/* ===================================
   ATELIER - Premium Landing Page
   =================================== */

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

:root {
    /* Color Palette - Minimal & Cohesive */
    --color-primary: #0A0A0A;
    --color-secondary: #FAFAFA;
    --color-accent: #1A1A1A;
    --color-border: #E5E5E5;
    --color-text-primary: #0A0A0A;
    --color-text-secondary: #666666;
    --color-text-light: #FAFAFA;
    
    /* Spacing System - Perfect Padding */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-2xl: 96px;
    --spacing-3xl: 128px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-size: 18px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 2px;
    color: var(--color-text-primary);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 15px;
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}

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

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 10px 24px;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: 6px;
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-1px);
    color: var(--color-text-light);
}

.btn-primary-large {
    display: inline-block;
    padding: 16px 40px;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}

.btn-primary-large:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.hero .btn-primary-large {
    background-color: var(--color-secondary);
    color: var(--color-text-primary);
}

.hero .btn-primary-large:hover {
    background-color: #FFFFFF;
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

.btn-secondary-large {
    display: inline-block;
    padding: 16px 40px;
    background-color: transparent;
    color: var(--color-text-primary);
    text-decoration: none;
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    transition: var(--transition);
}

.btn-secondary-large:hover {
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
}

.hero .btn-secondary-large {
    color: var(--color-text-light);
    border-color: rgba(250, 250, 250, 0.4);
}

.hero .btn-secondary-large:hover {
    border-color: var(--color-text-light);
    background-color: rgba(250, 250, 250, 0.1);
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(72px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    text-align: center;
    background-color: var(--color-primary);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('6193485.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.4;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.3) 0%, rgba(10, 10, 10, 0.7) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    z-index: 2;
}

.hero-title {
    font-size: 64px;
    font-weight: var(--font-weight-semibold);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    color: var(--color-text-light);
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(250, 250, 250, 0.85);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    font-weight: var(--font-weight-normal);
}

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

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: #FFFFFF;
}

.section-title {
    font-size: 48px;
    font-weight: var(--font-weight-semibold);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card {
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-text-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-secondary);
    border-radius: 10px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.feature-title {
    font-size: 22px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Integrations Section */
.integrations {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-secondary);
}

.integrations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.integration-card {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

.integration-card:hover {
    border-color: var(--color-text-primary);
    transform: translateY(-4px);
}

.integration-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-primary);
}

.integration-title {
    font-size: 18px;
    font-weight: var(--font-weight-medium);
}

/* CTA Section */
.cta {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-primary);
    color: var(--color-text-light);
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: 48px;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    color: var(--color-text-light);
}

.cta-subtitle {
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    color: rgba(250, 250, 250, 0.8);
}

.cta .btn-primary-large {
    background-color: var(--color-secondary);
    color: var(--color-text-primary);
}

.cta .btn-primary-large:hover {
    background-color: #E5E5E5;
}

/* Signup Form */
.signup-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-input {
    padding: 16px 20px;
    font-size: 16px;
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-primary);
    background-color: var(--color-secondary);
    border: 1.5px solid transparent;
    border-radius: 8px;
    transition: var(--transition);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-text-secondary);
}

.form-input:focus {
    border-color: rgba(250, 250, 250, 0.3);
    background-color: #FFFFFF;
    transform: translateY(-1px);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: #ff4444;
}

.btn-submit {
    width: 100%;
    padding: 16px 40px;
    background-color: var(--color-secondary);
    color: var(--color-text-primary);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
    background-color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-submit:active:not(:disabled) {
    transform: translateY(0);
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

.spinner-circle {
    stroke: var(--color-text-primary);
    stroke-linecap: round;
    stroke-dasharray: 60;
    stroke-dashoffset: 45;
}

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

.form-message {
    margin-top: var(--spacing-md);
    font-size: 15px;
    font-weight: var(--font-weight-medium);
    min-height: 24px;
}

.form-message.success {
    color: #4CAF50;
}

.form-message.error {
    color: #ff6b6b;
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background-color: #FFFFFF;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    font-size: 16px;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
}

.footer-text {
    font-size: 14px;
    color: var(--color-text-secondary);
}

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

.footer-bottom p {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .cta-title {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .integrations-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .nav-links a:not(.btn-primary) {
        display: none;
    }
    
    .hero {
        padding: calc(72px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .cta-title {
        font-size: 32px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-primary-large,
    .btn-secondary-large {
        width: 100%;
        text-align: center;
    }
    
    .features,
    .integrations,
    .cta {
        padding: var(--spacing-xl) 0;
    }
    
    .signup-form {
        width: 100%;
    }
    
    .form-input {
        font-size: 16px; /* Prevents iOS zoom on focus */
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Styles */
@media print {
    .nav,
    .cta,
    .footer {
        display: none;
    }
}