/* GSE Engenharia - Base Styles */

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

/* Color Variables */
:root {
    --primary-blue: #003366;
    --primary-yellow: #FFC90E;
    --light-gray: #F0F0F0;
    --white: #FFFFFF;
    --dark-gray: #333333;
    --medium-gray: #666666;
    --light-blue: #E6F3FF;
}

/* Typography */
body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto Slab', serif;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
    line-height: 1.2;
}

h2 {
    font-size: 2.5rem;
    line-height: 1.3;
}

h3 {
    font-size: 2rem;
    line-height: 1.4;
}

h4 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: var(--medium-gray);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 14px;
    letter-spacing: 1px;
}

.btn-primary {
    background-color: var(--primary-yellow);
    color: var(--primary-blue);
    border-color: var(--primary-yellow);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-yellow);
    border-color: var(--primary-yellow);
}

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

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

/* Load Screen */
.load-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-blue);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    text-align: center;
    color: var(--white);
}

.loader-text {
    font-family: 'Roboto Slab', serif;
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-yellow);
    margin-bottom: 10px;
    animation: pulse 2s infinite;
}

.loader-subtext {
    font-size: 1.2rem;
    letter-spacing: 3px;
    color: var(--white);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Navigation */
.fixed-nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    height: 60px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-yellow);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-yellow);
    transition: width 0.3s ease;
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-blue);
    transition: all 0.3s ease;
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 20px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: var(--primary-yellow);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--medium-gray);
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Body offset for fixed navigation */
body {
    padding-top: 80px;
}