/* ========================================
   PDF to Image Converter - Digital Gene Style
   ======================================== */

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

:root {
    --header-bg: #374142;
    --gradient-start: #45ffe8;
    --gradient-mid: #6f62ec;
    --gradient-end: #f438a0;
    --text-primary: #3f4a4f;
    --text-white: #ffffff;
    --bg-white: #ffffff;
    --accent-blue: #3498db;
    --accent-blue-dark: #20638f;
    --accent-green: #28a745;
    --accent-green-dark: #1c7430;
    --accent-purple: #7478c2;
    --accent-cyan: #45d4c8;
    --accent-pink: #f438a0;
    --border-radius: 6px;
    --container-width: 900px;
    --font-family: メイリオ, Meiryo, "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", Arial, sans-serif;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


/* ========================================
   Title Banner
   ======================================== */
.title-banner {
    background:linear-gradient(135deg, #0feeb4 0%, #0372d8 100%);
    padding: 60px 20px;
    text-align: center;
}

.title-banner h1 {
    color: var(--text-white);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.title-banner p {
    color: var(--text-white);
    font-size: 16px;
    opacity: 0.9;
}

/* ========================================
   Main Container
   ======================================== */
main {
    flex: 1;
}

.converter-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 40px 20px;
}

/* ========================================
   Upload Area
   ======================================== */
.upload-area {
    border: 3px dashed #ccc;
    border-radius: 12px;
    padding: 50px 20px;
    text-align: center;
    transition: all 0.3s ease;
    background-color: #fafafa;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-blue);
    background-color: #f0f7ff;
}

.upload-area.has-file {
    border-color: var(--accent-blue);
    border-style: solid;
    background-color: #f0f7ff;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.upload-icon img {
    width: 96px;
    height: 96px;
    filter: brightness(1);
}

.upload-text {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-subtext {
    font-size: 14px;
    color: #888;
    margin-bottom: 16px;
}

.file-button {
    display: inline-block;
    background-color: var(--accent-blue);
    color: var(--text-white);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.2s;
}

.file-button:hover {
    background-color: var(--accent-blue-dark);
}

.file-name {
    margin-top: 16px;
    font-size: 14px;
    color: var(--accent-purple);
    font-weight: bold;
}

.privacy-notice {
    margin-top: 20px;
    font-size: 13px;
    color: #666;
    text-align: center;
    font-style: italic;
    line-height: 1.6;
}

/* ========================================
   Settings Panel
   ======================================== */
.settings-panel {
    margin-top: 30px;
    padding: 30px;
    background-color: #f8f8f8;
    border-radius: 12px;
}

.settings-panel h2 {
    font-size: 18px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.setting-group {
    margin-bottom: 24px;
}

.setting-group:last-child {
    margin-bottom: 0;
}

.setting-group>label {
    display: block;
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 12px;
    color: var(--text-primary);
}

/* Button Group */
.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.button-group button {
    flex: 1;
    min-width: 100px;
    padding: 14px 20px;
    border: none;
    border-radius: var(--border-radius);
    background-color: #e0e0e0;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.button-group button:hover {
    background-color: #d0d0d0;
}

.button-group button.active {
    background-color: var(--accent-blue);
    color: var(--text-white);
}

/* Range Slider */
input[type="range"] {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--accent-blue-dark), var(--accent-blue));
    border-radius: 4px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background-color: var(--text-white);
    border: 3px solid var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background-color: var(--text-white);
    border: 3px solid var(--accent-blue);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Convert Button
   ======================================== */
.convert-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    margin-top: 30px;
    padding: 18px 30px;
    border: none;
    border-radius: 20px;
    background-color: var(--accent-green);
    color: var(--text-white);
    font-size: 18px;
    font-weight: bold;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.convert-button:hover:not(:disabled) {
    background-color: var(--accent-green-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

.convert-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 画像アイコン用 */
.btn-icon-img {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    vertical-align: middle;
}

/* ========================================
   Convert Buttons Container
   ======================================== */
.convert-buttons {
    display: flex;
    gap: 16px;
    margin-top: 30px;
}

.convert-buttons .convert-button {
    flex: 1;
    margin-top: 0;
}

.convert-button-secondary {
    background-color: var(--accent-green);
}

.convert-button-secondary:hover:not(:disabled) {
    background-color: var(--accent-green-dark);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.4);
}

/* ========================================
   Page Selection Area
   ======================================== */
.page-selection-area {
    margin-top: 30px;
    padding: 24px;
    background-color: #f8f8f8;
    border-radius: 12px;
    border: 2px solid var(--accent-green);
}

.page-selection-title {
    font-size: 16px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.page-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.page-btn {
    min-width: 48px;
    padding: 10px 14px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--accent-green);
    color: var(--text-white);
    font-size: 14px;
    font-weight: bold;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.page-btn:hover {
    background-color: var(--accent-green-dark);
    transform: translateY(-1px);
}

.page-btn.downloaded {
    background-color: var(--accent-green-dark);
}

/* ========================================
   Progress Area
   ======================================== */
.progress-area {
    margin-top: 30px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background-color: #e0e0e0;
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-green-dark), var(--accent-green));
    border-radius: 6px;
    transition: width 0.3s ease;
}

.progress-text {
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-primary);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 600px) {
    .nav-links {
        gap: 15px;
    }

    .nav-links a {
        font-size: 12px;
    }

    .title-banner {
        padding: 40px 20px;
    }

    .title-banner h1 {
        font-size: 24px;
    }

    .button-group {
        flex-direction: column;
    }

    .button-group button {
        min-width: auto;
    }

    .convert-buttons {
        flex-direction: column;
    }
}

/* ========================================
   License Dialog
   ======================================== */
.license-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-y: auto;
}

.license-overlay.active {
    display: flex;
}

.license-dialog {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 40px;
    max-width: 700px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.license-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: #666;
    line-height: 1;
    padding: 0;
    transition: color 0.2s;
}

.license-close:hover {
    color: var(--accent-pink);
}

.license-dialog h2 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 28px;
    border-bottom: 3px solid var(--accent-blue);
    padding-bottom: 15px;
}

.license-intro {
    margin-bottom: 25px;
    color: #555;
    line-height: 1.6;
}

.license-dialog h3 {
    color: #34495e;
    margin-top: 25px;
    margin-bottom: 12px;
    font-size: 18px;
}

.license-block {
    background: #f9f9f9;
    border-left: 4px solid var(--accent-blue);
    padding: 15px 20px;
    margin: 0 0 15px 0;
    border-radius: 0 8px 8px 0;
}

.license-block p {
    margin-bottom: 8px;
    line-height: 1.7;
    font-size: 14px;
}

.license-block p:last-child {
    margin-bottom: 0;
}

.license-block a {
    color: var(--accent-blue);
    text-decoration: none;
}

.license-block a:hover {
    text-decoration: underline;
}

.license-summary {
    margin: 15px 0 20px 25px;
}

.license-summary li {
    margin-bottom: 8px;
    line-height: 1.7;
    font-size: 14px;
}

.license-note {
    color: #666;
    font-size: 13px;
    font-style: italic;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

/* Footer License Link */
.license-info-area {
    text-align: center;
    padding: 10px 20px;
    margin-top: 20px;
}

.license-info-area a {
    color: #888;
    text-decoration: none;
    font-size: 11px;
    font-weight: normal;
    transition: color 0.2s;
}

.license-info-area a:hover {
    color: #666;
    text-decoration: underline;
}

@media (max-width: 600px) {
    .license-dialog {
        padding: 25px 20px;
    }

    .license-dialog h2 {
        font-size: 22px;
        padding-right: 30px;
    }

    .license-dialog h3 {
        font-size: 16px;
    }

    .license-block {
        padding: 12px 15px;
    }
}