/* ==========================================
   I Trusty Influencer Partnership Landing Page
   Modern, Minimal Design
   ========================================== */

/* ==========================================
   CSS Variables & Reset
   ========================================== */
:root {
    /* Colors */
    --color-primary: #9CAF88;
    --color-secondary: #E8DCC4;
    --color-accent: #C9B8A8;
    --color-bg: #FFFFFF;
    --color-text: #2C3E50;
    --color-text-light: #5A6C7D;
    --color-border: #E0E0E0;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #9CAF88 0%, #E8DCC4 100%);
    --gradient-card: linear-gradient(135deg, rgba(156, 175, 136, 0.05) 0%, rgba(232, 220, 196, 0.05) 100%);
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 80px;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 36px;
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 20px;
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--color-accent);
}

/* ==========================================
   Header
   ========================================== */
#header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

#header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-desktop {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-desktop a {
    font-weight: 500;
    color: var(--color-text);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: var(--transition);
}

.nav-desktop a:hover {
    background: var(--gradient-card);
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    color: var(--color-text);
}

.mobile-menu a:hover {
    background: var(--gradient-card);
    color: var(--color-primary);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    background: var(--gradient-hero);
    padding: var(--spacing-xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    color: var(--color-bg);
    margin-bottom: var(--spacing-sm);
    font-size: 48px;
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 20px;
    margin-bottom: var(--spacing-lg);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    font-size: 16px;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

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

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

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

/* ==========================================
   Partnership Models Section
   ========================================== */
.partnership-models {
    padding: var(--spacing-xl) 0;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.model-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
    transform: scaleX(0);
    transition: var(--transition);
}

.model-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

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

.card-header {
    margin-bottom: var(--spacing-md);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--gradient-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.benefits-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.benefits-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.benefits-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.note-section {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    border-left: 4px solid var(--color-primary);
}

/* ==========================================
   Calculator Section
   ========================================== */
.calculator-section {
    background: linear-gradient(180deg, rgba(156, 175, 136, 0.03) 0%, rgba(232, 220, 196, 0.03) 100%);
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--color-text-light);
    font-size: 18px;
}

.tab-switcher {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 14px 28px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text);
    transition: var(--transition);
    font-size: 16px;
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tab-btn.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
}

.calculator-content {
    display: none;
    background: var(--color-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.calculator-content.active {
    display: block;
}

.calculator-inputs {
    margin-bottom: var(--spacing-lg);
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.input-field, .form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 16px;
    transition: var(--transition);
    font-family: var(--font-primary);
}

.input-field:focus, .form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(156, 175, 136, 0.1);
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 5px;
    background: var(--color-border);
    outline: none;
    margin-bottom: var(--spacing-xs);
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: var(--transition);
}

.slider::-webkit-slider-thumb:hover {
    background: var(--color-accent);
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.slider::-moz-range-thumb:hover {
    background: var(--color-accent);
    transform: scale(1.1);
}

.number-input {
    width: 100px;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    margin-left: var(--spacing-sm);
}

.advanced-options {
    margin-top: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.accordion-btn {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--gradient-card);
    border: none;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--color-text);
    transition: var(--transition);
}

.accordion-btn:hover {
    background: var(--color-secondary);
}

.accordion-btn svg {
    transition: var(--transition);
}

.accordion-btn.active svg {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 var(--spacing-sm);
}

.accordion-content.active {
    max-height: 200px;
    padding: var(--spacing-sm);
}

.tooltip {
    display: inline-block;
    width: 18px;
    height: 18px;
    background: var(--color-primary);
    color: var(--color-bg);
    border-radius: 50%;
    text-align: center;
    font-size: 12px;
    font-weight: bold;
    cursor: help;
    margin-left: 5px;
}

/* ==========================================
   Results Display
   ========================================== */
.results-display {
    background: var(--gradient-card);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
}

.results-display h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.result-section {
    margin-bottom: var(--spacing-md);
}

.result-section h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: 8px;
    margin-bottom: var(--spacing-xs);
}

.result-label {
    font-weight: 500;
    color: var(--color-text-light);
}

.result-value {
    font-weight: 700;
    font-size: 20px;
    color: var(--color-primary);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    margin: var(--spacing-xs) 0;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-hero);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.annual-projection {
    background: var(--gradient-hero);
    color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    margin-top: var(--spacing-md);
}

.annual-projection h4 {
    color: var(--color-bg);
    margin-bottom: var(--spacing-xs);
}

.annual-projection .result-value {
    color: var(--color-bg);
    font-size: 32px;
}

.disclaimer {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
    font-style: italic;
}

.calculator-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ==========================================
   About Section
   ========================================== */
.about-section {
    padding: var(--spacing-xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.about-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.company-info {
    background: var(--gradient-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--color-primary);
}

.company-info h3 {
    margin-bottom: var(--spacing-sm);
}

.info-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.info-list li {
    padding: var(--spacing-xs) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.mission-card {
    background: var(--gradient-hero);
    color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

.mission-card h3 {
    color: var(--color-bg);
    margin-bottom: var(--spacing-sm);
}

.mission-card p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 18px;
    line-height: 1.6;
}

.services h3 {
    margin-bottom: var(--spacing-md);
}

.service-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--gradient-card);
    border-radius: 8px;
    transition: var(--transition);
}

.service-item:hover {
    box-shadow: var(--shadow-sm);
}

.service-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.service-text h4 {
    margin-bottom: var(--spacing-xs);
}

.service-text p {
    color: var(--color-text-light);
    font-size: 14px;
}

/* ==========================================
   Success Stories Section
   ========================================== */
.success-section {
    background: linear-gradient(180deg, rgba(156, 175, 136, 0.03) 0%, rgba(232, 220, 196, 0.03) 100%);
    padding: var(--spacing-xl) 0;
}

.success-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.success-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    position: relative;
    transition: var(--transition);
}

.success-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.quote-icon {
    font-size: 60px;
    color: var(--color-secondary);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
    font-family: Georgia, serif;
}

.success-card h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.project-type {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.result {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.quote {
    font-style: italic;
    color: var(--color-text);
    border-left: 3px solid var(--color-primary);
    padding-left: var(--spacing-sm);
}

.revenue-examples {
    max-width: 700px;
    margin: var(--spacing-lg) auto 0;
    background: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.revenue-examples h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.example-item {
    margin-bottom: var(--spacing-md);
}

.example-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.example-header span {
    font-weight: 600;
}

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

.percentage {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
    display: block;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-section {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.contact-info-card, .contact-form-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.contact-info-card h3, .contact-form-card h3 {
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--gradient-card);
    border-radius: 8px;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--color-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.contact-text strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.contact-text p {
    margin: 0;
    color: var(--color-text-light);
}

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

.contact-text a:hover {
    text-decoration: underline;
}

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

textarea.form-input {
    resize: vertical;
    min-height: 120px;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--color-text);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-logo img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-md);
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.footer-nav a:hover {
    color: var(--color-bg);
}

.footer-website a {
    color: var(--color-primary);
    font-weight: 600;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 968px) {
    h1 {
        font-size: 36px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-desktop {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    h1 {
        font-size: 32px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .model-card {
        padding: var(--spacing-md);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .success-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .tab-switcher {
        flex-direction: column;
    }
    
    .tab-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    h1 {
        font-size: 28px;
    }
    
    h2 {
        font-size: 22px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 28px;
    }
}

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

@keyframes countUp {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ==========================================
   Utility Classes
   ========================================== */
.text-center {
    text-align: center;
}

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

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