/* ================================
   PulseTracker Website - Custom Styles
   Modern Design with 2025 Trends
   ================================ */

/* ===== CUSTOM PROPERTIES ===== */
:root {
    --primary: #FFC107;
    --primary-dark: #FF9800;
    --secondary: #1E293B;
    --secondary-light: #334155;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.18);
}

/* ===== BASE STYLES ===== */
* {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

/* ===== GLASSMORPHISM EFFECTS ===== */
.glass-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px 0 rgba(31, 38, 135, 0.2);
}

/* ===== FEATURE CARDS ===== */
.feature-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    transform: scaleX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* ===== GRADIENT TEXT ===== */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== NAVIGATION ===== */
.nav-link {
    position: relative;
    font-weight: 500;
    color: #334155;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.nav-link-mobile {
    font-weight: 500;
    color: #334155;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link-mobile:hover {
    background: rgba(255, 193, 7, 0.1);
    color: var(--primary-dark);
}

/* ===== BUTTONS ===== */
.btn-primary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(255, 193, 7, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 193, 7, 0.4);
}

.btn-primary-large {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 14px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 6px 20px rgba(255, 193, 7, 0.35);
}

.btn-primary-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 193, 7, 0.45);
}

.btn-secondary {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--secondary);
    font-weight: 600;
    border-radius: 12px;
    border: 2px solid #E2E8F0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-secondary-large {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: white;
    color: var(--secondary);
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 14px;
    border: 2px solid #E2E8F0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-secondary-large:hover {
    border-color: var(--primary);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

/* ===== HOVER LIFT EFFECT ===== */
.hover-lift {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

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

@keyframes pulseSlow {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
}

.fade-in-up.delay-1 {
    animation-delay: 0.2s;
}

.fade-in-up.delay-2 {
    animation-delay: 0.4s;
}

.fade-in-up.delay-3 {
    animation-delay: 0.6s;
}

.animate-pulse-slow {
    animation: pulseSlow 4s ease-in-out infinite;
}

/* ===== LOGO SCROLL ===== */
.logo-scroll {
    overflow: hidden;
    position: relative;
    width: 100%;
}

.logo-scroll-track {
    display: flex;
    gap: 3rem;
    animation: scroll 30s linear infinite;
}

.logo-scroll-track:hover {
    animation-play-state: paused;
}

.logo-item {
    flex-shrink: 0;
    width: 140px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.logo-item:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.logo-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* ===== FORM INPUTS ===== */
.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #E2E8F0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.1);
}

/* ===== TESTIMONIAL CARDS ===== */
.testimonial-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.stars {
    display: flex;
    gap: 0.25rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* ===== PRICING TABLE ===== */
.pricing-toggle {
    display: inline-flex;
    background: #F1F5F9;
    border-radius: 12px;
    padding: 0.375rem;
}

.pricing-toggle button {
    padding: 0.625rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    background: transparent;
    color: #64748B;
}

.pricing-toggle button.active {
    background: white;
    color: var(--primary-dark);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #F1F5F9;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-list li:last-child {
    border-bottom: none;
}

/* ===== FAQ ACCORDION ===== */
.faq-item {
    background: white;
    border-radius: 16px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.5rem;
    font-weight: 600;
    font-size: 1.125rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
    border: none;
}

.faq-question:hover {
    color: var(--primary-dark);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #64748B;
    line-height: 1.7;
}

.faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-icon.rotate {
    transform: rotate(180deg);
}

/* ===== BLOG CARDS ===== */
.blog-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.blog-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.blog-category {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(255, 193, 7, 0.1);
    color: var(--primary-dark);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 20px;
}

.filter-button {
    padding: 0.625rem 1.25rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    border: 2px solid #E2E8F0;
    background: white;
    color: #64748B;
}

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

/* ===== SEARCH BAR ===== */
.search-bar {
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid #E2E8F0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #94A3B8;
}

/* ===== UTILITY CLASSES ===== */
.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
}

.section-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: #64748B;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
    .glass-card {
        border-radius: 16px;
    }

    .feature-card {
        border-radius: 16px;
    }

    .logo-scroll-track {
        gap: 2rem;
    }

    .logo-item {
        width: 100px;
        height: 50px;
    }
}

/* ===== SCROLL ANIMATIONS ===== */
.scroll-fade {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-fade.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== LOADING STATES ===== */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* ===== BADGE ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

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

.badge-secondary {
    background: #F1F5F9;
    color: #64748B;
}

/* ===== DIVIDER ===== */
.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, #E2E8F0, transparent);
    margin: 3rem 0;
}

/* ===== TOOLTIP ===== */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 0.5rem 0.75rem;
    background: var(--secondary);
    color: white;
    font-size: 0.875rem;
    border-radius: 8px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
}

[data-tooltip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}