/**
 * ShadowCrypt Zero - Styles
 * Dark theme with neon accents (Cyan for active, Amber for warnings)
 */

/* ===== CSS Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --bg-hover: #4a4a4a;

    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;

    --accent-cyan: #00bcd4;
    --accent-cyan-dark: #0097a7;
    --accent-cyan-light: #4dd0e1;

    --accent-amber: #ffc107;
    --accent-amber-dark: #ff9800;
    --accent-red: #f44336;
    --accent-green: #4caf50;

    --border-color: #404040;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-mono: 'Roboto Mono', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.mono {
    font-family: var(--font-mono);
}

.text-cyan { color: var(--accent-cyan); }
.text-amber { color: var(--accent-amber); }
.text-green { color: var(--accent-green); }
.text-red { color: var(--accent-red); }
.text-muted { color: var(--text-muted); }

/* ===== Layout ===== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ===== Navigation ===== */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--accent-green);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.fingerprint-display {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== Side Menu ===== */
.side-menu {
    width: 250px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    flex-shrink: 0;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

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

.menu-item.active {
    background-color: var(--bg-tertiary);
    color: var(--accent-cyan);
    border-left-color: var(--accent-cyan);
}

.menu-icon {
    font-size: 1.25rem;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

/* ===== Cards ===== */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

/* ===== Identity Gate (Login) ===== */
.identity-gate {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-primary) 0%, #252525 100%);
}

.identity-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 800px;
    width: 100%;
}

.identity-card {
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.identity-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.identity-card-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.identity-card h2 {
    margin-bottom: var(--spacing-sm);
}

.identity-card p {
    color: var(--text-secondary);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-cyan {
    background-color: var(--accent-cyan);
    color: #000;
}

.btn-cyan:hover:not(:disabled) {
    background-color: var(--accent-cyan-dark);
}

.btn-amber {
    background-color: var(--accent-amber);
    color: #000;
}

.btn-amber:hover:not(:disabled) {
    background-color: var(--accent-amber-dark);
}

.btn-red {
    background-color: var(--accent-red);
    color: #fff;
}

.btn-red:hover:not(:disabled) {
    background-color: #d32f2f;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-cyan);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* ===== Drop Zones ===== */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-cyan);
    background-color: var(--bg-tertiary);
}

.drop-zone-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-muted);
}

.drop-zone-text {
    color: var(--text-secondary);
}

/* ===== Contact List ===== */
.contact-list {
    max-height: 400px;
    overflow-y: auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.contact-item:hover {
    border-color: var(--accent-cyan);
}

.contact-item.active {
    border-color: var(--accent-cyan);
    background-color: rgba(0, 188, 212, 0.1);
}

.contact-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.contact-info {
    flex: 1;
}

.contact-name {
    font-weight: 500;
    color: var(--text-primary);
}

.contact-fingerprint {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.contact-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-muted);
}

.contact-status.online {
    background-color: var(--accent-green);
}

/* ===== Chat Interface ===== */
.chat-container {
    display: flex;
    height: calc(100vh - 200px);
    gap: var(--spacing-lg);
}

.chat-contacts {
    width: 280px;
    flex-shrink: 0;
}

.chat-window {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.message-bubble {
    max-width: 70%;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    position: relative;
}

.message-bubble.sent {
    background-color: var(--accent-cyan);
    color: #000;
    margin-left: auto;
}

.message-bubble.received {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.message-bubble .timer {
    position: absolute;
    bottom: -20px;
    right: 0;
    font-size: 0.75rem;
    color: var(--accent-amber);
}

.chat-input-area {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.chat-timer {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.chat-timer input[type="range"] {
    flex: 1;
}

/* ===== Steganography ===== */
.stego-preview {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.stego-preview-item {
    flex: 1;
    min-width: 200px;
}

.stego-preview-image {
    width: 100%;
    max-height: 200px;
    object-fit: contain;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

/* ===== Hash Display ===== */
.hash-display {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    word-break: break-all;
    margin-bottom: var(--spacing-sm);
}

.hash-match {
    color: var(--accent-green);
}

.hash-mismatch {
    color: var(--accent-red);
}

/* ===== QR Code ===== */
.qr-code {
    display: inline-block;
    padding: var(--spacing-lg);
    background-color: #fff;
    border-radius: var(--radius-md);
}

.qr-code img {
    display: block;
    max-width: 200px;
    max-height: 200px;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.modal {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-close:hover {
    color: var(--text-primary);
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-width: 350px;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    border-left: 4px solid var(--accent-green);
}

.toast-warning {
    border-left: 4px solid var(--accent-amber);
}

.toast-error {
    border-left: 4px solid var(--accent-red);
}

.toast-info {
    border-left: 4px solid var(--accent-cyan);
}

/* ===== Loading Spinner ===== */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.spinner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ===== Toggle Switch ===== */
.toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 26px;
    transition: all 0.3s ease;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.toggle input:checked + .toggle-slider {
    background-color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.toggle input:checked + .toggle-slider:before {
    transform: translateX(24px);
    background-color: #000;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }

    .side-menu {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-md) 0;
    }

    .menu-item {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    .menu-text {
        display: inline;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .chat-container {
        flex-direction: column;
        height: auto;
    }

    .chat-contacts {
        width: 100%;
        max-height: 200px;
    }

    .chat-window {
        height: 400px;
    }

    .top-nav {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .fingerprint-display {
        font-size: 0.75rem;
        max-width: 150px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== Utility Classes ===== */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.mt-auto { margin-top: auto; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.w-full { width: 100%; }