:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --background-color: #f5f6fa;
    --border-color: #dcdde1;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --warning-color: #f1c40f;
    --nav-height: 80px;
    --footer-height: 60px;
    --modal-z-index: 1000;
    --transition-speed: 0.3s;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-color);
}

/* Navigation */
.navbar {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 100;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 100%;
    display: flex;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--nav-height) + 2rem) 1rem 2rem;
    min-height: calc(100vh - var(--nav-height) - var(--footer-height));
}

.dashboard-intro {
    margin-bottom: 2rem;
}

.dashboard-intro h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.dashboard-intro p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Toolbar */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: center;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    flex: 1;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: white;
    cursor: pointer;
    transition: all var(--transition-speed);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    background-color: var(--background-color);
}

.filter-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.count {
    background-color: rgba(0,0,0,0.1);
    padding: 0.1rem 0.4rem;
    border-radius: 10px;
    font-size: 0.8rem;
}

.search-container {
    position: relative;
    flex: 1;
    min-width: 200px;
}

#searchInput {
    width: 100%;
    padding: 0.5rem 2rem 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.search-reset {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.search-reset.visible {
    opacity: 1;
}

/* Table */
.table-wrapper {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--background-color);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    position: relative;
}

th:hover {
    background-color: var(--border-color);
}

.sort-icon {
    opacity: 0.5;
    margin-left: 0.5rem;
}

.symbol-cell {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.symbol {
    font-weight: 600;
    color: var(--primary-color);
}

.company-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background-color: white;
    padding: 1rem;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.footer-link:hover {
    color: var(--accent-color);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: var(--modal-z-index);
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: white;
    margin: auto;
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

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

.form-group label {
    position: absolute;
    left: 0.75rem;
    top: 0.75rem;
    color: var(--text-secondary);
    transition: all var(--transition-speed);
    pointer-events: none;
}

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

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -1.5rem;
    left: 0;
    font-size: 0.8rem;
    color: var(--accent-color);
}

.error-message {
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: 0.25rem;
    display: block;
}

.form-group.error input,
.form-group.error textarea {
    border-color: var(--error-color);
}

button[type="submit"] {
    background-color: var(--accent-color);
    color: white;
    padding: 0.75rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color var(--transition-speed);
}

button[type="submit"]:hover {
    background-color: var(--secondary-color);
}

button[type="submit"]:disabled {
    background-color: var(--text-secondary);
    cursor: not-allowed;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Success Message */
.success-message {
    text-align: center;
    padding: 2rem;
}

.success-message h3 {
    color: var(--success-color);
    margin-bottom: 1rem;
}

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

    .filter-buttons {
        width: 100%;
    }

    .search-container {
        width: 100%;
    }

    th, td {
        padding: 0.75rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}