/* ========================================
   YELLOW IPTV - LANDING PAGE
   Design Moderno e Tecnológico
   ======================================== */

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

:root {
    /* Colors - Yellow Theme */
    --primary-color: #FFD700;
    --primary-dark: #FFA500;
    --primary-light: #FFED4E;
    --secondary-color: #1a1a1a;
    --secondary-light: #2d2d2d;
    --accent-color: #FF6B35;
    --text-color: #333;
    --text-light: #666;
    --text-dark: #000;
    --bg-color: #ffffff;
    --bg-dark: #0a0a0a;
    --bg-gray: #f5f5f5;
    --success-color: #25D366;
    --border-color: #e0e0e0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(255, 215, 0, 0.9) 0%, rgba(255, 165, 0, 0.9) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-round: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    --shadow-primary: 0 8px 24px rgba(255, 215, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 100;
    --z-modal: 1000;
    --z-floating: 500;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

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

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn__primary {
    background: var(--gradient-primary);
    color: var(--text-dark);
    box-shadow: var(--shadow-primary);
}

.btn__primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255, 215, 0, 0.4);
}

.btn__secondary {
    background: transparent;
    color: var(--text-dark);
    border: 2px solid var(--primary-color);
}

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

.btn__large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn i {
    font-size: 1.25em;
}

/* ========== HEADER & NAVIGATION ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-header);
    transition: all var(--transition-base);
}

.header.scroll {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--text-dark);
}

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

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    list-style: none;
}

.nav__link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav__cta {
    background: var(--gradient-primary);
    color: var(--text-dark);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 700;
}

.nav__toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

/* ========== HERO SECTION ========== */
.hero {
    position: relative;
    padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xxl);
    background: linear-gradient(135deg, #fafafa 0%, #ffffff 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 165, 0, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero__content {
    position: relative;
    z-index: 2;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

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

.hero__title {
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero__description {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero__price {
    background: var(--gradient-dark);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.price__tag {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: var(--spacing-xs);
}

.price__currency {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price__value {
    font-size: 4rem;
    font-weight: 900;
    color: var(--primary-color);
    line-height: 1;
}

.price__period {
    font-size: 1.5rem;
    color: #999;
}

.price__note {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--bg-gray);
    font-size: 0.875rem;
}

.price__note i {
    color: var(--success-color);
}

.hero__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero__features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.feature__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.875rem;
}

.feature__item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.hero__image {
    position: relative;
    animation: fadeInRight 0.8s ease;
}

.hero__screen {
    position: relative;
    z-index: 2;
}

.screen__frame {
    background: var(--gradient-dark);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.screen__frame::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, var(--primary-color), transparent 30deg);
    animation: rotate 4s linear infinite;
    opacity: 0.5;
}

.screen__icon {
    font-size: 3rem;
    color: var(--primary-color);
    display: block;
    text-align: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.screen__content {
    position: relative;
    z-index: 2;
}

.channel__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.channel__item {
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 700;
    color: var(--primary-color);
    animation: pulse 2s ease-in-out infinite;
}

.channel__item:nth-child(even) {
    animation-delay: 0.3s;
}

.hero__wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 120px;
    overflow: hidden;
}

.hero__wave svg {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 120px;
    fill: var(--bg-color);
}

/* ========== SECTION HEADERS ========== */
.section__header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.section__badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.section__title {
    margin-bottom: var(--spacing-md);
}

.section__description {
    font-size: 1.125rem;
    color: var(--text-light);
}

/* ========== BENEFITS SECTION ========== */
.benefits {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-color);
}

.benefits__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.benefit__card {
    background: var(--bg-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.benefit__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.benefit__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-dark);
    box-shadow: var(--shadow-primary);
}

.benefit__card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.benefit__card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* ========== DEVICES SECTION ========== */
.devices {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-gray);
}

.devices__tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.tab__button {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-weight: 600;
    color: var(--text-color);
}

.tab__button i {
    font-size: 1.5rem;
}

.tab__button:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.tab__button.active {
    background: var(--gradient-primary);
    border-color: var(--primary-color);
    color: var(--text-dark);
    box-shadow: var(--shadow-primary);
}

.tab__content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab__content.active {
    display: block;
}

.device__content {
    background: var(--bg-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.device__info h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.device__info h3 i {
    color: var(--primary-color);
}

.device__subtitle {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.device__platforms {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.device__platforms span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.device__steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.step__number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    color: var(--text-dark);
    box-shadow: var(--shadow-sm);
}

.step__content h4 {
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.step__content p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.code__box {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-gray);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    margin: 0.5rem 0;
}

.code__box code {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.875rem;
}

.copy__btn {
    background: var(--primary-color);
    border: none;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-dark);
}

.copy__btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.copy__btn.copied {
    background: var(--success-color);
}

.or__text {
    text-align: center;
    color: var(--text-light);
    font-weight: 600;
    margin: var(--spacing-sm) 0;
}

.device__note {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(37, 211, 102, 0.1);
    border-left: 4px solid var(--success-color);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.device__note i {
    color: var(--success-color);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.device__note p {
    color: var(--text-color);
    line-height: 1.6;
}

.app__options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.app__option {
    background: var(--bg-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    position: relative;
}

.app__option.recommended {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-primary);
}

.app__badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: var(--text-dark);
    font-weight: 700;
    font-size: 0.75rem;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.app__badge.alternative {
    background: var(--gradient-dark);
    color: var(--primary-color);
}

.app__option h4 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.app__option h4 i {
    color: var(--primary-color);
}

.app__option > p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.download__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.download__option {
    padding: var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--radius-md);
}

.download__option > p {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.downloader__code {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.downloader__code strong {
    color: var(--primary-dark);
    font-weight: 700;
}

/* ========== PRICING SECTION ========== */
.pricing {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-color);
}

.pricing__card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-gray);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--primary-color);
}

.pricing__header {
    background: var(--gradient-dark);
    padding: var(--spacing-xl);
    text-align: center;
}

.pricing__badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: var(--text-dark);
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.pricing__header h3 {
    color: var(--bg-color);
    margin-bottom: var(--spacing-md);
}

.pricing__price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.pricing__note {
    color: var(--text-light);
    font-size: 0.875rem;
}

.pricing__features {
    padding: var(--spacing-xl);
}

.pricing__features h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

.pricing__features ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.pricing__features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-color);
}

.pricing__features li i {
    color: var(--success-color);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.pricing__cta {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    text-align: center;
}

.pricing__cta .btn {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.pricing__guarantee {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.875rem;
}

.pricing__guarantee i {
    color: var(--success-color);
}

/* ========== FAQ SECTION ========== */
.faq {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-gray);
}

.faq__container {
    max-width: 800px;
    margin: 0 auto;
}

.faq__item {
    background: var(--bg-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.faq__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: all var(--transition-fast);
}

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

.faq__question i {
    transition: transform var(--transition-base);
    color: var(--primary-color);
}

.faq__item.active .faq__question i {
    transform: rotate(180deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq__item.active .faq__answer {
    max-height: 500px;
}

.faq__answer p {
    padding: 0 var(--spacing-lg) var(--spacing-md);
    color: var(--text-light);
    line-height: 1.8;
}

.faq__answer strong {
    color: var(--text-dark);
}

/* ========== CONTACT SECTION ========== */
.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-color);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact__card {
    background: var(--gradient-dark);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-lg);
}

.contact__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--success-color);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

.contact__card h3 {
    color: var(--bg-color);
    margin-bottom: var(--spacing-sm);
}

.contact__card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.contact__link {
    display: inline-block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.contact__link:hover {
    color: var(--primary-light);
    transform: scale(1.05);
}

.contact__benefits {
    background: rgba(255, 215, 0, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--primary-color);
}

.contact__benefits h4 {
    margin-bottom: var(--spacing-md);
}

.contact__benefits ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact__benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-color);
}

.contact__benefits li i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.contact__form {
    background: var(--bg-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.contact__form h3 {
    margin-bottom: var(--spacing-sm);
}

.contact__form > p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

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

.form__group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-dark);
}

.form__group label i {
    color: var(--primary-color);
}

.form__group input,
.form__group select,
.form__group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--bg-color);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.form__group textarea {
    resize: vertical;
    min-height: 100px;
}

.contact__form .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

.form__note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    color: var(--text-light);
    font-size: 0.875rem;
}

.form__note i {
    color: var(--success-color);
}

/* ========== FOOTER ========== */
.footer {
    background: var(--bg-dark);
    color: var(--bg-gray);
    padding: var(--spacing-xxl) 0 var(--spacing-md);
}

.footer__content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__brand {
    max-width: 300px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--bg-color);
    margin-bottom: var(--spacing-md);
}

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

.footer__brand > p {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.footer__social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer__social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 215, 0, 0.1);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    background: var(--primary-color);
    color: var(--text-dark);
    transform: translateY(-3px);
}

.footer__column h4 {
    color: var(--bg-color);
    margin-bottom: var(--spacing-md);
}

.footer__column ul {
    list-style: none;
}

.footer__column li {
    margin-bottom: var(--spacing-sm);
}

.footer__column a {
    color: var(--bg-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer__column a:hover {
    color: var(--primary-color);
}

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

.footer__bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #999;
}

.footer__bottom p {
    margin: 0.5rem 0;
}

/* ========== WHATSAPP FLOATING BUTTON ========== */
.whatsapp__float {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background: var(--success-color);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    z-index: var(--z-floating);
    transition: all var(--transition-base);
    animation: pulse 2s ease-in-out infinite;
}

.whatsapp__float:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.5);
    animation: none;
}

.whatsapp__tooltip {
    position: absolute;
    right: 70px;
    background: var(--text-dark);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-fast);
}

.whatsapp__float:hover .whatsapp__tooltip {
    opacity: 1;
    right: 80px;
}

/* ========== MODAL ========== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

.modal__content {
    background: var(--bg-color);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    max-width: 500px;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: scaleIn 0.3s ease;
}

.modal__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: rgba(37, 211, 102, 0.1);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--success-color);
}

.modal__content h3 {
    margin-bottom: var(--spacing-md);
}

.modal__content p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero__buttons {
        justify-content: center;
    }
    
    .hero__features {
        justify-content: center;
    }
    
    .contact__content {
        grid-template-columns: 1fr;
    }
    
    .footer__content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .nav__menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        transition: left var(--transition-base);
    }
    
    .nav__menu.show {
        left: 0;
    }
    
    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }
    
    .nav__link {
        display: block;
        padding: var(--spacing-sm);
        text-align: center;
    }
    
    .nav__toggle {
        display: block;
    }
    
    .hero {
        padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .benefits__grid {
        grid-template-columns: 1fr;
    }
    
    .devices__tabs {
        flex-direction: column;
    }
    
    .tab__button {
        flex-direction: row;
        justify-content: flex-start;
    }
    
    .device__content {
        padding: var(--spacing-md);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
    }
    
    .whatsapp__float {
        bottom: 1rem;
        right: 1rem;
        width: 56px;
        height: 56px;
        font-size: 1.75rem;
    }
    
    .whatsapp__tooltip {
        display: none;
    }
}

@media (max-width: 480px) {
    .price__value {
        font-size: 3rem;
    }
    
    .price__currency {
        font-size: 1.5rem;
    }
    
    .price__period {
        font-size: 1.125rem;
    }
    
    .hero__buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero__buttons .btn {
        width: 100%;
    }
    
    .channel__grid {
        grid-template-columns: 1fr;
    }
    
    .step__item {
        flex-direction: column;
    }
}