/* General & Typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #111827; /* Dark charcoal/black for primary actions */
    --primary-hover: #4b5563;
    --secondary-color: #6b7280;
    --background-color: #f9fafb;
    --surface-color: #ffffff;
    --border-color: #e5e7eb;
    --text-color: #111827;
    --muted-text-color: #6b7280;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

* {
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 15px;
    line-height: 1.6;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

.nav-menu a {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    text-decoration: none;
    color: var(--muted-text-color);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    transition: background-color 0.2s, color 0.2s;
}

.nav-menu a:hover:not(.active) {
    background-color: var(--background-color);
    color: var(--text-color);
}

.nav-menu a.active {
    background-color: var(--text-color);
    color: #fff;
    font-weight: 500;
}

.nav-menu a .icon {
    font-size: 1.1em;
    margin-right: 12px;
}

.nav-subsection {
    display: flex;
    flex-direction: column;
    padding-left: 20px;
    margin-bottom: 10px;
}

.nav-subsection label {
    font-size: 12px;
    font-weight: 500;
    color: var(--muted-text-color);
    text-transform: uppercase;
    margin-top: 15px;
    margin-bottom: 5px;
}

.nav-subsection select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--surface-color);
    font-size: 14px;
    color: var(--text-color);
}

.nav-subsection .tag-category-link {
    padding: 8px 12px;
    font-size: 14px;
}

.user-info {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: left;
    font-size: 14px;
}

.user-info span {
    display: block;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--text-color);
}

.user-info a {
    color: var(--muted-text-color);
    text-decoration: none;
    transition: color 0.2s;
}

.user-info a:hover {
    color: var(--text-color);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 30px 40px;
}

.view.hidden {
    display: none;
}

.app-header {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.search-bar {
    flex-grow: 1;
}

.search-bar input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1em;
    background-color: var(--surface-color);
    color: var(--text-color);
    transition: box-shadow 0.2s, border-color 0.2s;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.1);
}

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

.primary-button, .secondary-button {
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.primary-button {
    background-color: var(--primary-color);
    color: #fff;
}

.primary-button:hover {
    background-color: var(--primary-hover);
}

.secondary-button {
    background-color: transparent;
    color: var(--secondary-color);
    border-color: var(--border-color);
}

.secondary-button:hover {
    background-color: var(--background-color);
}

/* Contact List */
.contact-list {
    display: grid;
    gap: 16px;
}

.contact-card {
    background-color: var(--surface-color);
    padding: 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

.contact-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-info h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 18px;
    font-weight: 600;
}

.contact-info p {
    margin: 4px 0 0;
    color: var(--muted-text-color);
    font-size: 14px;
}

.contact-actions button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    color: var(--muted-text-color);
    transition: color 0.2s;
    padding: 8px;
    border-radius: var(--radius-sm);
}

.contact-actions button:hover {
    color: var(--primary-color);
    background-color: var(--background-color);
}

/* Tags */
.tag {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 9999px; /* Pill shape */
    font-size: 12px;
    font-weight: 500;
    margin-right: 6px;
    color: #fff;
    opacity: 0.9;
}

.tag-list {
    display: grid;
    gap: 16px;
}

.tag-card {
    background-color: var(--surface-color);
    padding: 16px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
}

.tag-card .tag-name {
    font-weight: 500;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--surface-color);
    padding: 32px;
    border-radius: var(--radius-lg);
    width: 95%;
    max-width: 680px;
    box-shadow: var(--shadow-md);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeIn 0.3s ease-out;
}

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

.modal-content h2 {
    margin-top: 0;
    padding-bottom: 12px;
    font-size: 24px;
    font-weight: 600;
}

.close-button {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 2em;
    font-weight: 300;
    cursor: pointer;
    color: var(--muted-text-color);
    transition: color 0.2s;
}

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

.modal-content form label {
    display: block;
    margin-top: 16px;
    margin-bottom: 4px;
    font-weight: 500;
    color: var(--text-color);
    font-size: 14px;
}

.modal-content form input,
.modal-content form select,
.modal-content form textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-color);
    font-size: 1em;
    color: var(--text-color);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.modal-content form input:focus,
.modal-content form select:focus,
.modal-content form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.1);
}

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

.modal-content form button {
    margin-top: 24px;
    width: 100%;
}

.tag-input-wrapper {
    display: flex;
    gap: 8px;
    align-items: center;
}

.tag-input-wrapper select {
    flex-grow: 1;
}

.tag-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-color);
}

.tag-pill {
    background-color: var(--surface-color);
    color: var(--text-color);
    padding: 6px 12px;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
    gap: 6px;
    border: 1px solid var(--border-color);
}

.tag-pill .remove-tag {
    cursor: pointer;
    color: var(--muted-text-color);
    font-size: 1.1em;
    transition: color 0.2s;
}

.tag-pill .remove-tag:hover {
    color: #ef4444;
}

.contribution-entry {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--radius-md);
    margin-top: 12px;
    position: relative;
}

.contribution-entry .remove-contribution {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    font-size: 1.5em;
    cursor: pointer;
    color: #ef4444;
}

/* Authentication Pages */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: var(--background-color);
}

.auth-container {
    background-color: var(--surface-color);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.auth-container h2 {
    color: var(--text-color);
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
}

.auth-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-color);
    font-size: 1em;
    color: var(--text-color);
}

.auth-container button {
    width: 100%;
    padding: 12px;
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.auth-container button:hover {
    background-color: var(--primary-hover);
}

.auth-container p {
    margin-top: 16px;
    color: var(--muted-text-color);
}

.auth-container a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}