/* ========================================
   Clarity Landing Page - Slack-Inspired Design
   ======================================== */

/* Variables */
:root {
    --color-primary: #611f69;
    --color-primary-hover: #4a154b;
    --color-secondary: #007a5a;
    --color-text: #1d1c1d;
    --color-text-light: #616061;
    --color-background: #ffffff;
    --color-background-alt: #f8f8f8;
    --color-border: #e0e0e0;
    --color-success: #007a5a;
    --color-error: #e01e5a;

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-large: 18px;
    --font-size-xlarge: 20px;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;

    --border-radius: 8px;
    --border-radius-lg: 12px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.hidden {
    display: none !important;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-login {
    padding: 0.5rem 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
}

.btn-primary {
    background: var(--color-primary);
    color: white !important;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-hero {
    padding: 1rem 2.5rem;
    font-size: var(--font-size-large);
    background: var(--color-primary);
    color: white;
}

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

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

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

.btn-form {
    width: 100%;
    padding: 1rem;
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-large);
}

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

.btn-pricing {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-large);
}

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

/* Hero Section */
.hero {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #f8f5ff 0%, #ffffff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-xlarge);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.hero-note {
    font-size: 14px;
    color: var(--color-text-light);
}

/* Demo Widget */
.demo-widget {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    max-width: 400px;
}

.demo-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.demo-avatar {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.demo-title {
    font-weight: 600;
}

.demo-message {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    max-width: 80%;
}

.demo-message.user {
    background: var(--color-background-alt);
    margin-left: auto;
}

.demo-message.bot {
    background: #e8f5e9;
    margin-right: auto;
}

/* Sections */
section {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

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

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + 16px);
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.step-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.step p {
    color: var(--color-text-light);
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-lg);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-light);
}

/* Pricing */
.pricing {
    background: var(--color-background-alt);
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
}

.pricing-header {
    text-align: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.pricing-badge {
    display: inline-block;
    background: var(--color-success);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    margin-right: 0.25rem;
}

.pricing-price .amount {
    font-size: 4rem;
    font-weight: 700;
}

.pricing-price .period {
    font-size: 1.5rem;
    color: var(--color-text-light);
    margin-left: 0.25rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.pricing-features li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    font-size: var(--font-size-large);
}

.pricing-note {
    text-align: center;
    color: var(--color-text-light);
    font-size: 14px;
    margin-top: var(--spacing-md);
}

/* CTA Section / Onboarding */
.cta-section {
    padding: var(--spacing-xxl) 0;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: var(--font-size-large);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.onboarding-form {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.form-group input {
    width: 100%;
    padding: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(97, 31, 105, 0.1);
}

.form-note {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
}

/* Processing */
.onboarding-processing {
    padding: var(--spacing-xl);
    text-align: center;
}

.processing-content h3 {
    font-size: 1.5rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.processing-content p {
    color: var(--color-text-light);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-background-alt);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

.error-box {
    background: #fee;
    border: 1px solid var(--color-error);
    color: var(--color-error);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
}

/* Success */
.onboarding-success {
    padding: var(--spacing-xl);
    text-align: center;
}

.success-badge {
    display: inline-block;
    background: var(--color-success);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.onboarding-success h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.code-block {
    background: var(--color-background-alt);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin: var(--spacing-lg) 0;
    text-align: left;
}

.code-block label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.code-block pre {
    background: white;
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-size: 14px;
    margin-bottom: var(--spacing-md);
}

.success-cta {
    margin-top: var(--spacing-lg);
}

.success-cta p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

/* Footer */
.footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-base);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

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

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

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        order: -1;
    }

    .demo-widget {
        max-width: 100%;
    }

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

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

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xxl: 3rem;
        --spacing-xl: 2rem;
    }

    .nav {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .section-title {
        font-size: 2rem;
    }

    .section-subtitle {
        font-size: var(--font-size-base);
    }

    .cta-title {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .pricing-price .amount {
        font-size: 3rem;
    }

    .btn-hero {
        width: 100%;
    }
}