/* |==========================================================================
| GLOBAL STYLES & VARIABLES
|==========================================================================
*/
:root {
    /* Color Palette (Deep Crimson & Cyan Accent) */
    --color-primary-dark: #5e0808;      /* Deep Crimson (Marco's primary color) */
    --color-primary-light: #870d0d;     /* Lighter Crimson */
    --color-secondary-accent: #0f172a;  /* Near-Black/Dark Navy for contrast */
    --color-tertiary-accent: #00bcd4;   /* Vibrant Cyan (Highlight/Hover) */
    --color-text-dark: #222;            /* Main Body Text */
    --color-white: #ffffff;
    --color-bg-light: #f5f7fa;          /* Light Gray Background */
    --color-bg-dark: #e0e0e0;           /* Slightly darker gray for sections */

    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-heading: 'Montserrat', sans-serif;

    /* Spacing & Transitions */
    --padding-section: 6rem 4%;
    --transition-speed: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

section {
    padding: var(--padding-section);
}

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

.section-heading {
    font-family: var(--font-heading);
    text-align: center;
    font-size: 2.5rem;
    color: var(--color-primary-dark);
    margin-bottom: 3rem;
    font-weight: 800;
}

.section-heading i {
    color: var(--color-tertiary-accent);
    margin-right: 0.5rem;
}

/* |==========================================================================
| UTILITY CLASSES (Buttons, Links)
|==========================================================================
*/

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-tertiary-accent);
    color: var(--color-secondary-accent);
    border-color: var(--color-tertiary-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

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

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

.btn-link {
    color: var(--color-primary-dark);
    text-decoration: underline;
    font-weight: 600;
    transition: color var(--transition-speed);
}

.btn-link:hover {
    color: var(--color-tertiary-accent);
}

/* |==========================================================================
| HEADER & NAVBAR
|==========================================================================
*/
header {
    background: var(--color-secondary-accent);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    max-width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 4%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-white);
}

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

.main-nav {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--color-white);
    font-weight: 600;
    position: relative;
    transition: color var(--transition-speed);
}

.main-nav a:hover {
    color: var(--color-tertiary-accent);
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    display: block;
    margin-top: 5px;
    right: 0;
    background: var(--color-tertiary-accent);
    transition: width var(--transition-speed) ease;
}

.main-nav a:hover::after {
    width: 100%;
    left: 0;
    background: var(--color-tertiary-accent);
}


/* |==========================================================================
| HERO SECTION
|==========================================================================
*/
.hero-section {
    background: linear-gradient(135deg, var(--color-secondary-accent) 0%, #1e293b 100%);
    color: var(--color-white);
    text-align: center;
    padding: 8rem 4%;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 5px solid var(--color-tertiary-accent);
}

.hero-content {
    max-width: 900px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: #b3c7d6;
    margin-bottom: 3rem;
    line-height: 1.4;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

/* |==========================================================================
| ABOUT SECTION
|==========================================================================
*/
.about-grid {
    max-width: 1000px;
    margin: auto;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.profile-image img {
    width: 100%;
    max-width: 250px;
    display: block;
    margin: auto;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border: 3px solid var(--color-primary-dark);
}

/* |==========================================================================
| SKILLS SECTION
|==========================================================================
*/
.skills-grid {
    max-width: 1000px;
    margin: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    text-align: center;
}

.skill-category {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed);
    border-top: 5px solid var(--color-primary-dark);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
    font-size: 1.4rem;
    color: var(--color-secondary-accent);
    margin-bottom: 1rem;
}

.skill-category h3 i {
    color: var(--color-tertiary-accent);
}

.skill-list {
    list-style: none;
    text-align: left;
}

.skill-list li {
    padding: 0.4rem 0;
    border-bottom: 1px dashed var(--color-bg-dark);
    font-size: 0.95rem;
}

.skill-list li:last-child {
    border-bottom: none;
}

/* |==========================================================================
| PROJECTS SECTION
|==========================================================================
*/
.section-tagline {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.2rem;
    color: #666;
}

.projects-grid {
    max-width: 1200px;
    margin: auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-speed);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    border-left: 5px solid var(--color-primary-dark);
}

.project-card:hover {
    transform: translateY(-8px);
    border-left-color: var(--color-tertiary-accent);
}

.project-card h3 {
    font-family: var(--font-heading);
    color: var(--color-secondary-accent);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.project-card p {
    color: #444;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.icon-header i {
    font-size: 2rem;
    color: var(--color-tertiary-accent);
    margin-bottom: 1rem;
}


/* |==========================================================================
| CONTACT SECTION
|==========================================================================
*/
.contact-content {
    max-width: 700px;
    margin: auto;
    text-align: center;
}

.contact-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-info {
    margin: 2rem 0;
    text-align: left;
    display: inline-block;
}

.contact-info p {
    font-size: 1.05rem;
    margin-bottom: 0.75rem;
}

.contact-info i {
    color: var(--color-primary-dark);
    width: 25px;
}

.contact-info a {
    color: var(--color-primary-dark);
    text-decoration: none;
}

.contact-info a:hover {
    color: var(--color-tertiary-accent);
}

/* |==========================================================================
| FOOTER
|==========================================================================
*/
footer {
    background: var(--color-secondary-accent);
    color: #999;
    text-align: center;
    padding: 2rem 4%;
    font-size: 0.9rem;
    border-top: 3px solid var(--color-primary-dark);
}

.social-links {
    margin-top: 0.5rem;
}

.social-links a {
    color: var(--color-white);
    font-size: 1.4rem;
    margin: 0 0.8rem;
    transition: color var(--transition-speed);
}

.social-links a:hover {
    color: var(--color-tertiary-accent);
}

/* |==========================================================================
| ANIMATIONS (Fade-In)
|==========================================================================
*/
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* |==========================================================================
| RESPONSIVENESS
|==========================================================================
*/

/* Tablet and Mobile adjustments */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3.5rem;
    }
    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .profile-image {
        order: -1; /* Move image above text on mobile */
    }
}

/* Smaller mobile screens */
@media (max-width: 576px) {
    .section-heading {
        font-size: 2rem;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .main-nav {
        gap: 1rem;
    }
    .navbar {
        flex-direction: column;
        padding: 1rem;
    }
    .main-nav {
        margin-top: 1rem;
        width: 100%;
        justify-content: space-around;
    }
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
    }
    .btn {
        width: 100%;
    }
}