/* ========================================
   MODERN PIPE DESIGN SYSTEM
   Component-based design for premium hookah experience
   Based on PIPE brandbook with enhanced UX/UI
======================================== */

/* ========================================
   DESIGN TOKENS & CUSTOM PROPERTIES
======================================== */

:root {
    /* Enhanced Color Palette */
    --color-primary-black: #000000;
    --color-primary-dark: #0a0a0a;
    --color-secondary-dark: #141414;
    --color-tertiary-dark: #1e1e1e;
    --color-charcoal: #2a2a2a;
    
    /* Orange Gradient System */
    --color-orange-primary: #FF9900;
    --color-orange-light: #ffb340;
    --color-orange-dark: #e68a00;
    --color-orange-deeper: #cc7a00;
    
    /* Sophisticated Gray Scale */
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Text Color System */
    --color-text-primary: #000000;
    --color-text-secondary: #525252;
    --color-text-tertiary: #737373;
    --color-text-inverse-primary: #ffffff;
    --color-text-inverse-secondary: #d4d4d4;
    --color-text-accent: var(--color-orange-primary);
    
    /* Modern Gradient System */
    --gradient-orange-primary: linear-gradient(135deg, #FF9900 0%, #e68a00 100%);
    --gradient-orange-glow: linear-gradient(135deg, #FF9900 0%, #ffb340 50%, #e68a00 100%);
    --gradient-dark-smoke: linear-gradient(135deg, #000000 0%, #1e1e1e 50%, #000000 100%);
    --gradient-glass-light: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --gradient-glass-dark: linear-gradient(135deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.05) 100%);
    
    /* Atmospheric Smoke Effects */
    --smoke-light: rgba(255, 255, 255, 0.03);
    --smoke-medium: rgba(255, 255, 255, 0.08);
    --smoke-dense: rgba(255, 255, 255, 0.15);
    --smoke-orange: rgba(255, 153, 0, 0.1);
    --smoke-orange-glow: rgba(255, 153, 0, 0.2);
    
    /* Enhanced Typography Scale */
    --font-family-heading: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-family-body: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 800;
    
    /* Fluid Typography */
    --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
    --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
    --font-size-3xl: clamp(2rem, 1.7rem + 1.5vw, 2.5rem);
    --font-size-4xl: clamp(2.5rem, 2rem + 2.5vw, 3.5rem);
    --font-size-5xl: clamp(3.5rem, 3rem + 2.5vw, 5rem);
    
    /* Spacing System (8px base) */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */
    
    /* Border Radius System */
    --radius-xs: 0.125rem;  /* 2px */
    --radius-sm: 0.25rem;   /* 4px */
    --radius-md: 0.375rem;  /* 6px */
    --radius-lg: 0.5rem;    /* 8px */
    --radius-xl: 0.75rem;   /* 12px */
    --radius-2xl: 1rem;     /* 16px */
    --radius-3xl: 1.5rem;   /* 24px */
    --radius-full: 9999px;
    
    /* Shadow System */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 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);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    
    /* Glow Effects */
    --glow-orange-soft: 0 0 20px rgba(255, 153, 0, 0.2);
    --glow-orange-medium: 0 0 30px rgba(255, 153, 0, 0.4);
    --glow-orange-strong: 0 0 40px rgba(255, 153, 0, 0.6);
    --glow-white-soft: 0 0 15px rgba(255, 255, 255, 0.1);
    --glow-white-medium: 0 0 25px rgba(255, 255, 255, 0.2);
    
    /* Animation & Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Layout */
    --container-max-width: 1280px;
    --container-padding: var(--space-6);
    --header-height: 80px;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

/* ========================================
   MODERN COMPONENT SYSTEM
======================================== */

/* Button Components */
.btn {
    /* Reset & Base */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    
    /* Layout */
    padding: var(--space-3) var(--space-6);
    min-height: 44px;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    
    /* Typography */
    font-family: var(--font-family-body);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    
    /* Interaction */
    cursor: pointer;
    user-select: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    
    /* Performance */
    backface-visibility: hidden;
    transform: translateZ(0);
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover::before {
    transform: translateX(100%);
}

/* Button Variants */
.btn--primary {
    background: var(--gradient-orange-primary);
    color: var(--color-text-inverse-primary);
    box-shadow: var(--glow-orange-soft);
    border-color: var(--color-orange-primary);
}

.btn--primary:hover {
    background: var(--gradient-orange-glow);
    box-shadow: var(--glow-orange-medium), var(--shadow-lg);
    transform: translateY(-2px);
}

.btn--primary:active {
    transform: translateY(0);
    transition: all var(--transition-fast);
}

.btn--secondary {
    background: var(--color-gray-50);
    color: var(--color-text-primary);
    border-color: var(--color-gray-300);
    backdrop-filter: blur(10px);
}

.btn--secondary:hover {
    background: var(--color-gray-50);
    border-color: var(--color-orange-primary);
    color: var(--color-orange-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: none;
    padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover {
    color: var(--color-orange-primary);
    background: var(--smoke-orange);
}

.btn--dark {
    background: var(--gradient-dark-smoke);
    color: var(--color-text-inverse-primary);
    border-color: var(--color-gray-800);
}

.btn--dark:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--glow-white-soft), var(--shadow-lg);
    transform: translateY(-2px);
}

/* Button Sizes */
.btn--sm {
    padding: var(--space-2) var(--space-4);
    min-height: 32px;
    font-size: var(--font-size-xs);
}

.btn--lg {
    padding: var(--space-4) var(--space-8);
    min-height: 56px;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.btn--xl {
    padding: var(--space-5) var(--space-10);
    min-height: 64px;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-xl);
}

/* Button States */
.btn:disabled,
.btn--disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-orange-primary);
    outline-offset: 2px;
}

.btn--loading {
    color: transparent;
    pointer-events: none;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: btn-loading-spin 1s linear infinite;
}

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

/* ========================================
   CARD COMPONENTS
======================================== */

.card {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.card--dark {
    background: var(--color-secondary-dark);
    border-color: var(--color-gray-800);
    color: var(--color-text-inverse-primary);
}

.card--glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card--service {
    background: var(--gradient-dark-smoke);
    color: var(--color-text-inverse-primary);
    border: none;
    text-align: center;
    padding: var(--space-8);
}

.card--service::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-glass-light);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card--service:hover::before {
    opacity: 1;
}

.card--service:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--glow-orange-medium), var(--shadow-xl);
}

.card__header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.card__body {
    padding: var(--space-6);
}

.card__footer {
    padding: var(--space-6);
    border-top: 1px solid var(--color-gray-200);
    background: var(--color-gray-50);
}

/* ========================================
   FORM COMPONENTS
======================================== */

.form-group {
    position: relative;
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
    transition: color var(--transition-base);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family-body);
    background: var(--color-gray-50);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.form-input::placeholder {
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-orange-primary);
    background: white;
    box-shadow: var(--glow-orange-soft);
    transform: translateY(-1px);
}

.form-input:focus::placeholder {
    color: var(--color-gray-300);
}

.form-input:focus + .form-label {
    color: var(--color-orange-primary);
}

/* Glass Form Variant */
.form-input--glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--color-text-inverse-primary);
}

.form-input--glass::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.form-input--glass:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--color-orange-primary);
}

/* Form States */
.form-input:invalid:not(:placeholder-shown) {
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.form-input:valid:not(:placeholder-shown) {
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input.error {
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

/* ========================================
   LAYOUT COMPONENTS
======================================== */

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

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid--cols-1 { grid-template-columns: 1fr; }
.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid--cols-auto { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }

.grid--gap-sm { gap: var(--space-4); }
.grid--gap-lg { gap: var(--space-8); }
.grid--gap-xl { gap: var(--space-12); }

/* Flex System */
.flex {
    display: flex;
}

.flex--center {
    align-items: center;
    justify-content: center;
}

.flex--between {
    justify-content: space-between;
}

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

.flex--wrap {
    flex-wrap: wrap;
}

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ========================================
   MICRO-INTERACTIONS & ANIMATIONS
======================================== */

/* Floating Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.float {
    animation: float 3s ease-in-out infinite;
}

/* Smoke Flow Animation */
@keyframes smokeFlow {
    0%, 100% {
        transform: translateX(0) translateY(0) rotate(0deg);
        opacity: 0.1;
    }
    25% {
        transform: translateX(10px) translateY(-5px) rotate(1deg);
        opacity: 0.2;
    }
    50% {
        transform: translateX(-5px) translateY(-10px) rotate(-0.5deg);
        opacity: 0.15;
    }
    75% {
        transform: translateX(15px) translateY(-3px) rotate(0.8deg);
        opacity: 0.25;
    }
}

.smoke-flow {
    animation: smokeFlow 8s ease-in-out infinite;
}

/* Glow Pulse */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: var(--glow-orange-soft);
    }
    50% {
        box-shadow: var(--glow-orange-medium);
    }
}

.glow-pulse {
    animation: glowPulse 2s ease-in-out infinite;
}

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

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

/* Scale In */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.scale-in {
    animation: scaleIn 0.4s ease-out;
}

/* ========================================
   ACCESSIBILITY ENHANCEMENTS
======================================== */

/* Focus Management */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .btn--primary {
        border: 2px solid;
    }
    
    .card {
        border-width: 2px;
    }
    
    .form-input {
        border-width: 3px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .float,
    .smoke-flow,
    .glow-pulse {
        animation: none;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text-primary: #ffffff;
        --color-text-secondary: #d4d4d4;
        --color-text-tertiary: #a3a3a3;
    }
    
    .card {
        background: var(--color-secondary-dark);
        border-color: var(--color-gray-700);
        color: var(--color-text-inverse-primary);
    }
    
    .form-input {
        background: var(--color-tertiary-dark);
        border-color: var(--color-gray-600);
        color: var(--color-text-inverse-primary);
    }
}

/* ========================================
   RESPONSIVE DESIGN SYSTEM
======================================== */

/* Mobile First Breakpoints */
@media (min-width: 640px) {
    .sm\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
    .sm\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
    .sm\:flex--row { flex-direction: row; }
    .sm\:text-left { text-align: left; }
}

@media (min-width: 768px) {
    .md\:grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
    .md\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
    .md\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
    .md\:flex--row { flex-direction: row; }
}

@media (min-width: 1024px) {
    .lg\:grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
    .lg\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
    .lg\:grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
}

@media (min-width: 1280px) {
    .xl\:grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
    .xl\:grid--cols-5 { grid-template-columns: repeat(5, 1fr); }
    .xl\:grid--cols-6 { grid-template-columns: repeat(6, 1fr); }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 48px;
    }
    
    .form-input {
        min-height: 48px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* ========================================
   UTILITY CLASSES
======================================== */

/* Spacing Utilities */
.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-0 { margin: 0; }
.m-2 { margin: var(--space-2); }
.m-4 { margin: var(--space-4); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-orange { color: var(--color-orange-primary); }
.text-white { color: var(--color-text-inverse-primary); }
.text-gray { color: var(--color-text-secondary); }

.font-light { font-weight: var(--font-weight-light); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

/* Display Utilities */
.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-scroll { overflow: scroll; }
.overflow-auto { overflow: auto; }

/* Border Radius Utilities */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Background Utilities */
.bg-white { background-color: white; }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }
.bg-black { background-color: var(--color-primary-black); }
.bg-orange { background-color: var(--color-orange-primary); }

/* Transform Utilities */
.transform { transform: translateZ(0); }
.hover\:scale-105:hover { transform: scale(1.05); }
.hover\:scale-110:hover { transform: scale(1.1); }
.hover\:-translate-y-1:hover { transform: translateY(-0.25rem); }
.hover\:-translate-y-2:hover { transform: translateY(-0.5rem); }

/* Transition Utilities */
.transition { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* ========================================
   PERFORMANCE OPTIMIZATIONS
======================================== */

/* Will-change for animated elements */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* GPU acceleration */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Content optimization */
.contain-layout {
    contain: layout;
}

.contain-paint {
    contain: paint;
}

.contain-strict {
    contain: strict;
}