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

html {
    scroll-behavior: smooth;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-base);
    font-weight: var(--font-weight-normal);
    background: var(--color-bg-light);
    color: var(--color-text);
    height: 100%;
    overflow: hidden;
}

.container {
    width: 100%;
    height: 100vh;
    background: var(--color-bg-lighter);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.header {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-section);
    box-shadow: 0 2px 10px var(--color-primary-shadow-20);
    position: sticky;
    top: 0;
    z-index: 100;
    text-align: center;
}

.header h1 {
    font-size: var(--font-lg);
    margin: 0;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.5px;
}

.header .subtitle {
    font-size: var(--font-sm);
    opacity: 0.9;
    font-weight: var(--font-weight-light);
    margin-top: 4px;
}

.main-content {
    flex: 1;
    padding: var(--spacing-section);
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
    flex-shrink: 0;
}

.toolbar h2 {
    font-size: var(--font-lg);
    color: var(--color-text);
    margin: 0;
}

.toolbar .btn {
    width: auto;
}

.form-wrapper {
    width: 100%;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--color-text);
    font-size: var(--font-sm);
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-shadow-10);
}

.form-group input::placeholder {
    color: var(--color-text-muted);
}

.help-text {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

.btn {
    padding: var(--btn-padding-y) var(--btn-padding-x);
    border: none;
    border-radius: var(--btn-radius);
    font-size: var(--btn-font-size);
    font-weight: var(--btn-font-weight);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary .btn-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--color-primary-alpha);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-bg-light);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: var(--btn-padding-y) var(--btn-padding-x);
    font-size: var(--btn-font-size);
    width: auto;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px var(--color-primary-alpha);
}

.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
}

.result-container {
    margin-top: 24px;
    opacity: 1;
    max-height: 500px;
    overflow: visible;
    animation: slideDown 0.4s ease-out;
}

.result-container.hidden {
    display: none;
}

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

.result-card {
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-url {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border-soft);
    border-radius: 8px;
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    word-break: break-all;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.result-url:hover {
    background: var(--color-bg-card);
}

.message-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1100;
    max-width: 400px;
    width: calc(100% - 40px);
}

.message {
    padding: 16px 20px;
    border-radius: 8px;
    font-size: var(--font-sm);
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid;
    margin-bottom: 10px;
    box-shadow: 0 4px 12px var(--color-black-15);
    background: var(--color-bg-white);
}

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

.message.success {
    background: var(--color-success-bg);
    color: var(--color-success-text);
    border-left-color: var(--color-success);
}

.message.error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
    border-left-color: var(--color-primary);
}

.message.info {
    background: var(--color-info-bg);
    color: var(--color-info-text);
    border-left-color: var(--color-info);
}

.stats-section {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.stats-section h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--color-text);
}

.stats-section.hidden {
    display: none;
}

.links-section {
    width: 100%;
    flex: 1;
    position: relative;
    overflow: hidden;
}

.links-section::before,
.links-section::after {
    content: '';
    position: absolute;
    left: 0;
    right: 20px;
    height: 30px;
    pointer-events: none;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.links-section::before {
    top: 0;
    background: linear-gradient(to bottom, var(--color-bg-lighter) 0%, transparent 100%);
}

.links-section::after {
    bottom: 0;
    background: linear-gradient(to top, var(--color-bg-lighter) 0%, transparent 100%);
}

.links-section-scroll {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 10px;
    display: flex;
    flex-direction: column;
}

.links-section-scroll::-webkit-scrollbar {
    width: 8px;
}

.links-section-scroll::-webkit-scrollbar-track {
    background: var(--color-bg-lighter);
    border-radius: 10px;
}

.links-section-scroll::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 10px;
}

.links-section-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

.links-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
    flex: 1;
    justify-content: flex-start;
}

.link-item {
    background: var(--color-bg-white);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    transition: all 0.3s ease;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.link-item.inactive {
    background: var(--color-bg-light);
}

.link-item-info {
    flex: 1;
    min-width: 0;
}

.link-item-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.link-item-code {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.link-item-status {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.link-item-status.active {
    background: var(--color-success-bg);
    color: var(--color-success-text);
}

.link-item-status.inactive {
    background: var(--color-error-bg);
    color: var(--color-error-text);
}

.link-item-url {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    word-break: break-all;
    margin-bottom: 12px;
    line-height: 1.5;
}

.link-item-url a {
    color: inherit;
    text-decoration: none;
}

.link-item-url a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.link-item-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.link-item-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.short-link-copy {
    cursor: pointer;
    padding: 6px 12px;
    background: var(--color-bg-lighter);
    border-radius: 6px;
    transition: all 0.2s ease;
    user-select: none;
    font-weight: 500;
    color: var(--color-primary);
}

.short-link-copy:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--color-primary-shadow-30);
}

.short-link-copy:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px var(--color-primary-shadow-30);
}

.short-link-copy .copy-icon {
    font-size: 1rem;
    transition: transform 0.2s ease;
}

.short-link-copy:hover .copy-icon {
    transform: scale(1.1);
}

.link-item-actions {
    display: flex;
    margin: auto 0;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
    min-width: 140px;
}

.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: var(--btn-sm-padding-y) var(--btn-sm-padding-x);
    border: 2px solid var(--color-border);
    border-radius: var(--btn-radius);
    background: var(--color-bg-white);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--btn-sm-font-size);
    font-weight: var(--btn-font-weight);
    white-space: nowrap;
    width: 100%;
}

.btn-action .btn-icon {
    font-size: 1.1rem;
    line-height: 1;
}

.btn-action .btn-label {
    line-height: 1;
}

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

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

.btn-action.btn-activate {
    color: var(--color-success);
    border-color: var(--color-success);
}

.btn-action.btn-activate:hover {
    background: var(--color-success);
    color: white;
}

.btn-action.btn-deactivate {
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.btn-action.btn-deactivate:hover {
    background: var(--color-warning);
    color: white;
}

.btn-action.btn-delete {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    flex: 1;
    width: 100%;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.empty-state-subtext {
    font-size: var(--font-sm);
    color: var(--color-text-muted);
}

.footer {
    background: var(--color-bg-light);
    color: var(--color-text-secondary);
    padding: var(--spacing-section);
    text-align: center;
    font-size: 0.9rem;
    border-top: 1px solid var(--color-border);
}

.btn.loading {
    pointer-events: none;
}

.btn.loading .btn-text::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid var(--color-white-30);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.6s linear infinite;
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-black-60);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal-content {
    background: var(--color-bg-white);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown 0.3s ease-out;
    box-shadow: 0 20px 60px var(--color-black-30);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    border-bottom: 2px solid var(--color-border);
}

.modal-header h3 {
    font-size: 1.5rem;
    color: var(--color-text);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-text-muted);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--color-bg-light);
    color: var(--color-text);
}

.modal-body {
    padding: 30px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

.modal-actions .btn {
    width: auto;
    min-width: 100px;
}

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

.text-muted {
    color: var(--color-text-muted);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
}

.checkbox-row input[type="checkbox"] {
    display: none;
}

.checkbox-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
    font-size: 0.95rem;
    color: var(--color-text);
    font-weight: 400;
    margin: 0;
}

.checkbox-row input[type="checkbox"] + label::before {
    content: '';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-primary);
    border-radius: 4px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    color: white;
}

.checkbox-row input[type="checkbox"]:checked + label::before {
    font-family: 'MARSO' !important;
    content: '\f00c';
    background: var(--color-primary);
    border-color: var(--color-primary);
    font-size: 1rem;
}

.checkbox-row label:hover::before {
    box-shadow: 0 2px 8px var(--color-primary-shadow-30);
    transform: translateY(-2px);
}

/* Toolbar actions */
.toolbar-actions {
    display: flex;
    gap: 12px;
}

.btn-help {
    width: 50px !important;
    height: 50px;
    padding: 0 !important;
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: var(--btn-radius);
}

.btn-help i {
    font-size: 1.8rem;
    line-height: 1;
}

/* ============================================
   TUTORIAL MODAL
   ============================================ */

.modal-fullscreen {
    background: var(--color-black-90);
    animation: fadeIn 0.3s ease-out;
}

.modal-fullscreen-content {
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    border-radius: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: none;
}

.modal-fullscreen-header {
    background: var(--color-primary);
    color: white;
    border-bottom: none;
    padding: 20px 30px;
    flex-shrink: 0;
}

.modal-fullscreen-header h2 {
    font-size: 2rem;
    color: white;
    margin: 0;
}

.modal-fullscreen-header .modal-close {
    color: white;
    background: var(--color-white-10);
}

.modal-fullscreen-header .modal-close:hover {
    background: var(--color-white-20);
    color: white;
}

.modal-fullscreen-body {
    overflow-y: auto;
    flex: 1;
    padding: 40px;
    background: var(--color-bg-white);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.tutorial-card {
    background: var(--color-bg-white);
    border: 2px solid var(--color-border);
    border-radius: 12px;
    padding: 24px;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    box-shadow: var(--shadow-sm);
}

.tutorial-card:nth-child(2) {
    flex-direction: row;
    align-items: center;
}

.tutorial-card h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin: 16px 0 12px 0;
    font-weight: var(--font-weight-semibold);
}

.tutorial-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
    margin: 0;
}
.tutorial-card p strong {
    font-weight: var(--font-weight-semibold);
}

.tutorial-card-media {
    gap: 16px;
}

.tutorial-image {
    width: 100%;
    flex-shrink: 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    background: var(--color-bg-light);
}

.tutorial-card:nth-child(2) .tutorial-image {
    width: 30%;
}

.tutorial-image img {
    display: block;
    width: 100%;
    height: auto;
}

.tutorial-caption {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    justify-content: flex-start;
}

.tutorial-card:nth-child(2) .tutorial-caption {
    width: 60%;
    justify-content: center;
}

.modal-fullscreen .modal-close i {
    font-size: 1.5rem;
}

.tutorial-list {
    list-style: disc;
    padding-left: 1.2em;
    margin: 12px 0 0 0;
}

.tutorial-list li {
    padding: 6px 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.tutorial-list li::marker {
    color: var(--color-primary);
    font-weight: bold;
    font-size: 1.15em;
}

.tutorial-list strong {
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.tutorial-list i {
    font-size: 1rem;
    line-height: 1;
    vertical-align: -0.1em;
    margin-right: 0.25em;
}

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

@media (max-width: 768px) {
    .modal-fullscreen-body {
        padding: 24px;
    }

    .modal-fullscreen-header {
        padding: 16px 20px;
    }

    .modal-fullscreen-header h2 {
        font-size: 1.5rem;
    }

    .tutorial-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tutorial-card {
        padding: 16px;
    }

    .tutorial-card:nth-child(2) {
        flex-direction: column;
        align-items: flex-start;
    }

    .tutorial-card:nth-child(2) .tutorial-image,
    .tutorial-card:nth-child(2) .tutorial-caption {
        width: 100%;
    }
    
    .btn-help {
        width: 44px;
        height: 44px;
    }
    
    .btn-help i {
        font-size: 1.5rem;
    }
}

@media (max-width: 600px) {
    .header {
        padding: 20px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .header .subtitle {
        font-size: 0.85rem;
    }

    .main-content {
        padding: 20px;
    }

    .toolbar {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }

    .toolbar .btn {
        width: 100%;
    }

    .form {
        gap: 20px;
    }

    .links-section-scroll {
        padding-right: 5px;
    }

    .links-section-scroll::-webkit-scrollbar {
        width: 5px;
    }

    .link-item {
        flex-direction: column;
        align-items: stretch;
    }

    .link-item-actions {
        width: 100%;
        min-width: auto;
    }
}