@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    --background-color: #f6f7f8;
    --container-bg-color: #ffffff;
    --text-color: #1d1d1f;
    --subtle-text-color: #6e6e73;
    --border-color: #d2d2d7;
    --accent-color: #0a84ff;
    --code-bg-color: #f5f5f7;
    --shadow-color: rgba(0, 0, 0, 0.05);
}

html, body {
    margin: 0;
}

body {
    min-height: 100vh;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    padding: 20px;
    box-sizing: border-box;
    background-color: var(--background-color);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at top, #ffffff 0%, var(--background-color) 80%);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 0;
}

h1 {
    font-size: 2.5rem;
    font-weight: 650;
    margin-bottom: 0.5rem;
}

p {
    color: var(--subtle-text-color);
    font-size: 1rem;
    margin-bottom: 20px;
}

h2, h3 {
    font-size: 1.25rem;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-top: 0;
}

#app-container, #input-view, #annotation-view {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 0;
    height: 100%;
}

#input-view .input-area {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    background: var(--container-bg-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

#json-input-container {
    flex-grow: 1;
    min-height: 300px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.drop-zone {
    width:100%;
    min-height:80px;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align: center;
    cursor: pointer;
    color: var(--subtle-text-color);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    margin-top:12px;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.drop-zone.drag-over {
    border-color: var(--accent-color);
    background-color: rgba(10, 132, 255, 0.05);
}

#annotation-view {
    overflow-y: auto;
}

.io-container {
    display: flex;
    gap: 40px;
    flex-grow: 1;
    min-height: 0;
    height: 100%;
}

.annotation-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: space-between;
}

.header-right-group {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.annotation-header h2 { margin: 0; border: none; }

.output-area-edit, .output-area-schema {
    background: var(--container-bg-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex: 1 1 400px;
    min-height: 0;
    min-width: 0;
    height: 100%;
}

#edit-form-container, #schema-output-container {
    flex-grow: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

#schema-output-container {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.CodeMirror {
    height: 100%;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.9rem;
}

.options {
    display:flex;
    flex-direction:column;
    gap:4px;
    margin: 16px 0;
}

.options label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size:1rem;
    color: var(--subtle-text-color);
}

.options .title-row {
    margin-top:6px;
    display:flex;
    align-items:center;
    gap:8px;
    font-size:1.2rem;
    color:var(--subtle-text-color);
}

.options .title-row input {
    font-size:1.2rem;
    padding:6px 12px;
    line-height:1.4em;
    flex: 1;
    min-width: 0;
}

button#generate-btn {
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    background: linear-gradient(90deg, #0a84ff 0%, #007aff 100%);
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 6px 12px rgba(0, 122, 255, 0.25);
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.1s ease;
}

button#generate-btn:hover {
    background: linear-gradient(90deg, #2992ff 0%, #0a84ff 100%);
    box-shadow: 0 8px 16px rgba(0, 122, 255, 0.35);
}

button#generate-btn:active {
    transform: scale(0.97);
    box-shadow: 0 4px 8px rgba(0, 122, 255, 0.2);
}

button.download-btn{
    background: #28a745;
    border:none;
    color:#fff;
    padding:8px 18px;
    border-radius:8px;
    cursor:pointer;
    font-weight:600;
    transition:background .2s ease;
}
button.download-btn:disabled{background:#94d3a2;cursor:not-allowed;}
button.download-btn:hover:not(:disabled){background:#23913d;}

.button-primary {
    display: block;
    width: auto;
    padding: 12px 24px;
    border: none;
    background: linear-gradient(90deg, #0a84ff 0%, #007aff 100%);
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 6px 12px rgba(0, 122, 255, 0.25);
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.1s ease;
    text-align: center;
}

.button-primary:hover:not(:disabled) {
    background: linear-gradient(90deg, #2992ff 0%, #0a84ff 100%);
    box-shadow: 0 8px 16px rgba(0, 122, 255, 0.35);
}

.button-primary:active:not(:disabled) {
    transform: scale(0.97);
    box-shadow: 0 4px 8px rgba(0, 122, 255, 0.2);
}

.button-primary:disabled {
    background: #a0cffc;
    box-shadow: none;
    cursor: not-allowed;
}

#download-btn {
    background: linear-gradient(90deg, #28a745 0%, #218838 100%);
    box-shadow: 0 6px 12px rgba(40, 167, 69, 0.25);
}

#download-btn:hover:not(:disabled) {
    background: linear-gradient(90deg, #2ebf4f 0%, #28a745 100%);
    box-shadow: 0 8px 16px rgba(40, 167, 69, 0.35);
}

#download-btn:disabled {
    background: #94d3a2;
    box-shadow: none;
}

button#generate-btn {
    width: 100%;
}

#back-btn {
    background: var(--code-bg-color);
    color: var(--subtle-text-color);
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s ease;
}

#back-btn:hover { background: #e7e7ea; }

fieldset.collapsible > legend {
    cursor: pointer;
    position: relative;
    padding-left: 25px;
}

fieldset.collapsible > legend::before {
    content: '▶';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.8em;
    transition: transform 0.2s ease;
}

fieldset.collapsible:not(.collapsed) > legend::before {
    transform: translateY(-50%) rotate(90deg);
}

fieldset.collapsible.collapsed > *:not(legend) { display: none; }

#edit-form-container input {
    width: 100%;
    box-sizing: border-box;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 1rem;
}

input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 16px;
    height: 16px;
}

input[type="text"] {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 0.9rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.3);
}

footer {
    max-width: 1400px;
    margin: 20px auto 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

#json-input-container .CodeMirror,
#json-input-container .CodeMirror-scroll,
#schema-output-container .CodeMirror,
#schema-output-container .CodeMirror-scroll {
    height: 100% !important;
}

#edit-form-container {
    flex-grow: 1;
    min-height: 0;
    overflow-y: auto;
    padding-right: 10px;
}

#schema-edit-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
    padding-bottom: 20px;
    min-height: min-content;
}

fieldset {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

legend {
    font-weight: 500;
    padding: 0 10px;
    color: var(--text-color);
}

.output-area-edit fieldset {
    background: var(--code-bg-color);
    border-radius: 10px;
    padding: 18px 20px;
    margin: 0;
    margin-top: 16px;
    transition: background .2s ease;
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.output-area-edit fieldset:hover {
    background: #ebebee;
}

.output-area-edit legend {
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.2;
}

.output-area-edit label {
    font-size: 0.85rem;
    color: var(--subtle-text-color);
    margin-top: 12px;
    margin-bottom: 4px;
    display: block;
}

.output-area-edit input[type="text"] {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.9rem;
    width: 100%;
    box-sizing: border-box;
    transition: border .2s ease, box-shadow .2s ease;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

.output-area-edit input[type="text"]:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(10, 132, 255, .25);
    outline: none;
}

.output-area-edit fieldset fieldset {
    margin-left: 0;
    margin-right: 0;
    width: 100%;
}

.output-area-schema {
    box-shadow: 0 4px 12px rgba(0, 0, 0, .08);
}

#edit-form-container::-webkit-scrollbar {
    width: 8px;
}

#edit-form-container::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: 4px;
}

#edit-form-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

#edit-form-container::-webkit-scrollbar-thumb:hover {
    background: var(--subtle-text-color);
}

/* --- Mobile --- */
@media (max-width: 700px) {
    body { 
        padding: 20px;
        height: 100vh;
        overflow: hidden;
    }
    
    .container {
        padding: 0 10px;
        height: 100%;
        overflow: hidden;
    }

    h1 { 
        font-size: 2rem; 
        margin-bottom: 0.5rem;
    }
    
    p { 
        font-size: 1rem; 
        margin-bottom: 20px; 
    }

    #annotation-view {
        height: 100%;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .annotation-header {
        position: sticky;
        top: 0;
        background: var(--background-color);
        z-index: 10;
        padding-bottom: 15px;
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .header-right-group {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .options-panel-annotation {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .title-row-annotation {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .title-row-annotation input {
        width: 100%;
    }

    #download-btn {
        width: 100%;
    }

    #annotation-view .io-container {
        flex-direction: column;
        gap: 20px;
        height: auto;
        min-height: auto;
        padding-bottom: 20px;
    }

    .output-area-edit, .output-area-schema {
        padding: 20px;
        height: auto;
        min-height: 400px;
        flex: 0 0 auto;
    }

    #edit-form-container, #schema-output-container {
        height: calc(100% - 50px);
        min-height: 350px;
        overflow-y: auto;
    }

    #schema-output-container .CodeMirror {
        height: 100% !important;
    }

    .output-area-edit {
        padding: 20px;
    }

    .output-area-edit fieldset {
        padding: 15px;
        margin-top: 12px;
    }

    .output-area-edit legend {
        font-size: 0.95rem;
    }

    .output-area-edit label {
        font-size: 0.85rem;
    }

    .output-area-edit input[type="text"] {
        font-size: 0.9rem;
        padding: 8px;
    }

    #back-btn {
        width: 100%;
        text-align: center;
    }

    #input-view .input-area {
        padding: 20px;
    }

    .options {
        margin: 12px 0;
    }

    .title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .title-row input {
        width: 100%;
    }
}

.options-panel-annotation {
    display: flex;
    gap: 20px;
    align-items: center;
    font-size: 1rem;
    color: var(--subtle-text-color);
}

.options-panel-annotation label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.title-row-annotation {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.2rem;
    color: var(--subtle-text-color);
}

.title-row-annotation input {
    font-size: 1.2rem;
    padding: 6px 12px;
    line-height: 1.4em;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--container-bg-color);
} 

/* --- Retro Easter Egg Theme --- */
.theme-retro {
    --background-color: #0d0208;
    --container-bg-color: #0d0208;
    --text-color: #00ff41;
    --subtle-text-color: #00b32d;
    --border-color: #00ff41;
    --accent-color: #00ff41;
    --code-bg-color: #1a1a1a;
    --shadow-color: rgba(0, 255, 65, 0.2);

    font-family: 'Courier New', Courier, monospace;
    background: var(--background-color) !important;
}

.theme-retro h1, .theme-retro h2, .theme-retro h3, .theme-retro p, .theme-retro span, .theme-retro legend, .theme-retro label {
    text-shadow: 0 0 5px rgba(0, 255, 65, 0.5);
}

.theme-retro .button-primary,
.theme-retro button#generate-btn,
.theme-retro #download-btn,
.theme-retro #back-btn {
    background: transparent !important;
    border: 1px solid var(--accent-color) !important;
    color: var(--accent-color) !important;
    box-shadow: 0 0 10px var(--shadow-color) !important;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.theme-retro .button-primary:hover:not(:disabled),
.theme-retro button#generate-btn:hover,
.theme-retro #download-btn:hover:not(:disabled),
.theme-retro #back-btn:hover {
    background: rgba(0, 255, 65, 0.1) !important;
    color: #fff !important;
}

.theme-retro input[type="text"] {
    background: #0d0208 !important;
    color: #00ff41 !important;
    border: 1px solid #00ff41 !important;
}

.theme-retro .CodeMirror {
    background: #0d0208 !important;
}

.theme-retro .cm-s-material-darker.CodeMirror {
    background-color: #0d0208;
    color: #00ff41;
}
.theme-retro .cm-s-material-darker .CodeMirror-gutters {
    background: #0d0208;
    border-right: 1px solid #00ff41;
}
.theme-retro .cm-s-material-darker .CodeMirror-linenumber {
    color: #00b32d;
}
.theme-retro .cm-s-material-darker .CodeMirror-cursor {
    border-left: 1px solid #00ff41;
}
.theme-retro .cm-s-material-darker span.cm-keyword { color: #00ff41; }
.theme-retro .cm-s-material-darker span.cm-atom { color: #00b32d; }
.theme-retro .cm-s-material-darker span.cm-number { color: #00b32d; }
.theme-retro .cm-s-material-darker span.cm-string { color: #00ff41; }
.theme-retro .cm-s-material-darker span.cm-property { color: #00ff41; }
.theme-retro .cm-s-material-darker span.cm-variable-2 { color: #00ff41; }
.theme-retro .cm-s-material-darker span.cm-operator { color: #00ff41; }
.theme-retro .cm-s-material-darker .CodeMirror-activeline-background { background: rgba(0, 255, 65, 0.1); }
.theme-retro .cm-s-material-darker .CodeMirror-matchingbracket {
    text-decoration: underline;
    color: white !important;
}

.theme-retro .drop-zone {
    border-color: #00ff41;
}

.theme-retro .output-area-edit fieldset {
    background: #1a1a1a;
} 

/* === Dark/Light Theme Toggle === */
#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-color);
    transition: opacity 0.3s ease;
    opacity: 0.7;
    z-index: 1000;
}
#theme-toggle:hover { opacity: 1; }

/* Dark theme variable overrides */
body.dark-theme {
    --background-color: #1d1d1f;
    --container-bg-color: #2c2c2e;
    --text-color: #f5f5f7;
    --subtle-text-color: #a1a1a6;
    --border-color: #3a3a3c;
    --accent-color: #0a84ff;
    --code-bg-color: #1e1e1e;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body.dark-theme {
    background: radial-gradient(circle at top, #2c2c2e 0%, var(--background-color) 80%);
} 

/* === Advanced Sun/Moon Toggle Styles === */
:root {
    --toggle-icon-color: #1d1d1f; /* black for light theme */
}

/* Override previous generic button style */
#theme-toggle {
    width: 40px;
    height: 25px;
    border-radius: 4px;
    font-size: 0; /* hide any leftover inline text */
    top: 60px; /* Align with header */
}
#theme-toggle .knob {
    position: relative;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    transition: all 0.45s ease;
}

/* Light mode appearance */
body:not(.dark-theme) #theme-toggle .knob {
    background: transparent;
    box-shadow: inset 8px -8px 0 0 var(--toggle-icon-color);
    overflow: hidden;
    transform: scale(1);
}
body:not(.dark-theme) #theme-toggle .knob::before {
    content: "";
    position: absolute;
    right: -9px;
    top: -9px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--container-bg-color);
    transform: translate(0, 0);
    opacity: 1;
    transition: transform 0.45s ease;
}
body:not(.dark-theme) #theme-toggle .knob::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    margin: -4px 0 0 -4px;
    border-radius: 50%;
    box-shadow: 0 -23px 0 var(--toggle-icon-color), 0 23px 0 var(--toggle-icon-color), 23px 0 0 var(--toggle-icon-color), -23px 0 0 var(--toggle-icon-color), 15px 15px 0 var(--toggle-icon-color), -15px 15px 0 var(--toggle-icon-color), 15px -15px 0 var(--toggle-icon-color), -15px -15px 0 var(--toggle-icon-color);
    transform: scale(0);
    transition: all 0.35s ease;
}

/* Dark mode appearance */
body.dark-theme {
    --toggle-icon-color: #f5f5f7; /* white for dark theme */
}

body.dark-theme #theme-toggle .knob {
    background: var(--toggle-icon-color);
    border: 4px solid var(--toggle-icon-color);
    transform: scale(0.55);
}
body.dark-theme #theme-toggle .knob::before {
    content: "";
    position: absolute;
    right: -9px;
    top: -9px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--toggle-icon-color);
    transform: translate(14px, -14px);
    opacity: 0;
    transition: transform 0.45s ease;
}
body.dark-theme #theme-toggle .knob::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 8px;
    height: 8px;
    margin: -4px 0 0 -4px;
    border-radius: 50%;
    box-shadow: 0 -23px 0 var(--toggle-icon-color), 0 23px 0 var(--toggle-icon-color), 23px 0 0 var(--toggle-icon-color), -23px 0 0 var(--toggle-icon-color), 15px 15px 0 var(--toggle-icon-color), -15px 15px 0 var(--toggle-icon-color), 15px -15px 0 var(--toggle-icon-color), -15px -15px 0 var(--toggle-icon-color);
    transform: scale(1);
    transition: all 0.35s ease;
} 

/* --- Dark theme input/fieldset tweaks --- */
body.dark-theme input[type="text"],
body.dark-theme .output-area-edit input[type="text"] {
    background: var(--container-bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

body.dark-theme input[type="text"]:focus,
body.dark-theme .output-area-edit input[type="text"]:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(10, 132, 255, 0.25);
}

body.dark-theme .output-area-edit fieldset:hover {
    background: #323234; /* subtle highlight compared to container */
}