/* ========================================
   Anthropic Brand Guidelines - EaseMate AI
   ======================================== */

/* CSS Variables - Anthropic Brand Colors */
:root {
    /* Brand Colors */
    --color-dark: #141413;
    --color-light: #faf9f5;
    --color-orange: #d97757;
    --color-blue: #6a9bcc;
    --color-green: #788c5d;
    --color-mid-gray: #b0aea5;
    --color-light-gray: #e8e6dc;

    /* Additional UI Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-shadow: rgba(20, 20, 19, 0.1);
    --color-shadow-hover: rgba(20, 20, 19, 0.15);

    /* Typography */
    --font-heading: 'Poppins', Arial, sans-serif;
    --font-body: 'Lora', Georgia, serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 1200px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-dark);
    background-color: var(--color-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

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

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

a:hover {
    color: var(--color-dark);
}

/* ========================================
   Container & Layout
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-dark);
}

.btn-primary:hover {
    background-color: var(--color-orange);
    border-color: var(--color-orange);
    color: var(--color-white);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-dark);
    border-color: var(--color-light-gray);
}

.btn-secondary:hover {
    border-color: var(--color-dark);
    background-color: transparent;
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-dark);
}

.btn-ghost:hover {
    background-color: var(--color-light-gray);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(250, 249, 245, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-light-gray);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--color-dark);
}

.logo-icon {
    color: var(--color-orange);
    font-size: 1.5rem;
}

.logo:hover {
    color: var(--color-dark);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-menu a {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-dark);
    transition: color var(--transition-fast);
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
    transition: all var(--transition-fast);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: calc(72px + var(--spacing-2xl)) 0 var(--spacing-2xl);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
    color: var(--color-orange);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-mid-gray);
    margin-bottom: var(--spacing-lg);
    max-width: 540px;
}

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

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

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

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
}

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

/* Hero Visual */

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

.hero-image {
    width: 100%;
    max-width: 500px;
    animation: float 6s ease-in-out infinite;
}

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

.ai-interface {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 50px -12px var(--color-shadow);
    overflow: hidden;
    border: 1px solid var(--color-light-gray);
}

.interface-header {
    display: flex;
    gap: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-light);
    border-bottom: 1px solid var(--color-light-gray);
}

.interface-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-light-gray);
}

.interface-dot:nth-child(1) { background-color: #ff5f57; }
.interface-dot:nth-child(2) { background-color: #febc2e; }
.interface-dot:nth-child(3) { background-color: #28c840; }

.interface-body {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.chat-bubble {
    max-width: 85%;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    line-height: 1.5;
}

.chat-bubble.user {
    background: var(--color-light-gray);
    color: var(--color-dark);
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble.ai {
    background: var(--color-orange);
    color: var(--color-white);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

/* ========================================
   Features Section
   ======================================== */

.features {
    padding: var(--spacing-2xl) 0;
    background: var(--color-white);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-orange);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-mid-gray);
}

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

/* Feature Card */

.feature-card {
    background: var(--color-light);
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px var(--color-shadow-hover);
    border-color: var(--color-orange);
}

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

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 0.9375rem;
    color: var(--color-mid-gray);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
}

.feature-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-green);
    border-radius: 50%;
}

.feature-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-dark);
}

.feature-link:hover {
    color: var(--color-orange);
}

.feature-link svg {
    transition: transform var(--transition-fast);
}

.feature-link:hover svg {
    transform: translateX(4px);
}

/* ========================================
   How It Works Section
   ======================================== */

.how-it-works {
    padding: var(--spacing-2xl) 0;
}

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

.step-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    background: var(--color-dark);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50%;
}

.step-title {
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--color-mid-gray);
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
    padding: var(--spacing-2xl) 0;
}

.cta-content {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2a2a29 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
}

.cta-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    color: var(--color-mid-gray);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

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

.cta .btn-primary {
    background: var(--color-white);
    color: var(--color-dark);
    border-color: var(--color-white);
}

.cta .btn-primary:hover {
    background: var(--color-orange);
    border-color: var(--color-orange);
    color: var(--color-white);
}

.cta .btn-ghost {
    color: var(--color-white);
}

.cta .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    background: var(--color-white);
    border-top: 1px solid var(--color-light-gray);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--color-mid-gray);
    margin-bottom: var(--spacing-md);
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-light);
    border-radius: 50%;
    color: var(--color-dark);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--color-dark);
    color: var(--color-white);
}

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

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

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

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

.footer-column a {
    font-size: 0.875rem;
    color: var(--color-mid-gray);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-light-gray);
    font-size: 0.875rem;
    color: var(--color-mid-gray);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

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

    .steps-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

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

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

@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

    .btn-lg {
        width: 100%;
    }

    .cta-actions {
        flex-direction: column;
    }

    .cta-actions .btn {
        width: 100%;
    }
}

/* ========================================
   Animations
   ======================================== */

@keyframes shimmer-image {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        var(--color-light-gray) 0%,
        var(--color-white) 50%,
        var(--color-light-gray) 100%
    );
    background-size: 200% 100%;
    animation: shimmer-image 1.5s infinite;
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card {
    animation: fadeIn 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }