/* ============================================================
   Bill Tracker – Modern Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=DM+Serif+Display&display=swap');

/* ── Variabler ─────────────────────────────────────────────── */
:root {
    --bg:           #f1f5f9;
    --surface:      #ffffff;
    --nav-bg:       #0f172a;
    --nav-border:   rgba(255,255,255,.07);
    --accent:       #6366f1;
    --accent-dark:  #4f46e5;
    --accent-light: #eef2ff;
    --success:      #059669;
    --success-bg:   #ecfdf5;
    --warning:      #d97706;
    --warning-bg:   #fffbeb;
    --danger:       #e11d48;
    --danger-bg:    #fff1f2;
    --text:         #0f172a;
    --text-muted:   #64748b;
    --text-light:   #94a3b8;
    --border:       #e2e8f0;
    --border-focus: #6366f1;
    --radius-sm:    8px;
    --radius:       12px;
    --radius-lg:    16px;
    --shadow-xs:    0 1px 2px rgba(0,0,0,.05);
    --shadow-sm:    0 2px 4px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow:       0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
    --shadow-lg:    0 12px 32px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.05);
    --transition:   all .2s cubic-bezier(.4,0,.2,1);
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { text-decoration: none; opacity: .85; }
ul { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
img { max-width: 100%; }

/* ── Page load animation ───────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(.96); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}

.page-content {
    animation: fadeUp .35s ease both;
}

/* ── Skeleton loader ───────────────────────────────────────── */
.skeleton {
    background: linear-gradient(90deg, #f0f4f8 25%, #e2e8f0 50%, #f0f4f8 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: var(--radius-sm);
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ══════════════════════════════════════════════════════════════
   INLOGGNINGSSIDA
══════════════════════════════════════════════════════════════ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

.login-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    padding: 1.5rem;
    animation: scaleIn .4s cubic-bezier(.16,1,.3,1) both;
}

.login-brand {
    text-align: center;
    margin-bottom: 2rem;
    color: #fff;
}
.login-brand .brand-icon {
    font-size: 2.8rem;
    display: block;
    margin-bottom: .75rem;
    filter: drop-shadow(0 0 20px rgba(99,102,241,.6));
}
.login-brand h1 {
    font-family: 'DM Serif Display', serif;
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: -.5px;
    color: #fff;
}
.login-brand p {
    color: #94a3b8;
    font-size: .875rem;
    margin-top: .35rem;
}

.login-form {
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: var(--radius-lg);
    padding: 2.25rem 2rem;
    box-shadow: 0 32px 80px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.08);
}

/* Dekorativa cirklar */
.login-deco { position: fixed; inset: 0; pointer-events: none; z-index: 1; }
.deco-circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,.3), transparent 70%);
}
.c1 { width: 600px; height: 600px; top: -250px; right: -150px; opacity: .5; }
.c2 { width: 400px; height: 400px; bottom: -150px; left: -100px; opacity: .3; }
.c3 { width: 250px; height: 250px; top: 40%; left: 55%; background: radial-gradient(circle, rgba(139,92,246,.2), transparent 70%); opacity: .6; }

/* ══════════════════════════════════════════════════════════════
   APP LAYOUT
══════════════════════════════════════════════════════════════ */
.app-page {
    display: block;
    min-height: 100vh;
    padding-top: 64px;
}

.sidebar { display: none !important; }

.main-content {
    margin-left: 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2.5rem;
    width: 100%;
    animation: fadeUp .3s ease both;
}

/* ══════════════════════════════════════════════════════════════
   TOPNAV
══════════════════════════════════════════════════════════════ */
.topnav {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 64px;
    background: var(--nav-bg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 300;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 1px 24px rgba(0,0,0,.2);
}

.topnav-brand {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-family: 'DM Serif Display', serif;
    font-size: 1.1rem;
    color: #fff;
    text-decoration: none;
    letter-spacing: .01em;
}
.topnav-brand:hover { opacity: 1; }
.topnav-brand .brand-icon {
    font-size: 1.4rem;
    color: var(--accent);
    filter: drop-shadow(0 0 8px rgba(99,102,241,.5));
}

.topnav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topnav-username {
    display: flex;
    align-items: center;
    gap: .55rem;
    color: #94a3b8;
    font-size: .85rem;
    font-weight: 500;
}

.user-avatar-sm {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700;
    font-size: .78rem;
    flex-shrink: 0;
    box-shadow: 0 0 0 2px rgba(99,102,241,.3);
}

/* Inställningar-knapp */
.topnav-menu-wrap { position: relative; }

.topnav-settings-btn {
    display: flex;
    align-items: center;
    gap: .45rem;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.1);
    color: #e2e8f0;
    padding: .48rem 1rem;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.topnav-settings-btn:hover {
    background: rgba(255,255,255,.13);
    border-color: rgba(255,255,255,.18);
    color: #fff;
}
.topnav-settings-btn svg { flex-shrink: 0; }

/* Dropdown */
.topnav-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    min-width: 230px;
    overflow: hidden;
    z-index: 400;
    animation: slideDown .18s cubic-bezier(.16,1,.3,1);
}
.topnav-dropdown.open { display: block; }

.topnav-dropdown a {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .72rem 1.1rem;
    color: var(--text);
    font-size: .875rem;
    font-weight: 400;
    text-decoration: none;
    transition: background .12s;
    border-left: 3px solid transparent;
}
.topnav-dropdown a:hover {
    background: var(--bg);
    opacity: 1;
}
.topnav-dropdown a.active {
    background: var(--accent-light);
    color: var(--accent-dark);
    border-left-color: var(--accent);
    font-weight: 600;
}
.topnav-divider { height: 1px; background: var(--border); margin: .3rem 0; }
.topnav-logout { color: var(--danger) !important; }
.topnav-logout:hover { background: var(--danger-bg) !important; }

/* ══════════════════════════════════════════════════════════════
   PAGE HEADER
══════════════════════════════════════════════════════════════ */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.page-header h2 {
    font-family: 'DM Serif Display', serif;
    font-size: 1.9rem;
    font-weight: 400;
    letter-spacing: -.3px;
    color: var(--text);
}
.subtext {
    color: var(--text-muted);
    font-size: .875rem;
    margin-top: .15rem;
    font-weight: 400;
}

/* ══════════════════════════════════════════════════════════════
   SUMMARY CARDS
══════════════════════════════════════════════════════════════ */
.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.35rem 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: .4rem;
    transition: transform .2s ease, box-shadow .2s ease;
    position: relative;
    overflow: hidden;
    animation: fadeUp .3s ease both;
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}
.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: var(--radius) var(--radius) 0 0;
}
.card-neutral::before  { background: linear-gradient(90deg, #94a3b8, #cbd5e1); }
.card-warning::before  { background: linear-gradient(90deg, var(--warning), #fbbf24); }
.card-success::before  { background: linear-gradient(90deg, var(--success), #34d399); }
.card-danger::before   { background: linear-gradient(90deg, var(--danger), #fb7185); }

.card-label {
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    font-weight: 600;
}
.card-value {
    font-family: 'DM Serif Display', serif;
    font-size: 1.5rem;
    color: var(--text);
    line-height: 1.2;
    letter-spacing: -.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.card-neutral .card-value { color: var(--text); }
.card-warning .card-value { color: var(--warning); }
.card-success .card-value { color: var(--success); }
.card-danger  .card-value { color: var(--danger);  }

/* ══════════════════════════════════════════════════════════════
   FILTER TABS
══════════════════════════════════════════════════════════════ */
.filter-tabs {
    display: flex;
    gap: .4rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.filter-tab {
    padding: .4rem .95rem;
    border-radius: 20px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--surface);
    border: 1.5px solid var(--border);
    transition: var(--transition);
    text-decoration: none;
    letter-spacing: .01em;
}
.filter-tab:hover {
    background: var(--bg);
    color: var(--text);
    border-color: #cbd5e1;
    opacity: 1;
}
.filter-tab.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    box-shadow: 0 2px 8px rgba(99,102,241,.35);
}

/* ══════════════════════════════════════════════════════════════
   INVOICE SECTION
══════════════════════════════════════════════════════════════ */
.invoice-section h3 {
    font-family: 'DM Serif Display', serif;
    font-weight: 400;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--text);
}

.badge {
    background: var(--border);
    color: var(--text-muted);
    border-radius: 20px;
    padding: .1rem .6rem;
    font-size: .72rem;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
}

.invoice-table-wrap {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    overflow: hidden;
    overflow-x: auto;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    white-space: nowrap;
    table-layout: auto;
}
.invoice-table td:nth-child(1) { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
.invoice-table .actions { min-width: 160px; }
.invoice-table th {
    background: #f8fafc;
    padding: .8rem 1.1rem;
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-muted);
    font-weight: 600;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.invoice-table td {
    padding: .9rem 1.1rem;
    border-bottom: 1px solid var(--border);
    font-size: .875rem;
    vertical-align: middle;
    transition: background .12s;
}
.invoice-table tr:last-child td { border-bottom: none; }
.invoice-table tbody tr { transition: background .12s; }
.invoice-table tbody tr:hover td { background: #f8fafc; }

.row-overdue td { background: #fff5f7 !important; }
.row-overdue:hover td { background: #ffe4e9 !important; }
.row-soon td    { background: #fffbf0 !important; }
.row-soon:hover td { background: #fef3c7 !important; }

.invoice-title { font-weight: 500; color: var(--text); }
.note-hint { cursor: help; margin-left: .4rem; font-size: .8rem; opacity: .7; }

.category-tag {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: .18rem .5rem;
    font-size: .72rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: .01em;
}

.text-right { text-align: right; }
.amount {
    font-family: 'DM Serif Display', serif;
    font-size: 1rem;
    letter-spacing: -.2px;
}

.days-left    { display: block; font-size: .7rem; color: var(--warning); font-weight: 500; margin-top: 1px; }
.days-overdue { display: block; font-size: .7rem; color: var(--danger);  font-weight: 500; margin-top: 1px; }

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .22rem .7rem;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 600;
    letter-spacing: .02em;
}
.status-unpaid  { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.status-paid    { background: #f0fdf4; color: #166534; border: 1px solid #86efac; }
.status-overdue { background: #fff1f2; color: #9f1239; border: 1px solid #fda4af; }

.actions { white-space: nowrap; }

/* ══════════════════════════════════════════════════════════════
   EMPTY STATE
══════════════════════════════════════════════════════════════ */
.empty-state {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-muted);
    animation: fadeIn .3s ease;
}
.empty-icon { font-size: 3rem; display: block; margin-bottom: 1rem; opacity: .8; }
.empty-state p { font-size: .95rem; margin-bottom: 1.5rem; }

/* ══════════════════════════════════════════════════════════════
   FORM CARD
══════════════════════════════════════════════════════════════ */
.form-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    padding: 2rem;
    max-width: 720px;
    animation: fadeUp .3s ease both;
}

.form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: .4rem;
    margin-bottom: 1.25rem;
    min-width: 140px;
}
.form-group-grow { flex: 1; }

label {
    font-size: .75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}
.req { color: var(--danger); }

input[type="text"],
input[type="number"],
input[type="date"],
input[type="password"],
select,
textarea {
    padding: .65rem .95rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font-size: .9rem;
    transition: border-color .15s, box-shadow .15s;
    width: 100%;
    line-height: 1.5;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99,102,241,.12);
}
input::placeholder, textarea::placeholder { color: var(--text-light); }
textarea { resize: vertical; min-height: 90px; }
select { cursor: pointer; }

.form-actions {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-top: .5rem;
    flex-wrap: wrap;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* ══════════════════════════════════════════════════════════════
   BUTTONS
══════════════════════════════════════════════════════════════ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: .6rem 1.3rem;
    border-radius: var(--radius-sm);
    font-size: .875rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: .01em;
    text-decoration: none;
}
.btn:active { transform: scale(.97); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: #fff;
    box-shadow: 0 2px 8px rgba(99,102,241,.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-dark), #4338ca);
    box-shadow: 0 4px 16px rgba(99,102,241,.45);
    color: #fff;
    opacity: 1;
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1.5px solid var(--border);
}
.btn-ghost:hover {
    background: var(--bg);
    color: var(--text);
    border-color: #cbd5e1;
    opacity: 1;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #be123c);
    color: #fff;
    box-shadow: 0 2px 8px rgba(225,29,72,.3);
}
.btn-danger:hover { opacity: .9; }

.btn-full { width: 100%; padding: .75rem; }

.btn-sm {
    display: inline-flex;
    align-items: center;
    padding: .28rem .7rem;
    border-radius: 6px;
    font-size: .75rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    margin-right: .25rem;
    letter-spacing: .01em;
    text-decoration: none;
}
.btn-sm:active { transform: scale(.95); }
.btn-edit {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-edit:hover { background: #e2e8f0; color: var(--text); opacity: 1; }
.btn-pay  { background: var(--success); color: #fff; }
.btn-pay:hover { background: #047857; opacity: 1; }
.btn-undo {
    background: var(--bg);
    color: var(--text-muted);
    border: 1px solid var(--border);
}
.btn-undo:hover { opacity: .8; }

/* ══════════════════════════════════════════════════════════════
   ALERTS
══════════════════════════════════════════════════════════════ */
.alert {
    border-radius: var(--radius-sm);
    padding: .9rem 1.1rem;
    margin-bottom: 1.25rem;
    font-size: .875rem;
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    animation: slideDown .2s ease;
}
.alert-error   {
    background: var(--danger-bg);
    border: 1px solid #fda4af;
    color: #9f1239;
}
.alert-success {
    background: var(--success-bg);
    border: 1px solid #86efac;
    color: #166534;
}
.alert ul { margin: .35rem 0 0 1.1rem; }

/* ══════════════════════════════════════════════════════════════
   MINI CHART CARD (på dashboard)
══════════════════════════════════════════════════════════════ */
.chart-card {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    margin-bottom: 2rem;
    animation: fadeUp .35s ease both;
}
.chart-card h3 {
    font-family: 'DM Serif Display', serif;
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 1.25rem;
    color: var(--text);
}
.chart-wrap {
    position: relative;
    height: 180px;
}

/* ══════════════════════════════════════════════════════════════
   TOAST NOTIFICATION
══════════════════════════════════════════════════════════════ */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: .6rem;
    pointer-events: none;
}
.toast {
    background: var(--text);
    color: #fff;
    padding: .75rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: .875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: slideUp .25s cubic-bezier(.16,1,.3,1) both;
    pointer-events: all;
    max-width: 320px;
    display: flex;
    align-items: center;
    gap: .6rem;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.toast-success { background: #065f46; }
.toast-error   { background: #9f1239; }

/* ══════════════════════════════════════════════════════════════
   RESPONSIVT
══════════════════════════════════════════════════════════════ */
@media (max-width: 700px) {
    .main-content { padding: 1.25rem 1rem; }
    .form-row { flex-direction: column; }
    .page-header h2 { font-size: 1.5rem; }
    .topnav { padding: 0 1rem; }
    .topnav-username { display: none; }
    .topnav-settings-btn span { display: none; }
    .topnav-settings-btn { padding: .48rem .75rem; }
    .invoice-table th:nth-child(2),
    .invoice-table td:nth-child(2),
    .invoice-table th:nth-child(3),
    .invoice-table td:nth-child(3) { display: none; }
    .chart-wrap { height: 140px; }
    .chart-card { margin-bottom: 1.25rem; }
}

@media (max-width: 480px) {
    .filter-tabs { gap: .3rem; }
    .filter-tab { padding: .35rem .75rem; font-size: .75rem; }
    .empty-state { padding: 2.5rem 1rem; }
    .invoice-table th:nth-child(5),
    .invoice-table td:nth-child(5) { display: none; }
}