/* ===================================
   KDS Partner Signup - Landing + Form
   Consistent with KDS Design System
   =================================== */

/* Inline SVG icon utility */
.icon-inline {
    display: inline-block;
    vertical-align: middle;
    margin-right: 4px;
    flex-shrink: 0;
}

/* Variables - Matching KDS Design */
:root {
    /* Colores principales - Basados en logo KDS */
    --primary: #1a5f7a;
    --primary-hover: #0f3d4f;
    --primary-light: #d4e9f0;
    
    --secondary: #57cc99;
    --success: #57cc99;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #2d8baa;
    --gold: #d97706;
    
    /* Grises */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Backgrounds */
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    
    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* Bordes y sombras */
    --border: #e2e8f0;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Espaciado */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    
    /* Transiciones */
    --transition: all 0.2s ease;
    --transition-slow: all 0.3s ease;
}

/* Reset y base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
    vertical-align: middle;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.hidden {
    display: none !important;
}

/* ===================================
   HEADER
   =================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
}

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

.logo-accent {
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    text-decoration: none;
    padding: 8px 18px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: white;
    background: var(--primary);
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.nav-link-secondary {
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link-secondary:hover {
    color: var(--primary);
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    padding: calc(64px + var(--spacing-4xl)) var(--spacing-lg) var(--spacing-3xl);
    background: linear-gradient(135deg, var(--primary) 0%, #0f3d4f 50%, #1a5f7a 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-3xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(87, 204, 153, 0.15) 0%, transparent 60%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(45, 139, 170, 0.2) 0%, transparent 60%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 560px;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(87, 204, 153, 0.2);
    border: 1px solid rgba(87, 204, 153, 0.3);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    color: var(--secondary);
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.btn-hero {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 28px;
    background: var(--secondary);
    color: var(--gray-900);
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.btn-hero:hover {
    background: #4aba88;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(87, 204, 153, 0.35);
}

.btn-hero .icon {
    width: 22px;
    height: 22px;
}

/* Hero Visual Card */
.hero-visual {
    position: relative;
    z-index: 1;
}

.hero-card {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    min-width: 280px;
    text-align: center;
}

.hero-card-header {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
    margin-bottom: var(--spacing-sm);
}

.hero-card-amount {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: var(--spacing-xs);
}

.hero-card-label {
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: var(--spacing-lg);
}

.hero-card-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary), #4aba88);
    border-radius: 4px;
    animation: barGrow 1.5s ease-out;
}

@keyframes barGrow {
    from { width: 0; }
}

/* ===================================
   COMMISSION TIERS
   =================================== */
.commission-section {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-main);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.3px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

.tiers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.tier-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    border: 2px solid var(--border);
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.tier-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.tier-icon {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.tier-icon svg {
    width: 40px;
    height: 40px;
}

.tier-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.tier-percentage {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: var(--spacing-md);
}

.tier-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.tier-example {
    background: var(--gray-50);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.tier-example-label {
    font-size: 12px;
    color: var(--text-muted);
}

.tier-example-value {
    font-size: 1.25rem;
    font-weight: 700;
}

/* Tier Colors */
.tier-gold {
    border-color: #f59e0b;
}
.tier-gold .tier-icon {
    color: #d97706;
}
.tier-gold .tier-badge {
    background: #fef3c7;
    color: #92400e;
}
.tier-gold .tier-percentage {
    color: #d97706;
}
.tier-gold .tier-example-value {
    color: #d97706;
}
.tier-gold:hover {
    border-color: #d97706;
}

.tier-silver {
    border-color: var(--primary);
}
.tier-silver .tier-icon {
    color: var(--primary);
}
.tier-silver .tier-badge {
    background: var(--primary-light);
    color: var(--primary);
}
.tier-silver .tier-percentage {
    color: var(--primary);
}
.tier-silver .tier-example-value {
    color: var(--primary);
}
.tier-silver:hover {
    border-color: var(--primary-hover);
}

.tier-bronze {
    border-color: var(--secondary);
}
.tier-bronze .tier-icon {
    color: #059669;
}
.tier-bronze .tier-badge {
    background: #d1fae5;
    color: #065f46;
}
.tier-bronze .tier-percentage {
    color: #059669;
}
.tier-bronze .tier-example-value {
    color: #059669;
}
.tier-bronze:hover {
    border-color: #059669;
}

/* ===================================
   CALCULATOR
   =================================== */
.calculator-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.calculator-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.calc-input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.calc-input-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.calc-input-group input[type="range"] {
    width: 100%;
    height: 6px;
    appearance: none;
    background: var(--gray-200);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.calc-input-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 22px;
    height: 22px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(26, 95, 122, 0.3);
    transition: var(--transition);
}

.calc-input-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.calc-range-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    text-align: center;
}

.calc-input-group select {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-card);
    cursor: pointer;
    transition: var(--transition);
}

.calc-input-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.calc-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius-sm);
}

.calc-result-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.calc-result-value {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
}

.calc-result-total {
    background: linear-gradient(135deg, var(--primary), var(--info));
    color: white;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.calc-result-total .calc-result-label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
}

.calc-result-total .calc-result-value {
    color: white;
    font-size: 1.25rem;
}

/* ===================================
   HOW IT WORKS
   =================================== */
.how-section {
    padding: var(--spacing-4xl) 0;
    background: white;
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    flex: 1;
    max-width: 280px;
    transition: var(--transition-slow);
}

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

.step-number {
    display: inline-flex;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 16px;
    margin-bottom: var(--spacing-md);
}

.step-icon {
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.step-icon svg {
    width: 32px;
    height: 32px;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

.step-connector {
    color: var(--gray-300);
    flex-shrink: 0;
}

/* ===================================
   SIGNUP FORM SECTION
   =================================== */
.signup-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--bg-main) 0%, #e8f4f8 100%);
}

.signup-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.signup-header {
    background: linear-gradient(135deg, var(--primary), var(--info));
    color: white;
    padding: var(--spacing-xl) var(--spacing-2xl);
    text-align: center;
}

.signup-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.signup-header p {
    opacity: 0.9;
    font-size: 15px;
}

.signup-form {
    padding: var(--spacing-2xl);
}

/* Form Sections */
.form-section {
    margin-bottom: var(--spacing-xl);
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-light);
}

.form-section-title .icon {
    color: var(--primary);
}

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

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

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group select {
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input.error,
.form-group select.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px #fee2e2;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
    min-height: 16px;
}

.form-hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
    line-height: 1.5;
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--primary);
    flex-shrink: 0;
    cursor: pointer;
}

.checkbox-label a {
    color: var(--primary);
    text-decoration: underline;
}

.checkbox-label a:hover {
    color: var(--primary-hover);
}

/* Submit Button */
.btn-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--primary), var(--info));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 95, 122, 0.35);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-submit .icon {
    width: 22px;
    height: 22px;
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===================================
   SUCCESS MODAL
   =================================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: var(--spacing-lg);
}

.modal-overlay.active {
    display: flex;
}

.success-modal {
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-2xl);
    padding: var(--spacing-2xl);
    max-width: 520px;
    width: 100%;
    text-align: center;
}

.modal-icon-success {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--spacing-lg);
    background: #d1fae5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-icon-success svg {
    width: 40px;
    height: 40px;
    stroke: #059669;
}

.success-modal h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.modal-message {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 15px;
}

.modal-referral-code,
.modal-referral-link {
    margin-bottom: var(--spacing-lg);
}

.modal-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.modal-code {
    background: var(--gray-100);
    border: 2px dashed var(--primary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 800;
    font-family: 'Monaco', 'Menlo', monospace;
    letter-spacing: 3px;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.modal-link {
    background: var(--gray-50);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 12px;
    font-family: monospace;
    color: var(--text-secondary);
    word-break: break-all;
    margin-bottom: var(--spacing-sm);
}

.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 6px 14px;
    background: var(--gray-100);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.btn-copy:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.btn-copy .icon {
    width: 16px;
    height: 16px;
}

.modal-actions {
    margin-top: var(--spacing-xl);
}

/* ===================================
   BUTTONS COMMON
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(--border-radius);
}

.btn .icon {
    width: 20px;
    height: 20px;
}

/* ===================================
   TOAST NOTIFICATIONS
   =================================== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 3000;
}

.toast {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    min-width: 300px;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast-success { border-left: 4px solid var(--success); }
.toast-error { border-left: 4px solid var(--danger); }
.toast-info { border-left: 4px solid var(--primary); }

.toast button {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.toast button:hover {
    color: var(--text-primary);
}

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-bottom: var(--spacing-2xl);
    }

    .hero-content {
        max-width: 100%;
    }

    .tiers-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto var(--spacing-3xl);
    }

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

    .steps-grid {
        flex-direction: column;
    }

    .step-connector {
        transform: rotate(90deg);
    }

    .step-card {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-card {
        min-width: auto;
        width: 100%;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }

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

    .signup-form {
        padding: var(--spacing-lg);
    }

    .signup-header {
        padding: var(--spacing-lg);
    }

    .nav-right {
        gap: var(--spacing-sm);
    }

    .nav-link-secondary {
        display: none;
    }

    .success-modal {
        padding: var(--spacing-lg);
    }

    .modal-code {
        font-size: 1.2rem;
        letter-spacing: 2px;
    }

    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }

    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: calc(64px + var(--spacing-2xl));
    }

    .tier-percentage {
        font-size: 2.5rem;
    }

    nav {
        padding: 0 var(--spacing-md);
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}