/* ===== VARIABLES ===== */
:root {
    /* Colors - CodeGo Theme */
    --color-primary: #5B8A72;
    --color-primary-light: #8FB8A8;
    --color-primary-dark: #3D5C4A;
    --color-secondary: #E8B4A0;
    --color-accent: #F5D76E;

    /* Neutrals */
    --color-white: #FFFFFF;
    --color-black: #1A1A1A;
    --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;

    /* Feature colors */
    --color-green: #10B981;
    --color-coral: #F87171;
    --color-yellow: #FBBF24;
    --color-purple: #A78BFA;
    --color-blue: #60A5FA;
    --color-orange: #FB923C;
    --color-pink: #F472B6;
    --color-teal: #2DD4BF;

    /* 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;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 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;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
}

/* ===== UTILITIES ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.btn--primary {
    background-color: var(--color-gray-900);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-gray-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn--large {
    padding: var(--spacing-5) var(--spacing-10);
    font-size: var(--font-size-lg);
}

.btn__icon {
    width: 24px;
    height: 24px;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: transparent;
    transition: all var(--transition-base);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

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

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.nav__logo-img {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav__link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

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

.header:not(.scrolled) .nav__link {
    color: rgba(255, 255, 255, 0.9);
}

.header:not(.scrolled) .nav__link:hover {
    color: var(--color-white);
}

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--radius-full);
}

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

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-2);
}

.nav__toggle-bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-gray-900);
    transition: all var(--transition-fast);
}

.header:not(.scrolled) .nav__toggle-bar {
    background-color: var(--color-white);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-24) 0 var(--spacing-16);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-primary-dark) 100%);
    z-index: -1;
}

.hero__shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.hero__shape--1 {
    width: 600px;
    height: 600px;
    background: var(--color-white);
    top: -200px;
    right: -100px;
}

.hero__shape--2 {
    width: 400px;
    height: 400px;
    background: var(--color-primary-dark);
    bottom: -100px;
    left: -100px;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
    align-items: center;
}

.hero__content {
    color: var(--color-white);
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero__title-line {
    display: block;
}

.hero__title-line--highlight {
    color: var(--color-accent);
    text-shadow: 2px 2px 0 var(--color-primary-dark);
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-8);
    max-width: 500px;
}

.hero__cta {
    margin-bottom: var(--spacing-10);
}

.hero__stats {
    display: flex;
    gap: var(--spacing-10);
}

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

.hero__stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 800;
}

.hero__stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.hero__image {
    display: flex;
    justify-content: center;
}

.hero__phone {
    position: relative;
    width: 300px;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-slow);
}

.hero__phone:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero__phone-img {
    width: 100%;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}

/* ===== SCREENSHOTS ===== */
.screenshots {
    padding: var(--spacing-24) 0;
    background-color: var(--color-gray-50);
}

.screenshots__carousel {
    overflow: hidden;
    margin: 0 calc(-1 * var(--spacing-6));
    padding: var(--spacing-4) 0;
}

.screenshots__track {
    display: flex;
    gap: var(--spacing-6);
    padding: 0 var(--spacing-6);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.screenshots__track::-webkit-scrollbar {
    display: none;
}

.screenshots__slide {
    flex: 0 0 auto;
    scroll-snap-align: center;
}

.screenshots__img {
    width: 280px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-base);
}

.screenshots__img:hover {
    transform: scale(1.02);
}

/* ===== FEATURES ===== */
.features {
    padding: var(--spacing-24) 0;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

.feature {
    text-align: center;
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
}

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

.feature__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-4);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature__icon svg {
    width: 32px;
    height: 32px;
}

.feature__icon--green { background-color: #D1FAE5; color: var(--color-green); }
.feature__icon--coral { background-color: #FEE2E2; color: var(--color-coral); }
.feature__icon--yellow { background-color: #FEF3C7; color: var(--color-yellow); }
.feature__icon--purple { background-color: #EDE9FE; color: var(--color-purple); }
.feature__icon--blue { background-color: #DBEAFE; color: var(--color-blue); }
.feature__icon--orange { background-color: #FFEDD5; color: var(--color-orange); }
.feature__icon--pink { background-color: #FCE7F3; color: var(--color-pink); }
.feature__icon--teal { background-color: #CCFBF1; color: var(--color-teal); }

.feature__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.feature__description {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    line-height: 1.5;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
    padding: var(--spacing-24) 0;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
}

.how-it-works .section__title,
.how-it-works .section__subtitle {
    color: var(--color-white);
}

.how-it-works .section__subtitle {
    opacity: 0.9;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.step {
    text-align: center;
    padding: var(--spacing-8);
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(10px);
    color: var(--color-white);
}

.step__number {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-4);
    background-color: var(--color-white);
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    font-weight: 800;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.step__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-2);
}

.step__description {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* ===== TESTIMONIALS ===== */
.testimonials {
    padding: var(--spacing-24) 0;
    background-color: var(--color-gray-50);
}

.testimonials__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
}

.testimonial {
    background-color: var(--color-white);
    padding: var(--spacing-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
}

.testimonial__stars {
    color: var(--color-accent);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-4);
}

.testimonial__text {
    font-size: var(--font-size-base);
    color: var(--color-gray-700);
    line-height: 1.7;
    margin-bottom: var(--spacing-6);
}

.testimonial__author {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-gray-100);
}

.testimonial__name {
    font-weight: 600;
    color: var(--color-gray-900);
}

.testimonial__score {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
}

/* ===== FAQ ===== */
.faq {
    padding: var(--spacing-24) 0;
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-6) 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    text-align: left;
    transition: color var(--transition-fast);
}

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

.faq__icon {
    width: 24px;
    height: 24px;
    color: var(--color-gray-400);
    transition: transform var(--transition-base);
}

.faq__item.active .faq__icon {
    transform: rotate(180deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq__item.active .faq__answer {
    max-height: 300px;
}

.faq__answer p {
    padding-bottom: var(--spacing-6);
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
    padding: var(--spacing-24) 0;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.cta__content {
    text-align: center;
    color: var(--color-white);
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-4);
}

.cta__subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-8);
}

.cta__note {
    margin-top: var(--spacing-4);
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__top {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-12);
}

.footer__brand {
    max-width: 300px;
}

.footer__logo-img {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
}

.footer__tagline {
    margin-top: var(--spacing-2);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer__links {
    display: flex;
    gap: var(--spacing-16);
}

.footer__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-4);
}

.footer__list li {
    margin-bottom: var(--spacing-2);
}

.footer__list a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

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

.footer__bottom {
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .features__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero__container {
        gap: var(--spacing-8);
    }

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

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-white);
        flex-direction: column;
        justify-content: center;
        gap: var(--spacing-6);
        transition: right var(--transition-base);
        box-shadow: var(--shadow-2xl);
    }

    .nav__menu.active {
        right: 0;
    }

    .nav__link {
        font-size: var(--font-size-lg);
        color: var(--color-gray-800) !important;
    }

    .nav__toggle {
        display: flex;
        z-index: var(--z-modal);
    }

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

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

    .hero__subtitle {
        margin: 0 auto var(--spacing-8);
    }

    .hero__stats {
        justify-content: center;
    }

    .hero__phone {
        width: 250px;
        transform: none;
    }

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

    .feature {
        padding: var(--spacing-6);
    }

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

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

    .footer__top {
        flex-direction: column;
        gap: var(--spacing-8);
    }

    .footer__links {
        flex-wrap: wrap;
        gap: var(--spacing-8);
    }

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

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

@media (max-width: 480px) {
    .hero {
        padding: var(--spacing-20) 0 var(--spacing-12);
    }

    .hero__stats {
        flex-direction: column;
        gap: var(--spacing-4);
    }

    .btn {
        width: 100%;
    }

    .screenshots__img {
        width: 240px;
    }
}

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

.hero__content,
.hero__image {
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero__image {
    animation-delay: 0.2s;
}

/* Smooth scroll padding for fixed header */
html {
    scroll-padding-top: 100px;
}