/* ========================================
   CSS Variables & Design System
   ======================================== */
:root {
    /* Professional Colors */
    --color-primary: #1a4d6d;
    --color-primary-light: #4a9ebb;
    --color-primary-dark: #0d2d44;
    --color-secondary: #2a6d8f;
    --color-accent: #4a9ebb;

    /* Professional Gradients */
    --gradient-primary: linear-gradient(135deg, #1a4d6d 0%, #2a6d8f 100%);
    --gradient-secondary: linear-gradient(135deg, #4a9ebb 0%, #1a4d6d 100%);
    --gradient-hero: linear-gradient(135deg, rgba(26, 77, 109, 0.95) 0%, rgba(42, 109, 143, 0.9) 100%);

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Semantic Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

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

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-tooltip: 1050;
}

/* ========================================
   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-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-gray-800);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0f9ff 100%);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul {
    list-style: none;
}

/* ========================================
   Utility Classes
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-4xl) 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(26, 77, 109, 0.1);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
    border-bottom: 2px solid rgba(26, 77, 109, 0.2);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav__logo-img {
    height: 50px;
    width: auto;
    transition: transform var(--transition-base);
}

.nav__logo-img:hover {
    transform: scale(1.05);
}

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

.nav__link {
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.nav__link:hover {
    color: var(--color-white);
    transform: scale(1.05);
    background-color: var(--color-primary);
}

.nav__link:hover::after {
    width: 80%;
}

.nav__toggle,
.nav__close {
    display: none;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn--primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn--whatsapp {
    background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
    width: 100%;
    margin-top: var(--spacing-xl);
}

.btn--whatsapp svg {
    width: 24px;
    height: 24px;
}

.btn--whatsapp:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0f9ff 100%);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
    z-index: 2;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero__content {
    z-index: 1;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-lg);
}

.hero__title-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero__image {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__blob {
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite;
    opacity: 0.2;
    position: absolute;
    box-shadow: 0 0 60px rgba(26, 77, 109, 0.3);
}

.hero__logo {
    width: 280px;
    height: auto;
    position: relative;
    z-index: 2;
    filter: drop-shadow(0 10px 30px rgba(26, 77, 109, 0.3));
    animation: logoFloat 6s ease-in-out infinite;
}

@keyframes logoFloat {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }
}

@keyframes morph {

    0%,
    100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }

    25% {
        border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
    }

    50% {
        border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
    }

    75% {
        border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
    }
}

/* ========================================
   About Section
   ======================================== */
.about {
    background-color: var(--color-white);
    position: relative;
    z-index: 2;
}

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

.about__description {
    font-size: var(--font-size-lg);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.about__description strong {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.stat {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(26, 77, 109, 0.05) 0%, rgba(42, 109, 143, 0.05) 100%);
    border-radius: var(--radius-xl);
    transition: transform var(--transition-base);
}

.stat:hover {
    transform: translateY(-5px);
}

.stat__number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.stat__label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    font-weight: var(--font-weight-medium);
}

/* ========================================
   Services Section
   ======================================== */
.services {
    background: linear-gradient(180deg, #f0f9ff 0%, #e0f2fe 100%);
    position: relative;
    z-index: 2;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(26, 77, 109, 0.15);
    transition: all var(--transition-base);
    border: 2px solid #e0f2fe;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(26, 77, 109, 0.3);
    border-color: var(--color-primary);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card__icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(26, 77, 109, 0.1) 0%, rgba(42, 109, 143, 0.1) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

.service-card:hover .service-card__icon {
    background: var(--gradient-primary);
    transform: scale(1.1);
}

.service-card:hover .service-card__icon svg {
    color: var(--color-white);
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.service-card__description {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ========================================
   Contact Section
   ======================================== */
.contact {
    background-color: var(--color-white);
    position: relative;
    z-index: 2;
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    max-width: 1100px;
    margin: 0 auto;
}

.contact__info {
    background: linear-gradient(135deg, rgba(26, 77, 109, 0.05) 0%, rgba(42, 109, 143, 0.05) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    height: fit-content;
}

.contact__info-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xl);
}

.contact__info-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact__info-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact__info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact__info-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-white);
}

.contact__info-item h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.contact__info-item a,
.contact__info-item p {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
}

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

.contact__form-wrapper {
    background-color: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-sm);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(26, 77, 109, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--gradient-primary);
    color: var(--color-gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 4px solid var(--color-accent);
    position: relative;
    z-index: 2;
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer__logo {
    height: 50px;
    width: auto;
    margin-bottom: var(--spacing-md);
    filter: brightness(0) invert(1);
}

.footer__description {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-gray-400);
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

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

.footer__list a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

.footer__list a:hover {
    color: var(--color-white);
}

.footer__bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-700);
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 968px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--color-white);
        box-shadow: var(--shadow-2xl);
        padding: var(--spacing-3xl) var(--spacing-xl);
        transition: right var(--transition-slow);
        z-index: var(--z-fixed);
    }

    .nav__menu.show-menu {
        right: 0;
    }

    .nav__list {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .nav__close {
        display: block;
        position: absolute;
        top: var(--spacing-lg);
        right: var(--spacing-lg);
        font-size: var(--font-size-2xl);
        cursor: pointer;
        color: var(--color-gray-700);
    }

    .nav__toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
    }

    .nav__toggle-icon {
        width: 25px;
        height: 3px;
        background-color: var(--color-gray-700);
        border-radius: var(--radius-full);
        transition: all var(--transition-base);
    }

    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__image {
        display: none;
    }

    .hero__buttons {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-3xl) 0;
    }

    .section__title {
        font-size: var(--font-size-3xl);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

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

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

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

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }
}

/* ========================================
   Animations & Utilities
   ======================================== */
.fade-in {
    animation: fadeIn 0.6s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}