/* ===================================
   Task Flow Website Styles
   Version: 1.0
   =================================== */

/* ===================================
   CSS Variables - Color Theme
   =================================== */
:root {
    /* Primary Colors */
    --primary-blue: #2E90FA;
    --dark-bg: #1A2332;
    --card-bg: #243447;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    
    /* Accent Colors */
    --success-green: #10B981;
    --warning-orange: #F59E0B;
    --warning-yellow: #FBBF24;
    --error-red: #EF4444;
    --pink-accent: #FF6B9D;
    
    /* Spacing */
    --spacing-4: 4px;
    --spacing-8: 8px;
    --spacing-12: 12px;
    --spacing-16: 16px;
    --spacing-20: 20px;
    --spacing-24: 24px;
    --spacing-32: 32px;
    --spacing-48: 48px;
    --spacing-64: 64px;
    
    /* Border Radius */
    --radius-8: 8px;
    --radius-12: 12px;
    --radius-16: 16px;
    --radius-24: 24px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    
    /* Header Height */
    --header-height: 70px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===================================
   Base Styles & Reset
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    color: var(--text-secondary);
    font-size: clamp(1rem, 1.5vw, 1.125rem);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   Accessibility - Skip Link
   =================================== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-blue);
    color: var(--text-primary);
    padding: var(--spacing-8) var(--spacing-16);
    z-index: 100;
    border-radius: var(--radius-8);
}

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-20);
}

.section {
    padding: var(--spacing-64) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-48);
}

.section-title {
    margin-bottom: var(--spacing-16);
    color: var(--text-primary);
}

.section-description {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Header & Navigation
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(26, 35, 50, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-12);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-logo i {
    color: var(--primary-blue);
    font-size: 1.75rem;
}

.nav-list {
    display: flex;
    gap: var(--spacing-32);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding: var(--spacing-8) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-blue);
    transition: width var(--transition-normal);
}

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

.nav-toggle,
.nav-close {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ===================================
   Buttons
   =================================== */
.button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-8);
    padding: var(--spacing-12) var(--spacing-24);
    border-radius: var(--radius-8);
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    text-align: center;
    justify-content: center;
}

.button-primary {
    background-color: var(--primary-blue);
    color: var(--text-primary);
}

.button-primary:hover {
    background-color: #1E7AE8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 144, 250, 0.3);
}

.button-large {
    padding: var(--spacing-16) var(--spacing-32);
    font-size: 1.125rem;
}

.button-download {
    background-color: transparent;
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
}

.button-download:hover {
    background-color: var(--primary-blue);
    color: var(--text-primary);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: linear-gradient(135deg, var(--dark-bg) 0%, #0F1729 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(46, 144, 250, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-48);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-16);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-24);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-32);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-16);
    flex-wrap: wrap;
}

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

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, var(--card-bg) 0%, #1A2840 100%);
    border-radius: var(--radius-24);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 8px solid var(--dark-bg);
    position: relative;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 6px;
    background-color: var(--dark-bg);
    border-radius: 3px;
}

.phone-mockup i {
    font-size: 8rem;
    color: var(--primary-blue);
    opacity: 0.3;
}

/* ===================================
   Features Preview Section
   =================================== */
.features-preview {
    background-color: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-32);
    margin-top: var(--spacing-48);
}

.feature-card {
    background-color: var(--card-bg);
    padding: var(--spacing-32);
    border-radius: var(--radius-16);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-blue);
    box-shadow: 0 12px 24px rgba(46, 144, 250, 0.2);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1E7AE8 100%);
    border-radius: var(--radius-16);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-24);
}

.feature-icon i {
    font-size: 2.5rem;
    color: var(--text-primary);
}

.feature-title {
    margin-bottom: var(--spacing-16);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===================================
   Detailed Features Section
   =================================== */
.features-detailed {
    background: linear-gradient(180deg, var(--dark-bg) 0%, #0F1729 100%);
}

.feature-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-48);
    align-items: center;
    margin-bottom: var(--spacing-64);
}

.feature-detail.reverse {
    direction: rtl;
}

.feature-detail.reverse > * {
    direction: ltr;
}

.feature-detail-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1E7AE8 100%);
    border-radius: var(--radius-12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-20);
}

.feature-detail-icon i {
    font-size: 2rem;
    color: var(--text-primary);
}

.feature-detail-title {
    margin-bottom: var(--spacing-16);
}

.feature-detail-description {
    margin-bottom: var(--spacing-24);
    line-height: 1.8;
}

.feature-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-12);
}

.feature-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-12);
    color: var(--text-secondary);
}

.feature-benefits li i {
    color: var(--success-green);
    font-size: 1.25rem;
}

.feature-detail-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Mobile Mockup Frame for Screenshots */
.mobile-mockup {
    position: relative;
    width: 320px;
    max-width: 100%;
    padding: 16px 12px;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border-radius: 32px;
    box-shadow: 
        0 0 0 2px #334155,
        0 0 0 4px #1e293b,
        0 20px 50px rgba(0, 0, 0, 0.5),
        inset 0 0 20px rgba(0, 0, 0, 0.3);
}

/* Top notch/camera cutout */
.mobile-mockup::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 24px;
    background: #0f172a;
    border-radius: 0 0 16px 16px;
    z-index: 2;
}

/* Camera dot */
.mobile-mockup::after {
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 10px;
    background: #1e293b;
    border-radius: 50%;
    z-index: 3;
    box-shadow: 0 0 0 1px rgba(100, 116, 139, 0.3);
}

/* Screenshot container inside mockup */
.mobile-mockup-screen {
    position: relative;
    width: 100%;
    background: #000;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
}

.mobile-mockup-screen img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 0;
}

.screenshot-placeholder {
    width: 100%;
    max-width: 400px;
    height: 500px;
    background-color: var(--card-bg);
    border-radius: var(--radius-16);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-16);
    border: 2px dashed rgba(46, 144, 250, 0.3);
}

.screenshot-placeholder i {
    font-size: 4rem;
    color: var(--primary-blue);
    opacity: 0.5;
}

.screenshot-placeholder p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   Download Section
   =================================== */
.download {
    background-color: var(--dark-bg);
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-48);
}

.download-category-title {
    text-align: center;
    margin-bottom: var(--spacing-32);
    color: var(--primary-blue);
}

.platform-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-32);
}

.platform-card {
    background-color: var(--card-bg);
    padding: var(--spacing-32);
    border-radius: var(--radius-16);
    text-align: center;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.platform-card.available:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(46, 144, 250, 0.2);
}

.platform-card.coming-soon {
    opacity: 0.7;
}

.platform-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1E7AE8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-20);
}

.platform-card.coming-soon .platform-icon {
    background: linear-gradient(135deg, var(--text-secondary) 0%, #64748B 100%);
}

.platform-icon i {
    font-size: 3rem;
    color: var(--text-primary);
}

.platform-name {
    margin-bottom: var(--spacing-12);
    color: var(--text-primary);
}

.platform-requirements {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-24);
    font-size: 0.875rem;
}

.badge {
    display: inline-block;
    padding: var(--spacing-8) var(--spacing-16);
    border-radius: var(--radius-8);
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-coming-soon {
    background-color: rgba(251, 191, 36, 0.2);
    color: var(--warning-yellow);
}

/* ===================================
   About Section
   =================================== */
.about {
    background: linear-gradient(180deg, var(--dark-bg) 0%, #0F1729 100%);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text h3 {
    margin-top: var(--spacing-32);
    margin-bottom: var(--spacing-16);
    color: var(--primary-blue);
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    margin-bottom: var(--spacing-20);
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-32);
    margin-top: var(--spacing-48);
}

.about-feature {
    display: flex;
    gap: var(--spacing-16);
    align-items: flex-start;
}

.about-feature i {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-top: var(--spacing-4);
}

.about-feature h4 {
    margin-bottom: var(--spacing-8);
    color: var(--text-primary);
}

.about-feature p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #1E7AE8 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
    padding: var(--spacing-48) 0;
}

.cta-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-16);
}

.cta-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-32);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-16);
}

.cta .button-primary {
    background-color: var(--text-primary);
    color: var(--primary-blue);
}

.cta .button-primary:hover {
    background-color: var(--dark-bg);
    color: var(--text-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: #0F1729;
    padding: var(--spacing-64) 0 var(--spacing-24);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-48);
    margin-bottom: var(--spacing-48);
}

.footer-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-12);
    margin-bottom: var(--spacing-16);
    font-size: 1.5rem;
}

.footer-title i {
    color: var(--primary-blue);
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-heading {
    margin-bottom: var(--spacing-20);
    color: var(--text-primary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-12);
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-blue);
}

.social-links {
    display: flex;
    gap: var(--spacing-16);
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: var(--card-bg);
    border-radius: var(--radius-8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background-color: var(--primary-blue);
    color: var(--text-primary);
    transform: translateY(-4px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-32);
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-blue);
    color: var(--text-primary);
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: 0 4px 12px rgba(46, 144, 250, 0.3);
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: #1E7AE8;
    transform: translateY(-4px);
}

/* ===================================
   Responsive Design
   =================================== */

/* Large Desktop (1440px+) */
@media screen and (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }
}

/* Desktop (1024px - 1439px) - Default styles apply */

/* Tablet (768px - 1023px) */
@media screen and (max-width: 1023px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .feature-detail,
    .feature-detail.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .feature-detail-image {
        order: -1;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* Mobile (320px - 767px) */
@media screen and (max-width: 767px) {
    :root {
        --header-height: 60px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--card-bg);
        padding: var(--spacing-64) var(--spacing-32);
        transition: right var(--transition-normal);
        box-shadow: -2px 0 8px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu.show-menu {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-24);
        align-items: flex-start;
    }
    
    .nav-toggle,
    .nav-close {
        display: block;
    }
    
    .nav-close {
        position: absolute;
        top: 1rem;
        right: 1rem;
    }
    
    .section {
        padding: var(--spacing-48) 0;
    }
    
    .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + var(--spacing-32));
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .button {
        width: 100%;
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
    }
    
    .phone-mockup i {
        font-size: 5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .platform-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-32);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta .button {
        width: 100%;
    }
    
    .screenshot-placeholder {
        height: 400px;
    }
    
    .mobile-mockup {
        width: 280px;
        padding: 14px 10px;
        border-radius: 28px;
    }
    
    .mobile-mockup::before {
        width: 100px;
        height: 20px;
        border-radius: 0 0 14px 14px;
    }
    
    .mobile-mockup::after {
        top: 11px;
        width: 8px;
        height: 8px;
    }
    
    .mobile-mockup-screen {
        border-radius: 16px;
    }
}

/* Touch-friendly tap targets on mobile */
@media (hover: none) and (pointer: coarse) {
    .button,
    .nav-link,
    .social-links a {
        min-height: 44px;
        min-width: 44px;
    }
}

/* ===================================
   Loading States & Animations
   =================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===================================
   Focus Styles for Accessibility
   =================================== */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .header,
    .nav-toggle,
    .scroll-top,
    .cta {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
}