/* General Body Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
}

.page-header {
    width: 100%;
    text-align: center;
    margin-bottom: 20px;
}

/* --- Mobile First Layout (default) --- */
.main-container {
    width: 100%;
    max-width: 600px;
}

.settings-panel {
    display: flex;
    flex-direction: column;
    background-color: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.preview-panel {
    order: -1; /* スマホ表示で設定項目より上に表示 */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-bottom: 20px;
}

/* --- Desktop Layout --- */
@media (min-width: 901px) {
    .main-container {
        max-width: 1200px;
    }

    .settings-panel {
        display: grid;
        grid-template-columns: 1fr minmax(320px, 420px);
        grid-template-areas: "body preview";
        gap: 30px;
    }

    .settings-body { grid-area: body; }

    .preview-panel {
        grid-area: preview;
        order: 0; /* PC表示では順序をリセット */
        background-color: #ffffff;
        padding: 30px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        position: sticky;
        top: 30px;
        align-self: start;
    }

    #url-settings > div {
        max-width: 550px;
    }
}

h1 {
    font-family: 'Righteous', cursive;
    font-weight: 400; /* Righteousは1ウェイトのみ */
    font-size: 3em; /* タイトルのサイズを大きくします */
    color: #1c1e21;
    margin-top: 0;
    margin-bottom: 10px;
    padding-bottom: 20px;
    border-bottom: 1px solid #dddfe2;
}

p {
    color: #606770; margin-bottom: 2px; /* この値を小さくすると間隔が詰まります */
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    margin-bottom: 20px;
    overflow-x: auto;
    white-space: nowrap;
    gap: 8px; /* ボタン間のスペースを追加 */
}

.tab-button {
    padding: 10px 20px;
    cursor: pointer;
    border: none;
    background-color: #e4e6eb;
    font-size: 16px;
    font-weight: 600;
    color: #3c4043;
    border-radius: 20px; /* 丸みを強くする */
    transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}

.tab-button:hover:not(.active) {
    background-color: #d8dadf;
}

.tab-button.active {
    color: #ffffff;
    background-color: #5856d6;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.hidden {
    display: none !important;
}

fieldset {
    border: 1px solid #dddfe2;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    margin-top: 0;
}

.setting-row {
    justify-content: center;
}

/* Form elements */
fieldset > div {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

label {
    margin-right: 10px;
    font-weight: 500;
    color: #4b4f56;
    min-width: 150px;
}

/* URL入力欄のラベル幅を調整 */
#url-settings label {
    min-width: auto;
    flex-shrink: 0; /* ラベルが縮まないように */
}

input[type="text"],
select {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccd0d5;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.2s;
}

input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: #5856d6;
    box-shadow: 0 0 0 2px rgba(88, 86, 214, 0.2);
}

input[type="color"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 36px;
    height: 36px;
    background-color: transparent;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border-radius: 50%;
    border: 1px solid #ddd;
}
input[type="color"]::-moz-color-swatch {
    border-radius: 50%;
    border: 1px solid #ddd;
}

input[type="file"] {
    border: 1px solid #ccd0d5;
    border-radius: 6px;
    padding: 8px;
}

input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
}

input[type="range"] {
    flex-grow: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    background: #ddd;
    border-radius: 5px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #5856d6;
    cursor: pointer;
    border-radius: 50%;
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #5856d6;
    cursor: pointer;
    border-radius: 50%;
    border: none;
}

#logo-size-value {
    margin-left: 15px;
    font-weight: bold;
    min-width: 40px;
}

hr {
    width: 100%;
    border: none;
    border-top: 1px solid #dddfe2;
    margin: 25px 0;
}

/* Buttons */
button {
    background-color: #5856d6;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    margin-top: 10px;
}

button:hover {
    background-color: #4c4ab8;
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    background-color: #a9a9a9;
    cursor: not-allowed;
}

.preview-panel button {
    width: 100%;
}

#download-button {
    background-color: #34c759;
}

#download-button:hover:not(:disabled) {
    background-color: #2ca34a;
}

/* QR Code container */
#qr-container {
    margin-bottom: 20px;
    padding: 20px;
    border: 1px solid #dddfe2;
    border-radius: 12px;
    background-color: #f7f7f7;
    width: 100%;
    max-width: 298px;
    aspect-ratio: 1 / 1;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
}

#qr-container img {
    max-width: 100%;
    border-radius: 8px;
}

.radio-options-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    width: 100%;
}

.radio-option {
    display: flex;
    align-items: center;
}

.radio-options-wrapper label {
    min-width: auto;
    margin-bottom: 0;
    margin-left: 8px;
}

.gradient-presets {
    display: flex;
    gap: 10px;
    align-items: center;
}
.gradient-preset {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.2s;
    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
}
.gradient-preset.active {
    border-color: #5856d6;
}
.gradient-preset.custom {
    background: #f0f2f5;
    border-style: dashed;
    display: flex;
    align-items: center;
    justify-content: center;
}
.gradient-preset.custom svg {
    width: 18px;
    height: 18px;
    stroke: #606770;
}

.mobile-only-hr {
    display: none;
}

/* Smaller screen adjustments */
@media (max-width: 640px) {
    body {
        padding: 15px 10px;
        align-items: stretch; /* Allow container to fill width */
    }
    .settings-panel {
        padding: 20px 15px;
    }
    .preview-panel {
        max-width: 260px;
        margin-left: auto;
        margin-right: auto;
        padding-bottom: 25px;
    }
    h1 {
        font-size: 2.2em;
    }
    fieldset > div:not(.setting-row):not(.radio-options-wrapper):not(.color-controls):not(.preset-controls) {
        flex-direction: column;
        align-items: flex-start;
    }
    fieldset > div:not(.setting-row):not(.radio-options-wrapper):not(.color-controls):not(.preset-controls) > label {
        margin-bottom: 5px;
        min-width: auto;
    }
    .color-controls {
        flex-wrap: wrap;
        gap: 10px 15px;
    }
    .color-controls > label {
        min-width: auto;
        margin-right: 0;
    }
    input[type="text"],
    select {
        width: 100%;
        box-sizing: border-box;
    }
    .tab-button {
        padding: 10px 15px;
        font-size: 15px;
    }
    .gradient-presets {
        flex-wrap: wrap;
    }
    .mobile-only-hr {
        display: block;
    }
}

/* --- Hamburger Menu (from common.css) --- */
.hamburger-menu {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 30px;
    height: 21px;
    cursor: pointer;
    z-index: 1001; /* Overlayよりも手前に */
    background-color: transparent;
    border: none;
    padding: 0;
}

.hamburger-menu span {
    display: block;
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: #333;
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}

.hamburger-menu:hover {
    background-color: transparent;
    transform: none;
}

.hamburger-menu span:nth-child(1) { top: 0; }
.hamburger-menu span:nth-child(2) { top: 9px; }
.hamburger-menu span:nth-child(3) { top: 18px; }

/* Nav Menu */
.nav-menu {
    position: fixed;
    top: 0;
    right: -300px; /* Start off-screen */
    width: 250px;
    height: 100%;
    background-color: #fff;
    box-shadow: -2px 0 5px rgba(0,0,0,0.1);
    padding: 60px 20px 20px;
    transition: right 0.3s ease-in-out;
    z-index: 1000;
}

.nav-menu.open {
    right: 0; /* Slide in */
}

.nav-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu li {
    margin-bottom: 20px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 18px;
    font-weight: bold;
}

.nav-menu a:hover {
    color: #007bff;
}

/* Overlay for when menu is open */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
    z-index: 999;
}

.overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Hamburger animation to "X" */
.hamburger-menu.open span:nth-child(1) {
    top: 9px;
    transform: rotate(45deg);
}

.hamburger-menu.open span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.open span:nth-child(3) {
    top: 9px;
    transform: rotate(-45deg);
}