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

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

:root {
    /* Colors */
    --color-primary: #0891b2;
    --color-primary-dark: #0e7490;
    --color-accent: #6366f1;
    --color-bg-dark: #0f172a;
    --color-bg-darker: #020617;
    --color-bg-card: #1e293b;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
    
    /* Spacing */
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(8, 145, 178, 0.3);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-size: 1rem;
    overflow-x: hidden;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: 1rem;
}

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

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav__brand {
    flex-shrink: 0;
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

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

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

.nav__list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav__link {
    color: var(--color-text-secondary);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__language {
    margin-left: var(--spacing-sm);
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.lang-toggle:hover {
    border-color: var(--color-primary);
}

.lang-option {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    cursor: pointer;
}

.lang-option.active {
    color: var(--color-primary);
    font-weight: 600;
}

.lang-separator {
    color: var(--color-border);
    margin: 0 0.5rem;
}

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

.nav__toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.7) 0%, rgba(30, 41, 59, 0.7) 50%, rgba(15, 23, 42, 0.7) 100%), 
                url('../images/banner.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -2;
}

.hero__background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(8, 145, 178, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
    animation: pulse 10s ease-in-out infinite;
    z-index: -1;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.5;
    }
    50% {
        opacity: 1;
    }
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

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

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: var(--font-sans);
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-md);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.btn--primary:active {
    transform: translateY(0);
}

/* ==========================================================================
   Sections
   ========================================================================== */

section {
    padding: var(--spacing-xl) 0;
}

.section__title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.section__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* ==========================================================================
   Services Section
   ========================================================================== */

.services {
    background: var(--color-bg-darker);
}

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

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow), var(--shadow-lg);
}

.service-card__icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.service-card__icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-text-primary);
}

.service-card__title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.service-card__description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.service-card__list {
    list-style: none;
    padding-left: 0;
}

.service-card__list li {
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-card__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ==========================================================================
   Expertise Section
   ========================================================================== */

.expertise {
    background: var(--color-bg-dark);
}

.expertise__content {
    max-width: 900px;
    margin: 0 auto;
}

.expertise__text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.expertise__highlight {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-normal);
}

.expertise__highlight:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.expertise__number {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.expertise__tech {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.expertise__label {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ==========================================================================
   Reference Section
   ========================================================================== */

.reference {
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1) 0%, rgba(99, 102, 241, 0.1) 100%);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.reference__content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.reference__badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(8, 145, 178, 0.2);
    border: 1px solid var(--color-primary);
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.reference__title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.reference__description {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.reference__metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.metric {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 1rem;
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.metric:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.metric__number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.metric__icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.metric__label {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact {
    background: var(--color-bg-darker);
}

.contact__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact__text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact__details {
    margin-top: var(--spacing-md);
}

.contact__email {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.contact__email:hover {
    color: var(--color-accent);
    transform: scale(1.05);
}

.contact__location {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-top: var(--spacing-sm);
}

/* ==========================================================================
   Clients/References Section
   ========================================================================== */

.clients {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-darker);
}

.clients__subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

.clients__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
    justify-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.client-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    opacity: 0.7;
}

.client-logo:hover {
    transform: scale(1.05);
    opacity: 1;
}

.client-logo img {
    max-width: 160px;
    max-height: 80px;
    width: auto;
    height: auto;
    filter: grayscale(100%) brightness(0) invert(1);
    opacity: 0.7;
    transition: filter var(--transition-normal), opacity var(--transition-normal);
}

.client-logo:hover img {
    filter: grayscale(0%) brightness(1) invert(0);
    opacity: 1;
}

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

.footer {
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
}

.footer__text {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

@media (max-width: 1024px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-lg: 3rem;
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        transition: transform var(--transition-normal);
    }
    
    .nav__menu.active {
        transform: translateY(0);
    }
    
    .nav__list {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-sm);
    }
    
    .nav__link {
        display: block;
        padding: 0.75rem;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(1) {
        transform: rotate(45deg) translateY(8px);
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active .nav__toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translateY(-8px);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .clients__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .expertise__highlights {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reference__metrics {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
        --spacing-md: 1.5rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        min-height: 90vh;
    }
    
    .clients__grid {
        grid-template-columns: 1fr;
    }
    
    .client-logo img {
        max-width: 140px;
        max-height: 70px;
    }
    
    .expertise__highlights {
        grid-template-columns: 1fr;
    }
    
    .reference__metrics {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .header,
    .nav__toggle,
    .lang-toggle {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    body {
        background: white;
        color: black;
    }
}