:root {
    --black: #000000;
    --white: #ffffff;
    --gray: #737373;
    --gray-light: #a3a3a3;
    --border: #e5e5e5;
    --bg: #ffffff;
    --bg-alt: #fafafa;
    --bg-card: #ffffff;
    --text: #000000;
    --text-muted: #737373;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 8px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --bg-alt: #0a0a0a;
        --bg-card: #141414;
        --border: #262626;
        --text: #ffffff;
        --text-muted: #a3a3a3;
        --shadow-sm: 0 1px 2px rgba(255, 255, 255, 0.04);
        --shadow-md: 0 4px 16px rgba(255, 255, 255, 0.06);
        --shadow-lg: 0 12px 40px rgba(255, 255, 255, 0.08);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, "SF Pro Display", "Inter", "Helvetica Neue", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3, h4 {
    line-height: 1.15;
    letter-spacing: -0.025em;
}

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

/* === NAVBAR === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 40px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

@media (prefers-color-scheme: dark) {
    .navbar {
        background: rgba(0, 0, 0, 0.8);
    }
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 17px;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition);
}

.nav-links a:hover {
    color: var(--text);
}

.nav-cta {
    font-size: 14px;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: 999px;
    background: var(--black);
    color: var(--white);
    transition: var(--transition);
}

.nav-cta:hover {
    opacity: 0.85;
    transform: scale(0.98);
}

/* === HERO === */
.hero {
    padding: 180px 24px 120px;
    background: var(--bg);
}

.hero-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-sub {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 440px;
    line-height: 1.5;
}

.store-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.store-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.store-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--black);
}

.store-btn span {
    display: flex;
    flex-direction: column;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
}

.store-btn small {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-muted);
}

.store-btn.light {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.store-btn.light span,
.store-btn.light small {
    color: #fff;
}

.store-btn.light:hover {
    border-color: rgba(255, 255, 255, 0.5);
}

/* === HERO MASCOT === */
.hero-mascot {
    position: absolute;
    right: -20px;
    bottom: -20px;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--bg-card);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.hero-mascot:hover {
    transform: scale(1.08) rotate(5deg);
}

@media (max-width: 640px) {
    .hero-mascot {
        width: 80px;
        height: 80px;
        right: -10px;
        bottom: -10px;
        border-width: 2px;
    }
}

/* === APP MOCKUP === */
.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.app-mockup {
    display: flex;
    width: 380px;
    height: 440px;
    border-radius: 24px;
    overflow: hidden;
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.mockup-sidebar {
    width: 130px;
    background: var(--bg-alt);
    border-right: 1px solid var(--border);
    padding: 24px 14px;
    display: flex;
    flex-direction: column;
}

.mockup-sidebar-logo {
    margin-bottom: 28px;
}

.mockup-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mockup-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-xs);
    font-size: 13px;
    color: var(--text-muted);
    transition: var(--transition);
}

.mockup-nav-item.active {
    background: var(--black);
    color: var(--white);
    font-weight: 600;
}

.mockup-nav-item:hover:not(.active) {
    background: var(--bg);
    color: var(--text);
}

.mockup-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px 20px;
}

.mockup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.mockup-title {
    font-size: 17px;
    font-weight: 700;
}

.mockup-date {
    font-size: 13px;
    color: var(--text-muted);
}

.mockup-tasks {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mockup-task {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    font-size: 14px;
    transition: var(--transition);
}

.mockup-task:hover {
    border-color: var(--black);
}

.mockup-task.done {
    opacity: 0.4;
}

.mockup-task.done span {
    text-decoration: line-through;
}

.mockup-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border);
    flex-shrink: 0;
}

.mockup-task.done .mockup-checkbox {
    background: var(--black);
    border-color: var(--black);
}

.mockup-input {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    margin-top: 16px;
}

.mockup-input-placeholder {
    font-size: 14px;
    color: var(--text-muted);
}

.mockup-input svg {
    color: var(--black);
}

/* === SECTIONS === */
.section {
    padding: 140px 0;
}

.section-label {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.section h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 64px;
    letter-spacing: -0.03em;
}

.section-privacy {
    background: var(--bg-alt);
}

.section-features {
    background: var(--bg);
}

.section-pricing {
    background: var(--bg-alt);
}

/* === PRIVACY === */
.privacy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.privacy-card {
    background: var(--bg-card);
    padding: 40px 32px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.privacy-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--bg-alt);
    color: var(--text);
    margin-bottom: 24px;
}

.privacy-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 10px;
}

.privacy-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* === FEATURES === */
.features-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.features-menu {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.features-menu-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.features-menu-item:hover {
    border-color: var(--black);
    box-shadow: var(--shadow-sm);
}

.features-menu-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--bg-alt);
    flex-shrink: 0;
    overflow: hidden;
}

.features-menu-icon img {
    display: block;
    object-fit: cover;
}

.features-menu-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.features-menu-item p {
    font-size: 13px;
    color: var(--text-muted);
}

.features-showcase {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.showcase-card {
    padding: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    border-left: 3px solid var(--black);
}

.showcase-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
}

.showcase-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* === PRICING === */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 820px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    background: var(--bg-card);
    padding: 48px 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

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

.pricing-card.highlight {
    border-color: var(--black);
    box-shadow: var(--shadow-md);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--black);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

.pricing-header {
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.pricing-price {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.pricing-price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-alt {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 6px;
}

.pricing-features {
    list-style: none;
    flex: 1;
    margin-bottom: 36px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 14px;
    color: var(--text-muted);
}

.pricing-features li svg {
    color: var(--black);
    flex-shrink: 0;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    opacity: 0.85;
    transform: scale(0.98);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--black);
    background: var(--bg-alt);
}

/* === CTA === */
.section-cta {
    background: var(--black);
    color: var(--white);
    text-align: center;
    padding: 140px 0;
}

.section-cta h2 {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.section-cta p {
    font-size: 18px;
    opacity: 0.6;
    margin-bottom: 48px;
}

/* === FOOTER === */
footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 64px 24px 32px;
}

.footer-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color var(--transition);
}

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

.footer-contact a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color var(--transition);
}

.footer-contact a:hover {
    color: var(--text);
}

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

/* === RESPONSIVE === */
@media (max-width: 968px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 60px;
    }

    .hero-sub {
        margin-left: auto;
        margin-right: auto;
    }

    .store-buttons {
        justify-content: center;
    }

    .features-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

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

    .section {
        padding: 100px 0;
    }
}

@media (max-width: 640px) {
    .navbar {
        padding: 14px 20px;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 120px 20px 80px;
    }

    .hero-text h1 {
        font-size: 38px;
    }

    .hero-sub {
        font-size: 16px;
    }

    .section {
        padding: 80px 0;
    }

    .section h2 {
        font-size: 30px;
        margin-bottom: 40px;
    }

    .app-mockup {
        width: 320px;
        height: 380px;
    }

    .mockup-sidebar {
        width: 110px;
        padding: 20px 12px;
    }

    .store-btn {
        padding: 10px 16px;
    }

    .store-btn span {
        font-size: 13px;
    }

    .pricing-card {
        padding: 36px 28px;
    }

    .footer-grid {
        flex-direction: column;
        text-align: center;
    }
}

/* === ANIMATIONS === */
@media (prefers-reduced-motion: no-preference) {
    .hero-text h1 {
        animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .hero-sub {
        animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
    }

    .store-buttons {
        animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
    }

    .app-mockup {
        animation: fadeIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
    }

    @keyframes fadeUp {
        from { opacity: 0; transform: translateY(24px); }
        to { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: scale(0.96); }
        to { opacity: 1; transform: scale(1); }
    }

    .privacy-card,
    .features-menu-item,
    .showcase-card,
    .pricing-card {
        animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
    }

    .privacy-card:nth-child(2) { animation-delay: 0.08s; }
    .privacy-card:nth-child(3) { animation-delay: 0.16s; }
}