/* ==========================================================================
   TransDoc Design System v2.0
   Style: Swiss Minimalism + Trust Authority
   Mode: Light (B2B SaaS standard)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    /* ===== Colors — Teal + Warm Orange ===== */
    --color-primary: #0D9488;
    --color-primary-hover: #0F766E;
    --color-primary-soft: #F0FDFA;
    --color-primary-border: #CCFBF1;

    --color-cta: #F97316;
    --color-cta-hover: #EA580C;

    --color-success: #10B981;
    --color-success-soft: #ECFDF5;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-danger-soft: #FEF2F2;

    /* Neutrals — Slate scale */
    --color-bg: #FFFFFF;
    --color-surface: #F8FAFC;
    --color-surface-hover: #F1F5F9;
    --color-border: #E2E8F0;
    --color-border-strong: #CBD5E1;

    --color-text: #0F172A;
    --color-text-muted: #64748B;
    --color-text-subtle: #94A3B8;

    /* ===== Typography ===== */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* ===== Spacing — 8px grid ===== */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

    /* ===== Radius ===== */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 999px;

    /* ===== Shadows ===== */
    --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);

    /* ===== Transitions ===== */
    --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* ===== Layout ===== */
    --container-max: 1200px;
    --nav-height: 64px;
    --z-nav: 100;
    --z-overlay: 900;
    --z-modal: 1000;
}

/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}
button, input, textarea, select { font-family: inherit; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-text);
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }

.text-muted { color: var(--color-text-muted); }
.text-subtle { color: var(--color-text-subtle); }
.text-center { text-align: center; }
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, #F97316 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Layout Utilities ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}
.hidden { display: none !important; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.2;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    text-decoration: none;
}
.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-cta {
    background: var(--color-cta);
    color: #fff;
    box-shadow: var(--shadow-sm);
}
.btn-cta:hover { background: var(--color-cta-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
    box-shadow: var(--shadow-xs);
}
.btn-secondary:hover { background: var(--color-surface); border-color: var(--color-border-strong); }

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
}
.btn-ghost:hover { background: var(--color-surface); color: var(--color-text); }

.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 6px 12px; font-size: 0.8125rem; }
.btn-block { width: 100%; }

/* ===== Form Inputs ===== */
.form-input {
    display: block;
    width: 100%;
    padding: 12px 14px;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
    margin-bottom: var(--space-3);
}
.form-input::placeholder { color: var(--color-text-subtle); }
.form-input:hover { border-color: var(--color-border-strong); }
.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}

/* ===== Card ===== */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }

/* ===== Badge / Pill ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    border-radius: var(--radius-full);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-border);
}
.badge-success { background: var(--color-success-soft); color: var(--color-success); border-color: #A7F3D0; }
.badge-warning { background: #FFFBEB; color: var(--color-warning); border-color: #FDE68A; }
.badge-neutral { background: var(--color-surface); color: var(--color-text-muted); border-color: var(--color-border); }

/* ===== Navbar ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.navbar-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 800;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
    color: var(--color-text);
}
.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-primary) 0%, #0F766E 100%);
    color: #fff;
    font-weight: 800;
    font-size: 0.875rem;
}
.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.nav-link {
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}
.nav-link:hover { color: var(--color-text); background: var(--color-surface); }

/* ===== Icons (SVG placeholder sizing) ===== */
.icon { width: 20px; height: 20px; flex-shrink: 0; }
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 24px; height: 24px; }

/* ===== Auth View ===== */
.auth-view {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background:
        radial-gradient(ellipse at top, #F0FDFA 0%, transparent 50%),
        radial-gradient(ellipse at bottom, #ECFDF5 0%, transparent 50%),
        var(--color-bg);
}
.auth-card {
    width: 100%;
    max-width: 420px;
    padding: var(--space-8);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}
.auth-header { text-align: center; margin-bottom: var(--space-6); }
.auth-header h2 { font-size: 1.5rem; margin-bottom: var(--space-2); }
.auth-switch {
    background: none;
    border: none;
    color: var(--color-primary);
    font-weight: 600;
    cursor: pointer;
    font-size: 0.875rem;
    padding: 4px;
}
.auth-switch:hover { text-decoration: underline; }
.error-msg {
    display: block;
    text-align: center;
    color: var(--color-danger);
    font-size: 0.8125rem;
    margin-bottom: var(--space-3);
    min-height: 1em;
}

/* ===== App Layout ===== */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.app-main {
    flex: 1;
    padding: var(--space-8) 0 var(--space-16);
}
.app-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--space-6);
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}
@media (max-width: 900px) {
    .app-grid { grid-template-columns: 1fr; }
}

/* ===== Sidebar ===== */
.sidebar { padding: var(--space-6); }
.sidebar-header { margin-bottom: var(--space-5); }
.sidebar-header h3 { font-size: 1rem; margin-bottom: var(--space-1); }
.user-email {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    word-break: break-all;
}

.credit-block {
    padding: var(--space-5);
    background: linear-gradient(135deg, var(--color-primary-soft) 0%, #ECFDF5 100%);
    border: 1px solid var(--color-primary-border);
    border-radius: var(--radius-lg);
    margin-top: var(--space-4);
}
.credit-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}
.credit-count {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    margin: var(--space-2) 0 var(--space-4);
}
.credit-count .num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}
.credit-count .unit { font-size: 0.875rem; color: var(--color-text-muted); }

.sub-status {
    padding: var(--space-3);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
}
.sub-status-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 2px;
}
.sub-status-info {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ===== Drop Zone ===== */
.drop-zone {
    padding: var(--space-12) var(--space-6);
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-xl);
    background: var(--color-surface);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: var(--space-6);
}
.drop-zone:hover, .drop-zone.active {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}
.drop-zone-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-4);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.drop-zone h3 { font-size: 1.125rem; margin-bottom: var(--space-2); }
.drop-zone p { color: var(--color-text-muted); font-size: 0.875rem; }

/* ===== Task List ===== */
.section-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-4);
}
.task-list { display: flex; flex-direction: column; gap: var(--space-3); }
.task-item {
    padding: var(--space-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}
.task-item:hover { border-color: var(--color-border-strong); box-shadow: var(--shadow-sm); }
.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}
.task-filename {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.status-badge {
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}
.status-queued { background: var(--color-surface); color: var(--color-text-muted); border: 1px solid var(--color-border); }
.status-processing { background: var(--color-primary-soft); color: var(--color-primary); border: 1px solid var(--color-primary-border); }
.status-translating { background: #FEF3C7; color: #B45309; border: 1px solid #FDE68A; }
.status-completed { background: var(--color-success-soft); color: var(--color-success); border: 1px solid #A7F3D0; }
.status-error { background: var(--color-danger-soft); color: var(--color-danger); border: 1px solid #FECACA; }

.progress-track {
    height: 4px;
    background: var(--color-surface);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width 400ms ease;
}
.progress-bar.done { background: var(--color-success); }
.progress-bar.error { background: var(--color-danger); }

.task-action { margin-top: var(--space-3); text-align: right; }

/* ===== Modal Overlay ===== */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}
.modal {
    width: 100%;
    max-width: 480px;
    background: var(--color-bg);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-6);
    max-height: 90vh;
    overflow-y: auto;
}
.modal-header {
    text-align: center;
    margin-bottom: var(--space-5);
}
.modal-header h3 { font-size: 1.25rem; margin-bottom: var(--space-1); }
.modal-header p { font-size: 0.875rem; color: var(--color-text-muted); }

/* ===== Plan Tab ===== */
.plan-tabs {
    display: flex;
    gap: var(--space-1);
    padding: 4px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
}
.plan-tab {
    flex: 1;
    padding: 8px 12px;
    font-size: 0.8125rem;
    font-weight: 500;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition);
}
.plan-tab:hover { color: var(--color-text); }
.plan-tab.active-tab {
    background: var(--color-bg);
    color: var(--color-text);
    font-weight: 600;
    box-shadow: var(--shadow-xs);
}

/* ===== Plan List (inside modal) ===== */
.plan-list { display: flex; flex-direction: column; gap: var(--space-3); }
.plan-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--space-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
    font-family: inherit;
}
.plan-option:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}
.plan-option-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.plan-option-title { font-size: 0.9375rem; font-weight: 600; color: var(--color-text); }
.plan-option-sub { font-size: 0.75rem; color: var(--color-text-muted); }
.plan-option-price { font-size: 1.125rem; font-weight: 700; color: var(--color-text); }
.plan-option-bonus {
    display: inline-block;
    margin-left: 6px;
    padding: 2px 6px;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-success);
    background: var(--color-success-soft);
    border-radius: var(--radius-sm);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .app-grid { padding: 0 var(--space-4); }
    .navbar-inner { padding: 0 var(--space-4); }
    .container { padding: 0 var(--space-4); }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}