/* Happy AI Path - Global Styles
   Professional redesign with Deep Teal color scheme
   ================================================ */

/* ===========================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   =========================================== */
:root {
    /* Primary Brand Colors - Deep Teal */
    --color-primary: #0E7490;
    --color-primary-dark: #0C6880;
    --color-primary-light: #14B8A6;

    /* Secondary Colors */
    --color-accent: #0D9488;
    --color-accent-dark: #0B7A70;

    /* Neutral Colors */
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    /* Shadows */
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 10px 20px rgba(0, 0, 0, 0.12);
    --shadow-testimonial: 0 4px 6px -1px rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-family: 'Inter', sans-serif;
    --line-height-heading: 1.2;
    --line-height-body: 1.6;
}

/* ===========================================
   2. BASE TYPOGRAPHY
   =========================================== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: #fff;
    color: var(--color-gray-800);
    line-height: var(--line-height-body);
}

/* Heading Hierarchy */
h1, h2, .heading-primary, .heading-secondary {
    font-weight: 700;
    line-height: var(--line-height-heading);
}

h1, .heading-primary {
    letter-spacing: -0.02em;
}

h2, .heading-secondary {
    letter-spacing: -0.01em;
}

/* ===========================================
   3. PRIMARY BUTTONS (Deep Teal)
   =========================================== */
.btn-primary {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-size: 1.125rem;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-card);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

/* Large Primary Button (Hero CTA) */
.btn-primary-lg {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
    padding: 1rem 2.5rem;
    border-radius: 0.5rem;
    font-size: 1.25rem;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 6px 12px rgba(14, 116, 144, 0.3);
}

.btn-primary-lg:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(14, 116, 144, 0.35);
}

/* ===========================================
   4. SECONDARY BUTTONS (Outline Style)
   =========================================== */
.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-size: 1.125rem;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

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

/* Hero Secondary Button (White outline for dark bg) */
.btn-secondary-hero {
    background-color: transparent;
    border: 2px solid white;
    color: white;
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-size: 1.125rem;
    display: inline-block;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary-hero:hover {
    background-color: white;
    color: var(--color-gray-900);
    transform: translateY(-2px);
}

/* ===========================================
   5. TERTIARY BUTTONS (Text Link Style)
   =========================================== */
.btn-tertiary {
    color: white;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 4px;
    padding: 0.5rem 0;
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-tertiary:hover {
    color: var(--color-primary-light);
    text-underline-offset: 6px;
}

/* ===========================================
   6. CARD STYLES WITH SHADOWS
   =========================================== */
.card {
    background-color: white;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}

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

/* Service Cards */
.service-card {
    background-color: white;
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-primary);
}

.service-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: var(--line-height-heading);
}

.service-card .btn-book {
    background-color: var(--color-primary);
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-align: center;
    text-decoration: none;
    margin-top: auto;
    display: inline-block;
    transition: all 0.3s ease;
}

.service-card .btn-book:hover {
    background-color: var(--color-primary-dark);
}

/* ===========================================
   7. TESTIMONIAL SECTION
   =========================================== */
.testimonials-section {
    background-color: var(--color-gray-50);
}

.testimonial-card {
    background-color: white;
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-testimonial);
}

/* ===========================================
   8. PROMPTING LAB - FILTER PILLS
   =========================================== */
.filter-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.filter-pill {
    padding: 0.5rem 1.25rem;
    border-radius: 9999px;
    border: 1px solid var(--color-gray-200);
    background-color: white;
    color: var(--color-gray-700);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-pill:hover {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-300);
}

.filter-pill.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ===========================================
   9. PROMPTING LAB - PROMPT CARDS
   =========================================== */
.prompt-card-styled {
    background-color: var(--color-gray-100);
    border-radius: 0.75rem;
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 0.3s ease;
}

.prompt-card-styled:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-left-color: var(--color-primary-dark);
}

/* ===========================================
   10. NAVIGATION - PROMPTING LAB HIGHLIGHT
   =========================================== */
.nav-prompting-lab {
    color: var(--color-primary) !important;
    font-weight: 700 !important;
}

.nav-prompting-lab:hover {
    color: var(--color-primary-dark) !important;
}

/* Mobile Nav - Prompting Lab Highlight */
.mobile-nav-prompting-lab {
    color: var(--color-primary) !important;
    font-weight: 600 !important;
    background-color: rgba(14, 116, 144, 0.1) !important;
}

/* ===========================================
   11. SECTION BACKGROUNDS
   =========================================== */
.section-gray {
    background-color: var(--color-gray-50);
}

.section-white {
    background-color: white;
}

/* ===========================================
   12. BACK TO TOP BUTTON
   =========================================== */
#backToTopBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: var(--color-primary);
    color: white;
    cursor: pointer;
    padding: 12px;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

#backToTopBtn:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* ===========================================
   13. ANIMATIONS
   =========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================================
   14. CARD HOVER EFFECTS
   =========================================== */
.card-hover {
    transition: all 0.3s ease;
}

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

/* CTA Button Hover */
.cta-button {
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* ===========================================
   15. SKIP LINK
   =========================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background-color: var(--color-primary);
    color: white;
    padding: 0.5rem;
    z-index: 50;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
}

/* ===========================================
   16. HERO SECTION STYLES
   =========================================== */
.hero-bg {
    background-color: var(--color-gray-900);
    position: relative;
    overflow: hidden;
}

.hero-h1 {
    animation: fadeInUp 1s ease-out forwards;
}

.hero-p {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .hero-p {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 1s ease-out 0.5s forwards;
    }
}

/* ===========================================
   17. AI BUBBLES
   =========================================== */
.ai-bubbles {
    gap: 0.75rem;
}

.ai-bubble {
    background: linear-gradient(135deg, #eef2ff, #e0f2fe);
    color: var(--color-gray-900);
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
    box-shadow: 0 12px 24px rgba(14, 116, 144, 0.18), inset 0 2px 0 rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(14, 116, 144, 0.25);
    letter-spacing: 0.02em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    animation: float 16s ease-in-out infinite;
    will-change: transform;
}

.ai-bubble::before {
    content: "";
    position: absolute;
    top: 20%;
    left: 18%;
    right: 18%;
    height: 45%;
    border-radius: 9999px;
    background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0));
    opacity: 0.95;
    pointer-events: none;
}

.ai-bubble:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 30px rgba(14, 116, 144, 0.24), inset 0 2px 0 rgba(255, 255, 255, 0.9);
}

.ai-bubble:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 3px;
}

.ai-bubble-active {
    border-color: rgba(16, 185, 129, 0.5);
    box-shadow: 0 16px 30px rgba(16, 185, 129, 0.24), inset 0 2px 0 rgba(255, 255, 255, 0.95);
    background: linear-gradient(135deg, #ecfeff, #d1fae5);
}

.ai-bubble:nth-child(2) {
    animation-duration: 18s;
    animation-delay: 2s;
}

.ai-bubble:nth-child(3) {
    animation-duration: 20s;
    animation-delay: 4s;
}

@keyframes float {
    0% { transform: translate3d(0, 0, 0); }
    25% { transform: translate3d(12px, -10px, 0); }
    50% { transform: translate3d(-8px, 14px, 0); }
    75% { transform: translate3d(-16px, -8px, 0); }
    100% { transform: translate3d(0, 0, 0); }
}

/* ===========================================
   18. ANIMATED PATH
   =========================================== */
.animated-path {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.5;
}

.path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: draw-path 10s ease-out forwards;
}

@keyframes draw-path {
    to {
        stroke-dashoffset: 0;
    }
}

/* ===========================================
   19. COOKIE BANNER
   =========================================== */
#cookie-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-gray-800);
    color: white;
    padding: 1rem;
    z-index: 100;
}

#cookie-banner.show {
    display: block;
}

/* ===========================================
   20. REDUCED MOTION
   =========================================== */
@media (prefers-reduced-motion: reduce) {
    html, .animated-path, #splash-screen, .animate-on-scroll, .ai-bubble {
        scroll-behavior: auto;
        animation: none !important;
        transition: none !important;
    }
}

/* ===========================================
   21. GRADIENT TEXT
   =========================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===========================================
   22. TOAST NOTIFICATION
   =========================================== */
#toast {
    visibility: hidden;
    min-width: 250px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 8px;
    padding: 16px;
    position: fixed;
    z-index: 100;
    left: 50%;
    bottom: 30px;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s, bottom 0.3s;
}

#toast.show {
    visibility: visible;
    opacity: 1;
    bottom: 50px;
}

/* ===========================================
   23. NAV LINK STYLES
   =========================================== */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-primary);
    transition: width 0.3s ease-in-out;
}

.nav-link:hover::after {
    width: 100%;
}

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

.nav-link.active::after {
    width: 100%;
}