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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 20px;
    box-shadow: 0 20px 40px var(--shadow);
}

header h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #fff 0%, #e0e7ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
}

/* Add Idea Section */
.add-idea-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px var(--shadow);
    border: 1px solid var(--border);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 15px 20px;
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

textarea {
    resize: vertical;
    font-family: inherit;
}

.button-group {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

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

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.2rem;
}

/* Filter Section */
.filter-section {
    margin-bottom: 30px;
}

.search-box input {
    width: 100%;
    padding: 15px 20px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 15px;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-filter {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.tag-filter:hover,
.tag-filter.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    padding: 25px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

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

/* Ideas Grid */
.ideas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.idea-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.idea-card.completed {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.1) 100%);
    border-color: var(--success);
}

.idea-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.idea-card.completed::before {
    background: linear-gradient(90deg, var(--success) 0%, #059669 100%);
    transform: scaleX(1);
}

.idea-card:hover::before {
    transform: scaleX(1);
}

.idea-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px var(--shadow);
    border-color: var(--primary);
}

.idea-header {
    margin-bottom: 15px;
}

.idea-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-word;
}

.idea-card.completed .idea-title {
    color: var(--success);
}

.idea-card.completed .idea-title::before {
    content: '✓ ';
    margin-right: 5px;
}

.idea-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.idea-content {
    color: var(--text-secondary);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.idea-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 5px 12px;
    background: rgba(99, 102, 241, 0.2);
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    display: none;
}

.empty-state.show {
    display: block;
}

.empty-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

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

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    padding: 20px;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 20px;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    padding: 25px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    color: var(--text-primary);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.close-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 25px;
}

.modal-input,
.modal-textarea {
    width: 100%;
    padding: 15px;
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 15px;
}

.modal-input:focus,
.modal-textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.modal-textarea {
    resize: vertical;
    font-family: inherit;
}

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

.modal-footer {
    padding: 20px 25px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* Sync Section */
.sync-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px var(--shadow);
    border: 1px solid var(--border);
}

.sync-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.sync-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
}

.sync-status {
    padding: 15px;
    background: var(--bg-main);
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 0.95rem;
    border: 1px solid var(--border);
}

.sync-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.sync-btn.active {
    background: var(--success) !important;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* Config Modal Specific Styles */
.modal-body label {
    display: block;
    color: var(--text-primary);
    margin-top: 15px;
    margin-bottom: 5px;
    font-weight: 500;
}

.modal-body label:first-of-type {
    margin-top: 0;
}

.config-info {
    background: var(--bg-main);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
}

.config-info p {
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.config-info p:last-child {
    margin-bottom: 0;
}

.config-info a {
    color: var(--primary);
    text-decoration: none;
}

.config-info a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .ideas-grid {
        grid-template-columns: 1fr;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .sync-controls {
        flex-direction: column;
    }

    .sync-controls .btn {
        width: 100%;
        justify-content: center;
    }

    .sync-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    max-width: 450px;
    width: 100%;
    box-shadow: 0 20px 60px var(--shadow);
    border: 1px solid var(--border);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-main);
    border: 2px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.btn-full {
    width: 100%;
    justify-content: center;
    margin-top: 10px;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.9rem;
}

.login-footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.security-note {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Logout Button */
.logout-btn {
    background: var(--bg-hover);
    color: var(--text-secondary);
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

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