html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

:root {
    --ui-scale: 1.50;
}

html {
    font-size: calc(16px * var(--ui-scale));
}

* {
    font-family: 'Source Code Pro', monospace;
}

.app-shell {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    width: 100vw;
    overflow: hidden;
}

.app-navbar {
    flex: 0 0 auto;
    border-bottom: 2px solid oklch(var(--b3));
}

/* ===== DESKTOP ===== */
@media (min-width: 1024px) {
    .app-main {
        flex: 1 1 auto;
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto 1fr auto;
        min-height: 0;
        overflow: hidden;
    }

    .panel-header-left {
        grid-column: 1;
        grid-row: 1;
        border-right: 2px solid oklch(var(--b3));
    }

    .panel-header-right {
        grid-column: 2;
        grid-row: 1;
    }

    .panel-body-left {
        grid-column: 1;
        grid-row: 2;
        border-right: 2px solid oklch(var(--b3));
    }

    .panel-body-right {
        grid-column: 2;
        grid-row: 2;
    }

    .panel-footer-left {
        grid-column: 1;
        grid-row: 3;
        border-right: 2px solid oklch(var(--b3));
    }

    .panel-footer-right {
        grid-column: 2;
        grid-row: 3;
    }
}

/* ===== MOBILE ===== */
@media (max-width: 1023px) {
    .app-main {
        flex: 1 1 auto;
        display: flex;
        flex-direction: column;
        min-height: 0;
        overflow: hidden;
    }

    .mobile-tabs {
        display: flex;
        flex: 0 0 auto;
        border-bottom: 2px solid oklch(var(--b3));
        background-color: oklch(var(--b2));
    }

    .mobile-tab {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.75rem 1rem;
        background: transparent;
        border: none;
        border-bottom: 3px solid transparent;
        color: oklch(var(--bc));
        opacity: 0.6;
        font-weight: 700;
        font-size: 0.875rem;
        cursor: pointer;
        transition: all 0.15s ease;
        font-family: 'Source Code Pro', monospace;
    }

    .mobile-tab:hover {
        opacity: 0.85;
    }

    .mobile-tab.active {
        opacity: 1;
        border-bottom-color: oklch(var(--p));
        background-color: oklch(var(--b1));
    }

    .mobile-tab i {
        font-size: 1.125rem;
    }

    .panel-content {
        flex: 1 1 auto;
        display: flex;
        flex-direction: column;
        min-height: 0;
        overflow: hidden;
    }

    .panel-header-mobile {
        flex: 0 0 auto;
        padding: 0.75rem 1rem;
        border-bottom: 2px solid oklch(var(--b3));
        background-color: oklch(var(--b2));
        display: flex;
        flex-direction: column;
        gap: 0.625rem;
    }

    .panel-header-mobile-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 0.75rem;
    }

    .panel-controls-mobile {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        align-items: flex-end;
    }

    .control-mobile {
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
        flex: 1 1 auto;
        min-width: 110px;
    }

    .control-mobile label {
        font-size: 0.6875rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: oklch(var(--bc));
        opacity: 0.75;
    }

    .control-mobile select {
        width: 100%;
        height: 2.5rem;
        padding: 0 2rem 0 0.75rem;
        font-size: 0.875rem;
        font-weight: 600;
        font-family: 'Source Code Pro', monospace;
    }

    .panel-body-mobile {
        flex: 1 1 auto;
        min-height: 0;
        overflow: hidden;
        background-color: oklch(var(--b1));
        position: relative;
    }

    .panel-footer-mobile {
        flex: 0 0 auto;
        padding: 0.75rem 1rem;
        border-top: 2px solid oklch(var(--b3));
        background-color: oklch(var(--b2));
    }
}

/* ===== Common panels ===== */
.panel-header {
    height: 4rem;
    min-height: 4rem;
    max-height: 4rem;
    padding: 0 1.25rem;
    border-bottom: 2px solid oklch(var(--b3));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background-color: oklch(var(--b2));
    overflow: hidden;
}

.panel-footer {
    height: 4.5rem;
    min-height: 4.5rem;
    max-height: 4.5rem;
    padding: 0 1rem;
    border-top: 2px solid oklch(var(--b3));
    background-color: oklch(var(--b2));
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.panel-body {
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: oklch(var(--b1));
    position: relative;
}

/* Wrapper para textarea con placeholder rico */
.textarea-wrapper {
    position: relative;
    flex: 1 1 auto;
    width: 100%;
    height: 100%;
    min-height: 0;
    background-color: oklch(var(--b1));
}

.panel-textarea,
.panel-output {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    resize: none;
    padding: 1.25rem;
    color: oklch(var(--bc));
    font-size: 1rem;
    line-height: 1.6;
    overflow-y: auto;
    font-family: 'Source Code Pro', monospace;
}

.panel-textarea {
    position: relative;
    z-index: 2;
    background-color: transparent;
}

@media (max-width: 640px) {

    .panel-textarea,
    .panel-output {
        padding: 1rem;
    }

    .panel-output {
        font-size: 1.5rem;
        line-height: 2rem;
        letter-spacing: 0.1875rem;
    }
}

.panel-textarea:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px oklch(var(--p));
}

.panel-output {
    font-size: 1.75rem;
    line-height: 2.25rem;
    letter-spacing: 0.25rem;
    white-space: pre-wrap;
    word-break: break-word;
    background-color: oklch(var(--b1));
}

/* Rich placeholder overlay */
.rich-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 1.25rem;
    pointer-events: none;
    overflow-y: auto;
    z-index: 1;
    color: oklch(var(--bc));
    opacity: 0.55;
    font-size: 1rem;
    line-height: 1.6;
    font-family: 'Source Code Pro', monospace;
    white-space: pre-wrap;
    background-color: oklch(var(--b1));
}

@media (max-width: 640px) {
    .rich-placeholder {
        padding: 1rem;
    }
}

.rich-placeholder strong {
    font-weight: 700;
    opacity: 1;
    color: oklch(var(--bc));
    display: block;
    margin-bottom: 0.75rem;
    font-size: 1.0625rem;
}

.rich-placeholder .examples-label {
    font-weight: 700;
    opacity: 1;
    margin-top: 0.5rem;
    margin-bottom: 0.375rem;
    display: block;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: oklch(var(--bc));
}

.rich-placeholder .example-line {
    display: block;
    padding-left: 0.75rem;
    opacity: 0.9;
    font-style: italic;
    color: oklch(var(--bc));
    margin-bottom: 0.125rem;
}

.rich-placeholder .braille-example {
    display: block;
    font-size: 1.5rem;
    letter-spacing: 0.1875rem;
    line-height: 2.25rem;
    padding-left: 0.75rem;
    opacity: 1;
    font-style: normal;
    color: oklch(var(--bc));
    margin-bottom: 0.125rem;
}

/* Desktop header controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: nowrap;
}

.header-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-control label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: oklch(var(--bc));
    opacity: 0.85;
}

.header-control select {
    min-width: 120px;
    height: 2.25rem;
    padding: 0 2rem 0 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: 'Source Code Pro', monospace;
}

.action-group {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.5rem;
    width: 100%;
}

@media (max-width: 640px) {
    .action-group {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 2.5rem;
    height: 2.5rem;
    padding: 0 0.875rem;
    white-space: nowrap;
    line-height: 1;
    border: 2px solid oklch(var(--bc));
    background-color: oklch(var(--bc));
    color: oklch(var(--b1));
    font-weight: 700;
    transition: all 0.15s ease;
}

.action-btn:hover:not(:disabled) {
    background-color: oklch(var(--b1));
    color: oklch(var(--bc));
}

.action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background-color: oklch(var(--b3));
    color: oklch(var(--bc));
    border-color: oklch(var(--b3));
}

.action-btn i {
    font-size: 1.125rem;
    line-height: 1;
    flex-shrink: 0;
    display: inline-block;
    width: 1.125rem;
    text-align: center;
}

.action-btn span {
    line-height: 1;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.stats-bar {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    font-size: 0.75rem;
    color: oklch(var(--bc));
    opacity: 0.75;
    white-space: nowrap;
}

.stats-bar strong {
    font-weight: 700;
    color: oklch(var(--bc));
    opacity: 1;
}

.modal-content {
    max-width: 600px;
}

.feature-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border: 2px solid oklch(var(--b3));
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 600;
    background-color: oklch(var(--b1));
    white-space: nowrap;
}

.feature-chip i {
    font-size: 0.875rem;
}

.panel-textarea::-webkit-scrollbar,
.panel-output::-webkit-scrollbar,
.rich-placeholder::-webkit-scrollbar {
    width: 10px;
}

.panel-textarea::-webkit-scrollbar-track,
.panel-output::-webkit-scrollbar-track,
.rich-placeholder::-webkit-scrollbar-track {
    background: oklch(var(--b2));
}

.panel-textarea::-webkit-scrollbar-thumb,
.panel-output::-webkit-scrollbar-thumb,
.rich-placeholder::-webkit-scrollbar-thumb {
    background: oklch(var(--b3));
    border-radius: 4px;
}

.panel-textarea::-webkit-scrollbar-thumb:hover,
.panel-output::-webkit-scrollbar-thumb:hover,
.rich-placeholder::-webkit-scrollbar-thumb:hover {
    background: oklch(var(--bc) / 0.4);
}

.btn-clear-mobile {
    height: 2.5rem;
    min-height: 2.5rem;
    padding: 0 0.875rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
}

:root {
    --action-green: #007f5f;
    --action-green-hover: #006b50;
}

.action-btn.action-btn--green:not(:disabled) {
    background-color: var(--action-green);
    border-color: var(--action-green);
    color: #ffffff;
}

.action-btn.action-btn--green:hover:not(:disabled) {
    background-color: var(--action-green-hover);
    border-color: var(--action-green-hover);
    color: #ffffff;
}

@media (max-width: 1023px) {
    .desktop-only {
        display: none !important;
    }
}

@media (min-width: 1024px) {
    .mobile-only {
        display: none !important;
    }
}