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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #2c2c2c;
    color: #fff;
}

/* ===== HEADER / NAV ===== */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 100px;
    min-height: 100px;
    background: #fff;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo img {
    width: 80px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav a {
    text-decoration: none;
    color: #555;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav a:hover {
    color: #333;
}

.nav .dropdown::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid #777;
}

.btn-buy {
    background: #8bc34a;
    color: #fff !important;
    padding: 10px 24px;
    border-radius: 3px;
    font-size: 12px !important;
}

/* ===== HERO SECTION ===== */
.hero-section {
    min-height: 80vh;
    background-color: #2d2b2c;
    background-image: url("../images/home-hero-bg.png");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    transition: background .3s, border .3s, border-radius .3s, box-shadow .3s;
    padding: 80px 0;
    position: relative;

    align-items: center;
    align-content: center;
}

.hero-col-content {
    display: flex;
    position: relative;
}

.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 28px;
    color: #333;
    letter-spacing: -0.5px;
}

.hero-content p {
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    margin-bottom: 40px;
    max-width: 420px;
}

.hero-buttons {
    display: flex;
    align-items: center;
    gap: 18px;
}

.btn-view-demo {
    background-color: #cddc39;
    color: #333;
    padding: 14px 32px;
    border: none;
    border-radius: 3px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color 0.2s;
}

.btn-view-demo:hover {
    background-color: #c0ca33;
}

.or-text {
    color: #888;
    font-size: 14px;
    font-style: italic;
}

.btn-try-pdf {
    background-color: #0983FA;
    color: #ffffff;
    padding: 14px 28px;
    border: none;
    border-radius: 3px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background-color 0.2s;
}

.btn-try-pdf:hover {
    background-color: #0983FA;
}

.btn-try-pdf svg {
    width: 14px;
    height: 14px;
}

.hero-image {
    flex: 0 0 55%;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 25px 50px rgba(0,0,0,0.25));
}

/* ===== CHOOSE DEMO SECTION ===== */
.choose-demo-section {
    background-color: #2c2c2c;
    padding: 60px 80px 20px;
    text-align: center;
}

.choose-demo-section h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 50px;
    color: #fff;
}

.bookshelf-wrapper {
    position: relative;
    display: inline-block;
}

.arrow-curved {
    position: absolute;
    top: -45px;
    left: 50%;
    transform: translateX(-20px);
    width: 70px;
    height: 55px;
}

.bookshelf {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 0;
    position: relative;
    padding-bottom: 12px;
    top: 20px;
}

.bookshelf::after {
    content: '';
    position: absolute;
    top: 130px;
    bottom: 0;
    width: 820px;
    height: 50%;
    background-image: url(../images/shelf_wood.webp);
    border-radius: 0 0 3px 3px;
}

.book-thumb {
    width: 100px;
    height: 140px;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: 3px 3px 10px rgba(0,0,0,0.4);
    transition: transform 0.25s ease;
    cursor: pointer;
    position: relative;
    z-index: 1;
    margin: 0 2px;
}

.book-thumb:hover {
    transform: translateY(-10px);
}

/* ===== TRY PDF SECTION ===== */
.try-pdf-section {
    background-color: #2c2c2c;
    padding: 80px 80px 100px;
    text-align: center;
}

.try-pdf-section h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #fff;
}

.try-pdf-section .subtitle {
    font-size: 15px;
    color: #aaa;
    margin-bottom: 40px;
}

.upload-area {
    border: 2px dashed #555;
    border-radius: 12px;
    padding: 70px 50px;
    max-width: 620px;
    margin: 0 auto 12px;
    background: transparent;
    transition: border-color 0.2s;
}

.upload-area:hover {
    border-color: #777;
}

.upload-btn {
    background-color: #fff;
    color: #333;
    padding: 14px 32px;
    border: none;
    border-radius: 3px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.upload-btn:hover {
    background-color: #f5f5f5;
}

.upload-btn svg {
    width: 14px;
    height: 14px;
}

.upload-note {
    font-size: 13px;
    color: #888;
}

.site-footer {
    background-color: #151515;
    color: #ccc;;
    /* margin-top: 40px; */
}

.site-footer small {
    display: inline-block;
    font-size: 0.95rem;
}