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

:root {
    /* Colors */
    --primary-color: #0F172A;
    --accent-blue: #0EA5E9;
    --accent-green: #10B981;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-light: #94A3B8;
    --background-light: #F8FAFC;
    --background-alt: #F1F5F9;
    --white: #FFFFFF;
    --border-color: #E2E8F0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--white);
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--spacing-8);
    }
}

/* Section */
.section {
    padding: var(--spacing-16) 0;
}

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

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-12);
    color: var(--primary-color);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
}

.nav__logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-8);
}

.nav__link {
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav__link:hover,
.nav__link.active {
    color: var(--accent-blue);
}

.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-blue);
    border-radius: 1px;
}

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

.nav__toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-6);
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav__menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    min-height: 48px;
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

.btn--outline {
    background: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.btn--outline:hover {
    background: var(--accent-blue);
    color: var(--white);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, #1E293B 50%, var(--primary-color) 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-6);
    background: linear-gradient(135deg, var(--white), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__tagline {
    font-size: var(--font-size-xl);
    color: var(--accent-green);
    margin-bottom: var(--spacing-4);
    font-weight: 500;
}

.hero__description {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-8);
    line-height: 1.7;
}

.hero__visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__orb {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, var(--accent-blue), var(--accent-green));
    border-radius: 50%;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
    filter: blur(1px);
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(14, 165, 233, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(14, 165, 233, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

@keyframes grid-move {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

@media (min-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
    
    .hero__content {
        margin: 0;
    }
    
    .hero__title {
        font-size: var(--font-size-6xl);
    }
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color), #1E293B);
    padding: var(--spacing-20) 0 var(--spacing-16);
    text-align: center;
    margin-top: 80px;
}

.page-header__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--spacing-4);
}

.page-header__subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-8);
}

.feature__card {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.feature__icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-6);
    color: var(--white);
}

.feature__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--primary-color);
}

.feature__description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-color), #1E293B);
    color: var(--white);
}

.cta__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
}

.cta__description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-8);
    opacity: 0.9;
    line-height: 1.7;
}

.cta__buttons {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* About Page Styles */
.about__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    align-items: center;
}

.about__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--primary-color);
}

.about__subtitle {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: var(--spacing-8) 0 var(--spacing-4);
    color: var(--primary-color);
}

.about__text {
    margin-bottom: var(--spacing-6);
    color: var(--text-secondary);
    line-height: 1.7;
}

.about__list {
    list-style: none;
    margin-bottom: var(--spacing-6);
}

.about__list li {
    padding: var(--spacing-2) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-6);
}

.about__list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 600;
}

.about__image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 1024px) {
    .about__grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--accent-blue);
}

.timeline__item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-12);
    position: relative;
}

.timeline__item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline__year {
    background: var(--accent-blue);
    color: var(--white);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-lg);
    font-weight: 600;
    margin: 0 var(--spacing-6);
    min-width: 80px;
    text-align: center;
    position: relative;
    z-index: 2;
}

.timeline__content {
    background: var(--white);
    padding: var(--spacing-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    flex: 1;
    max-width: 300px;
}

.timeline__content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--primary-color);
}

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

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }
    
    .timeline__item,
    .timeline__item:nth-child(odd) {
        flex-direction: row;
        padding-left: var(--spacing-12);
    }
    
    .timeline__year {
        position: absolute;
        left: 0;
        margin: 0;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: var(--font-size-sm);
    }
    
    .timeline__content {
        margin-left: var(--spacing-8);
        max-width: none;
    }
}

/* Team Section */
.team__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-8);
}

.team__member {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.team__avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto var(--spacing-6);
    border: 4px solid var(--accent-blue);
}

.team__name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--primary-color);
}

.team__role {
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: var(--spacing-4);
}

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

/* Projects Page */
.projects__filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-12);
    flex-wrap: wrap;
}

.filter__btn {
    padding: var(--spacing-2) var(--spacing-4);
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
    color: var(--text-secondary);
}

.filter__btn:hover,
.filter__btn--active {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: rgba(14, 165, 233, 0.1);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
}

.project__card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.project__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project__image {
    height: 200px;
    overflow: hidden;
}

.project__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project__card:hover .project__image img {
    transform: scale(1.1);
}

.project__content {
    padding: var(--spacing-6);
}

.project__category {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: var(--white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    margin-bottom: var(--spacing-4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--primary-color);
}

.project__description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

.project__status {
    display: inline-block;
    background: var(--background-alt);
    color: var(--accent-green);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Articles Page */
.articles__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: var(--spacing-8);
}

.article__card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

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

.article__image {
    height: 200px;
    overflow: hidden;
}

.article__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article__card:hover .article__image img {
    transform: scale(1.05);
}

.article__content {
    padding: var(--spacing-6);
}

.article__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.article__category {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: var(--white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article__date {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.article__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--primary-color);
    line-height: 1.4;
}

.article__excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
}

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

.article__author {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.article__author img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.article__author span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.article__read-time {
    font-size: var(--font-size-sm);
    color: var(--text-light);
}

/* Contact Page */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
}

.contact__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--primary-color);
}

.contact__description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-8);
}

.contact__details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.contact__icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.contact__text h4 {
    font-weight: 600;
    margin-bottom: var(--spacing-1);
    color: var(--primary-color);
}

.contact__text p {
    color: var(--text-secondary);
    line-height: 1.5;
}

@media (min-width: 1024px) {
    .contact__grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Form Styles */
.form {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form__group {
    margin-bottom: var(--spacing-6);
}

.form__label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 500;
    color: var(--text-primary);
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: var(--white);
    color: var(--text-primary);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__error {
    display: block;
    color: #EF4444;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-1);
}

.form__success {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: #F0FDF4;
    color: #16A34A;
    padding: var(--spacing-4);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-4);
    border: 1px solid #BBF7D0;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer__brand h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    background: linear-gradient(135deg, var(--white), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer__brand p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer__links h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

.footer__links ul {
    list-style: none;
}

.footer__links li {
    margin-bottom: var(--spacing-2);
}

.footer__links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--accent-blue);
}

.footer__social h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
}

.social__links {
    display: flex;
    gap: var(--spacing-4);
}

.social__links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-fast);
}

.social__links a:hover {
    background: var(--accent-blue);
    transform: translateY(-2px);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* Utility Classes */
.hidden {
    display: none;
}

.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;
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Smooth Scroll Offset */
html {
    scroll-padding-top: 80px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .nav__toggle,
    .btn {
        display: none;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-8) 0;
    }
    
    .page-header {
        margin-top: 0;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #000000;
        --border-color: #000000;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus Styles */
.btn:focus,
.form__input:focus,
.form__select:focus,
.form__textarea:focus,
.nav__link:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Error States */
.form__input.error,
.form__select.error,
.form__textarea.error {
    border-color: #EF4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Success States */
.form__input.success,
.form__select.success,
.form__textarea.success {
    border-color: #16A34A;
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}