/* Base styles and variables */
:root {
    --sidebar-width: 220px;
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f9f9f9;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0,0,0,0.05);
    --transition-speed: 0.3s;
    
    /* Theme colors */
    --theme-blue: #4A89DC;
    --theme-light-blue: #93c2ef;
    --theme-green: #5D9E7A;
    --theme-light-green: #90CFB0;
    --theme-cream: #FDF6E3;
    --theme-accent: #E76D6F;
    --theme-yellow: #F6CD61;
    --theme-brown: #8B5A34;
}

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

body {
    height: 100vh;
    background-color: #f5f5f5;
    color: var(--text-color);
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Layout containers */
.app-container {
    height: 100vh;
    position: relative;
    display: flex;
    width: 100%;
}

/* Content area */
.content-area {
    margin-left: var(--sidebar-width);
    padding: 20px;
    min-height: 100vh;
    transition: margin-left var(--transition-speed) ease, width var(--transition-speed) ease;
    width: calc(100% - var(--sidebar-width));
    overflow-y: auto;
}

/* Style for when sidebar is collapsed */
.left-panel.hidden + .content-area {
    margin-left: 0;
    width: 100%;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
    background-color: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    min-height: 80vh;
    display: none;
}

.container.active {
    display: block;
}

/* Left panel / Sidebar */
.left-panel {
    width: var(--sidebar-width);
    background-color: var(--theme-light-blue);
    color: #333;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 10;
    box-shadow: 4px 0 15px rgba(0,0,0,0.15);
    transition: transform var(--transition-speed) ease;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    border: none;
}

.left-panel.hidden {
    transform: translateX(-100%);
}

.sidebar-toggle {
    position: fixed;
    left: var(--sidebar-width);
    top: 10px;
    z-index: 20;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--theme-green);
    color: white;
    border: 3px solid white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    box-shadow: 0 3px 8px rgba(0,0,0,0.3);
}

.sidebar-toggle:hover {
    background-color: var(--theme-accent);
    transform: scale(1.1);
}

.sidebar-toggle.collapsed i {
    transform: rotate(180deg);
}

.sidebar-toggle.collapsed {
    left: 10px;
}

/* Panel buttons */
.panel-buttons {
    display: flex;
    flex-direction: column;
    padding: 0.8rem;
    flex-grow: 1;
    position: relative;
    align-items: stretch;
}

.panel-button {
    background-color: var(--theme-cream);
    color: #333;
    border: none;
    padding: 0.7rem 0.8rem;
    margin-bottom: 0.8rem;
    border-radius: 20px;
    cursor: pointer;
    text-align: center;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 3px 0 var(--theme-blue);
    position: relative;
    overflow: hidden;
    font-weight: 500;
    margin-left: 0;
    margin-right: 0;
    width: 100%;
}

.panel-button:hover {
    background-color: var(--theme-yellow);
    transform: translateY(-2px);
    box-shadow: 0 5px 0 var(--theme-blue);
}

.panel-button.active {
    background-color: var(--theme-green);
    color: white;
    font-weight: bold;
    box-shadow: 0 3px 0 var(--theme-brown);
}

.panel-button i {
    margin-right: 8px;
}

/* Subject section */
.subject-section {
    margin-top: 1rem;
    margin-bottom: 1rem;
    border-top: 1px solid rgba(0,0,0,0.1);
    padding-top: 1rem;
}

.subject-title {
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    color: #333;
    text-align: center;
}

.subject-btn {
    background-color: #f0f0f0;
    box-shadow: 0 3px 0 var(--theme-blue);
}

/* Panel footer */
.panel-footer {
    width: 100%;
    padding: 12px;
    font-size: 0.8rem;
    color: rgba(0, 0, 0, 0.7);
    text-align: center;
    line-height: 1.5;
    margin-top: auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.footer-links a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.8rem;
}

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

/* Ghibli theme elements */
.ghibli-header {
    position: relative;
    width: 100%;
    height: 80px;
    background: linear-gradient(to bottom, #7cc0ff, var(--theme-light-blue));
    overflow: hidden;
    border-bottom: 2px solid rgba(255,255,255,0.3);
}

.ghibli-clouds {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" preserveAspectRatio="none"><path d="M0,100 C150,200 350,0 500,100 C650,200 850,0 1000,100 L1000,0 L0,0 Z" fill="rgba(255,255,255,0.3)"></path></svg>') repeat-x;
    background-size: 50% 100%;
    animation: cloudMove 30s linear infinite;
}

@keyframes cloudMove {
    from { background-position: 0 0; }
    to { background-position: 100% 0; }
}

.site-title {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 1.2rem;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
    white-space: nowrap;
    font-weight: 600;
}

.ghibli-grass {
    position: relative;
    height: 15px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" preserveAspectRatio="none"><path d="M0,0 C50,40 100,10 150,40 C200,70 250,20 300,50 C350,80 400,30 450,60 C500,90 550,40 600,70 C650,100 700,50 750,80 C800,30 850,60 900,20 C950,50 1000,0 1000,0 L1000,100 L0,100 Z" fill="%235D9E7A"></path></svg>') repeat-x;
    background-size: contain;
}

/* Dropdown frames */
.dropdown-frames {
    margin-top: 1rem;
}

.sidebar-frame {
    background-color: rgba(255,255,255,0.3);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.frame-title {
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 600;
}

.frame-content {
    padding: 5px 0;
}

.dropdown-container {
    margin-bottom: 10px;
}

.dropdown-container label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.8rem;
    color: #555;
}

.dropdown-container select {
    width: 100%;
    padding: 6px 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    background-color: white;
    font-size: 0.8rem;
    color: var(--text-color);
}

/* Home container */
.welcome-section {
    text-align: center;
    padding: 2rem 0;
}

.welcome-section h1 {
    color: var(--theme-blue);
    margin-bottom: 1rem;
}

.welcome-section p {
    color: #666;
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 2rem;
}

.feature-card {
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    border-color: var(--theme-light-blue);
}

.feature-card i {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--theme-blue);
}

.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.feature-card p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Chat container */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 20px;
}

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

.welcome-message {
    background-color: var(--light-bg);
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.welcome-message i {
    font-size: 1.5rem;
    color: var(--theme-blue);
}

textarea#user-input {
    width: 100%;
    height: 120px;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-size: 1rem;
    resize: none;
    transition: border-color 0.3s;
}

textarea#user-input:focus {
    outline: none;
    border-color: var(--theme-blue);
    box-shadow: 0 0 0 2px rgba(74, 137, 220, 0.2);
}

.button-container {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

#submit-button, #optimize-button {
    padding: 8px 16px;
    border-radius: 20px;
    border: none;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

#optimize-button {
    background-color: #f8f9fa;
    color: #555;
    border: 1px solid #ddd;
}

#submit-button {
    background-color: var(--theme-green);
    color: white;
}

#submit-button:hover, #optimize-button:hover {
    transform: translateY(-2px);
}

#submit-button:hover {
    background-color: var(--theme-blue);
}

#optimize-button:hover {
    background-color: #e9ecef;
}

.output-container {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    border-radius: 8px;
    background-color: var(--light-bg);
    min-height: 300px;
}

#loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top-color: var(--theme-blue);
    animation: spin 1s linear infinite;
}

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

.hidden {
    display: none !important;
}

/* Modal dialog */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.about-modal {
    background-color: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s ease;
}

.modal-overlay.active .about-modal {
    transform: translateY(0);
    opacity: 1;
}

.about-modal-header {
    padding: 1.5rem;
    background-color: var(--theme-light-blue);
    color: white;
    position: relative;
}

.about-modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.about-modal-close {
    position: absolute;
    right: 15px;
    top: 15px;
    background: transparent;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s;
}

.about-modal-close:hover {
    background-color: rgba(255,255,255,0.2);
}

.about-modal-content {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

.about-modal-content p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.about-modal-content h3 {
    margin: 1.5rem 0 0.8rem 0;
    color: var(--theme-blue);
}

.about-modal-content ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.about-modal-content ul li {
    margin-bottom: 0.5rem;
}

.about-modal-footer {
    padding: 1rem 1.5rem;
    background-color: #f8f9fa;
    border-top: 1px solid #eee;
    font-size: 0.9rem;
    color: #666;
}