/* CSS Reset & Variables */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fee2e2;
    --success: #10b981;
    --text-main: #111827;
    --text-muted: #6b7280;
    --bg-body: #f3f4f6;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    --ring-color: rgba(79, 70, 229, 0.2);

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography base */
h1,
h2,
h3,
h4 {
    color: var(--text-main);
    font-weight: 600;
}

p {
    color: var(--text-muted);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.font-semibold {
    font-weight: 600;
}

/* --- Login Page Styles --- */
.login-bg {
    background: linear-gradient(135deg, #f3f4f6 0%, #e0e7ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 3rem;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    animation: fadeUp 0.5s ease-out;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--primary-light);
    color: var(--primary);
    margin-bottom: 1rem;
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--bg-card);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--ring-color);
}

.error-message {
    color: var(--danger);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--danger-light);
    border-radius: var(--radius-md);
    text-align: center;
}

/* Buttons */
button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background-color: var(--primary);
    color: white;
    font-weight: 500;
    font-size: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    padding: 0.6rem 1rem;
    background-color: white;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--bg-body);
}

.btn-text {
    background: transparent;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.btn-text:hover {
    color: var(--text-main);
}

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

.btn-danger:hover {
    color: var(--danger-hover);
    background: var(--danger-light);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    margin: -0.5rem -0.75rem;
}

/* Button Loading State */
.btn-primary.loading {
    color: transparent;
    position: relative;
    pointer-events: none;
}

.btn-primary.loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid white;
    border-bottom-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* --- App Layout --- */
.app-bg {
    background-color: #f8fafc;
}

.navbar {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
}

.logo-icon-small {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md);
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2.5rem;
}

.page-title {
    font-size: 2rem;
    letter-spacing: -0.025em;
    margin-bottom: 0.25rem;
}

/* Task Cards UI */
.task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.task-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.task-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(79, 70, 229, 0.3);
}

.task-card-header {
    margin-bottom: 1.5rem;
}

.project-badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

.task-name {
    font-size: 1.125rem;
    line-height: 1.4;
    margin-bottom: 1rem;
    word-break: break-word;
    transition: var(--transition);
}

.btn-edit-title:hover {
    color: var(--primary) !important;
    transform: scale(1.1);
}

.task-meta {
    display: flex;
    gap: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.task-card-body {
    flex-grow: 1;
    border-top: 1px dashed var(--border-color);
    padding-top: 1.25rem;
}

/* Input addons */
.input-prefix-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.currency-prefix {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    pointer-events: none;
}

.amount-input {
    padding-left: 2rem !important;
}

/* Autocomplete Custom dropdown */
.autocomplete-wrapper {
    position: relative;
}

.debtor-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 50;
    list-style: none;
    margin-top: 4px;
}

.debtor-dropdown li {
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid #f1f5f9;
}

.debtor-dropdown li:last-child {
    border-bottom: none;
}

.debtor-dropdown li:hover {
    background-color: var(--bg-body);
}

.dropdown-company {
    display: block;
    font-weight: 500;
    color: var(--text-main);
}

.dropdown-code {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}

.dropdown-loading {
    padding: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}


.task-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
}

.btn-submit {
    width: auto;
    padding: 0.6rem 1.25rem;
}

/* Card Overlay spinner */
.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* Empty / Loading states */
.state-container {
    text-align: center;
    padding: 5rem 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px dashed var(--border-color);
    animation: fadeIn 0.3s;
}

.empty-icon {
    display: inline-flex;
    padding: 1.5rem;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.state-container h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-card);
    border-left: 4px solid var(--success);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

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

.toast span {
    font-weight: 500;
}


/* Animations */
@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

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

/* Tooltip simple approach */
.tooltip-wrap {
    position: relative;
    cursor: help;
}

.tooltip-wrap:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-5px);
    background: var(--text-main);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 10;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-color);
    border-bottom-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem auto;
}

.spinner.small {
    width: 24px;
    height: 24px;
    margin: 0;
}

/* --- Settings Page Sidebar Layout --- */
.settings-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.settings-sidebar {
    width: 250px;
    flex-shrink: 0;
    min-height: calc(100vh - 12rem);
    position: sticky;
    top: 5rem;
}

.settings-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.settings-menu li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.settings-menu li a:hover {
    background: var(--bg-card);
    color: var(--text-main);
}

.settings-menu li a.active {
    background: var(--primary-light);
    color: var(--primary);
}

.settings-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.settings-panel {
    display: none;
}

.settings-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* Color Picker Row */
.color-picker-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.color-picker-group input[type="color"] {
    width: 50px;
    height: 50px;
    padding: 0;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    overflow: hidden;
}

.color-picker-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-group input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: var(--radius-md);
}

/* User Profile Avatar & Dropdown */
.nav-profile {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.avatar-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
    overflow: hidden;
    position: relative;
    box-shadow: 0 0 0 2px white, 0 0 0 4px var(--primary-light);
    transition: var(--transition);
}

.avatar-circle:hover {
    box-shadow: 0 0 0 2px white, 0 0 0 4px var(--primary);
}

.avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 100;
    overflow: hidden;
}

.profile-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-body);
}

.dropdown-header .user-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    display: block;
    margin-bottom: 0.25rem;
}

.dropdown-header .user-email {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dropdown-menu {
    list-style: none;
    padding: 0.5rem 0;
}

.dropdown-menu li a, 
.dropdown-menu li button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    width: 100%;
    text-align: left;
    background: transparent;
    border: none;
    cursor: pointer;
}

.dropdown-menu li a:hover,
.dropdown-menu li button:hover {
    background: var(--bg-body);
    color: var(--primary);
}

.dropdown-menu li button.text-danger {
    color: var(--danger);
}

.dropdown-menu li button.text-danger:hover {
    background: var(--danger-light);
    color: var(--danger-hover);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.25rem 0;
}

/* --- Modals --- */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeUp 0.3s ease-out;
}