacity: 0.6;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.senna-viewer-back {
    width: 44px;
    height: 44px;
    background: linear-gradient(145deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(254, 252, 246, 0.8) 100%);
    border: 2px solid rgba(200, 168, 130, 0.15);
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 
        0 4px 12px rgba(27, 59, 47, 0.06),
        0 2px 4px rgba(0, 0, 0, 0.03),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.senna-viewer-back::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(27, 59, 47, 0.1) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.senna-viewer-back:hover {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-secondary) 100%);
    color: white;
    border-color: var(--green-primary);
    transform: translateX(-6px) scale(1.05);
    box-shadow: 
        0 8px 24px rgba(27, 59, 47, 0.2),
        0 4px 8px rgba(0, 0, 0, 0.1);
}

.senna-viewer-back:hover::after {
    width: 100px;
    height: 100px;
}

.senna-viewer-title {
    flex: 1;
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 300;
    color: var(--green-primary);
    letter-spacing: -0.02em;
}

.senna-viewer-actions {
    display: flex;
    gap: 10px;
}

.senna-viewer-action {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(200, 168, 130, 0.15);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
}

.senna-viewer-action:hover {
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-secondary) 100%);
    color: white;
    border-color: var(--gold-primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(200, 168, 130, 0.3);
}

.senna-viewer-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 36px 40px;
    background: linear-gradient(180deg, 
        rgba(255, 255, 255, 0.4) 0%, 
        rgba(254, 252, 246, 0.2) 50%,
        rgba(250, 246, 237, 0.1) 100%);
    position: relative;
}

.senna-viewer-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(180deg,
        rgba(255, 255, 255, 0.6) 0%,
        transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.senna-viewer-content::-webkit-scrollbar {
    width: 10px;
}

.senna-viewer-content::-webkit-scrollbar-track {
    background: linear-gradient(180deg,
        rgba(200, 168, 130, 0.03) 0%,
        rgba(200, 168, 130, 0.06) 100%);
    border-radius: 10px;
    margin: 10px 0;
}

.senna-viewer-content::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg,
        rgba(200, 168, 130, 0.4) 0%,
        rgba(200, 168, 130, 0.6) 100%);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
    box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.1);
}

.senna-viewer-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg,
        var(--gold-primary) 0%,
        var(--gold-secondary) 100%);
    box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.15);
}

.senna-viewer-meta {
    margin-bottom: 32px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(200, 168, 130, 0.15);
    position: relative;
}

.senna-viewer-meta::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--gold-primary) 0%, transparent 100%);
}

.senna-viewer-subject {
    font-family: 'Playfair Display', serif;
    font-size: 28px;
    font-weight: 400;
    color: var(--green-primary);
    margin-bottom: 20px;
    line-height: 1.4;
    letter-spacing: -0.02em;
}

.senna-viewer-from {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.6) 0%, 
        rgba(250, 246, 237, 0.4) 100%);
    border-radius: 16px;
    border: 1px solid rgba(200, 168, 130, 0.1);
}

.senna-viewer-avatar {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(27, 59, 47, 0.08);
    border: 2px solid rgba(200, 168, 130, 0.2);
}

.senna-viewer-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.senna-viewer-sender-info {
    flex: 1;
}

.senna-viewer-sender-name {
    font-size: 17px;
    font-weight: 500;
    color: var(--green-primary);
    margin-bottom: 2px;
}

.senna-viewer-sender-email {
    font-size: 14px;
    color: var(--text-tertiary);
    font-style: italic;
}

.senna-viewer-timestamp {
    font-size: 13px;
    color: var(--text-tertiary);
    padding: 6px 12px;
    background: rgba(200, 168, 130, 0.08);
    border-radius: 20px;
    font-weight: 500;
}

.senna-viewer-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-primary);
    padding: 24px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    border: 1px solid rgba(200, 168, 130, 0.08);
    min-height: 200px;
}

.senna-viewer-body p {
    margin-bottom: 18px;
}

.senna-viewer-footer {
    padding: 24px 32px 28px;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.95) 0%, 
        rgba(254, 252, 246, 0.95) 100%);
    border-top: 1px solid rgba(200, 168, 130, 0.25);
    box-shadow: 0 -4px 20px rgba(27, 59, 47, 0.04);
}

.senna-quick-reply {
    display: flex;
    gap: 12px;
}

.senna-reply-input {
    flex: 1;
    padding: 14px 20px;
    background: white;
    border: 2px solid rgba(200, 168, 130, 0.15);
    border-radius: 16px;
    font-size: 14px;
    transition: background 0.15s ease, transform 0.15s ease;
}

.senna-reply-input:focus {
    outline: none;
    border-color: var(--gold-primary);
    background: linear-gradient(135deg, white 0%, var(--cream-accent) 100%);
    box-shadow: 0 0 0 4px rgba(200, 168, 130, 0.1);
}

.senna-reply-send {
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-secondary) 100%);
    color: white;
    border: none;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(27, 59, 47, 0.2);
    letter-spacing: 0.02em;
}

.senna-reply-send:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(27, 59, 47, 0.3);
    background: linear-gradient(135deg, var(--green-secondary) 0%, var(--green-primary) 100%);
}

/* Message Viewer Overlay */
.senna-viewer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: background 0.15s ease, transform 0.15s ease;
}

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

/* Mobile Message Viewer */
@media (max-width: 768px) {
    .senna-message-viewer {
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        right: -100%;
        top: 0;
        transform: translateY(0);
        border-radius: 0;
        margin-right: 0;
    }
    
    .senna-message-viewer.active {
        right: 0;
        transform: translateY(0) scale(1);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.senna-message-item {
    animation: fadeIn 0.4s ease-out;
}

/* Notifications */
.senna-notification {
    position: fixed;
    top: 20px;
    right: -400px;
    max-width: 400px;
    padding: 16px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-elegant);
    font-size: 14px;
    z-index: 10000;
    transition: right 0.15s ease;
    border-left: 4px solid var(--green-primary);
}

.senna-notification.active {
    right: 20px;
}

.senna-notification-success {
    border-left-color: #27AE60;
    background: linear-gradient(135deg, #E8F8F5 0%, white 100%);
}

.senna-notification-error {
    border-left-color: #E74C3C;
    background: linear-gradient(135deg, #FADBD8 0%, white 100%);
}

.senna-notification-info {
    border-left-color: var(--gold-primary);
    background: linear-gradient(135deg, var(--cream-accent) 0%, white 100%);
}

/* Loading States */
.senna-loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-tertiary);
    font-size: 14px;
    font-style: italic;
}

.senna-no-messages {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 16px;
    border: 1px solid var(--border-elegant);
    color: var(--text-secondary);
}

.senna-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    color: #C0392B;
    padding: 12px 16px;
    border-radius: 12px;
    margin: 16px;
    font-size: 14px;
}