/* ================================
   RESET & BASE STYLES
   ================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color System - Warm Steel/Brown */
    --bg-primary: hsl(220, 15%, 13%);
    --bg-secondary: hsl(215, 12%, 17%);
    --bg-tertiary: hsl(210, 10%, 22%);
    --bg-card: hsl(215, 12%, 18%);
    --bg-hover: hsl(210, 10%, 25%);

    --text-primary: hsl(30, 10%, 95%);
    --text-secondary: hsl(30, 5%, 70%);
    --text-tertiary: hsl(30, 5%, 50%);

    --accent-primary: hsl(210, 70%, 55%);
    --accent-hover: hsl(210, 70%, 62%);
    --accent-active: hsl(210, 70%, 48%);

    --success: hsl(142, 71%, 45%);
    --warning: hsl(45, 93%, 58%);
    --error: hsl(0, 84%, 60%);

    --border-color: hsl(210, 10%, 28%);
    --border-light: hsl(210, 10%, 35%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ================================
   CONTAINER & LAYOUT
   ================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    width: 100%;
    flex: 1;
}

/* ================================
   COMPACT HEADER
   ================================ */

.header-compact {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    margin-bottom: var(--spacing-md);
}

.header-compact svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.header-compact h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), hsl(260, 90%, 70%));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-divider {
    color: var(--text-tertiary);
    font-weight: 300;
}

.header-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ================================
   COMPACT INPUT SECTION
   ================================ */

.input-section-compact {
    margin-bottom: var(--spacing-lg);
}

.input-section-compact .card {
    padding: var(--spacing-lg);
}

.input-row {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.nip-column {
    flex-shrink: 0;
}

.label-compact {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.label-hint-inline {
    font-weight: 400;
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.nip-input-compact {
    width: 150px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: var(--text-primary);
    resize: none;
    line-height: 1.5;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.nip-input-compact:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px hsla(210, 70%, 55%, 0.15);
}

.nip-input-compact::placeholder {
    color: var(--text-tertiary);
}

.nip-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
}

.nip-count {
    color: var(--text-secondary);
    font-weight: 500;
}

.time-inline {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--accent-primary);
}

.duplicate-inline {
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--warning);
}

/* Controls Column */
.controls-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-width: 160px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.email-toggle-compact {
    font-size: 0.8rem;
}

.checkbox-label-compact {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-custom-small {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-tertiary);
    position: relative;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.checkbox-input:checked+.checkbox-custom-small {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-input:checked+.checkbox-custom-small::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 7px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.email-field-compact {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.8rem;
}

.email-field-compact:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.suggestion-badge {
    font-size: 0.7rem;
    color: var(--warning);
    background: hsla(45, 93%, 58%, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Progress Inline */
.progress-inline {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.progress-bar-small {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill-small {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), hsl(260, 90%, 70%));
    border-radius: 999px;
    width: 0%;
    transition: width var(--transition-normal);
}

.progress-text-small {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 40px;
    text-align: right;
}

.background-notice-compact {
    font-size: 0.8rem;
    color: var(--success);
    padding: var(--spacing-xs);
    background: hsla(142, 71%, 45%, 0.1);
    border-radius: var(--radius-sm);
}

/* ================================
   CARD COMPONENT
   ================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: border-color var(--transition-normal);
}

.card:hover {
    border-color: var(--border-light);
}

/* ================================
   INPUT SECTION
   ================================ */

.input-section {
    margin-bottom: var(--spacing-lg);
}

.label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.label-hint {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

.nip-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: var(--text-primary);
    resize: vertical;
    transition: all var(--transition-normal);
}

.nip-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px hsla(220, 90%, 60%, 0.1);
}

.nip-input::placeholder {
    color: var(--text-tertiary);
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
}

.nip-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.validation-error {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: hsla(0, 84%, 60%, 0.1);
    border-left: 3px solid var(--error);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: 0.875rem;
    display: none;
}

.validation-error.show {
    display: block;
    animation: slideDown 0.3s ease;
}

/* Time Estimation */
.time-estimate {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-left: 3px solid var(--accent-primary);
}

.time-estimate svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

/* Duplicate Warning */
.duplicate-warning {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: hsla(45, 93%, 58%, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--warning);
    border-left: 3px solid var(--warning);
}

.duplicate-warning svg {
    color: var(--warning);
    flex-shrink: 0;
}

/* Email Mode Toggle */
.email-mode-toggle {
    margin-top: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.checkbox-input {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    position: relative;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.checkbox-input:checked+.checkbox-custom {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-input:checked+.checkbox-custom::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.email-suggestion {
    font-size: 0.75rem;
    color: var(--warning);
    background: hsla(45, 93%, 58%, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* Email Mode Input */
.email-mode-input {
    margin-top: var(--spacing-sm);
    animation: slideDown 0.3s ease;
}

.label-small {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.email-input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    transition: all var(--transition-normal);
}

.email-input-field:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px hsla(220, 90%, 60%, 0.1);
}

.email-input-field::placeholder {
    color: var(--text-tertiary);
}

/* ================================
   BUTTONS
   ================================ */


.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: inherit;
}

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

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 12px hsla(220, 90%, 60%, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px hsla(220, 90%, 60%, 0.4);
}

.btn-primary:active:not(:disabled) {
    background: var(--accent-active);
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

/* ================================
   PROGRESS SECTION
   ================================ */

.progress-section {
    margin-bottom: var(--spacing-lg);
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), hsl(260, 90%, 70%));
    border-radius: 999px;
    width: 0%;
    transition: width var(--transition-slow);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

/* Background Mode Notice */
.background-mode-notice {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: hsla(142, 71%, 45%, 0.1);
    border: 1px solid hsla(142, 71%, 45%, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.background-mode-notice svg {
    color: var(--success);
    flex-shrink: 0;
}

.notice-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.notice-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ================================
   RESULTS SECTION
   ================================ */

.results-section {
    animation: fadeIn 0.5s ease;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.results-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.results-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Email Form */
.email-form {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.email-input-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.email-input {
    flex: 1;
    min-width: 250px;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-normal);
}

.email-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px hsla(220, 90%, 60%, 0.1);
}

/* Table */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    max-height: calc(100vh - 280px);
    overflow-y: auto;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.results-table thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 1;
}

.results-table th {
    padding: var(--spacing-xs) var(--spacing-sm);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.results-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

.results-table tbody tr:hover {
    background: var(--bg-hover);
}

.results-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
}

/* No wrap for email address */
.results-table td.email-cell {
    white-space: nowrap;
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
}

/* Status Icons */
.status-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-size: 14px;
}

.status-icon-success {
    background: hsla(142, 71%, 45%, 0.2);
    color: var(--success);
}

.status-icon-warning {
    background: hsla(45, 93%, 58%, 0.2);
    color: var(--warning);
}

.status-icon-error {
    background: hsla(0, 84%, 60%, 0.2);
    color: var(--error);
}

/* ================================
   FOOTER
   ================================ */

.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

/* ================================
   UTILITY CLASSES
   ================================ */

.hidden {
    display: none !important;
}

/* ================================
   ANIMATIONS
   ================================ */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================================
   RESPONSIVE DESIGN
   ================================ */

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .header h1 {
        font-size: 2rem;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-actions {
        width: 100%;
    }

    .results-actions .btn {
        flex: 1;
        justify-content: center;
    }

    .email-input-group {
        flex-direction: column;
    }

    .email-input {
        width: 100%;
    }

    .results-table {
        font-size: 0.75rem;
    }

    .results-table th,
    .results-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.875rem;
    }
}