/* ============================================
   RESET Y BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #fafafa;
    --color-fg: #1a1a1a;
    --color-accent: #00ff88;
    --color-blue: #0066ff;
    --color-orange: #ff6600;
    --color-muted: #666666;
    --color-border: #1a1a1a;
    --color-card: #ffffff;

    --font-mono: 'Space Mono', 'Courier New', monospace;
    --shadow-brutal: 8px 8px 0px 0px rgba(0, 0, 0, 1);
    --shadow-brutal-lg: 12px 12px 0px 0px rgba(0, 0, 0, 1);
    --shadow-brutal-sm: 4px 4px 0px 0px rgba(0, 0, 0, 1);
}

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

/* ============================================
   CONTAINER
   ============================================ */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container { padding: 0 1.5rem; }
}

@media (min-width: 1024px) {
    .container { padding: 0 2rem; }
}

/* ============================================
   HEADER
   ============================================ */
.header {
    border-bottom: 4px solid var(--color-border);
    background-color: var(--color-bg);
    padding: 1.5rem 0;
}

.header-title {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.025em;
}

/* ============================================
   MAIN
   ============================================ */
.main {
    flex: 1;
    padding: 3rem 0;
}

/* ============================================
   SCREENS
   ============================================ */
.screen {
    width: 100%;
}

.screen.hidden {
    display: none;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: var(--color-card);
    border: 4px solid var(--color-border);
    padding: 2rem;
}

.card-input {
    max-width: 28rem;
    margin: 0 auto;
    box-shadow: var(--shadow-brutal-lg);
}

.card-result {
    box-shadow: var(--shadow-brutal);
}

.card-generator {
    max-width: 28rem;
    margin: 0 auto;
    box-shadow: var(--shadow-brutal-lg);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
    margin-bottom: 1.5rem;
}

.label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.input {
    width: 100%;
    height: 3.5rem;
    font-size: 1.125rem;
    font-family: var(--font-mono);
    padding: 0 1rem;
    border: 4px solid var(--color-border);
    background-color: var(--color-card);
    color: var(--color-fg);
    outline: none;
    transition: border-color 0.2s;
}

.input:focus {
    border-color: var(--color-accent);
}

.input::placeholder {
    color: var(--color-muted);
}

.input-small {
    width: 5rem;
    text-align: center;
    flex-shrink: 0;
}

.help-text {
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-top: 0.5rem;
}

/* ============================================
   UPLOAD ZONES
   ============================================ */
.upload-zone {
    position: relative;
    margin-bottom: 1rem;
    border: 4px dashed var(--color-border);
    transition: all 0.2s;
}

.upload-zone-drag {
    border-color: var(--color-accent);
    background-color: rgba(0, 255, 136, 0.05);
}

.upload-zone-loaded {
    border-style: solid;
    border-color: var(--color-accent);
}

.file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.upload-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    cursor: pointer;
}

.upload-icon {
    font-size: 1.5rem;
    font-weight: 700;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--color-border);
    flex-shrink: 0;
}

.upload-title {
    font-size: 0.875rem;
    font-weight: 700;
}

.upload-hint {
    font-size: 0.7rem;
    color: var(--color-muted);
    margin-left: auto;
}

/* ============================================
   INSTRUCTIONS
   ============================================ */
.instructions {
    max-width: 28rem;
    margin: 1.5rem auto 0;
}

.instructions-toggle {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    padding: 0.75rem 0;
    color: var(--color-muted);
    list-style: none;
    transition: color 0.2s;
}

.instructions-toggle::-webkit-details-marker {
    display: none;
}

.instructions-toggle::before {
    content: '+ ';
}

details[open] .instructions-toggle::before {
    content: '- ';
}

.instructions-toggle:hover {
    color: var(--color-fg);
}

.instructions-content {
    border: 3px solid var(--color-border);
    padding: 1.5rem;
    margin-top: 0.5rem;
    background-color: var(--color-card);
}

.instructions-list {
    padding-left: 1.25rem;
    font-size: 0.75rem;
    line-height: 1.8;
}

.instructions-list strong {
    color: var(--color-fg);
}

.instructions-note {
    font-size: 0.7rem;
    color: var(--color-muted);
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 2px solid var(--color-border);
}

.instructions-note code {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 0.15rem 0.4rem;
    border: 1px solid var(--color-border);
    font-size: 0.7rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 700;
    padding: 0 2rem;
    height: 3.5rem;
    border: 4px solid var(--color-border);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.btn-primary {
    width: 100%;
    background-color: var(--color-accent);
    color: var(--color-fg);
    box-shadow: 6px 6px 0px 0px rgba(0, 0, 0, 1);
}

.btn-primary:not(:disabled):hover {
    box-shadow: 3px 3px 0px 0px rgba(0, 0, 0, 1);
    transform: translate(3px, 3px);
}

.btn-primary:not(:disabled):active {
    box-shadow: 0px 0px 0px 0px rgba(0, 0, 0, 1);
    transform: translate(6px, 6px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-fg);
}

.btn-outline:hover {
    background-color: var(--color-fg);
    color: var(--color-bg);
}

.btn-copy {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.4rem 0.75rem;
    height: auto;
    border: 3px solid var(--color-border);
    background-color: var(--color-card);
    color: var(--color-fg);
    cursor: pointer;
    transition: all 0.15s;
    flex-shrink: 0;
}

.btn-copy:hover {
    background-color: var(--color-accent);
}

.icon {
    width: 1rem;
    height: 1rem;
}

/* ============================================
   LOADER
   ============================================ */
.loader-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    min-height: 300px;
}

.loader {
    width: 8rem;
    height: 8rem;
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 0.5rem;
}

.loader-block {
    border: 4px solid var(--color-border);
    background-color: var(--color-accent);
    animation: pulse-block 1.6s ease-in-out infinite;
}

.loader-block-1 { animation-delay: 0s; }
.loader-block-2 { animation-delay: 0.2s; }
.loader-block-3 { animation-delay: 0.6s; }
.loader-block-4 { animation-delay: 0.4s; }

@keyframes pulse-block {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(0.85); opacity: 0.4; }
}

.loader-text {
    text-align: center;
}

.loader-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.loader-subtitle {
    font-size: 0.875rem;
    color: var(--color-muted);
}

/* ============================================
   RESULTS
   ============================================ */
.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.results-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .results-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card-header {
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.card-count {
    font-size: 1.875rem;
    font-weight: 700;
    display: block;
}

.card-count-accent { color: var(--color-accent); }
.card-count-blue { color: var(--color-blue); }
.card-count-orange { color: var(--color-orange); }

.card-list {
    max-height: 400px;
    overflow-y: auto;
    border: 2px solid var(--color-border);
    padding: 0.75rem;
    background-color: rgba(0, 0, 0, 0.02);
}

.card-list-item {
    font-size: 0.875rem;
    padding: 0.25rem 0;
}

.card-list-empty {
    font-size: 0.875rem;
    color: var(--color-muted);
}

/* ============================================
   SEPARATOR
   ============================================ */
.separator {
    border-top: 4px solid var(--color-border);
    margin: 3rem 0;
    max-width: 28rem;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   NAME GENERATOR
   ============================================ */
.generator-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.generator-row .input {
    flex: 1;
}

.generator-row .btn {
    flex-shrink: 0;
    width: auto;
    font-size: 0.875rem;
    padding: 0 1.25rem;
}

.generator-results {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.generator-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border: 3px solid var(--color-border);
    background-color: rgba(0, 0, 0, 0.02);
}

.generator-text {
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.generator-status {
    font-size: 0.7rem;
    color: var(--color-muted);
    margin-top: 0.75rem;
    min-height: 1em;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 1.5rem 0;
    background-color: var(--color-bg);
    text-align: center;
}

.footer-link {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-fg);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--color-accent);
}

/* ============================================
   SCROLLBAR
   ============================================ */
.card-list::-webkit-scrollbar {
    width: 8px;
}

.card-list::-webkit-scrollbar-track {
    background: transparent;
}

.card-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border: 2px solid var(--color-card);
}

.card-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}