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

:root {
    --primary: #0D72B9;
    --primary-hover: #0a5a94;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-900: #111827;
    --white: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--gray-900);
    min-height: 100vh;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

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

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.btn-tiny {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

/* Home page */
.home-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--white);
}

.logo-wrapper {
    text-align: center;
}

.logo {
    max-width: 300px;
    height: auto;
}

/* Login page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--gray-100);
}

.login-box {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
}

.login-logo {
    display: block;
    margin: 0 auto 2.5rem;
    max-width: 300px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 1rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 114, 185, 0.1);
}

.login-box .btn {
    width: 100%;
    padding: 0.75rem;
    margin-top: 0.5rem;
}

.error-message {
    background: #fef2f2;
    color: var(--danger);
    padding: 0.75rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    text-align: center;
}

/* App Layout */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2.5rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    flex-shrink: 0;
}

.top-bar-logo {
    width: 145px;
    height: auto;
}

.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Content area h1 */
.banner-content h1 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.create-directory-form {
    margin-bottom: 2rem;
}

.form-inline {
    display: flex;
    gap: 0.5rem;
}

.form-inline input {
    flex: 1;
    max-width: 300px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
}

.directory-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.directory-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

.directory-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--gray-900);
    font-weight: 500;
}

.directory-link:hover {
    color: var(--primary);
}

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

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

.deep-link {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-family: monospace;
}

.inline-form {
    display: inline;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-500);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.folder-nav {
    flex: 1;
    overflow-y: auto;
    padding: 30px 0 0.5rem 0;
}

.nav-group {
    margin-bottom: 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    color: var(--gray-700);
    text-decoration: none;
    font-size: 1rem;
    cursor: pointer;
}

.nav-item-label {
    flex: 1;
}

.nav-item:hover {
    background: var(--gray-100);
}

.nav-item.active {
    color: var(--primary);
    font-weight: 500;
}

.nav-item.active .nav-item-label {
    color: var(--primary);
}

.nav-count {
    font-size: 0.75rem;
    color: var(--gray-300);
    font-weight: 400;
}

.nav-arrow {
    font-size: 0.625rem;
    color: var(--gray-500);
    transition: transform 0.2s;
}

.nav-arrow.open {
    transform: rotate(180deg);
}

.nav-children {
    display: none;
}

.nav-children.open {
    display: block;
}

.sidebar-admin {
    padding: 1rem;
    border-top: 1px solid var(--gray-200);
}

.sidebar-admin hr {
    display: none;
}

.sidebar-form {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.sidebar-form input[type="text"],
.sidebar-form input[type="file"] {
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    font-size: 0.75rem;
}

/* Banner content */
.banner-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.banner-display {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: flex-start;
}

.banner-item-natural {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
}

.banner-item-natural iframe,
.banner-item-natural video {
    display: block;
}

.banner-item-natural img {
    display: block;
    max-width: 100%;
    height: auto;
}

.banner-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
}

.banner-name {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-family: monospace;
}

.btn-refresh {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--gray-500);
    padding: 0.25rem;
    line-height: 1;
    border-radius: 4px;
}

.btn-refresh:hover {
    color: var(--primary);
    background: var(--gray-100);
}

/* Icon buttons */
.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0.25rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    border-radius: 4px;
    font-size: 0.75rem;
}

.btn-icon:hover {
    color: var(--primary);
    background: var(--gray-100);
}

/* 404 page */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    gap: 1rem;
}

.error-container h1 {
    font-size: 4rem;
    color: var(--gray-300);
}

.error-container p {
    color: var(--gray-500);
}

/* Copy button */
.btn-copy {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    padding: 0.25rem;
    line-height: 1;
    display: inline-flex;
    align-items: center;
}

.btn-copy:hover {
    color: var(--primary);
}

/* Deep link with copy */
.deep-link-copy {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
    color: var(--gray-500);
    font-size: 0.75rem;
    font-family: monospace;
}

.deep-link-copy:hover {
    color: var(--primary);
}

.deep-link-copy:hover .deep-link-text,
.deep-link-copy:hover .deep-link-icon {
    color: var(--primary);
}

.deep-link-text {
    color: inherit;
}

.deep-link-icon {
    color: inherit;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: var(--gray-900);
}

.modal-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

/* Unextracted ZIP placeholder */
.unextracted-zip .zip-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: 8px;
    min-width: 200px;
    min-height: 150px;
}

.zip-placeholder .zip-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.zip-placeholder .zip-name {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-family: monospace;
    text-align: center;
    word-break: break-all;
}