/* 
Theme Name: E-Book Store Platinum
Version: 3.0 (Light & Professional)
Design: Clean Layout, High Contrast, Modern Typography
*/

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #2563eb;
    /* Royal Blue */
    --primary-dark: #1e40af;
    --accent: #f59e0b;
    /* Gold for actions/price */
    --bg-body: #f8fafc;
    /* Very Light Grey */
    --bg-card: #ffffff;
    --text-main: #0f172a;
    /* Deep Slate (Not Black) */
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --font-main: 'Plus Jakarta Sans', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-main);
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* HEADER - Clean White */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.search-bar {
    flex: 1;
    max-width: 500px;
    margin: 0 2rem;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: var(--bg-body);
    color: var(--text-main);
    font-family: var(--font-main);
    transition: 0.2s;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.header-actions a,
.header-actions div {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
    transition: 0.2s;
}

.header-actions a:hover {
    color: var(--primary);
}

/* HERO SECTION */
.hero {
    background: #ffffff;
    padding: 6rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2.5rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3);
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
}

/* PRODUCTS GRID */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 2rem;
    position: relative;
    padding-left: 0;
    border-left: none;
    margin-top: 3rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

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

.card-img {
    height: 300px;
    background: #f1f5f9;
    border-radius: 4px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #cbd5e1;
    font-weight: 600;
    background-size: cover;
    background-position: center;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0 0 0.5rem;
}

.card-author {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-footer {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.price {
    font-size: 1.2rem;
    color: var(--text-main);
    font-weight: 800;
}

.btn-add {
    background: white;
    border: 2px solid var(--border);
    color: var(--text-main);
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn-add:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: #eff6ff;
}

/* FOOTER */
.site-footer {
    background: #f1f5f9;
    padding: 4rem 0;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ADMIN LOGIN Specifics */
.admin-body {
    background: #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-card {
    background: white;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: 12px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h2 {
    color: var(--text-main);
    margin-bottom: 2rem;
}

.login-card input {
    background: var(--bg-body);
    border: 1px solid var(--border);
    color: var(--text-main);
}

.login-card input:focus {
    background: white;
    border-color: var(--primary);
}