/**
 * PickTwo Modern Design System
 * Professional B2B Website Enhancement
 * Version: 2.0.0
 */

/* ===== ENHANCED COLOR PALETTE ===== */
:root {
    /* Primary Colors */
    --pt-primary: #0052CC;
    --pt-primary-dark: #003A8C;
    --pt-primary-light: #0066FF;

    /* Secondary Colors */
    --pt-secondary: #00B8D9;
    --pt-secondary-dark: #008DA5;
    --pt-secondary-light: #00D4FF;

    /* Accent Colors */
    --pt-accent-cyan: #00B8D9;
    --pt-accent-purple: #6554C0;
    --pt-accent-green: #36B37E;
    --pt-accent-orange: #FFAB00;

    /* Neutral Colors */
    --pt-gray-900: #091E42;
    --pt-gray-800: #172B4D;
    --pt-gray-700: #253858;
    --pt-gray-600: #42526E;
    --pt-gray-500: #5E6C84;
    --pt-gray-400: #6B778C;
    --pt-gray-300: #97A0AF;
    --pt-gray-200: #C1C7D0;
    --pt-gray-100: #F4F5F7;
    --pt-gray-50: #FAFBFC;

    /* Semantic Colors */
    --pt-success: #36B37E;
    --pt-warning: #FFAB00;
    --pt-error: #DE350B;
    --pt-info: #0065FF;

    /* Typography */
    --pt-font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --pt-font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing Scale */
    --pt-space-xs: 4px;
    --pt-space-sm: 8px;
    --pt-space-md: 16px;
    --pt-space-lg: 24px;
    --pt-space-xl: 32px;
    --pt-space-2xl: 48px;
    --pt-space-3xl: 64px;
    --pt-space-4xl: 80px;
    --pt-space-5xl: 96px;
    --pt-space-6xl: 128px;

    /* Border Radius */
    --pt-radius-sm: 4px;
    --pt-radius-md: 8px;
    --pt-radius-lg: 12px;
    --pt-radius-xl: 16px;
    --pt-radius-2xl: 24px;
    --pt-radius-full: 9999px;

    /* Shadows */
    --pt-shadow-sm: 0 1px 3px rgba(9, 30, 66, 0.13);
    --pt-shadow-md: 0 4px 8px rgba(9, 30, 66, 0.13);
    --pt-shadow-lg: 0 8px 16px rgba(9, 30, 66, 0.13);
    --pt-shadow-xl: 0 16px 32px rgba(9, 30, 66, 0.13);
    --pt-shadow-2xl: 0 24px 48px rgba(9, 30, 66, 0.13);

    /* Z-Index */
    --pt-z-dropdown: 1000;
    --pt-z-sticky: 1020;
    --pt-z-fixed: 1030;
    --pt-z-modal-backdrop: 1040;
    --pt-z-modal: 1050;
    --pt-z-popover: 1060;
    --pt-z-tooltip: 1070;
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--pt-font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--pt-gray-800);
    background-color: var(--pt-gray-50);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--pt-font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--pt-gray-900);
    margin-bottom: var(--pt-space-md);
}

h1 {
    font-size: clamp(36px, 5vw, 56px);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(28px, 4vw, 42px);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(24px, 3vw, 32px);
}

h4 {
    font-size: clamp(20px, 2.5vw, 24px);
}

h5 {
    font-size: 18px;
}

h6 {
    font-size: 16px;
}

p {
    margin-bottom: var(--pt-space-md);
    color: var(--pt-gray-600);
}

.lead {
    font-size: 20px;
    line-height: 1.7;
    color: var(--pt-gray-700);
    font-weight: 400;
}

/* ===== SECTION SPACING ===== */
.pt-section {
    padding: var(--pt-space-5xl) 0;
}

.pt-section--sm {
    padding: var(--pt-space-3xl) 0;
}

.pt-section--lg {
    padding: var(--pt-space-6xl) 0;
}

/* ===== HERO SECTIONS ===== */
.pt-hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--pt-gray-50) 0%, var(--pt-gray-100) 100%);
    overflow: hidden;
}

.pt-hero--gradient {
    background: linear-gradient(135deg, var(--pt-primary) 0%, var(--pt-primary-dark) 100%);
    color: white;
}

.pt-hero--gradient h1,
.pt-hero--gradient h2,
.pt-hero--gradient p {
    color: white;
}

.pt-hero__image {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 50%;
    background-size: cover;
    background-position: center;
    opacity: 0.1;
}

.pt-hero__content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--pt-space-lg);
}

/* ===== BUTTONS ===== */
.pt-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--pt-font-heading);
    font-size: 16px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border-radius: var(--pt-radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

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

.pt-btn--primary:hover {
    background: var(--pt-primary-dark);
    border-color: var(--pt-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--pt-shadow-lg);
}

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

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

.pt-btn--lg {
    padding: 18px 36px;
    font-size: 18px;
}

.pt-btn--sm {
    padding: 10px 20px;
    font-size: 14px;
}

/* ===== CARDS ===== */
.pt-card {
    background: white;
    border-radius: var(--pt-radius-lg);
    padding: var(--pt-space-xl);
    box-shadow: var(--pt-shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

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

.pt-card--featured {
    border: 2px solid var(--pt-primary);
    background: linear-gradient(135deg, white 0%, var(--pt-gray-50) 100%);
}

.pt-card__image {
    width: 100%;
    height: 200px;
    margin: calc(var(--pt-space-xl) * -1) calc(var(--pt-space-xl) * -1) var(--pt-space-xl);
    object-fit: cover;
    border-radius: var(--pt-radius-lg) var(--pt-radius-lg) 0 0;
}

.pt-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pt-primary);
    color: white;
    border-radius: var(--pt-radius-lg);
    font-size: 28px;
    margin-bottom: var(--pt-space-lg);
}

.pt-card__title {
    font-size: 24px;
    margin-bottom: var(--pt-space-md);
    color: var(--pt-gray-900);
}

.pt-card__description {
    color: var(--pt-gray-600);
    margin-bottom: var(--pt-space-lg);
}

/* ===== GRID LAYOUTS ===== */
.pt-grid {
    display: grid;
    gap: var(--pt-space-xl);
}

.pt-grid--2 {
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.pt-grid--3 {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.pt-grid--4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease-out;
}

.animate-slideUp {
    animation: slideUp 0.6s ease-out;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ===== LOADING STATES ===== */
.pt-skeleton {
    background: linear-gradient(90deg, var(--pt-gray-100) 0%, var(--pt-gray-200) 50%, var(--pt-gray-100) 100%);
    background-size: 200% 100%;
    animation: skeleton 1.5s infinite;
    border-radius: var(--pt-radius-md);
}

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

.pt-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--pt-gray-200);
    border-top-color: var(--pt-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===== BADGES ===== */
.pt-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--pt-radius-full);
    background: var(--pt-gray-100);
    color: var(--pt-gray-700);
}

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

.pt-badge--success {
    background: var(--pt-success);
    color: white;
}

.pt-badge--warning {
    background: var(--pt-warning);
    color: var(--pt-gray-900);
}

/* ===== FORMS ===== */
.pt-form-group {
    margin-bottom: var(--pt-space-lg);
}

.pt-form-label {
    display: block;
    margin-bottom: var(--pt-space-sm);
    font-weight: 600;
    color: var(--pt-gray-700);
}

.pt-form-input,
.pt-form-select,
.pt-form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    font-family: var(--pt-font-body);
    border: 2px solid var(--pt-gray-200);
    border-radius: var(--pt-radius-md);
    background: white;
    transition: all 0.3s ease;
}

.pt-form-input:focus,
.pt-form-select:focus,
.pt-form-textarea:focus {
    outline: none;
    border-color: var(--pt-primary);
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.pt-form-input::placeholder,
.pt-form-textarea::placeholder {
    color: var(--pt-gray-400);
}

/* ===== NAVIGATION ===== */
.pt-nav {
    background: white;
    box-shadow: var(--pt-shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--pt-z-sticky);
}

.pt-nav__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--pt-space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.pt-nav__menu {
    display: flex;
    align-items: center;
    gap: var(--pt-space-xl);
    list-style: none;
}

.pt-nav__link {
    color: var(--pt-gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.pt-nav__link:hover {
    color: var(--pt-primary);
}

.pt-nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--pt-primary);
    transition: width 0.3s ease;
}

.pt-nav__link:hover::after {
    width: 100%;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .pt-grid--3 {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }

    .pt-grid--4 {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --pt-space-5xl: 64px;
        --pt-space-6xl: 80px;
    }

    .pt-grid--2,
    .pt-grid--3,
    .pt-grid--4 {
        grid-template-columns: 1fr;
    }

    .pt-hero__image {
        width: 100%;
        opacity: 0.05;
    }

    .pt-nav__menu {
        display: none;
    }
}

@media (max-width: 480px) {
    .pt-card {
        padding: var(--pt-space-lg);
    }

    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 28px;
    }

    .pt-btn {
        width: 100%;
    }
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: var(--pt-space-sm) !important; }
.mt-2 { margin-top: var(--pt-space-md) !important; }
.mt-3 { margin-top: var(--pt-space-lg) !important; }
.mt-4 { margin-top: var(--pt-space-xl) !important; }
.mt-5 { margin-top: var(--pt-space-2xl) !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--pt-space-sm) !important; }
.mb-2 { margin-bottom: var(--pt-space-md) !important; }
.mb-3 { margin-bottom: var(--pt-space-lg) !important; }
.mb-4 { margin-bottom: var(--pt-space-xl) !important; }
.mb-5 { margin-bottom: var(--pt-space-2xl) !important; }

.pt-0 { padding-top: 0 !important; }
.pt-1 { padding-top: var(--pt-space-sm) !important; }
.pt-2 { padding-top: var(--pt-space-md) !important; }
.pt-3 { padding-top: var(--pt-space-lg) !important; }
.pt-4 { padding-top: var(--pt-space-xl) !important; }
.pt-5 { padding-top: var(--pt-space-2xl) !important; }

.pb-0 { padding-bottom: 0 !important; }
.pb-1 { padding-bottom: var(--pt-space-sm) !important; }
.pb-2 { padding-bottom: var(--pt-space-md) !important; }
.pb-3 { padding-bottom: var(--pt-space-lg) !important; }
.pb-4 { padding-bottom: var(--pt-space-xl) !important; }
.pb-5 { padding-bottom: var(--pt-space-2xl) !important; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.align-center { align-items: center !important; }

.gap-1 { gap: var(--pt-space-sm) !important; }
.gap-2 { gap: var(--pt-space-md) !important; }
.gap-3 { gap: var(--pt-space-lg) !important; }
.gap-4 { gap: var(--pt-space-xl) !important; }