/* CSS Variables for theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --background: #0f0f1a;
    --surface: #1a1a2e;
    --surface-light: #252540;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gradient-start: #6366f1;
    --gradient-end: #8b5cf6;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 2rem 1rem;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    font-size: 2.5rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
}

.tagline {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Card Component */
.card {
    background: var(--surface);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

input[type="text"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-light);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input[type="text"]:focus,
input[type="date"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
}

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

.btn-secondary {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

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

.btn-danger:hover {
    background: #dc2626;
}

.button-group {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Upload Section */
.upload-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.upload-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

input[type="file"] {
    display: none;
}

.upload-btn {
    cursor: pointer;
}

.file-name {
    margin-left: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--surface-light);
    padding: 1rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    overflow-x: auto;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--surface-light);
}

.tab-btn.active {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Chart Container */
.chart-container {
    background: var(--surface-light);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
    max-height: 300px;
}

/* Keyword Cloud */
.keyword-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    padding: 1rem;
}

.keyword-tag {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: transform 0.2s;
}

.keyword-tag:hover {
    transform: scale(1.1);
}

.keyword-tag.size-1 {
    font-size: 0.75rem;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
}

.keyword-tag.size-2 {
    font-size: 0.875rem;
    background: rgba(99, 102, 241, 0.3);
    color: var(--primary-color);
}

.keyword-tag.size-3 {
    font-size: 1rem;
    background: rgba(99, 102, 241, 0.4);
    color: white;
}

.keyword-tag.size-4 {
    font-size: 1.125rem;
    background: rgba(99, 102, 241, 0.6);
    color: white;
}

.keyword-tag.size-5 {
    font-size: 1.25rem;
    background: var(--primary-color);
    color: white;
}

/* Emotion Breakdown */
.emotion-breakdown {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.emotion-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--surface-light);
    border-radius: 8px;
}

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

.emotion-bar {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.emotion-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.emotion-count {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 2rem;
    text-align: right;
}

/* Insights */
.insights-container {
    margin-bottom: 1rem;
}

.insight-card {
    background: var(--surface-light);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    border-left: 4px solid var(--primary-color);
}

.insight-card h4 {
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.insight-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Journal Section */
.section-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.journal-controls {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.journal-controls input,
.journal-controls select {
    flex: 1;
    min-width: 150px;
}

.dream-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.dream-entry {
    background: var(--surface-light);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.dream-entry:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.dream-entry-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.dream-entry-title {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dream-entry-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.dream-entry-content {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.dream-entry-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dream-entry-keywords {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.dream-keyword {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
}

.dream-entry-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    padding: 0.5rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--border-color);
}

.btn-icon.delete:hover {
    color: var(--danger);
}

.journal-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* Empty State */
.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
    font-size: 0.875rem;
}

/* Footer */
.footer {
    background: var(--surface);
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

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

::-webkit-scrollbar-track {
    background: var(--surface);
    border-radius: 4px;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive Design */
@media (min-width: 640px) {
    .header h1 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .emotion-breakdown {
        grid-template-columns: repeat(4, 1fr);
    }

    .section-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

@media (min-width: 768px) {
    .main-content {
        padding: 2rem;
    }

    .card {
        padding: 2rem;
    }

    .header {
        padding: 3rem 2rem;
    }

    .header h1 {
        font-size: 2.5rem;
    }

    .tagline {
        font-size: 1.125rem;
    }
}

@media (min-width: 1024px) {
    .entry-form {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .entry-form .form-group:nth-child(3) {
        grid-column: span 2;
    }

    .entry-form .button-group {
        grid-column: span 2;
    }
}

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

.dream-entry {
    animation: fadeIn 0.3s ease;
}

.insight-card {
    animation: fadeIn 0.3s ease;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface);
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal {
    background: var(--surface);
    border-radius: 16px;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.3s ease;
}

.modal h3 {
    margin-bottom: 1rem;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}