/* ===================================
   WhisperThunder AI - Styles
   Color Scheme: Light Blue (#60A5FA) + Black (#000000)
   =================================== */

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

:root {
    /* Color Palette */
    --primary-blue: #60A5FA;
    --light-blue: #93C5FD;
    --dark-blue: #3B82F6;
    --black: #000000;
    --dark-gray: #1a1a1a;
    --medium-gray: #2a2a2a;
    --light-gray: #e5e7eb;
    --white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    --gradient-blue: linear-gradient(135deg, #60A5FA 0%, #3B82F6 100%);
    --gradient-overlay: linear-gradient(180deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-size-base: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    background: var(--black);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--light-blue);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(96, 165, 250, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
    margin-left: auto;
    margin-right: auto;
    padding-right: 2rem;
}

.nav-menu a {
    color: var(--white);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--primary-blue);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* Buttons */
.cta-button,
.primary-button,
.secondary-button {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    text-align: center;
}

.cta-button,
.primary-button {
    background: var(--gradient-blue);
    color: var(--black);
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.4);
}

.cta-button:hover,
.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(96, 165, 250, 0.6);
}

.primary-button.large {
    padding: 1rem 3rem;
    font-size: 1.25rem;
}

.secondary-button {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--primary-blue);
}

.secondary-button:hover {
    background: rgba(96, 165, 250, 0.1);
    border-color: var(--light-blue);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: calc(var(--spacing-xl) + 60px);
    background: 
        radial-gradient(circle at 20% 50%, rgba(96, 165, 250, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(96, 165, 250, 0.1) 0%, transparent 50%),
        var(--black);
}

.hero-content {
    max-width: 600px;
    padding-left: 8rem;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--white) 0%, var(--light-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    color: var(--primary-blue);
    display: block;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(96, 165, 250, 0.2);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--light-gray);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-preview-card {
    background: var(--gradient-primary);
    border: 2px solid var(--primary-blue);
    border-radius: 20px;
    padding: var(--spacing-md);
    box-shadow: 0 20px 60px rgba(96, 165, 250, 0.3);
    animation: float 6s ease-in-out infinite;
}

.video-placeholder {
    width: 400px;
    height: 300px;
    background: var(--medium-gray);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.play-icon {
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.play-icon:hover {
    transform: scale(1.1);
}

.preview-text {
    text-align: center;
    color: var(--primary-blue);
    font-weight: 600;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Section Styles */
section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--light-gray);
    margin-bottom: var(--spacing-lg);
}

/* Features Section */
.features {
    background: var(--dark-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background: var(--black);
    border: 2px solid transparent;
    border-radius: 15px;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(96, 165, 250, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--light-gray);
    margin-bottom: 0;
}

/* How It Works Section */
.how-it-works {
    background: var(--black);
}

.steps {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: nowrap;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    max-width: 350px;
    min-width: 280px;
    text-align: center;
}

.step-number {
    width: 80px;
    height: 80px;
    background: var(--gradient-blue);
    color: var(--black);
    font-size: 2rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 10px 30px rgba(96, 165, 250, 0.4);
}

.step-connector {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), transparent);
    align-self: flex-start;
    margin-top: 40px;
}

.step-content h3 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    color: var(--light-gray);
    margin-bottom: 0;
}

/* Examples Section */
.examples {
    background: var(--dark-gray);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.example-card {
    background: var(--black);
    border-radius: 15px;
    overflow: hidden;
    transition: transform var(--transition-normal);
}

.example-card:hover {
    transform: scale(1.05);
}

.example-video {
    position: relative;
    padding-top: 75%;
    background: var(--medium-gray);
    overflow: hidden;
}

.video-thumb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
}

.example-prompt {
    padding: var(--spacing-sm);
    color: var(--light-gray);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Try Now Section */
.try-now {
    background: var(--black);
}

.generator-interface {
    max-width: 800px;
    margin: 0 auto;
    background: var(--dark-gray);
    border: 2px solid var(--primary-blue);
    border-radius: 20px;
    padding: var(--spacing-lg);
}

.prompt-input {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--black);
    color: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    resize: vertical;
    transition: border-color var(--transition-fast);
}

.prompt-input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.generator-options {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
    min-width: 200px;
}

.option-group span {
    font-weight: 600;
    color: var(--primary-blue);
}

.select-input {
    padding: 0.75rem;
    font-size: 1rem;
    font-family: var(--font-family);
    background: var(--black);
    color: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.select-input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.generate-button {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-blue);
    color: var(--black);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.4);
}

.generate-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(96, 165, 250, 0.6);
}

.generate-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.result-area {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--black);
    border-radius: 10px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.loading {
    text-align: center;
}

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

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

/* FAQ Section */
.faq {
    background: var(--dark-gray);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--black);
    border-radius: 10px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    color: var(--white);
    border: none;
    font-size: 1.125rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary-blue);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-blue);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--light-gray);
    margin-bottom: 0;
}

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.cta-section h2 {
    margin-bottom: var(--spacing-sm);
}

.cta-section p {
    font-size: 1.25rem;
    color: var(--light-gray);
    margin-bottom: var(--spacing-md);
}

/* Footer */
.footer {
    background: var(--black);
    border-top: 1px solid rgba(96, 165, 250, 0.1);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-column h4 {
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--light-gray);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary-blue);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--light-gray);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(96, 165, 250, 0.1);
    color: var(--light-gray);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .steps {
        flex-wrap: wrap;
    }
    
    .step-connector {
        display: none;
    }
}

@media (max-width: 968px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--spacing-lg) + 60px);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .video-placeholder {
        width: 100%;
        max-width: 400px;
        height: auto;
        aspect-ratio: 4/3;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .steps {
        flex-direction: column;
        flex-wrap: nowrap;
    }
    
    .step {
        max-width: 100%;
    }
    
    .step-connector {
        width: 2px;
        height: 80px;
        margin-top: 0;
        margin-left: 40px;
        background: linear-gradient(180deg, var(--primary-blue), transparent);
        display: block;
    }
}

/* Modal/Dialog Styles */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--dark-gray);
    border: 2px solid var(--primary-blue);
    border-radius: 20px;
    padding: var(--spacing-lg);
    max-width: 500px;
    width: 90%;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--light-gray);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.modal-close:hover {
    color: var(--primary-blue);
}

.modal-icon {
    font-size: 4rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.modal-title {
    color: var(--primary-blue);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    font-size: 1.75rem;
}

.modal-text {
    color: var(--light-gray);
    text-align: center;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 640px) {
    :root {
        --font-size-base: 14px;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
        padding-top: calc(var(--spacing-lg) + 60px);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .generator-interface {
        padding: var(--spacing-md);
    }
    
    .generator-options {
        flex-direction: column;
    }
    
    .modal-content {
        padding: var(--spacing-md);
    }
    
    .modal-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .modal-buttons button,
    .modal-buttons a {
        width: 100%;
    }
}