/* 
    DESIGN SYSTEM
    Professional, Minimal, Production-Ready
*/

:root {
    --header-height: 5rem;

    /* Colors - Professional Palette */
    --accent-color: hsl(217, 100%, 50%); /* Royal Blue */
    --accent-color-hover: hsl(217, 100%, 40%);
    
    --bg-color: hsl(220, 30%, 4%);
    --bg-color-alt: hsl(220, 20%, 8%);
    --bg-color-soft: hsl(220, 15%, 12%);
    
    --title-color: hsl(0, 0%, 100%);
    --text-color: hsl(220, 10%, 75%);
    --text-color-light: hsl(220, 10%, 55%);
    --border-color: hsl(220, 15%, 15%);
    
    /* Typography */
    --body-font: 'Outfit', sans-serif;
    
    --h1-size: 2.25rem;
    --h2-size: 2rem;
    --h3-size: 1.25rem;
    --normal-size: 1rem;
    --small-size: 0.875rem;
    --smaller-size: 0.813rem;

    /* Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semi-bold: 600;
    --font-bold: 700;

    /* Spacing & Transitions */
    --section-padding: 6rem;
    --container-width: 1140px;
    --transition-subtle: 0.2s ease;
    
    --z-fixed: 1000;

    /* Border Radius - "Dome Edges" - Increased for more curved look */
    --border-radius-m: 24px;
    --border-radius-s: 16px;
    --border-radius-pill: 50px;
}

@media screen and (min-width: 1024px) {
    :root {
        --h1-size: 4rem;
        --h2-size: 2.75rem;
        --h3-size: 1.5rem;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--body-font);
    font-size: var(--normal-size);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-subtle);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button, input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* REUSABLE CLASSES */
.container {
    max-width: var(--container-width);
    margin-inline: 1.5rem;
}

@media screen and (min-width: 1200px) {
    .container {
        margin-inline: auto;
    }
}

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

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

.section-padded {
    padding-block: 8rem;
}

.section-heading {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 5rem;
}

.section-title {
    font-size: var(--h2-size);
    font-weight: var(--font-bold);
    color: var(--title-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.25rem;
}

.section-title span {
    color: var(--accent-color);
}

.section-subtitle {
    font-size: var(--small-size);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-color-light);
    font-weight: var(--font-medium);
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius-pill);
    font-weight: var(--font-semi-bold);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: var(--smaller-size);
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition-subtle);
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 50, 255, 0.1);
}

.btn-primary:hover {
    background-color: var(--accent-color-hover);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 50, 255, 0.25);
}

.btn-secondary {
    background-color: var(--bg-color-soft);
    color: var(--title-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    transform: translateY(-3px) scale(1.02);
}

.btn-outline {
    border: 1px solid var(--border-color);
    color: var(--title-color);
}

.btn-outline:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background-color: rgba(0, 50, 255, 0.05);
    transform: translateY(-3px) scale(1.02);
}

.btn-block {
    width: 100%;
}

/* HEADER & NAVIGATION */
.header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: transparent;
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
}

.nav {
    display: grid;
    grid-template-columns: 200px 1fr 200px;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 1.25rem;
    font-weight: var(--font-bold);
    color: var(--title-color);
    letter-spacing: 1px;
}

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

.nav-menu {
    justify-self: center;
}

.nav-list {
    display: flex;
    column-gap: 3.5rem;
}

.nav-link {
    color: var(--text-color);
    text-transform: uppercase;
    font-weight: var(--font-medium);
    font-size: var(--smaller-size);
    letter-spacing: 1px;
}

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

.nav-actions {
    justify-self: end;
}

.btn-nav {
    padding: 0.6rem 1.25rem;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    font-size: var(--smaller-size);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    border-radius: 4px;
}

.btn-nav:hover {
    background-color: var(--accent-color);
    color: #fff;
}

/* Mobile: Hide Navigation Menu */
@media screen and (max-width: 767px) {
    .nav {
        grid-template-columns: 1fr auto;
    }
    .nav-menu {
        display: none;
    }
}

/* HERO */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(to right, rgba(6, 7, 10, 0.85), rgba(6, 7, 10, 0.6)), url('hero.png') center/cover no-repeat;
    position: relative;
}

.hero-title {
    font-size: var(--h1-size);
    font-weight: var(--font-bold);
    color: var(--title-color);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    max-width: 800px;
}

.hero-title span {
    color: var(--accent-color);
}

.hero-description {
    max-width: 540px;
    margin-bottom: 4rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

/* PRICING */
.pricing-grid {
    display: grid;
    gap: 2.5rem;
}

.pricing-card {
    background-color: var(--bg-color);
    padding: 4rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-m);
    position: relative;
    transition: var(--transition-subtle);
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    background-color: var(--bg-color-alt);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
    border: 1px solid var(--accent-color);
}

.pricing-badge {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: var(--smaller-size);
    color: var(--accent-color);
    font-weight: var(--font-bold);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pricing-tier {
    font-size: var(--h3-size);
    color: var(--title-color);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.pricing-amount {
    font-size: 3.5rem;
    font-weight: var(--font-bold);
    color: var(--title-color);
    margin-bottom: 3.5rem;
}

.pricing-amount span {
    font-size: var(--normal-size);
    color: var(--text-color-light);
    font-weight: var(--font-normal);
}

.pricing-features {
    margin-bottom: 4rem;
    display: flex;
    flex-direction: column;
    row-gap: 1.5rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    column-gap: 1rem;
    font-size: var(--small-size);
}

.pricing-features i {
    color: var(--accent-color);
    font-size: 1rem;
}

/* CONTACT */
.contact-grid {
    display: grid;
    gap: 6rem;
}

.contact-description {
    margin-bottom: 4rem;
}

.contact-list {
    display: grid;
    row-gap: 3.5rem;
}

.contact-item {
    display: flex;
    column-gap: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.contact-item h4 {
    color: var(--title-color);
    text-transform: uppercase;
    font-size: var(--small-size);
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
}

.contact-form-container {
    background-color: var(--bg-color-alt);
    padding: 4rem 3rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-m);
}

.form-row {
    display: grid;
    gap: 2rem;
}

.form-group {
    margin-bottom: 2.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 1rem;
    font-size: var(--smaller-size);
    text-transform: uppercase;
    font-weight: var(--font-semi-bold);
    letter-spacing: 1px;
}

.form-group input, .form-group textarea {
    width: 100%;
    background-color: var(--bg-color-soft);
    border: 1.5px solid var(--border-color);
    border-radius: var(--border-radius-s);
    padding: 1.25rem 1.5rem;
    color: var(--title-color);
    outline: none;
    transition: var(--transition-subtle);
}

.form-group textarea {
    height: 180px;
    resize: none;
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--accent-color);
}

.form-feedback {
    margin-top: 2rem;
    text-align: center;
    font-size: var(--small-size);
}

/* FOOTER */
.footer {
    padding-block: 6rem 4rem;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: grid;
    gap: 5rem;
    margin-bottom: 5rem;
}

.footer-brand p {
    margin-top: 2rem;
    color: var(--text-color-light);
    max-width: 300px;
}

.footer h4 {
    color: var(--title-color);
    text-transform: uppercase;
    font-size: var(--small-size);
    margin-bottom: 2rem;
    letter-spacing: 1px;
}

.footer-links ul {
    display: grid;
    row-gap: 1.25rem;
}

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

.social-icons {
    display: flex;
    column-gap: 2rem;
}

.social-icons i {
    font-size: 1.25rem;
}

.footer-bottom {
    padding-top: 4rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: var(--smaller-size);
    color: var(--text-color-light);
}

/* MEDIA QUERIES */
@media screen and (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-card:last-child {
        grid-column: span 2;
        max-width: 500px;
        justify-self: center;
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-card:last-child {
        grid-column: span 1;
        max-width: none;
    }
    
    .contact-grid {
        grid-template-columns: 1fr 1.3fr;
        align-items: center;
    }
    
    .footer-container {
        grid-template-columns: repeat(3, 1fr);
    }
}