/* ==========================
   Page Setup & Typography
========================== */
html {
    scroll-behavior: smooth;
}

button,
input {
    font-family: inherit;
}

.tool-page-head {
    margin-bottom: 28px;
}

.section-kicker {
    display: inline-block;
    padding: 8px 14px;
    margin-bottom: 14px;
    background: var(--card);
    border: var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    font-weight: 900;
}

.tool-page-head h1 {
    margin: 0 0 12px;
    font-size: clamp(2.2rem, 4vw, 3.6rem);
    line-height: 1;
}

.tool-page-head p {
    margin: 0;
    max-width: 760px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* ==========================
   Layout
========================== */
.tool-shell {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 24px;
    align-items: start;
}

.tool-main-card,
.tool-preview-card {
    padding: 28px;
    background: var(--card);
    border: var(--border);
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.tool-main-card h2 {
    margin: 0 0 10px;
    font-size: 2rem;
}

.tool-subtext {
    margin: 0 0 22px;
    line-height: 1.7;
}

/* ==========================
   Form Labels & Values
========================== */
.field-label,
.color-label {
    display: flex;
    align-items: center;
    margin: 0 0 10px;
    font-weight: 800;
}

.field-label {
    justify-content: space-between;
}

.color-label {
    gap: 8px;
}

.rangeval {
    color: var(--blue);
    font-weight: 900;
}

/* ==========================
   Inputs (Text, File, Color)
========================== */
input[type="text"],
input[type="file"],
input[type="color"] {
    width: 100%;
    margin-bottom: 18px;
    background: #fff;
    border: var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    color: var(--text);
    font-size: 16px;
    transition: transform 0.1s, box-shadow 0.1s;
}

input[type="text"],
input[type="file"] {
    padding: 16px;
}

input[type="color"] {
    width: 70px;
    height: 60px;
    padding: 6px;
    cursor: pointer;
}

/* Input Focus States */
input[type="text"]:focus,
input[type="file"]:focus,
input[type="color"]:focus {
    outline: none;
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 #111;
}

/* File Button Specifics */
input[type="file"] {
    cursor: pointer;
}

input[type="file"]::file-selector-button {
    padding: 10px 16px;
    margin-right: 12px;
    background: var(--yellow);
    color: var(--text);
    border: var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    font-weight: 800;
    cursor: pointer;
}

/* Range Slider */
input[type="range"] {
    width: 100%;
    margin-bottom: 22px;
    cursor: pointer;
}

/* ==========================
   Action Button
========================== */
#downloadBtn {
    width: 100%;
    min-height: 58px;
    padding: 16px;
    background: var(--green);
    color: #111;
    border: var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    font-size: 16px;
    font-weight: 900;
    cursor: pointer;
    transition: 0.15s;
}

#downloadBtn:hover:not(:disabled) {
    transform: translate(4px, 4px);
}

#downloadBtn:active:not(:disabled) {
    transform: translate(6px, 6px);
}

#downloadBtn:disabled {
    opacity: .55;
    cursor: not-allowed;
    transform: none;
}

/* ==========================
   Status Message
========================== */
.status {
    margin-top: 20px;
    min-height: 24px;
    padding: 16px;
    background: #dff4ff;
    border: var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-sm);
    line-height: 1.7;
    word-break: break-word;
}

/* Hides the blue box when there's no message */
.status:empty {
    display: none;
}

/* ==========================
   Preview Canvas
========================== */
.preview-card-top h3 {
    margin: 0 0 8px;
    font-size: 1.5rem;
}

.preview-card-top p {
    margin: 0 0 18px;
    line-height: 1.7;
}

.canvas-wrap {
    padding: 18px;
    margin-bottom: 18px;
    background: var(--bg-alt);
    border: var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

#canvasHolder {
    display: flex;
    justify-content: center;
    align-items: center;
}

#pdfCanvas {
    display: block;
    width: 100%;
    min-height: 220px;
    height: auto;
    background: #fff;
    border: var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-sm);
}

/* ==========================
   Side Note (How it works)
========================== */
.side-note {
    padding: 18px;
    background: var(--yellow);
    border: var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.side-note h4 {
    margin: 0 0 12px;
    font-size: 1.1rem;
}

.side-note ul {
    margin: 0;
    padding-left: 18px;
    font-weight: 700;
    line-height: 1.8;
}

/* ==========================
   Responsive
========================== */
@media (max-width: 1100px) {
    .tool-shell {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .tool-main-card,
    .tool-preview-card {
        padding: 20px;
    }
    
    .tool-page-head h1 {
        font-size: 2.3rem;
    }
}