/* ============================================
   Gemini AI - Modern Design CSS
   Premium & Conversion-Optimized 2025
   NO TAILWIND - Pure CSS
   ============================================ */

/* === ROOT VARIABLES === */
:root {
    /* Gemini Brand Colors */
    --gemini-purple: #9168C0;
    --gemini-blue: #5684D1;
    --gemini-cyan: #1BA1E3;
    --gemini-gradient: linear-gradient(135deg, #9168C0 0%, #5684D1 50%, #1BA1E3 100%);

    /* Primary colors */
    --brand-primary: #5684D1;
    --brand-primary-dark: #4570B8;
    --brand-primary-light: #6B96DD;
    --brand-secondary: #9168C0;
    --brand-accent: #1BA1E3;
    --brand-success: #10B981;
    --brand-warning: #F59E0B;
    --brand-danger: #EF4444;

    /* Text colors */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;

    /* Background colors */
    --surface-light: #F9FAFB;
    --surface-white: #FFFFFF;

    /* Glow effects */
    --glow-purple: rgba(145, 104, 192, 0.4);
    --glow-blue: rgba(86, 132, 209, 0.4);
    --glow-cyan: rgba(27, 161, 227, 0.3);

    /* Neutral palette */
    --neutral-50: #F9FAFB;
    --neutral-100: #F3F4F6;
    --neutral-200: #E5E7EB;
    --neutral-300: #D1D5DB;
    --neutral-400: #9CA3AF;
    --neutral-500: #6B7280;
    --neutral-600: #4B5563;
    --neutral-700: #374151;
    --neutral-800: #1F2937;
    --neutral-900: #111827;

    /* Extended palette */
    --purple-50: #FAF5FF;
    --purple-100: #F3E8FF;
    --purple-300: #D8B4FE;
    --purple-400: #C084FC;
    --purple-500: #A855F7;
    --purple-600: #9333EA;
    --purple-700: #7C3AED;
    --purple-800: #6B21A8;
    --purple-900: #581C87;

    --blue-50: #EFF6FF;
    --blue-100: #DBEAFE;
    --blue-300: #93C5FD;
    --blue-400: #60A5FA;
    --blue-500: #3B82F6;
    --blue-600: #2563EB;
    --blue-700: #1D4ED8;
    --blue-800: #1E40AF;
    --blue-900: #1E3A8A;

    --cyan-50: #ECFEFF;
    --cyan-100: #CFFAFE;
    --cyan-300: #67E8F9;
    --cyan-400: #22D3EE;
    --cyan-500: #06B6D4;
    --cyan-600: #0891B2;

    --teal-400: #2DD4BF;
    --teal-500: #14B8A6;
    --teal-600: #0D9488;

    --emerald-400: #34D399;
    --emerald-500: #10B981;
    --emerald-600: #059669;
    --emerald-700: #047857;

    --amber-400: #FBBF24;
    --amber-500: #F59E0B;

    --rose-400: #FB7185;
    --rose-500: #F43F5E;
    --rose-800: #9F1239;
    --rose-900: #881337;

    --green-500: #22C55E;
    --green-600: #16A34A;
    --green-900: #14532D;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    overflow-x: hidden;
    background-color: var(--surface-white);
    color: var(--neutral-900);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

::selection {
    background-color: var(--purple-100);
    color: var(--purple-900);
}

h1, h2, h3, .heading-font {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

/* === CONTAINERS === */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-container-sm {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-container-md {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-container-lg {
    max-width: 1152px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .section-container,
    .section-container-sm,
    .section-container-md,
    .section-container-lg {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .section-container,
    .section-container-sm,
    .section-container-md,
    .section-container-lg {
        padding: 0 2rem;
    }
}

/* === HEADER === */
.site-header {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--neutral-100);
    transition: all 0.3s ease;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.header-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (min-width: 640px) {
    .header-container {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .header-container {
        padding: 0 2rem;
    }
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    transition: opacity 0.3s;
}

.brand-link:hover {
    opacity: 0.8;
}

.brand-icon {
    width: 28px;
    height: 28px;
}

.brand-name {
    font-size: 1.375rem;
    font-weight: 700;
    background: var(--gemini-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: none;
    gap: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
}

@media (min-width: 768px) {
    .main-nav {
        display: flex;
    }
}

.main-nav a {
    color: var(--neutral-600);
    transition: color 0.3s;
}

.main-nav a:hover {
    color: var(--gemini-purple);
}

.action-btn {
    background: var(--gemini-gradient);
    color: white;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(145, 104, 192, 0.3);
}

.action-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(145, 104, 192, 0.4);
}

/* === HERO SECTION === */
.landing-hero {
    background: linear-gradient(180deg, #FFFFFF 0%, var(--neutral-50) 50%, #F0F4FF 100%);
    min-height: 100vh;
    padding-top: 8rem;
    padding-bottom: 5rem;
    overflow: hidden;
    position: relative;
}

@media (min-width: 1024px) {
    .landing-hero {
        padding-top: 11rem;
        padding-bottom: 8rem;
    }
}

.hero-backdrop {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.floating-sphere {
    position: absolute;
    border-radius: 9999px;
    filter: blur(60px);
    transition: transform 0.3s ease-out;
    animation: sphere-float 25s ease-in-out infinite;
}

.sphere-primary {
    top: 4rem;
    left: 2rem;
    width: 20rem;
    height: 20rem;
    background: linear-gradient(to bottom right, rgba(145, 104, 192, 0.35), rgba(86, 132, 209, 0.3));
    animation-delay: 0s;
}

.sphere-secondary {
    top: 12rem;
    right: 4rem;
    width: 26rem;
    height: 26rem;
    background: linear-gradient(to bottom right, rgba(86, 132, 209, 0.25), rgba(27, 161, 227, 0.25));
    animation-delay: -7s;
}

.sphere-accent {
    bottom: 6rem;
    left: 30%;
    width: 22rem;
    height: 22rem;
    background: linear-gradient(to bottom right, rgba(27, 161, 227, 0.2), rgba(145, 104, 192, 0.2));
    animation-delay: -14s;
}

@keyframes sphere-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -40px) scale(1.12); }
    50% { transform: translate(-30px, 30px) scale(0.92); }
    75% { transform: translate(25px, 15px) scale(1.08); }
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(145, 104, 192, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(145, 104, 192, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    text-align: center;
    position: relative;
    z-index: 10;
}

@media (min-width: 640px) {
    .hero-wrapper {
        padding: 0 1.5rem;
    }
}

@media (min-width: 1024px) {
    .hero-wrapper {
        padding: 0 2rem;
    }
}

/* Availability Badge */
.availability-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(to right, rgba(145, 104, 192, 0.12), rgba(27, 161, 227, 0.12));
    backdrop-filter: blur(4px);
    border: 1px solid rgba(145, 104, 192, 0.25);
    color: var(--gemini-purple);
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    box-shadow: 0 8px 20px rgba(145, 104, 192, 0.15);
}

.availability-badge .status-indicator {
    position: relative;
    display: flex;
    height: 10px;
    width: 10px;
}

.availability-badge .indicator-pulse {
    position: absolute;
    display: inline-flex;
    height: 100%;
    width: 100%;
    border-radius: 9999px;
    background: var(--gemini-cyan);
    opacity: 0.75;
    animation: status-ping 1.2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.availability-badge .indicator-dot {
    position: relative;
    display: inline-flex;
    border-radius: 9999px;
    height: 10px;
    width: 10px;
    background: linear-gradient(135deg, var(--gemini-purple), var(--gemini-cyan));
}

@keyframes status-ping {
    75%, 100% {
        transform: scale(2.2);
        opacity: 0;
    }
}

.availability-badge .year-label {
    background: var(--gemini-gradient);
    color: white;
    font-size: 0.7rem;
    padding: 0.2rem 0.625rem;
    border-radius: 9999px;
    font-weight: 700;
}

/* Main Headline */
.main-headline {
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
    line-height: 1.05;
}

@media (min-width: 768px) {
    .main-headline {
        font-size: 4.5rem;
    }
}

@media (min-width: 1024px) {
    .main-headline {
        font-size: 5.5rem;
    }
}

.headline-primary {
    display: block;
    color: var(--neutral-900);
}

.headline-accent {
    position: relative;
    display: inline-block;
}

.gradient-text-flow {
    background: linear-gradient(
        90deg,
        #9168C0 0%,
        #5684D1 20%,
        #1BA1E3 40%,
        #5684D1 60%,
        #9168C0 80%,
        #5684D1 100%
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 5s linear infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.underline-decoration {
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
}

/* Hero Subtitle */
.hero-subtitle {
    font-size: 1.25rem;
    color: var(--neutral-600);
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    font-weight: 500;
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: 1.5rem;
    }
}

/* CTA Group */
.cta-group {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    justify-content: center;
    align-items: center;
}

@media (min-width: 640px) {
    .cta-group {
        flex-direction: row;
    }
}

.primary-cta {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 2.5rem;
    background: var(--gemini-gradient);
    color: white;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 1rem;
    box-shadow: 0 20px 40px rgba(145, 104, 192, 0.35);
    transition: all 0.3s;
    overflow: hidden;
}

.primary-cta:hover {
    box-shadow: 0 25px 50px rgba(145, 104, 192, 0.45);
    transform: translateY(-4px);
}

.primary-cta .cta-content {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.primary-cta .cta-arrow {
    width: 20px;
    height: 20px;
    transition: transform 0.3s;
}

.primary-cta:hover .cta-arrow {
    transform: translateX(4px);
}

.primary-cta .cta-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.primary-cta:hover .cta-glow {
    opacity: 1;
}

.secondary-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1.25rem 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    color: var(--neutral-700);
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 1rem;
    border: 2px solid var(--neutral-200);
    transition: all 0.3s;
}

.secondary-cta:hover {
    border-color: var(--gemini-purple);
    color: var(--gemini-purple);
}

.secondary-cta .cta-arrow {
    width: 20px;
    height: 20px;
    transition: transform 0.3s;
}

.secondary-cta:hover .cta-arrow {
    transform: translateY(4px);
}

/* Metrics Row */
.metrics-row {
    margin-top: 4rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

@media (min-width: 768px) {
    .metrics-row {
        gap: 5rem;
    }
}

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

.metric-value {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--neutral-900);
    font-family: 'Plus Jakarta Sans', sans-serif;
}

@media (min-width: 768px) {
    .metric-value {
        font-size: 3rem;
    }
}

.metric-value .rating-star {
    color: var(--amber-500);
}

.metric-label {
    color: var(--neutral-500);
    margin-top: 0.25rem;
    font-weight: 500;
}

/* Tech Stack */
.tech-stack {
    margin-top: 5rem;
}

.tech-label {
    font-size: 0.875rem;
    color: var(--neutral-400);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 600;
}

.tech-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .tech-items {
        gap: 2.5rem;
    }
}

.tech-badge {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--neutral-600);
    font-weight: 700;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 0.75rem;
    border: 1px solid var(--neutral-200);
    transition: all 0.3s;
}

.tech-badge:hover {
    border-color: var(--gemini-purple);
    box-shadow: 0 4px 15px rgba(145, 104, 192, 0.15);
}

.tech-icon {
    width: 36px;
    height: 36px;
    border-radius: 0.625rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.9rem;
    font-weight: 800;
}

.tech-icon-pro {
    background: linear-gradient(135deg, var(--gemini-purple), var(--purple-600));
}

.tech-icon-flash {
    background: linear-gradient(135deg, var(--gemini-blue), var(--gemini-cyan));
}

.tech-icon-nano {
    background: linear-gradient(135deg, var(--teal-500), var(--emerald-500));
}

/* Scroll Hint */
.scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-bounce 1.2s infinite;
}

.scroll-hint svg {
    width: 24px;
    height: 24px;
    color: var(--neutral-400);
}

@keyframes scroll-bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-30%);
    }
}

/* === FADE IN ANIMATIONS === */
.animate-entrance {
    animation: entrance-fade 0.9s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
    opacity: 0;
    transform: translateY(35px);
}

.delay-1 { animation-delay: 0.12s; }
.delay-2 { animation-delay: 0.24s; }
.delay-3 { animation-delay: 0.36s; }
.delay-4 { animation-delay: 0.48s; }
.delay-5 { animation-delay: 0.6s; }

@keyframes entrance-fade {
    to { opacity: 1; transform: translateY(0); }
}

/* === MODELS SECTION === */
.models-section {
    padding: 5rem 0;
    background: var(--surface-white);
}

.section-intro {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-heading {
    font-size: 2rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 1rem;
}

@media (min-width: 768px) {
    .section-heading {
        font-size: 2.5rem;
    }
}

.section-heading .accent-text {
    background: var(--gemini-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    color: var(--neutral-500);
    font-size: 1.1rem;
}

.models-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .models-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.model-card {
    position: relative;
    padding: 2rem;
    border-radius: 1.5rem;
    background: linear-gradient(180deg, #FFFFFF 0%, var(--neutral-50) 100%);
    border: 1px solid var(--neutral-200);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--gemini-purple);
}

.model-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gemini-gradient);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-icon {
    width: 64px;
    height: 64px;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.icon-gradient-purple {
    background: linear-gradient(135deg, var(--purple-100), var(--purple-200));
}

.icon-gradient-cyan {
    background: linear-gradient(135deg, var(--cyan-100), var(--blue-100));
}

.icon-gradient-green {
    background: linear-gradient(135deg, var(--emerald-100), var(--teal-100));
}

.icon-gradient-pink {
    background: linear-gradient(135deg, #FDF2F8, #FCE7F3);
}

.model-name {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 0.75rem;
}

.model-desc {
    color: var(--neutral-600);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.model-features {
    list-style: none;
    text-align: left;
}

.model-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--neutral-700);
    border-top: 1px solid var(--neutral-100);
}

.model-features .checkmark {
    color: var(--gemini-cyan);
    font-weight: 700;
}

/* === VERSUS SECTION === */
.versus-section {
    padding: 4rem 0;
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-100);
    border-bottom: 1px solid var(--neutral-100);
}

.versus-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.versus-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--neutral-900);
}

@media (min-width: 768px) {
    .versus-title {
        font-size: 2rem;
    }
}

.versus-title .accent-text {
    background: var(--gemini-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.versus-subtitle {
    color: var(--neutral-500);
    margin-top: 0.5rem;
}

.versus-cards {
    display: grid;
    gap: 1.5rem;
}

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

.versus-card {
    position: relative;
    padding: 2rem;
    border-radius: 1.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.versus-negative {
    background: linear-gradient(135deg, #FEF2F2 0%, #FEE2E2 100%);
    border: 1px solid #FECACA;
}

.versus-positive {
    background: linear-gradient(135deg, var(--purple-50) 0%, var(--blue-50) 100%);
    border: 2px solid var(--gemini-purple);
    box-shadow:
        0 8px 30px rgba(145, 104, 192, 0.15),
        0 0 0 4px rgba(145, 104, 192, 0.05);
}

.versus-positive:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow:
        0 20px 50px rgba(145, 104, 192, 0.2),
        0 0 0 4px rgba(145, 104, 192, 0.1);
}

.versus-ribbon {
    position: absolute;
    top: 0;
    right: 1.5rem;
    background: var(--gemini-gradient);
    color: white;
    padding: 0.625rem 1.25rem;
    border-radius: 0 0 1rem 1rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(145, 104, 192, 0.3);
}

.versus-card-heading {
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.versus-card-heading svg {
    width: 20px;
    height: 20px;
    margin-right: 0.5rem;
}

.versus-negative .versus-card-heading {
    color: var(--rose-800);
}

.versus-positive .versus-card-heading {
    color: var(--purple-800);
}

.versus-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    font-size: 0.875rem;
}

.versus-negative .versus-list {
    color: var(--rose-900);
}

.versus-positive .versus-list {
    color: var(--neutral-700);
}

.versus-list li {
    display: flex;
    gap: 0.5rem;
}

.versus-list li span.success-mark {
    color: var(--gemini-cyan);
    font-weight: 700;
    font-size: 1.125rem;
}

.versus-action {
    margin-top: 1.5rem;
    display: block;
    width: 100%;
    text-align: center;
    background: var(--gemini-gradient);
    color: white;
    padding: 0.875rem;
    border-radius: 0.75rem;
    font-weight: 700;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(145, 104, 192, 0.3);
}

.versus-action:hover {
    box-shadow: 0 8px 25px rgba(145, 104, 192, 0.4);
    transform: translateY(-2px);
}

/* === BENEFITS SECTION === */
.benefits-section {
    padding: 5rem 0;
    background: var(--surface-white);
}

.benefits-header {
    text-align: center;
    margin-bottom: 4rem;
}

.benefits-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 1rem;
}

@media (min-width: 768px) {
    .benefits-title {
        font-size: 2.5rem;
    }
}

.benefits-subtitle {
    font-size: 1.125rem;
    color: var(--neutral-600);
}

.benefits-grid {
    display: grid;
    gap: 2rem;
}

@media (min-width: 768px) {
    .benefits-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.benefit-card {
    position: relative;
    padding: 2.5rem 2rem;
    border-radius: 1.5rem;
    background: linear-gradient(180deg, #FFFFFF 0%, var(--neutral-50) 100%);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gemini-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.benefit-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(145, 104, 192, 0.03) 0%, rgba(27, 161, 227, 0.03) 100%);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.benefit-card:hover {
    transform: translateY(-12px);
    box-shadow:
        0 25px 50px -12px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(145, 104, 192, 0.1);
    border-color: transparent;
}

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

.benefit-card:hover::after {
    opacity: 1;
}

.benefit-icon {
    width: 72px;
    height: 72px;
    border-radius: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--purple-50) 0%, var(--blue-50) 100%);
    box-shadow:
        0 4px 12px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.benefit-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--neutral-900);
}

.benefit-card p {
    color: var(--neutral-600);
    line-height: 1.7;
}

.benefit-card .status-badge {
    margin-top: 1.25rem;
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    border: 1px solid #86EFAC;
    color: #166534;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge .pulse-dot {
    width: 6px;
    height: 6px;
    background: currentColor;
    border-radius: 50%;
    animation: dot-pulse 2s infinite;
}

@keyframes dot-pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

/* === SCROLL REVEAL === */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === ABILITIES SECTION (DARK) === */
.abilities-section {
    padding: 5rem 0;
    background: var(--neutral-900);
    color: white;
    overflow: hidden;
    position: relative;
}

.abilities-glow {
    position: absolute;
    top: 0;
    right: 0;
    width: 28rem;
    height: 28rem;
    background: rgba(145, 104, 192, 0.25);
    filter: blur(120px);
    border-radius: 9999px;
}

.abilities-wrapper {
    position: relative;
    z-index: 10;
}

.abilities-heading {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 3rem;
    text-align: center;
}

@media (min-width: 768px) {
    .abilities-heading {
        font-size: 2.5rem;
    }
}

.abilities-layout {
    display: grid;
    gap: 3rem;
    align-items: center;
}

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

.abilities-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.ability-row {
    display: flex;
    gap: 1rem;
}

.ability-icon {
    width: 52px;
    height: 52px;
    border-radius: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

.ability-icon-text {
    background: linear-gradient(135deg, var(--gemini-purple), var(--purple-600));
}

.ability-icon-image {
    background: linear-gradient(135deg, var(--gemini-blue), var(--gemini-cyan));
}

.ability-icon-code {
    background: linear-gradient(135deg, var(--teal-500), var(--emerald-500));
}

.ability-row h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.ability-row p {
    color: var(--neutral-300);
    line-height: 1.7;
}

/* Preview Card */
.preview-card {
    background: var(--neutral-800);
    border-radius: 1.5rem;
    padding: 1.75rem;
    border: 1px solid var(--neutral-700);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}

.preview-input {
    background: var(--neutral-900);
    border-radius: 0.75rem;
    padding: 1rem;
    margin-bottom: 1rem;
    color: var(--neutral-300);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    border: 1px solid var(--neutral-700);
}

.preview-output {
    background: rgba(145, 104, 192, 0.15);
    border-radius: 0.75rem;
    padding: 1.25rem;
    color: white;
    font-size: 0.875rem;
    line-height: 1.7;
    border: 1px solid rgba(145, 104, 192, 0.3);
}

.preview-title {
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--purple-300);
}

.preview-action {
    margin-top: 1.5rem;
    text-align: center;
}

.preview-action a {
    display: block;
    width: 100%;
    background: white;
    color: var(--neutral-900);
    padding: 0.875rem 1.5rem;
    border-radius: 0.625rem;
    font-weight: 700;
    transition: all 0.3s;
}

.preview-action a:hover {
    background: var(--neutral-100);
    transform: translateY(-2px);
}

/* === INSTRUCTION SECTION === */
.instruction-section {
    padding: 5rem 0;
    background: var(--neutral-50);
}

.instruction-layout {
    display: grid;
    gap: 3rem;
    align-items: center;
}

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

.instruction-content {
    order: 2;
}

@media (min-width: 768px) {
    .instruction-content {
        order: 1;
    }
}

.instruction-heading {
    font-size: 2rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 2rem;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step-row {
    display: flex;
    gap: 1rem;
}

.step-marker {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 9999px;
    background: var(--gemini-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    box-shadow: 0 4px 10px rgba(145, 104, 192, 0.3);
}

.step-row h4 {
    font-weight: 700;
    color: var(--neutral-900);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.step-row p {
    color: var(--neutral-600);
    line-height: 1.6;
}

/* Demo Window */
.demo-window {
    order: 1;
    background: white;
    padding: 1.75rem;
    border-radius: 1.25rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--neutral-100);
    transform: rotate(2deg);
    transition: transform 0.5s;
}

@media (min-width: 768px) {
    .demo-window {
        order: 2;
    }
}

.demo-window:hover {
    transform: rotate(0deg);
}

.demo-input-field {
    background: var(--neutral-100);
    border-radius: 0.625rem;
    padding: 1rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--neutral-500);
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.demo-skeleton {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skeleton-bar {
    height: 8px;
    background: var(--neutral-200);
    border-radius: 4px;
    animation: skeleton-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.skeleton-full { width: 100%; }
.skeleton-medium { width: 80%; }
.skeleton-short { width: 60%; }

@keyframes skeleton-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.demo-response {
    font-size: 0.875rem;
    color: var(--neutral-800);
    font-weight: 500;
    margin-top: 1.25rem;
    line-height: 1.7;
}

/* === PROMPTS SECTION === */
.prompts-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--surface-white) 0%, var(--purple-50) 100%);
}

.prompts-header {
    text-align: center;
    margin-bottom: 3rem;
}

.prompts-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 0.75rem;
}

.prompts-subtitle {
    color: var(--neutral-500);
    font-size: 1.1rem;
}

.prompts-grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .prompts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.prompt-card {
    background: white;
    padding: 1.75rem;
    border-radius: 1.25rem;
    border: 1px solid var(--neutral-200);
    transition: all 0.3s;
}

.prompt-card:hover {
    border-color: var(--gemini-purple);
    box-shadow: 0 10px 30px rgba(145, 104, 192, 0.12);
    transform: translateY(-4px);
}

.prompt-category {
    display: inline-block;
    background: var(--gemini-gradient);
    color: white;
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.prompt-text {
    color: var(--neutral-700);
    font-size: 0.95rem;
    line-height: 1.65;
    font-style: italic;
}

/* === FAQ SECTION === */
.faq-block {
    padding: 5rem 0;
    background: var(--surface-white);
}

.faq-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.faq-heading {
    font-size: 2rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 1rem;
}

@media (min-width: 768px) {
    .faq-heading {
        font-size: 2.5rem;
    }
}

.faq-subheading {
    color: var(--neutral-500);
}

.faq-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-panel {
    background: linear-gradient(180deg, #FFFFFF 0%, var(--neutral-50) 100%);
    border-radius: 1.25rem;
    padding: 0;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    overflow: hidden;
}

.faq-panel:hover {
    border-color: rgba(145, 104, 192, 0.3);
    box-shadow: 0 8px 24px rgba(145, 104, 192, 0.08);
}

.faq-panel[open] {
    background: linear-gradient(135deg, var(--purple-50) 0%, var(--surface-white) 100%);
    border-color: var(--gemini-purple);
    box-shadow: 0 12px 32px rgba(145, 104, 192, 0.12);
}

.faq-trigger {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    gap: 1rem;
    padding: 1.5rem 1.75rem;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.faq-trigger::-webkit-details-marker {
    display: none;
}

.faq-chevron {
    color: var(--gemini-purple);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.faq-panel[open] .faq-chevron {
    transform: rotate(180deg);
}

.faq-content {
    padding: 0 1.75rem 1.5rem 1.75rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

.faq-action {
    margin-top: 3rem;
    text-align: center;
}

.pulse-cta {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gemini-gradient);
    color: white;
    padding: 1.125rem 2.25rem;
    border-radius: 1rem;
    font-weight: 700;
    font-size: 1.1rem;
    border: none;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 24px rgba(145, 104, 192, 0.35);
}

.pulse-cta:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 16px 40px rgba(145, 104, 192, 0.45);
}

.pulse-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transition: left 0.6s ease;
}

.pulse-cta:hover::before {
    left: 100%;
}

.pulse-cta .arrow-icon {
    transition: transform 0.3s;
}

.pulse-cta:hover .arrow-icon {
    transform: translateX(4px);
}

/* === SEO CONTENT SECTION === */
.seo-block {
    padding: 4rem 0;
    background: var(--surface-white);
    color: var(--neutral-700);
    border-top: 1px solid var(--neutral-100);
}

.seo-wrapper {
    max-width: 896px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .seo-wrapper {
        padding: 0 1.5rem;
    }
}

.seo-wrapper h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--neutral-900);
    margin-bottom: 1.5rem;
}

.seo-wrapper h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.seo-wrapper p {
    margin-bottom: 1rem;
    line-height: 1.85;
    font-size: 1.1rem;
}

.seo-wrapper ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.seo-wrapper li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.seo-wrapper li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--gemini-gradient);
    border-radius: 50%;
}

.seo-cta-wrapper {
    margin-top: 2rem;
    padding: 1.75rem;
    background: linear-gradient(to right, var(--purple-50), rgba(27, 161, 227, 0.05));
    border-radius: 1rem;
    border: 1px solid var(--purple-100);
}

.seo-cta-wrapper p:first-child {
    font-weight: 800;
    color: var(--purple-800);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.seo-cta-wrapper p:nth-child(2) {
    color: var(--purple-900);
    margin-bottom: 1rem;
}

.seo-cta-wrapper a {
    display: inline-block;
    background: var(--gemini-gradient);
    color: white;
    padding: 0.875rem 1.75rem;
    border-radius: 0.75rem;
    font-weight: 700;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(145, 104, 192, 0.3);
}

.seo-cta-wrapper a:hover {
    box-shadow: 0 10px 25px rgba(145, 104, 192, 0.4);
    transform: translateY(-2px);
}

/* === FOOTER === */
.site-footer {
    background: var(--neutral-50);
    border-top: 1px solid var(--neutral-200);
    padding: 3rem 0 2rem;
    margin-top: auto;
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
    }
}

@media (min-width: 640px) {
    .footer-container {
        padding: 0 1.5rem;
    }
}

.footer-brand-block {
    text-align: center;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .footer-brand-block {
        text-align: left;
        margin-bottom: 0;
    }
}

.footer-brand {
    font-weight: 700;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    background: var(--gemini-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .footer-brand {
        justify-content: flex-start;
    }
}

.footer-brand svg {
    width: 24px;
    height: 24px;
}

.footer-desc {
    font-size: 0.875rem;
    color: var(--neutral-500);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.footer-links a {
    color: var(--neutral-500);
    transition: color 0.3s;
}

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

.footer-legal {
    text-align: center;
    font-size: 0.75rem;
    color: var(--neutral-400);
    margin-top: 2.5rem;
    border-top: 1px solid var(--neutral-200);
    padding-top: 1.5rem;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* === HOVER EFFECTS === */
.interactive-lift {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.interactive-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

/* === GLASSMORPHISM === */
.glass-effect {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gemini-gradient);
    border-radius: 5px;
    border: 2px solid var(--neutral-100);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gemini-purple);
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* === FOCUS STATES === */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--gemini-purple);
    outline-offset: 3px;
    border-radius: 8px;
}

/* === MOBILE === */
@media (max-width: 768px) {
    .landing-hero {
        min-height: auto;
        padding-bottom: 60px;
    }

    .benefit-card {
        padding: 1.75rem 1.5rem;
    }

    .versus-card {
        padding: 1.5rem;
    }
}

/* === LOADING SKELETON === */
.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
    border-radius: 8px;
}

@keyframes loading-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}