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

.wrap {
    max-width: 1000px;
    margin: 0 auto;
}

button, input, select {
    font-family: inherit;
}

.hidden {
    display: none !important;
}

/* --- Page Heading --- */
.tool-page-head {
    margin-bottom: 28px;
    text-align: left;
    max-width: 760px;
}

.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;
    font-size: 1.05rem;
    line-height: 1.7;
}

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

/* --- Tool Layout --- */
.tool-shell {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 24px;
    align-items: start;
}

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

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

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

/* --- Form Elements --- */
.field-label {
    display: block;
    font-weight: 800;
    margin: 0 0 10px;
}

input, select {
    width: 100%;
    padding: 16px;
    margin-bottom: 18px;
    border: var(--border);
    border-radius: 16px;
    background: white;
    color: var(--text);
    font-size: 16px;
    box-shadow: var(--shadow-sm);
    box-sizing: border-box;
}

input:focus, select:focus {
    outline: none;
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 #111;
}

/* File Input */
input[type="file"] {
    cursor: pointer;
    padding: 10px;
}

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

/* Password Box */
.password-box {
    position: relative;
}

.password-box input {
    padding-right: 50px;
}

.eyebutton {
    position: absolute;
    right: 12px;
    top: 40%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
}

/* --- Buttons --- */
.primary-btn, #lockBtn {
    width: 100%;
    min-height: 58px;
    padding: 16px;
    border: var(--border);
    border-radius: 16px;
    background: var(--yellow);
    color: #111;
    font-size: 16px;
    font-weight: 900;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: .15s;
    margin-bottom: 12px;
}

.primary-btn:hover, #lockBtn:hover {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0 #111;
}

.primary-btn:active, #lockBtn:active {
    transform: translate(6px, 6px);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: var(--shadow-sm) !important;
}

/* --- Preview Section --- */
.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 {
    background: var(--bg-alt);
    border: var(--border);
    box-shadow: var(--shadow-sm);
    border-radius: 20px;
    padding: 18px;
    margin-bottom: 18px;
    display: flex;
    justify-content: center;
    overflow: hidden;
}

canvas, #pdfCanvas {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
}

#previewPlaceholder {
    text-align: center;
    padding: 100px 20px;
    font-weight: 700;
    opacity: 0.6;
}

/* --- Utilities & Notifications --- */
.side-note {
    background: var(--yellow);
    border: var(--border);
    box-shadow: var(--shadow-sm);
    border-radius: 20px;
    padding: 18px;
}

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

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

.error {
    margin-top: 16px;
    padding: 14px;
    border: var(--border);
    border-radius: 16px;
    background: #ffb4b4;
    color: #111;
    font-weight: 800;
}

.hint-text {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-top: 4px;
    margin-bottom: 24px;
}

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