/* ==========================================================================
   SUMERIA LANDING - STYLES
   ========================================================================== */

/* ==========================================================================
   1. BASE & RESET
   ========================================================================== */

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

:root {
    /* Colors */
    --color-primary: #E7FE4E;
    --color-bg-dark: #0a0a0a;
    --color-bg-medium: #0f0f0f;
    --color-bg-light: #1a1a1a;
    --color-text-primary: #fff;
    --color-text-secondary: #ccc;
    --color-text-tertiary: #ffffff;
    --color-border: #313131;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 60px;
    --spacing-2xl: 100px;
    --spacing-3xl: 200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-carousel: 0.6s ease-in-out;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   2. NAVBAR
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-bg-light);
    transform: translateY(-100%);
    transition: transform var(--transition-slow);
}

.navbar--visible {
    transform: translateY(0);
}

.navbar__content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 8%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar__logo {
    display: flex;
    align-items: center;
}

.navbar__logo img {
    max-width: 40%;
    height: auto;
    width: auto;
}

.navbar__actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Language Switch */
.lang-switch {
    display: flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
}

.lang-switch__option {
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    padding: 8px 12px;
    font-family: var(--font-primary);
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-switch__option:first-child {
    border-right: 1px solid var(--color-border);
}

.lang-switch__option--active {
    background: var(--color-primary);
    color: var(--color-bg-dark);
}

.lang-switch__option:not(.lang-switch__option--active):hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.navbar__btn {
    padding: 12px 30px;
    background: transparent;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    border: 2px solid var(--color-primary);
    transition: all var(--transition-normal);
}

.navbar__btn:hover {
    background: var(--color-primary);
    color: var(--color-bg-dark);
}

/* ==========================================================================
   3. HERO
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 60px 8%;
    position: relative;
    background: var(--color-bg-dark);
}

.hero__content {
    max-width: 1400px;
    width: 100%;
}

.hero__title {
    font-size: clamp(3rem, 12vw, 10rem);
    font-weight: var(--font-weight-black);
    line-height: 0.98;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    color: var(--color-primary);
    text-transform: uppercase;
    margin-top: var(--spacing-xl);
}

.hero__subtitle {
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    font-weight: var(--font-weight-light);
    line-height: 1.4;
    color: var(--color-text-tertiary);
    max-width: 700px;
    margin-bottom: 20px;
}

/* ==========================================================================
   4. CTA BUTTONS
   ========================================================================== */

.cta {
    display: inline-block;
    padding: 24px 60px;
    background: var(--color-primary);
    color: var(--color-bg-dark);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.02em;
    transition: all var(--transition-slow);
    border: 2px solid var(--color-primary);
}

.cta:hover {
    background: transparent;
    color: var(--color-primary);
    transform: translateY(-4px);
}

.cta:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* ==========================================================================
   5. STATS CAROUSEL
   ========================================================================== */

.stats {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-dark);
    position: relative;
}

.carousel {
    max-width: 900px;
    position: relative;
}

.carousel__track {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.carousel__slide {
    display: none;
    opacity: 0;
    transition: opacity var(--transition-carousel);
}

.carousel__slide--active {
    display: block;
    opacity: 1;
}

.stat {
    margin-bottom: var(--spacing-xl);
}

.stat__number {
    font-size: clamp(5rem, 15vw, 12rem);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.stat__text {
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    font-weight: var(--font-weight-light);
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 700px;
}

.stat__highlight {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* Carousel Controls */
.carousel__controls {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-top: var(--spacing-xl);
}

.carousel__btn {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel__btn:hover {
    background: var(--color-primary);
    color: var(--color-bg-dark);
    transform: scale(1.1);
}

.carousel__btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.carousel__indicators {
    display: flex;
    gap: 12px;
    flex: 1;
}

.carousel__indicator {
    height: 3px;
    flex: 1;
    background: #333;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.carousel__indicator--active {
    background: var(--color-primary);
}

.carousel__indicator:hover {
    background: #666;
}

.carousel__indicator--active:hover {
    background: var(--color-primary);
}

/* ==========================================================================
   6. SOLUTION
   ========================================================================== */

.solution {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-medium);
}

.solution__header {
    font-size: clamp(2rem, 6vw, 5rem);
    font-weight: var(--font-weight-black);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    max-width: 800px;
    margin-bottom: var(--spacing-2xl);
}

.solution__highlight {
    color: var(--color-primary);
}

.solution__items {
    display: grid;
    grid-template-columns: 1fr;
    gap: 80px;
    max-width: 1200px;
}

.solution-item {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-lg);
}

.solution-item__title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.solution-item__description {
    font-size: clamp(1rem, 1.8vw, 1.3rem);
    font-weight: var(--font-weight-light);
    color: #aaa;
    line-height: 1.7;
    max-width: 600px;
}

/* ==========================================================================
   7. PROCESS
   ========================================================================== */

.process {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-dark);
}

.process__title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    margin-bottom: 120px;
    letter-spacing: -0.02em;
}

.process__steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
}

.process-step {
    border-top: 2px solid var(--color-primary);
    padding-top: 30px;
}

.process-step__number {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.process-step__title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: 15px;
}

.process-step__description {
    font-size: 1rem;
    font-weight: var(--font-weight-light);
    color: #888;
    line-height: 1.6;
}

/* ==========================================================================
   8. IMPACT
   ========================================================================== */

.impact {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-medium);
}

.impact__title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: var(--font-weight-black);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.03em;
}

.impact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1400px;
}

.impact-item {
    padding: 50px 0;
    border-top: 3px solid var(--color-primary);
}

.impact-item__title {
    font-size: 1.6rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.impact-item__description {
    font-size: 1.05rem;
    font-weight: var(--font-weight-light);
    color: var(--color-text-tertiary);
    line-height: 1.7;
}

/* ==========================================================================
   8.5. TRUST
   ========================================================================== */

.trust {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-bg-light);
}

.trust__content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.trust__metric {
    text-align: center;
}

.trust__number {
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
}

.trust__label {
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    font-weight: var(--font-weight-light);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.trust__partners {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-lg);
}

.trust__partners-title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.trust__partners-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    color: var(--color-primary);
    text-decoration: underline
}

.trust__partner {
    font-size: clamp(1.1rem, 1.8vw, 1.4rem);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) 0;
}

.trust__partner a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.trust__partner a:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

.trust__partner a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* ==========================================================================
   9. MANIFESTO
   ========================================================================== */

.manifesto {
    padding: var(--spacing-3xl) 8%;
    background: var(--color-bg-dark);
}

.manifesto__content {
    max-width: 1000px;
    margin: 0 auto;
}

.manifesto__text {
    font-size: clamp(1.3rem, 2.5vw, 2rem);
    font-weight: var(--font-weight-light);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 50px;
}

.manifesto__emphasis {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
}

/* ==========================================================================
   10. FINAL CTA
   ========================================================================== */

.final-cta {
    padding: 250px 8%;
    text-align: center;
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-bg-light);
}

.final-cta__title {
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: var(--font-weight-black);
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    margin-bottom: 80px;
}

.final-cta__highlight {
    color: var(--color-primary);
}

/* ==========================================================================
   10.5. FOOTER
   ========================================================================== */

.footer {
    padding: var(--spacing-2xl) 8%;
    background: var(--color-bg-medium);
    border-top: 1px solid var(--color-bg-light);
}

.footer__content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.footer__logo img {
    max-width: 60%;
    height: auto;
    width: auto;
}

.footer__description {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    font-weight: var(--font-weight-light);
    color: var(--color-text-tertiary);
    line-height: 1.6;
    max-width: 600px;
}

.footer__social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.footer__social-link {
    padding: 10px 24px;
    background: transparent;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.05em;
    border: 2px solid var(--color-primary);
    transition: all var(--transition-normal);
}

.footer__social-link:hover {
    background: var(--color-primary);
    color: var(--color-bg-dark);
}

.footer__social-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* ==========================================================================
   11. ANIMATIONS
   ========================================================================== */

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

.hero__content,
.solution-item,
.process-step,
.impact-item {
    animation: fadeInUp 0.8s ease-out;
}

/* ==========================================================================
   12. RESPONSIVE
   ========================================================================== */

@media (max-width: 768px) {
    .navbar__content {
        padding: 15px 6%;
    }
    
    .navbar__logo {
        font-size: 1.2rem;
    }
    
    .navbar__actions {
        gap: 12px;
    }

    .lang-switch__option {
        padding: 6px 10px;
        font-size: 0.7rem;
    }

    .navbar__btn {
        padding: 10px 20px;
        font-size: 0.8rem;
    }
    
    .hero,
    .stats,
    .solution,
    .process,
    .impact,
    .trust,
    .manifesto {
        padding: var(--spacing-2xl) 6%;
    }
    
    .final-cta {
        padding: 150px 6%;
    }
    
    .trust__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .trust__partners {
        border-left: none;
        border-top: 4px solid var(--color-primary);
        padding-left: 0;
        padding-top: var(--spacing-lg);
        text-align: center;
    }
    
    .trust__partners-list {
        align-items: center;
    }
    
    .footer {
        padding: var(--spacing-xl) 6%;
    }
    
    .footer__logo img {
        max-width: 100px;
    }
    
    .footer__social {
        flex-direction: column;
        gap: var(--spacing-sm);
        width: 100%;
        max-width: 300px;
    }
    
    .footer__social-link {
        width: 100%;
        text-align: center;
    }
    
    .solution__items,
    .process__steps,
    .impact__grid {
        gap: var(--spacing-xl);
    }
    
    .carousel__controls {
        gap: 15px;
    }
    
    .carousel__btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* ==========================================================================
   13. ACCESSIBILITY
   ========================================================================== */

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus styles */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-primary: #ffff00;
        --color-text-primary: #ffffff;
    }
}