/* Color Palette: White, Blue, Red (Primary), Black (Text) */
:root {
    --primary-red: #E63946;
    --primary-red-hover: #D62828;
    --secondary-blue: #457B9D;
    --secondary-blue-hover: #1D3557;
    --background-white: #FFFFFF;
    --background-light: #F1FAEE;
    --text-black: #1A1A1D;
    --text-muted: #555555;
    --border-color: #E0E0E0;
    --shadow-sm: 0 4px 6px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 15px rgba(0,0,0,0.1);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--background-white);
    color: var(--text-black);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.text-center {
    text-align: center;
}

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

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 700;
}

p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

a {
    text-decoration: none;
    color: var(--secondary-blue);
    transition: color var(--transition-speed);
}

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

/* Navbar */
.navbar {
    background-color: var(--background-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-black);
}

.logo span {
    color: var(--primary-red);
}

.nav-links ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 600;
    color: var(--text-black);
    padding: 0.5rem 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-red);
    transition: width var(--transition-speed);
}

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

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger, .hamburger::before, .hamburger::after {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-black);
    position: relative;
    transition: all 0.2s ease-in-out;
}

.hamburger::before, .hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before { top: -8px; }
.hamburger::after { top: 8px; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    text-align: center;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-red-hover);
    color: var(--background-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-blue-hover);
    color: var(--background-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Pages Content */
.hero {
    min-height: calc(100vh - 140px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, var(--background-light) 0%, var(--background-white) 100%);
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    color: var(--secondary-blue-hover);
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.page-content {
    padding: 4rem 0;
}

/* About Grid */
.about-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    background: var(--background-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-card {
    background-color: var(--background-white);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border-bottom: 4px solid var(--secondary-blue);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--primary-red);
}

.skill-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.sysadmin-icon { background-color: var(--primary-red); border-radius: 50%; }
.linux-icon { background-color: var(--text-black); border-radius: 50%; }
.server-icon { background-color: var(--secondary-blue); border-radius: 50%; }
.office-icon { background-color: #D83B01; border-radius: 50%; }

/* Contact Form */
.contact-form-container {
    max-width: 600px;
    margin: 2rem auto 0;
    background: var(--background-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-red);
}

/* Footer */
.footer {
    background-color: var(--text-black);
    color: var(--background-white);
    padding: 1.5rem 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    color: #AAAAAA;
    margin: 0;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--background-white);
        box-shadow: var(--shadow-md);
        padding: 1rem 0;
    }

    .nav-links.nav-open {
        display: block;
    }
    
    .nav-links ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}