/* ===================================
   CSS Variables
   =================================== */
:root {
    --primary-color: #86339D;
    --primary-dark: #6B2880;
    --primary-light: #A14BB8;
    --secondary-color: #228CCD;
    --secondary-dark: #1B6FA3;
    --secondary-light: #4AA3D9;
    --accent-color: #B368C9;
    --dark-color: #2C3E50;
    --light-color: #ECF0F1;
    --text-color: #34495E;
    --text-light: #7F8C8D;
    --success-color: #2ECC71;
    --danger-color: #E74C3C;
    --warning-color: #F39C12;
    --white: #FFFFFF;
    --gradient-primary: linear-gradient(135deg, #86339D 0%, #228CCD 100%);
    --gradient-secondary: linear-gradient(135deg, #228CCD 0%, #4AA3D9 100%);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.2);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 12px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--white);
}

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

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul {
    list-style: none;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-color);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }

p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-light);
}

/* ===================================
   Container & Layout
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-brand .logo {
    height: 36px;
    width: auto;
    transition: transform 0.3s ease;
}

.nav-brand .brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-brand:hover .logo {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    position: relative;
    padding: 0.5rem 0;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.3rem;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding-top: 8rem;
    padding-bottom: 5rem;
    background: linear-gradient(135deg, #F3E8F9 0%, #E3F4FB 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--white);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: var(--white);
    color: var(--text-color);
    border: 2px solid var(--light-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-item h3 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
}

.stat-item p {
    font-size: 0.875rem;
}

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

.phone-mockup-img {
    width: 300px;
    height: auto;
    max-width: 100%;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    animation: float 6s ease-in-out infinite;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: var(--gradient-primary);
    border-radius: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

.phone-mockup i {
    font-size: 8rem;
    color: var(--white);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 80px;
    fill: var(--white);
}

/* ===================================
   Section Header
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Features Section
   =================================== */
.features {
    background-color: var(--white);
}

.role-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.role-tab {
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    background-color: var(--light-color);
    color: var(--text-color);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.role-tab.active {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.role-content {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.role-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon i {
    font-size: 1.75rem;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.feature-card p {
    font-size: 0.9375rem;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.timeline-icon i {
    font-size: 2rem;
    color: var(--white);
}

.timeline-content {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    width: calc(50% - 60px);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
}

.timeline-content h3 {
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

/* ===================================
   Technology Section
   =================================== */
/* ===================================
   Security Section
   =================================== */
.security {
    background-color: var(--dark-color);
    color: var(--white);
}

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

.security .section-title,
.security .section-description {
    color: var(--white);
}

.security-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.security-card {
    background: linear-gradient(135deg, rgba(134, 51, 157, 0.1) 0%, rgba(34, 140, 205, 0.1) 100%);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    border: 2px solid rgba(134, 51, 157, 0.3);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.security-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(134, 51, 157, 0.3);
}

.security-card-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(134, 51, 157, 0.4);
}

.security-card-icon i {
    font-size: 2rem;
    color: var(--white);
}

.security-card h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.security-card > p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.security-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
}

.security-list li i {
    color: var(--secondary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

/* ===================================
   Download Section
   =================================== */
.download {
    background: var(--gradient-primary);
    color: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.download-text h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.download-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background-color: var(--white);
    color: var(--dark-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-download i {
    font-size: 2.5rem;
}

.btn-download small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
}

.btn-download strong {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
}

.download-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.download-links a {
    color: var(--white);
    text-decoration: underline;
    font-size: 0.875rem;
}

.phone-mockup-img-large {
    width: 350px;
    height: auto;
    max-width: 100%;
    filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.4));
    margin: 0 auto;
    display: block;
}

.phone-mockup-large {
    width: 350px;
    height: 700px;
    background-color: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    margin: 0 auto;
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.phone-mockup-large i {
    font-size: 10rem;
    color: var(--white);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background-color: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #F8F9FA 0%, #E9ECEF 100%);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.contact-card p {
    margin-bottom: 1rem;
}

.contact-card a {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.contact-card a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.contact-loading,
.contact-error {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, rgba(134, 51, 157, 0.05) 0%, rgba(34, 140, 205, 0.05) 100%);
    border-radius: var(--border-radius);
    border: 2px dashed var(--primary-color);
}

.contact-loading i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    animation: spin 1s linear infinite;
}

.contact-error i {
    font-size: 3rem;
    color: #dc3545;
    margin-bottom: 1rem;
}

.contact-loading p,
.contact-error p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-logo i {
    font-size: 1.75rem;
}

.footer-col p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
}

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

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.scroll-top:hover {
    transform: translateY(-5px);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-image {
        order: -1;
    }

    .hero-buttons {
        justify-content: center;
    }

    .download-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .download-buttons {
        justify-content: center;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-icon {
        left: 30px;
        transform: translateX(-50%);
    }

    .timeline-content {
        width: 100%;
        margin: 0 !important;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 6rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .phone-mockup-img {
        width: 250px;
    }

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

    .phone-mockup i {
        font-size: 6rem;
    }

    .phone-mockup-img-large {
        width: 250px;
    }

    .phone-mockup-large {
        width: 250px;
        height: 500px;
    }

    .phone-mockup-large i {
        font-size: 6rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

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

    .security-cards {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    section {
        padding: 3rem 0;
    }

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

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

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

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

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

.text-secondary {
    color: var(--secondary-color);
}

.bg-light {
    background-color: var(--light-color);
}

.bg-dark {
    background-color: var(--dark-color);
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.pt-1 { padding-top: 0.5rem; }
.pt-2 { padding-top: 1rem; }
.pt-3 { padding-top: 1.5rem; }
.pt-4 { padding-top: 2rem; }
.pt-5 { padding-top: 3rem; }

.pb-1 { padding-bottom: 0.5rem; }
.pb-2 { padding-bottom: 1rem; }
.pb-3 { padding-bottom: 1.5rem; }
.pb-4 { padding-bottom: 2rem; }
.pb-5 { padding-bottom: 3rem; }