/* ===================================
   CSS MODERNO & ATUALIZADO - 2026
   Design System com Variáveis CSS
   =================================== */

/* CSS VARIABLES (Design System) */
:root {
    /* Colors */
    --color-primary: #003399;
    --color-primary-light: #0052cc;
    --color-secondary: #FFD700;
    --color-accent: #25D366;
    --color-white: #ffffff;
    --color-dark: #1a1a1a;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-400: #9ca3af;
    --color-gray-600: #4b5563;
    --color-success: #10b981;
    --color-error: #ef4444;

    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 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-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing Scale */
    --spacing-2xs: 0.25rem;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
    --spacing-3xl: 3rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 5rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows (Modern) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Z-Index */
    --z-sticky: 1020;
    --z-modal: 1040;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-base);
    color: var(--color-dark);
    background-color: var(--color-white);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

h1, h2, h3 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
}

p {
    color: var(--color-gray-600);
}

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

/* HEADER */
header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    background-color: rgba(0, 51, 153, 0.95);
    box-shadow: var(--shadow-lg);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
}

.logo {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-secondary);
    letter-spacing: -0.5px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo i {
    filter: drop-shadow(0 2px 4px rgba(255, 215, 0, 0.4));
    animation: float 3s ease-in-out infinite;
}

nav {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

nav a {
    color: var(--color-white);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    transition: color var(--transition-normal);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width var(--transition-normal);
}

nav a:hover {
    color: var(--color-secondary);
}

nav a:hover::after {
    width: 100%;
}

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-secondary) 100%);
    color: var(--color-white);
    padding: calc(var(--spacing-5xl) + 60px) var(--spacing-lg) var(--spacing-5xl);
    text-align: center;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    animation: slideInDown 0.6s ease;
}

.hero p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-3xl);
    position: relative;
    z-index: 1;
    color: rgba(255, 255, 255, 0.95);
    animation: slideInUp 0.6s ease 0.1s both;
}

.hero-image {
    margin-top: var(--spacing-3xl);
    position: relative;
    z-index: 1;
    animation: slideInUp 0.6s ease 0.3s both;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-normal);
    display: block;
    max-height: 400px;
    object-fit: cover;
}

.hero-image img:hover {
    transform: scale(1.02) translateY(-5px);
}

/* CTA BUTTON */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #ffc700 100%);
    color: var(--color-primary);
    padding: var(--spacing-md) var(--spacing-3xl);
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
    position: relative;
    z-index: 1;
    animation: slideInUp 0.6s ease 0.2s both;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(255, 215, 0, 0.5);
}

.cta-button:active {
    transform: translateY(-1px);
}

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

section {
    padding: var(--spacing-5xl) var(--spacing-lg);
}

/* SECTION TITLES */
.section-title {
    text-align: center;
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-5xl);
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-full);
}

/* FEATURES */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-5xl);
}

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-primary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 51, 153, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-top-color: var(--color-secondary);
}

.feature-card:hover .feature-icon {
    transform: perspective(1000px) rotateX(10deg) rotateY(10deg) scale(1.15);
    filter: drop-shadow(0 8px 16px rgba(0, 51, 153, 0.5)) drop-shadow(0 4px 8px rgba(0, 51, 153, 0.3));
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 8px rgba(0, 51, 153, 0.3)) drop-shadow(0 2px 4px rgba(0, 51, 153, 0.2));
    transition: all var(--transition-normal);
    transform: perspective(1000px) rotateX(0deg) rotateY(0deg);
    will-change: transform;
}

.feature-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.feature-card p {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

/* ABOUT */
#sobre {
    background: linear-gradient(180deg, var(--color-gray-50) 0%, var(--color-white) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    margin-bottom: var(--spacing-5xl);
    animation: slideInUp 0.6s ease;
}

.about-image {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-normal);
    border-radius: var(--radius-xl);
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-gray-600);
}

.about-text p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-gray-600);
}

/* FORM */
#orcamento {
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-50) 100%);
}

.form-container {
    background: var(--color-white);
    padding: var(--spacing-4xl);
    border-radius: var(--radius-xl);
    max-width: 700px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
    border-left: 5px solid var(--color-primary);
    border-right: 5px solid var(--color-secondary);
    animation: slideInUp 0.5s ease;
}

.form-group {
    margin-bottom: var(--spacing-2xl);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    letter-spacing: 0.3px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-family: var(--font-family-base);
    transition: all var(--transition-normal);
    background-color: var(--color-gray-50);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(0, 51, 153, 0.1);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

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

.form-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

/* BUTTONS */
button[type="submit"],
.whatsapp-btn {
    padding: var(--spacing-lg) var(--spacing-2xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-family: var(--font-family-base);
    text-decoration: none;
}

button[type="submit"] i,
.whatsapp-btn i {
    transition: transform var(--transition-normal);
}

button[type="submit"]:hover i,
.whatsapp-btn:hover i {
    transform: scale(1.2) rotate(5deg);
}

button[type="submit"] {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

button[type="submit"]::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-normal);
}

button[type="submit"]:hover::before {
    left: 100%;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

button[type="submit"]:active {
    transform: translateY(0);
}

.whatsapp-btn {
    background: linear-gradient(135deg, #25D366 0%, #20ba5a 100%);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.whatsapp-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-normal);
}

.whatsapp-btn:hover::before {
    left: 100%;
}

.whatsapp-btn:hover {
    background: linear-gradient(135deg, #20ba5a 0%, #1a9d4a 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* MESSAGES */
.success-message,
.error-message {
    display: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    font-weight: var(--font-weight-semibold);
    animation: slideDown 0.3s ease;
    box-shadow: var(--shadow-md);
}

.success-message {
    background-color: var(--color-success);
    color: var(--color-white);
}

.error-message {
    background-color: var(--color-error);
    color: var(--color-white);
}

.success-message.show,
.error-message.show {
    display: block;
}

/* INPUT GROUP */
.input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.currency-symbol {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-gray-50);
    border-radius: var(--radius-lg) 0 0 var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    border-right: none;
}

.input-group input {
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    border-left: none;
}

.input-group input:focus {
    border-color: var(--color-primary);
}

/* PERÍODO OPTIONS */
.periodo-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

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

.checkbox-group input[type="radio"] {
    margin-top: var(--spacing-sm);
    cursor: pointer;
    accent-color: var(--color-primary);
    width: 20px;
    height: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
    user-select: none;
}

.checkbox-label i {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.checkbox-group input[type="radio"]:checked + .checkbox-label {
    color: var(--color-primary);
}

.checkbox-group input[type="radio"]:checked + .checkbox-label i {
    filter: drop-shadow(0 2px 4px rgba(0, 51, 153, 0.3));
    transform: scale(1.1);
}

/* FOOTER */
footer {
    background: linear-gradient(135deg, var(--color-primary) 0%, #001a66 100%);
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    border-top: 4px solid var(--color-secondary);
}

footer p {
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.95);
}

.contact-info {
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

/* ANIMATIONS */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes iconPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 51, 153, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 51, 153, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 51, 153, 0);
    }
}

@keyframes glow {
    0%, 100% {
        filter: drop-shadow(0 4px 8px rgba(0, 51, 153, 0.3)) drop-shadow(0 2px 4px rgba(0, 51, 153, 0.2));
    }
    50% {
        filter: drop-shadow(0 6px 12px rgba(0, 51, 153, 0.5)) drop-shadow(0 4px 8px rgba(0, 51, 153, 0.4));
    }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --spacing-5xl: 3rem;
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        padding: var(--spacing-md) var(--spacing-lg);
    }

    nav {
        gap: var(--spacing-lg);
        flex-wrap: wrap;
        justify-content: center;
    }

    nav a {
        font-size: var(--font-size-xs);
    }

    .hero {
        padding: calc(var(--spacing-4xl) + 60px) var(--spacing-lg) var(--spacing-4xl);
    }

    .hero h1 {
        font-size: var(--font-size-4xl);
    }

    .hero p {
        font-size: var(--font-size-base);
    }

    .hero-image img {
        max-height: 300px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .section-title {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-3xl);
    }

    .features {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .form-container {
        padding: var(--spacing-2xl);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    button[type="submit"],
    .whatsapp-btn {
        width: 100%;
    }

    section {
        padding: var(--spacing-3xl) var(--spacing-lg);
    }

    .feature-card {
        padding: var(--spacing-2xl);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.875rem;
        --font-size-4xl: 1.5rem;
        --spacing-5xl: 2rem;
        --spacing-4xl: 1.5rem;
    }

    .logo {
        font-size: var(--font-size-lg);
    }

    header {
        padding: var(--spacing-md) 0;
    }

    nav {
        gap: var(--spacing-md);
    }

    .hero h1 {
        font-size: var(--font-size-3xl);
    }

    .hero p {
        font-size: var(--font-size-sm);
    }

    .cta-button {
        padding: var(--spacing-sm) var(--spacing-xl);
        font-size: var(--font-size-sm);
    }

    .section-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-2xl);
    }

    .section-title::after {
        width: 60px;
    }

    .form-container {
        padding: var(--spacing-lg);
        border-left-width: 3px;
        border-right-width: 3px;
    }

    button[type="submit"],
    .whatsapp-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }

    footer {
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .contact-info {
        font-size: var(--font-size-xs);
    }
}

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

/* DARK MODE */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #0f0f0f;
        color: #e0e0e0;
    }

    .feature-card {
        background: #f8f5f5;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="number"],
    textarea {
        background-color: #2a2a2a;
        border-color: #444;
        color: #e0e0e0;
    }

    input[type="text"]:focus,
    input[type="email"]:focus,
    input[type="tel"]:focus,
    input[type="number"]:focus,
    textarea:focus {
        background-color: #1a1a1a;
        box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.2);
    }

    .form-container {
        background: #1a1a1a;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }

    p {
        color: #b0b0b0;
    }

    .feature-card p {
        color: #a0a0a0;
    }
}