/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #667eea;
    --primary-color-dark: #5a67d8;
    --secondary-color: #764ba2;
    --accent-color: #ff6b6b;
    --accent-color-dark: #ff5252;
    
    /* Neutral Colors */
    --white-color: #ffffff;
    --light-gray: #f8f9fa;
    --gray-color: #6c757d;
    --dark-gray: #343a40;
    --black-color: #000000;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-color-dark) 100%);
    
    /* Typography */
    --body-font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --heading-font: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
    /* Font Sizes */
    --small-font-size: 0.875rem;
    --normal-font-size: 1rem;
    --medium-font-size: 1.125rem;
    --large-font-size: 1.25rem;
    --h1-font-size: 3.5rem;
    --h2-font-size: 2.5rem;
    --h3-font-size: 1.5rem;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semi-bold: 600;
    --font-bold: 700;
    
    /* Spacing */
    --mb-0-25: 0.25rem;
    --mb-0-5: 0.5rem;
    --mb-0-75: 0.75rem;
    --mb-1: 1rem;
    --mb-1-5: 1.5rem;
    --mb-2: 2rem;
    --mb-2-5: 2.5rem;
    --mb-3: 3rem;
    
    /* Z-index */
    --z-tooltip: 10;
    --z-fixed: 100;
    --z-modal: 1000;
    
    /* Border Radius */
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    /* Box Shadow */
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --box-shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.5s ease;
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: var(--font-bold);
    line-height: 1.2;
    margin-bottom: var(--mb-1);
}

h1 { font-size: var(--h1-font-size); }
h2 { font-size: var(--h2-font-size); }
h3 { font-size: var(--h3-font-size); }

p {
    margin-bottom: var(--mb-1);
}

ul {
    list-style: none;
}

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

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

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

/* ===== REUSABLE CSS CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: 5rem 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--mb-3);
}

.section__title {
    font-size: var(--h2-font-size);
    color: var(--dark-gray);
    margin-bottom: var(--mb-1);
}

.section__subtitle {
    font-size: var(--large-font-size);
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-size: var(--medium-font-size);
    font-weight: var(--font-semi-bold);
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn--secondary {
    background: transparent;
    color: var(--white-color);
    border-color: var(--white-color);
}

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

.btn--large {
    padding: 1.25rem 3rem;
    font-size: var(--large-font-size);
}

.btn__icon {
    font-size: 1.25em;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--h3-font-size);
    font-weight: var(--font-bold);
    color: var(--primary-color);
}

.nav__logo-img {
    width: 40px;
    height: 40px;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav__link {
    font-weight: var(--font-medium);
    color: var(--dark-gray);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-gray);
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    color: var(--white-color);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 3s ease-in-out infinite;
}

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

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: var(--h1-font-size);
    margin-bottom: var(--mb-1-5);
    animation: fadeInUp 1s ease-out;
}

.hero__description {
    font-size: var(--large-font-size);
    margin-bottom: var(--mb-2);
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: var(--mb-3);
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero__stats {
    display: flex;
    gap: 2rem;
    animation: fadeInUp 1s ease-out 0.9s both;
}

.stat {
    text-align: center;
}

.stat__number {
    display: block;
    font-size: 2rem;
    font-weight: var(--font-bold);
    margin-bottom: var(--mb-0-25);
}

.stat__label {
    font-size: var(--small-font-size);
    opacity: 0.8;
}

.hero__image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.6s both;
}

.hero__img {
    max-width: 400px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

/* ===== FEATURES SECTION ===== */
.features {
    background: var(--white-color);
    padding: 6rem 0;
    position: relative;
    z-index: 2;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, rgba(37, 99, 235, 0.05), transparent);
    z-index: -1;
}

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

.feature__card {
    background: var(--white-color);
    padding: 2.5rem;
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(37, 99, 235, 0.1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.feature__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature__card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
    border-color: rgba(37, 99, 235, 0.3);
}

.feature__card:hover::before {
    transform: scaleX(1);
}

.feature__icon {
    font-size: 3rem;
    margin-bottom: var(--mb-1-5);
    display: block;
}

.feature__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-1);
    color: var(--dark-gray);
}

.feature__description {
    color: var(--gray-color);
    line-height: 1.6;
}

/* ===== DOWNLOAD SECTION ===== */
.download {
    background: var(--gradient-primary);
    color: var(--white-color);
    padding: 6rem 0;
    position: relative;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
}

.download__content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.download__info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.version__card {
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.version__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-1-5);
}

.version__details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.version__item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.version__item:last-child {
    border-bottom: none;
}

.version__label {
    font-weight: var(--font-medium);
    opacity: 0.8;
}

.version__value {
    font-weight: var(--font-bold);
}

.download__features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.feature__item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    backdrop-filter: blur(10px);
}

.feature__item .feature__icon {
    font-size: 2rem;
    margin-bottom: 0;
    flex-shrink: 0;
}

.feature__content h4 {
    font-size: var(--medium-font-size);
    margin-bottom: var(--mb-0-5);
}

.feature__content p {
    font-size: var(--small-font-size);
    opacity: 0.8;
    margin-bottom: 0;
}

.download__action {
    text-align: center;
}

.download__note {
    margin-top: var(--mb-1);
    font-size: var(--small-font-size);
    opacity: 0.8;
}

/* ===== SERVICES SECTION ===== */
.services {
    background: var(--light-gray);
    padding: 6rem 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: var(--mb-3);
}

.service__card {
    background: var(--white-color);
    padding: 2.5rem;
    border-radius: var(--border-radius-xl);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.service__card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.service__card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-xl);
}

.service__card:hover::before {
    opacity: 0.05;
}

.service__icon {
    font-size: 3rem;
    margin-bottom: var(--mb-1-5);
    display: block;
}

.service__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-1);
    color: var(--primary-color);
}

.service__description {
    color: var(--gray-color);
    margin-bottom: var(--mb-1-5);
}

.service__features {
    text-align: left;
}

.service__features li {
    padding: 0.25rem 0;
    color: var(--gray-color);
    position: relative;
    padding-left: 1.5rem;
}

.service__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: var(--font-bold);
}

/* ===== STATS SECTION ===== */
.stats {
    background: var(--gradient-primary);
    color: var(--white-color);
    padding: 4rem 0;
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat__card {
    padding: 2rem;
}

.stat__number {
    font-size: 3rem;
    font-weight: var(--font-bold);
    margin-bottom: var(--mb-0-5);
    display: block;
}

.stat__label {
    font-size: var(--medium-font-size);
    opacity: 0.8;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    background: var(--white-color);
    padding: 6rem 0;
}

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

.testimonial__card {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    position: relative;
    transition: var(--transition);
}

.testimonial__card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: 20px;
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.3;
    font-family: serif;
}

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

.testimonial__content {
    margin-bottom: var(--mb-1-5);
}

.testimonial__content p {
    font-style: italic;
    color: var(--dark-gray);
    line-height: 1.6;
    margin-bottom: 0;
}

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

.testimonial__avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-color);
    font-weight: var(--font-bold);
    font-size: var(--medium-font-size);
}

.testimonial__info h4 {
    font-size: var(--medium-font-size);
    margin-bottom: var(--mb-0-25);
    color: var(--dark-gray);
}

.testimonial__info span {
    font-size: var(--small-font-size);
    color: var(--gray-color);
}

/* ===== FAQ SECTION ===== */
.faq {
    background: var(--light-gray);
    padding: 6rem 0;
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
    margin-top: var(--mb-3);
}

.faq__item {
    background: var(--white-color);
    border-radius: var(--border-radius-lg);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.faq__item:hover {
    box-shadow: var(--box-shadow-lg);
}

.faq__question {
    background: var(--primary-color);
    color: var(--white-color);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq__question:hover {
    background: var(--primary-color-dark);
}

.faq__icon {
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    transition: var(--transition);
}

.faq__answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-slow);
}

.faq__answer.active {
    padding: 1.5rem;
    max-height: 200px;
}

.faq__answer p {
    color: var(--gray-color);
    line-height: 1.6;
    margin-bottom: 0;
}

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

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: var(--mb-3);
}

.footer__section h3 {
    color: var(--primary-color);
    margin-bottom: var(--mb-1-5);
}

.footer__description {
    color: var(--gray-color);
    margin-bottom: var(--mb-1-5);
    line-height: 1.6;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--mb-1);
}

.footer__logo-img {
    width: 30px;
    height: 30px;
}

.footer__logo-text {
    font-size: var(--h3-font-size);
    font-weight: var(--font-bold);
    color: var(--primary-color);
}

.footer__social {
    display: flex;
    gap: 1rem;
}

.social__link {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social__link:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

.social__icon {
    font-size: 1.25rem;
}

.footer__list li {
    margin-bottom: var(--mb-0-75);
}

.footer__link {
    color: var(--gray-color);
    transition: var(--transition);
}

.footer__link:hover {
    color: var(--white-color);
}

.contact__icon {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.footer__bottom {
    border-top: 1px solid var(--gray-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer__copyright {
    color: var(--gray-color);
}

.footer__legal {
    display: flex;
    gap: 1.5rem;
}

/* ===== FLOATING ACTION BUTTON ===== */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    color: var(--white-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--box-shadow-lg);
    transition: var(--transition);
    z-index: var(--z-tooltip);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.fab.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fab:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-xl);
}

.fab__icon {
    font-size: 1.5rem;
    font-weight: var(--font-bold);
}

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading__spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid var(--white-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--mb-1);
}

.loading__text {
    color: var(--white-color);
    font-size: var(--medium-font-size);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__buttons {
        justify-content: center;
    }
    
    .hero__stats {
        justify-content: center;
    }
    
    .download__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --h1-font-size: 2.5rem;
        --h2-font-size: 2rem;
        --h3-font-size: 1.25rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white-color);
        padding: 2rem 0;
        box-shadow: var(--box-shadow);
        flex-direction: column;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav__menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .hero__buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero__stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .features__grid,
    .services__grid,
    .testimonials__grid {
        grid-template-columns: 1fr;
    }
    
    .download__features {
        grid-template-columns: 1fr;
    }
    
    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer__bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer__legal {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: var(--normal-font-size);
    }
    
    .btn--large {
        padding: 1rem 2rem;
    }
    
    .feature__card,
    .service__card {
        padding: 1.5rem;
    }
    
    .stats__grid {
        grid-template-columns: 1fr;
    }
    
    .fab {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--mb-1); }
.mb-2 { margin-bottom: var(--mb-2); }
.mb-3 { margin-bottom: var(--mb-3); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--mb-1); }
.mt-2 { margin-top: var(--mb-2); }
.mt-3 { margin-top: var(--mb-3); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }

.shadow { box-shadow: var(--box-shadow); }
.shadow-lg { box-shadow: var(--box-shadow-lg); }
.shadow-xl { box-shadow: var(--box-shadow-xl); }

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.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;
}

/* ===== PAGE STYLES ===== */
.main-content {
    padding-top: 80px;
    min-height: calc(100vh - 200px);
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    margin-bottom: 3rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

.content-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.content-section h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 2rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

.content-section h2:first-child {
    margin-top: 0;
}

.content-section p {
    line-height: 1.7;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.content-section ul,
.content-section ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.content-section li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.content-section strong {
    color: var(--primary-color);
    font-weight: 600;
}

.nav__logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
}

.nav__logo-link:hover {
    color: var(--primary-color);
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .fab,
    .loading-overlay {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .section {
        padding: 2rem 0;
    }
    
    * {
        color: black !important;
        background: white !important;
    }
}