/**
 * Everkept Landing Page - Core Stylesheet
 * 
 * Vibe: Unified, high-end, serious, professional, authoritative, perfectly balanced.
 * Minimalist, matte gold line art, charcoal-black and textured cream-white.
 */

/* =========================================
   Design Tokens & CSS Variables
   ========================================= */
:root {
    /* Colors */
    --clr-gold: #D4AF37;
    /* Matte Gold */
    --clr-charcoal: #111111;
    /* Deep charcoal-black */
    --clr-cream: #F8F5F2;
    /* Textured cream-white paper */
    --clr-offwhite: #FAFAF8;
    /* Soft off-white */
    --clr-surface-light: #FFFFFF;
    /* Pure white for cards */
    --clr-border: rgba(212, 175, 55, 0.3);
    /* Soft gold border */

    /* Typography */
    --font-serif: 'Newsreader', serif;
    --font-sans: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    /* 8px */
    --spacing-sm: 1rem;
    /* 16px */
    --spacing-md: 2rem;
    /* 32px */
    --spacing-lg: 4rem;
    /* 64px */
    --spacing-xl: 6rem;
    /* 96px */
    --spacing-xxl: 8rem;
    /* 128px */

    /* Transitions */
    --transition-fast: 0.2s ease-in-out;
    --transition-medium: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================
   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-serif);
    background-color: var(--clr-offwhite);
    color: var(--clr-charcoal);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img,
svg {
    max-width: 100%;
    display: block;
}

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

ul {
    list-style: none;
}

/* =========================================
   Typography Utilities
   ========================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.section-headline {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

.section-headline.dark-bg {
    color: var(--clr-offwhite);
}

.section-description {
    font-size: 1.125rem;
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.section-description.dark-bg {
    color: rgba(250, 250, 248, 0.9);
}

.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: var(--spacing-sm);
}

.mb-8 {
    margin-bottom: var(--spacing-md);
}

.mb-12 {
    margin-bottom: var(--spacing-lg);
}

.mt-8 {
    margin-top: var(--spacing-md);
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.max-w-3xl {
    max-width: 48rem;
}

/* =========================================
   Layout & Container
   ========================================= */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

@media (min-width: 768px) {
    section {
        padding: var(--spacing-xxl) 0;
    }
}

/* =========================================
   Components
   ========================================= */

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 1rem 2rem;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: none;
    outline: none;
    border-radius: 4px;
    /* Sharp corners/slightly rounded to preference, requested rectangular */
}

.button-gold {
    background-color: var(--clr-gold);
    color: var(--clr-charcoal);
}

.button-gold:hover {
    background-color: #e6c55c;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.2);
}

.button-gold-outline {
    background-color: transparent;
    color: var(--clr-gold);
    border: 1px solid var(--clr-gold);
}

.button-gold-outline:hover {
    background-color: rgba(212, 175, 55, 0.05);
    transform: translateY(-2px);
}

/* Icons */
.section-icon {
    width: 48px;
    height: 48px;
    color: var(--clr-gold);
    margin: 0 auto;
}

/* =========================================
   Global Header
   ========================================= */
.global-header {
    background-color: var(--clr-offwhite);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    transition: all var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.global-header.scrolled {
    background-color: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(17, 17, 17, 0.05);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

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

.logo-text {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.15em;
    color: var(--clr-charcoal);
}

.main-nav {
    display: none;
}

@media (min-width: 1024px) {
    .main-nav {
        display: flex;
        gap: 2.5rem;
        align-items: center;
    }

    .main-nav a {
        font-family: var(--font-sans);
        font-size: 0.8125rem;
        font-weight: 600;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        color: var(--clr-charcoal);
        position: relative;
    }

    .main-nav a::after {
        content: '';
        position: absolute;
        width: 0;
        height: 2px;
        bottom: -4px;
        left: 0;
        background-color: var(--clr-gold);
        transition: width var(--transition-fast);
    }

    .main-nav a:hover::after {
        width: 100%;
    }
}

.header-cta {
    display: none;
}

@media (min-width: 1024px) {
    .header-cta {
        display: block;
    }
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 101;
}

.menu-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--clr-charcoal);
    transition: all var(--transition-fast);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

/* Mobile Navigation */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--clr-offwhite);
    z-index: 99;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-medium);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    text-align: center;
}

.mobile-nav a:not(.button) {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--clr-charcoal);
}

.mobile-cta {
    margin-top: 2rem;
}

/* Toggle Animation */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    background-color: var(--clr-offwhite);
    padding-top: 100px;
    padding-bottom: 40px;
    /* Offset for header */
    min-height: auto;
    display: flex;
    align-items: center;
    background-image: radial-gradient(circle at 100% 0%, rgba(212, 175, 55, 0.05) 0%, transparent 40%);
}

@media (min-width: 1024px) {
    .hero {
        padding-top: 140px;
        min-height: 100vh;
        padding-bottom: 0px;
    }
}

.hero-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
    text-align: center;
}

@media (min-width: 1024px) {
    .hero-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
}

.hero-headline {
    font-size: clamp(2rem, 8vw, 4.5rem);
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero-subtext {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--clr-charcoal);
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    max-width: 500px;
    opacity: 0.8;
}

@media (min-width: 768px) {
    .hero-subtext {
        font-size: 1.125rem;
        margin-bottom: var(--spacing-lg);
        line-height: 1.7;
    }
}

/* Video Embed Styling */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    width: 100%;
}

/* Phone Mockup Styling */
.phone-mockup {
    width: 200px;
    height: 400px;
    background-color: var(--clr-charcoal);
    border-radius: 32px;
    padding: 8px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 2;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32px;
}

@media (min-width: 768px) {
    .phone-mockup {
        width: 280px;
        height: 560px;
        padding: 12px;
    }
}

/* Video Embed Styling for Promo Section */

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    background-color: var(--clr-charcoal);
    border-radius: 24px;
    padding: 8px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
    z-index: 2;
    border: 1px solid rgba(212, 175, 55, 0.3);
    /* Subtle gold border */
    overflow: hidden;
    aspect-ratio: 16 / 9;
}

@media (min-width: 768px) {
    .video-container {
        padding: 12px;
        border-radius: 32px;
    }
}

.video-container iframe {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    object-fit: cover;
}

@media (min-width: 768px) {
    .video-container iframe {
        border-radius: 24px;
    }
}

.gold-accent-icons {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 140%;
    height: 140%;
    pointer-events: none;
    z-index: 1;
}

.gold-accent-icons .accent-icon {
    position: absolute;
    width: 64px;
    height: 64px;
    color: var(--clr-gold);
    opacity: 0.2;
}

.gold-accent-icons .accent-icon.key {
    top: 10%;
    right: 10%;
    transform: rotate(15deg);
}

/* =========================================
   "PROMO VIDEO" Section
   ========================================= */
.promo-video-section {
    background-color: var(--clr-charcoal);
    color: var(--clr-offwhite);
    padding: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
    .promo-video-section {
        padding: var(--spacing-xxl) 0;
    }
}

.promo-video-section .section-headline {
    color: var(--clr-offwhite);
}

/* =========================================
   "WHY EVERKEPT" - Privacy Section
   ========================================= */
.privacy {
    background-color: var(--clr-charcoal);
    color: var(--clr-offwhite);
}

.gold-statement {
    font-family: var(--font-sans);
    color: var(--clr-gold);
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

/* =========================================
   "CORE FEATURES" - Grid Section
   ========================================= */
.features {
    background-color: var(--clr-cream);
    /* Using textured cream */
    background-image: url('data:image/svg+xml,%3Csvg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="%23111111" fill-opacity="0.02" fill-rule="evenodd"%3E%3Ccircle cx="3" cy="3" r="1"/%3E%3Ccircle cx="13" cy="13" r="1"/%3E%3C/g%3E%3C/svg%3E');
    /* Subtle texture mask */
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
}

.feature-card {
    background-color: var(--clr-surface-light);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    border-top: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    border-top-color: var(--clr-gold);
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: var(--clr-gold);
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--clr-charcoal);
}

.feature-text {
    font-size: 1rem;
    color: rgba(17, 17, 17, 0.7);
}

/* =========================================
   "APP SHOWCASE" Section
   ========================================= */
.app-showcase {
    background-color: var(--clr-offwhite);
    overflow: hidden;
}

.showcase-description {
    line-height: 1.8;
}

.showcase-carousel-wrapper {
    position: relative;
    width: 100vw;
    margin-left: 50%;
    transform: translateX(-50%);
}

.showcase-carousel {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    scrollbar-width: none;
    /* Firefox */
}

.showcase-carousel::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari/Edge */
}

.showcase-item {
    flex: 0 0 calc(80vw - 2rem);
    scroll-snap-align: center;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    position: relative;
    max-width: 300px;
    border: 1px solid rgba(212, 175, 55, 0.15);
    /* Soft gold border */
}

@media (min-width: 768px) {
    .showcase-item {
        flex: 0 0 300px;
    }
}

@media (min-width: 1024px) {
    .showcase-carousel {
        padding-left: calc((100vw - 1280px) / 2 + var(--spacing-md));
        padding-right: var(--spacing-md);
    }
}

.showcase-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* =========================================
   "TESTIMONIALS & TRUST" Section
   ========================================= */
.testimonials {
    background-color: var(--clr-charcoal);
    color: var(--clr-offwhite);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.testimonial-card {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--clr-border);
    padding: var(--spacing-lg);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
}

.stars {
    color: var(--clr-gold);
    font-size: 1.25rem;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-sm);
}

.quote {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-style: italic;
    font-weight: 300;
    line-height: 1.8;
    flex-grow: 1;
    margin-bottom: var(--spacing-md);
}

.author {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--clr-gold);
}

/* =========================================
   "DATA SAFETY & PROMISE" Section
   ========================================= */
.promise {
    background-color: var(--clr-offwhite);
}

.promise-list {
    max-width: 600px;
    margin: 0 auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.promise-list li {
    font-family: var(--font-sans);
    font-size: 1.125rem;
    color: var(--clr-charcoal);
    padding-left: 2rem;
    position: relative;
    line-height: 1.6;
}

.promise-list li::before {
    content: ', ';
    position: absolute;
    left: 0;
    color: var(--clr-gold);
    font-weight: 700;
}

/* =========================================
   "GET ACCESS" - CTA Section
   ========================================= */
.cta-section {
    background-color: var(--clr-cream);
    padding: var(--spacing-xxl) 0;
}

.cta-subtext {
    font-family: var(--font-sans);
    font-size: 1.25rem;
    color: rgba(17, 17, 17, 0.7);
}

.cta-main-button {
    font-size: 1rem;
    padding: 1.25rem 3rem;
}

/* =========================================
   Footer
   ========================================= */
.global-footer {
    background-color: var(--clr-charcoal);
    color: var(--clr-offwhite);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    opacity: 0.8;
}

.footer-links a:hover {
    color: var(--clr-gold);
}

.separator {
    color: var(--clr-border);
}

.footer-logo {
    display: flex;
    justify-content: center;
}

.copyright {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    opacity: 0.5;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* =========================================
   Animations & Utilities
   ========================================= */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.delay-1 {
    transition-delay: 0.2s;
}