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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #c9d1d9; /* Light grey text */
    background-color: #0d1117; /* Dark background */
}

.container {
    width: 85%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 0;
}

.bg-darker {
    background-color: #010409;
}

/* Header */
header {
    background: #161b22;
    border-bottom: 1px solid #30363d;
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
}

header h1 {
    font-size: 1.8rem;
    color: #58a6ff; /* Tech blue */
    letter-spacing: 1px;
}

nav a {
    color: #c9d1d9;
    text-decoration: none;
    margin-left: 20px;
    font-weight: bold;
    transition: color 0.3s;
}

nav a:hover {
    color: #58a6ff;
}

/* Hero / Latest Book */
#hero {
    padding: 80px 0;
    background: linear-gradient(180deg, #0d1117 0%, #161b22 100%);
}

.hero-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 50px;
    align-items: center;
}

.book-cover {
    flex: 1;
    min-width: 280px;
    max-width: 350px;
}

.placeholder-cover {
    width: 100%;
    height: 500px;
    background: #21262d;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid #30363d;
    border-radius: 8px;
    color: #8b949e;
    text-align: center;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.placeholder-cover h3 {
    color: #58a6ff;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.hero-text {
    flex: 2;
    min-width: 300px;
}

.hero-text h2 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    color: #ffffff;
}

.tagline {
    font-size: 1.3rem;
    font-style: italic;
    color: #3fb950; /* Terminal green */
    margin-bottom: 25px;
}

.description {
    margin-bottom: 35px;
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    background: #238636; /* Success green */
    color: #fff;
    padding: 12px 28px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
    border: 1px solid rgba(240, 246, 252, 0.1);
    cursor: pointer;
    transition: background 0.3s ease;
    margin-right: 15px;
    margin-bottom: 10px;
}

.btn:hover {
    background: #2ea043;
}

.btn-outline {
    background: transparent;
    border: 1px solid #8b949e;
    color: #c9d1d9;
}

.btn-outline:hover {
    background: #30363d;
    border-color: #c9d1d9;
}

/* Sections General */
section {
    padding: 70px 0;
}

section h2 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    color: #ffffff;
    border-bottom: 2px solid #30363d;
    padding-bottom: 10px;
    display: inline-block;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 600px;
    margin-top: 25px;
}

.contact-form input, 
.contact-form textarea {
    width: 100%;
    padding: 14px;
    background: #0d1117;
    border: 1px solid #30363d;
    color: #c9d1d9;
    border-radius: 6px;
    font-size: 1rem;
}

.contact-form input:focus, 
.contact-form textarea:focus {
    outline: none;
    border-color: #58a6ff;
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}

/* Footer */
footer {
    background: #010409;
    border-top: 1px solid #30363d;
    color: #8b949e;
    text-align: center;
    padding: 30px 0;
    font-size: 0.9rem;
}