/* ==========================================================================
   SwiftShare - Premium SaaS Chat & Calling Application Stylesheet
   Aesthetic: Ultra-Modern Glassmorphism & Cyberpunk Dark Minimalism
   ========================================================================== */

/* --- 1. Design Tokens & CSS Variables --- */
:root {
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Premium Color Palette */
    --bg-dark: #050914;
    --bg-surface: #0a1128;
    --bg-sidebar: #0d1530;
    --accent-glow-1: #00f2fe;
    --accent-glow-2: #4facfe;
    --accent-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --accent-gradient-hover: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-info: #3b82f6;
    
    /* Typography Palette */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Glassmorphism Configuration */
    --glass-bg: rgba(10, 17, 40, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-glow: rgba(0, 242, 254, 0.25);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    
    /* Dimensions & Utility */
    --radius-lg: 24px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --sidebar-width: 380px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- 2. Core Resets & Global Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden; /* Prevents whole page scrolling */
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* --- 3. Utility Classes --- */
.hidden { display: none !important; }
.hidden-form { display: none !important; }
.full-width { width: 100% !important; }
.margin-top { margin-top: 16px !important; }

/* --- 4. Ambient Glowing Background --- */
.glow-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
    background: radial-gradient(circle at 50% 50%, #081024 0%, var(--bg-dark) 100%);
}

.blob {
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    animation: floatingGlow 15s infinite alternate ease-in-out;
}

.blob-1 { top: -20%; left: -10%; }
.blob-2 { bottom: -20%; right: -10%; animation-delay: 5s; background: radial-gradient(circle, rgba(79, 172, 254, 0.08) 0%, transparent 70%); }

@keyframes floatingGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(60px, 40px) scale(1.1); }
}

/* Glass Panel Base */
.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* --- 5. Authentication Screen (Login / Signup) --- */
.auth-wrapper {
    display: none;
    width: 100vw; height: 100vh;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.auth-wrapper.active {
    display: flex;
}

.auth-card {
    width: 100%;
    max-width: 460px;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    text-align: center;
}

.auth-header {
    margin-bottom: 32px;
}

.auth-header .logo-icon {
    width: 48px; height: 48px;
    margin-bottom: 16px;
}

.auth-header h1 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group {
    text-align: left;
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-container input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 15px;
    transition: var(--transition-smooth);
    outline: none;
}

.input-container input:focus {
    border-color: var(--accent-glow-1);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.15);
    background: rgba(0, 0, 0, 0.4);
}

.auth-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 24px;
    margin-top: -10px;
}

.auth-actions a, .auth-switch a {
    font-size: 13px;
    color: var(--accent-glow-1);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.auth-actions a:hover, .auth-switch a:hover {
    color: var(--accent-glow-2);
    text-decoration: underline;
}

.auth-switch {
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* Profile Photo Picker */
.profile-pic-picker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.pic-preview {
    width: 80px; height: 80px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.3);
    border: 2px dashed var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    overflow: hidden;
    background-size: cover;
    background-position: center;
}

.pic-preview svg { width: 32px; height: 32px; }

.upload-btn {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-glow-1);
    cursor: pointer;
    padding: 6px 12px;
    border: 1px solid var(--glass-border-glow);
    border-radius: var(--radius-sm);
    background: rgba(0, 242, 254, 0.05);
    transition: var(--transition-smooth);
}

.upload-btn:hover {
    background: rgba(0, 242, 254, 0.15);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 600;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #000;
}
.btn-primary:hover {
    background: var(--accent-gradient-hover);
    transform: translateY(-2px);
}
.btn-glow:hover {
    box-shadow: 0 8px 24px rgba(0, 242, 254, 0.35);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-glow-1);
}

/* --- 6. Main Application Layout (WhatsApp Style) --- */
.app-layout {
    display: flex;
    width: 100vw;
    height: 100vh;
    padding: 20px;
    gap: 20px;
    max-width: 1600px;
    margin: 0 auto;
}

.app-layout.active {
    display: flex;
}

/* Avatar Utilities */
.avatar {
    width: 44px; height: 44px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--bg-surface);
    border: 1px solid var(--glass-border);
}

.icon-btn {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.icon-btn svg { width: 20px; height: 20px; }

/* --- 7. Sidebar (Left Panel) --- */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--glass-border);
}

.my-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.my-info h3 {
    font-size: 15px;
    font-weight: 600;
}

.my-status {
    font-size: 12px;
    color: var(--color-success);
    font-weight: 500;
}

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

/* Search Container */
.search-container {
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
}

.search-wrapper {
    position: relative;
    width: 100%;
}

.search-wrapper input {
    width: 100%;
    padding: 12px 16px 12px 42px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition-smooth);
}

.search-wrapper input:focus {
    border-color: var(--accent-glow-1);
    background: rgba(0, 0, 0, 0.5);
}

.search-icon {
    position: absolute;
    left: 14px; top: 50%;
    transform: translateY(-50%);
    width: 18px; height: 18px;
    color: var(--text-muted);
}

/* Contact List */
.contact-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.empty-state-list {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 14px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.chat-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.chat-item.active-chat-item {
    background: rgba(0, 242, 254, 0.1);
    border-color: var(--glass-border-glow);
}

.chat-item-info {
    flex: 1;
    overflow: hidden;
}

.chat-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.chat-item-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.chat-item-time {
    font-size: 11px;
    color: var(--text-muted);
}

.chat-item-last-msg {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* --- 8. Chat Window (Right Panel) --- */
.chat-area {
    flex: 1;
    height: 100%;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    position: relative;
}

/* Idle State */
.idle-view {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.idle-graphic svg {
    width: 64px; height: 64px;
    margin-bottom: 20px;
    color: var(--accent-glow-1);
    opacity: 0.5;
}

.idle-view h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.idle-view p {
    font-size: 15px;
    line-height: 1.6;
}

/* Active Chat Interface */
.active-chat {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--glass-border);
}

.chat-peer-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.peer-details h3 {
    font-size: 16px;
    font-weight: 600;
}

.status-indicator {
    font-size: 12px;
    color: var(--accent-glow-1);
}

.chat-actions {
    display: flex;
    gap: 8px;
}

.call-btn {
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-glow-1);
    border: 1px solid var(--glass-border-glow);
}

.call-btn:hover {
    background: var(--accent-gradient);
    color: #000;
}

/* Message Board */
.messages-board {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: rgba(0, 0, 0, 0.1);
}

.msg-wrapper {
    max-width: 75%;
    display: flex;
    flex-direction: column;
}

.msg-wrapper.incoming { align-self: flex-start; }
.msg-wrapper.outgoing { align-self: flex-end; }

.msg-bubble {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14.5px;
    line-height: 1.5;
    word-break: break-word;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.incoming .msg-bubble {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-top-left-radius: 4px;
}

.outgoing .msg-bubble {
    background: var(--accent-gradient);
    color: #000;
    font-weight: 500;
    border-top-right-radius: 4px;
}

.msg-time {
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 4px;
    align-self: flex-end;
}

.outgoing .msg-time { color: rgba(0,0,0,0.6); }

/* Input Dock */
.input-dock {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    padding: 16px 24px;
    background: rgba(0, 0, 0, 0.25);
    border-top: 1px solid var(--glass-border);
}

.attachment-wrapper { position: relative; }

.attach-btn {
    width: 44px; height: 44px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
}

.input-dock textarea {
    flex: 1;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 15px;
    outline: none;
    resize: none;
    max-height: 120px;
    min-height: 44px;
    transition: var(--transition-smooth);
}

.input-dock textarea:focus {
    border-color: var(--accent-glow-1);
}

.send-btn {
    width: 44px; height: 44px;
    border-radius: var(--radius-md);
    background: var(--accent-gradient);
    border: none;
    color: #000;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
}
.send-btn svg { width: 20px; height: 20px; margin-left: -2px; }

/* --- 9. Call Modal & Interfaces --- */
.call-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.call-container {
    width: 90vw; max-width: 1000px;
    height: 80vh; max-height: 700px;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    padding: 24px;
    position: relative;
}

.call-container h2 {
    text-align: center;
    margin-bottom: 20px;
    font-weight: 500;
}

.video-grid {
    flex: 1;
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: center;
    position: relative;
}

.video-box {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 1px solid var(--glass-border);
}

.video-box.remote {
    width: 100%; height: 100%;
}

.video-box.local {
    position: absolute;
    bottom: 20px; right: 20px;
    width: 200px; height: 150px;
    z-index: 10;
}

video {
    width: 100%; height: 100%;
    object-fit: cover;
}

.video-label {
    position: absolute;
    bottom: 10px; left: 10px;
    background: rgba(0,0,0,0.6);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    backdrop-filter: blur(4px);
}

.call-controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 24px;
}

.ctrl-btn {
    width: 56px; height: 56px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.ctrl-btn:hover { background: rgba(255, 255, 255, 0.2); }
.ctrl-btn svg { width: 24px; height: 24px; }
.ctrl-btn.danger { background: var(--color-danger); }
.ctrl-btn.danger:hover { background: var(--color-danger-hover); box-shadow: 0 0 20px rgba(239, 68, 68, 0.5); }

/* Incoming Call Alert */
.incoming-alert {
    position: fixed;
    top: 40px; right: 40px;
    width: 320px;
    padding: 20px;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    z-index: 1001;
    box-shadow: 0 15px 40px rgba(0,0,0,0.6);
    border: 1px solid var(--glass-border-glow);
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.incoming-alert .avatar {
    width: 64px; height: 64px;
    margin-bottom: 12px;
}

.caller-info h4 { font-size: 18px; margin-bottom: 4px; }
.caller-info p { font-size: 13px; color: var(--accent-glow-1); margin-bottom: 20px; }

.incoming-actions {
    display: flex;
    gap: 12px;
    width: 100%;
}

.btn-accept, .btn-reject {
    flex: 1;
    padding: 10px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
}

.btn-accept { background: var(--color-success); color: #fff; }
.btn-reject { background: var(--color-danger); color: #fff; }

/* --- 10. Responsive Design --- */
@media (max-width: 900px) {
    .app-layout { padding: 0; gap: 0; }
    .sidebar { border-radius: 0; width: 320px; border-right: 1px solid var(--glass-border); }
    .chat-area { border-radius: 0; }
}

@media (max-width: 768px) {
    .app-layout { position: relative; }
    .sidebar { width: 100%; position: absolute; z-index: 10; background: var(--bg-dark); }
    /* Logic in JS will add a class to hide sidebar when chat is active on mobile */
    .sidebar.hide-on-mobile { display: none; }
    .video-box.local { width: 120px; height: 160px; bottom: 10px; right: 10px; }
}