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

:root {
    --navy-blue: #001f3f;
    --navy-light: #003366;
    --navy-dark: #001529;
    --accent-blue: #0074D9;
    --white: #ffffff;
    --light-gray: #f4f4f4;
    --medium-gray: #e0e0e0;
    --dark-gray: #333333;
    --text-gray: #555555;
    --success-green: #2ecc40;
    --error-red: #ff4136;
}

body {
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light-gray);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Landing Page Styles */
.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--navy-blue) 0%, var(--navy-light) 100%);
}

.landing-header {
    padding: 2rem 4rem;
    background-color: var(--navy-dark);
}

.logo h1 {
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 2px;
}

.landing-main {
    flex: 1;
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-section {
    text-align: center;
    margin-bottom: 4rem;
}

.hero-title {
    color: var(--white);
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.hero-text {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.cta-section {
    margin: 3rem 0;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-blue);
    color: var(--white);
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 5px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    cursor: pointer;
}

.cta-button:hover {
    background-color: #0063b8;
    transform: translateY(-2px);
}

.features-section {
    margin-top: 4rem;
}

.features-title {
    color: var(--white);
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 600;
}

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

.feature-card {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, background-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.15);
}

.feature-card h4 {
    color: var(--white);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--light-gray);
    font-size: 1rem;
    line-height: 1.6;
}

.landing-footer {
    background-color: var(--navy-dark);
    padding: 2rem;
    text-align: center;
    color: var(--white);
}

/* Application Page Styles */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--light-gray);
}

.app-header {
    background-color: var(--navy-blue);
    padding: 1.5rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.app-header .logo h1 {
    font-size: 2rem;
}

.app-header .logo h1 a {
    color: var(--white);
}

.app-nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--white);
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-blue);
}

.app-main {
    flex: 1;
    padding: 3rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.form-section,
.output-section {
    background-color: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
}

.section-title {
    color: var(--navy-blue);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 600;
    border-bottom: 3px solid var(--accent-blue);
    padding-bottom: 0.5rem;
}

.brainstorm-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-label {
    color: var(--navy-blue);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.required {
    color: var(--error-red);
}

.form-control {
    padding: 0.75rem;
    border: 2px solid var(--medium-gray);
    border-radius: 5px;
    font-size: 1rem;
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
    transition: border-color 0.3s ease;
    background-color: var(--white);
    color: var(--dark-gray);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.textarea-large {
    min-height: 150px;
    resize: vertical;
}

.textarea-medium {
    min-height: 100px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-primary,
.btn-secondary,
.btn-copy {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    font-family: 'Segoe UI', Helvetica, Arial, sans-serif;
}

.btn-primary {
    background-color: var(--accent-blue);
    color: var(--white);
    flex: 1;
}

.btn-primary:hover:not(:disabled) {
    background-color: #0063b8;
    transform: translateY(-2px);
}

.btn-primary:disabled {
    background-color: var(--medium-gray);
    cursor: not-allowed;
}

.btn-secondary {
    background-color: var(--medium-gray);
    color: var(--dark-gray);
}

.btn-secondary:hover {
    background-color: #c0c0c0;
}

.btn-copy {
    background-color: var(--navy-blue);
    color: var(--white);
    padding: 0.5rem 1.5rem;
}

.btn-copy:hover {
    background-color: var(--navy-light);
}

.output-section {
    display: flex;
    flex-direction: column;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.loading-spinner {
    text-align: center;
    padding: 3rem;
}

.spinner {
    border: 4px solid var(--medium-gray);
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--text-gray);
    font-size: 1rem;
}

.error-message {
    background-color: #ffe6e6;
    color: var(--error-red);
    padding: 1rem;
    border-radius: 5px;
    border-left: 4px solid var(--error-red);
    margin-bottom: 1rem;
}

.output-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background-color: var(--light-gray);
    border-radius: 5px;
    border: 2px solid var(--medium-gray);
    min-height: 400px;
    max-height: 700px;
}

.output-content:empty::before {
    content: "Your brainstorming analysis will appear here...";
    color: var(--text-gray);
    font-style: italic;
}

/* Markdown Styling in Output */
.output-content h1,
.output-content h2,
.output-content h3,
.output-content h4 {
    color: var(--navy-blue);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.output-content h1 { font-size: 2rem; }
.output-content h2 { font-size: 1.6rem; }
.output-content h3 { font-size: 1.3rem; }
.output-content h4 { font-size: 1.1rem; }

.output-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--dark-gray);
}

.output-content ul,
.output-content ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.output-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.output-content strong {
    color: var(--navy-blue);
    font-weight: 600;
}

.output-content code {
    background-color: var(--medium-gray);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
}

.output-content pre {
    background-color: var(--medium-gray);
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.app-footer {
    background-color: var(--navy-blue);
    padding: 1.5rem;
    text-align: center;
    color: var(--white);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app-main {
        grid-template-columns: 1fr;
    }
    
    .landing-header,
    .app-header {
        padding: 1.5rem 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .landing-main,
    .app-main {
        padding: 2rem 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-text {
        font-size: 1rem;
    }
    
    .form-section,
    .output-section {
        padding: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .app-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}