/* ===== CSS VARIABLES ===== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #0f172a;
    --color-accent: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-lighter: #94a3b8;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-border: #e2e8f0;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

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

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

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

button,
input,
textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

/* ===== UTILITIES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

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

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section__badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.section__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn--outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

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

.btn--white:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
}

.btn--lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

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

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.header--scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.5rem;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
}

.nav__logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
}

.nav__logo-img {
    height: 38px;
    width: auto;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-light);
    transition: color 0.3s ease;
    position: relative;
}

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

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link.active-link::after {
    width: 100%;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav__toggle,
.nav__close {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-secondary);
}

/* ===== HERO ===== */
.hero {
    padding-top: 8rem;
    padding-bottom: var(--spacing-4xl);
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

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

.hero__badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-secondary);
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.hero__description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
    max-width: 520px;
}

.hero__buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.hero__stat-number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
}

.hero__stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.hero__image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--color-primary-light), #e0e7ff);
}

.hero__placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--color-primary);
    gap: var(--spacing-md);
}

.hero__placeholder i {
    font-size: 4rem;
}

.hero__placeholder span {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

/* ===== BRANDS ===== */
.brands {
    padding: var(--spacing-2xl) 0;
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.brands__title {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.brands__grid {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
}

.brands__item {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-lighter);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.brands__item:hover {
    opacity: 1;
    color: var(--color-primary);
}

.brands__logo {
    height: 40px;
    width: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.brands__item:hover .brands__logo {
    filter: grayscale(0%);
    opacity: 1;
}

/* ===== FEATURES ===== */
.features {
    background: var(--color-bg);
}

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

.feature-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
    background: var(--color-bg);
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.feature-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ===== BENEFITS ===== */
.benefits {
    background: var(--color-bg-alt);
}

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

.benefit {
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.benefit:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.benefit__number {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-primary-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

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

.benefit__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.benefit__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    background: var(--color-bg);
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 2rem;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--color-border);
    z-index: 0;
}

.step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 0 0 6px var(--color-bg), 0 0 0 8px var(--color-primary-light);
}

.step__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.step__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ===== PLANS ===== */
.plans {
    background: var(--color-bg-alt);
}

.plans__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    align-items: start;
}

.plan-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.plan-card--featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    transform: scale(1.03);
}

.plan-card--featured:hover {
    transform: scale(1.03) translateY(-4px);
}

.plan-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #fff;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

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

.plan-card__name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.plan-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.plan-card__price {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.plan-card__currency {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
}

.plan-card__amount {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
}

.plan-card__features {
    margin-bottom: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.plan-card__features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.plan-card__features li i {
    color: var(--color-success);
    font-size: 1.1rem;
}

/* ===== CTA ===== */
.cta {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: var(--spacing-4xl) 0;
}

.cta__content {
    text-align: center;
    max-width: 650px;
    margin: 0 auto;
}

.cta__title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: #fff;
    margin-bottom: var(--spacing-md);
}

.cta__description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

/* ===== CONTACT ===== */
.contact {
    background: var(--color-bg);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

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

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

.contact__item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact__item h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary);
    margin-bottom: 0.15rem;
}

.contact__item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

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

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form__label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-secondary);
}

.form__input {
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-alt);
    color: var(--color-text);
    transition: all 0.3s ease;
}

.form__input:focus {
    border-color: var(--color-primary);
    background: var(--color-bg);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form__input::placeholder {
    color: var(--color-text-lighter);
}

.form__textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-bg-dark);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand .nav__logo-text {
    color: #fff;
}

.footer__description {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-top: var(--spacing-md);
    line-height: 1.7;
    max-width: 280px;
}

.footer__links h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: #fff;
    margin-bottom: var(--spacing-md);
}

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

.footer__links a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.3s ease;
}

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

.footer__bottom {
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.4);
}

/* ===== ANIMATIONS ===== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE - TABLET ===== */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.75rem;
        --font-size-3xl: 1.75rem;
    }

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

    .hero__description {
        max-width: 100%;
    }

    .hero__buttons {
        justify-content: center;
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__image {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }

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

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

    .steps {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }

    .steps::before {
        display: none;
    }

    .plans__grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin: 0 auto;
    }

    .plan-card--featured {
        transform: none;
    }

    .plan-card--featured:hover {
        transform: translateY(-4px);
    }

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

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

/* ===== RESPONSIVE - MOBILE ===== */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }

    .section {
        padding: var(--spacing-3xl) 0;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-bg);
        box-shadow: var(--shadow-xl);
        padding: 5rem 2rem 2rem;
        transition: right 0.4s ease;
        z-index: 1001;
    }

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

    .nav__list {
        flex-direction: column;
        gap: 1.5rem;
    }

    .nav__link {
        font-size: var(--font-size-lg);
    }

    .nav__close {
        display: block;
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
    }

    .nav__toggle {
        display: block;
    }

    .nav__actions .btn {
        display: none;
    }

    .hero {
        padding-top: 6rem;
    }

    .hero__buttons {
        flex-direction: column;
    }

    .hero__stats {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }

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

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

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

    .brands__grid {
        gap: var(--spacing-md);
    }

    .brands__item {
        font-size: var(--font-size-sm);
    }

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

/* ===== RESPONSIVE - SMALL MOBILE ===== */
@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.85rem;
    }

    .container {
        padding: 0 1rem;
    }

    .hero__placeholder {
        min-height: 250px;
    }
}