/* ============================================================
   Finance Assistant — Design System Global
   Variáveis, reset e utilitários base
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

/* ─── Variáveis ─────────────────────────────────────────── */

:root {
    /* Cores principais */
    --color-primary:        #2563EB;
    --color-primary-hover:  #1D4ED8;
    --color-primary-light:  #EFF6FF;

    --color-success:        #22C55E;
    --color-success-light:  #F0FDF4;

    --color-warning:        #F59E0B;
    --color-warning-light:  #FFFBEB;

    --color-danger:         #EF4444;
    --color-danger-hover:   #DC2626;
    --color-danger-light:   #FEF2F2;

    /* Neutros */
    --color-bg:             #F8FAFC;
    --color-surface:        #FFFFFF;
    --color-border:         #E2E8F0;
    --color-border-hover:   #CBD5E1;

    /* Texto */
    --color-text:           #0F172A;
    --color-text-secondary: #64748B;
    --color-text-muted:     #94A3B8;
    --color-text-inverse:   #FFFFFF;

    /* Sidebar */
    --color-sidebar-bg:     #0F172A;
    --color-sidebar-text:   #94A3B8;
    --color-sidebar-active: #FFFFFF;
    --color-sidebar-hover:  #1E293B;

    /* Tipografia */
    --font-sans:    'DM Sans', sans-serif;
    --font-mono:    'DM Mono', monospace;

    /* Tamanhos de fonte */
    --text-xs:    0.75rem;
    --text-sm:    0.875rem;
    --text-base:  1rem;
    --text-lg:    1.125rem;
    --text-xl:    1.25rem;
    --text-2xl:   1.5rem;
    --text-3xl:   1.875rem;

    /* Bordas */
    --radius-sm:    8px;
    --radius-md:    12px;
    --radius-lg:    16px;
    --radius-xl:    20px;
    --radius-full:  9999px;

    /* Sombras */
    --shadow-xs:  0 1px 2px rgba(0,0,0,.05);
    --shadow-sm:  0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:  0 4px 6px rgba(0,0,0,.05), 0 2px 4px rgba(0,0,0,.04);
    --shadow-lg:  0 10px 15px rgba(0,0,0,.06), 0 4px 6px rgba(0,0,0,.04);
    --shadow-xl:  0 20px 25px rgba(0,0,0,.07), 0 10px 10px rgba(0,0,0,.03);

    /* Espaçamentos */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.25rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Layout */
    --sidebar-width: 260px;
    --header-height: 64px;

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

/* ─── Reset ─────────────────────────────────────────────── */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img, svg {
    display: block;
    max-width: 100%;
}

input, button, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ─── Utilitários ───────────────────────────────────────── */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.text-success  { color: var(--color-success); }
.text-warning  { color: var(--color-warning); }
.text-danger   { color: var(--color-danger); }
.text-muted    { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }

.font-mono { font-family: var(--font-mono); }

/* ─── Botões ────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.625rem var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

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

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

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

.btn-danger {
    background: var(--color-danger);
    color: var(--color-text-inverse);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
}

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

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

.btn-sm {
    padding: 0.375rem var(--space-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: 0.75rem var(--space-6);
    font-size: var(--text-base);
}

.btn-block {
    width: 100%;
}

/* ─── Inputs ────────────────────────────────────────────── */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-input {
    width: 100%;
    padding: 0.625rem var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

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

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

.form-input.error {
    border-color: var(--color-danger);
}

.form-input.error:focus {
    box-shadow: 0 0 0 3px rgba(239,68,68,.12);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-danger);
}

.form-hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ─── Cards ─────────────────────────────────────────────── */

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

/* ─── Badges ────────────────────────────────────────────── */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    line-height: 1;
}

.badge-success { background: var(--color-success-light); color: #15803D; }
.badge-warning { background: var(--color-warning-light); color: #B45309; }
.badge-danger  { background: var(--color-danger-light);  color: #B91C1C; }
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-neutral { background: var(--color-bg); color: var(--color-text-secondary); border: 1px solid var(--color-border); }

/* ─── Toast ─────────────────────────────────────────────── */

#toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 9999;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--color-primary);
    font-size: var(--text-sm);
    min-width: 280px;
    max-width: 380px;
    animation: toast-in var(--transition-normal) ease forwards;
}

.toast.success { border-color: var(--color-success); }
.toast.error   { border-color: var(--color-danger); }
.toast.warning { border-color: var(--color-warning); }

@keyframes toast-in {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(20px); }
}

/* ─── Loading spinner ───────────────────────────────────── */

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 600ms linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ─── Responsividade base ───────────────────────────────── */

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }
}