/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --color-bg: #f6f8fc;
    --color-surface: #ffffff;
    --color-primary: #6c5ce7;
    --color-primary-hover: #5a4bd1;
    --color-primary-light: #eeeaff;
    --color-success: #00b894;
    --color-warning: #fdcb6e;
    --color-danger: #e17055;
    --color-danger-hover: #d35d44;
    --color-text: #2d3436;
    --color-text-secondary: #636e72;
    --color-text-muted: #b2bec3;
    --color-border: #e0e4ec;
    --color-card-shadow: 0 2px 12px rgba(108, 92, 231, 0.08);
    --color-card-shadow-hover: 0 4px 24px rgba(108, 92, 231, 0.14);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===========================
   Auth Screen
   =========================== */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: var(--color-bg);
}

.auth-screen__inner {
    width: 100%;
    max-width: 420px;
}

.auth-screen__header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-screen__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.auth-screen__subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.auth-modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--color-card-shadow-hover);
    padding: 32px;
}

.auth-modal__header {
    text-align: center;
    margin-bottom: 20px;
}

.auth-modal__title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-text);
}

.auth-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    display: none;
}

.auth-error:not(:empty) {
    display: block;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-form__group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.auth-form__label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.auth-form__input {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font);
    outline: none;
    transition: var(--transition);
    background: var(--color-surface);
}

.auth-form__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.auth-modal__footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

/* ===========================
   App Container
   =========================== */
.app {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}


/* ===========================
   Footer
   =========================== */
.footer {
    padding: 8px 0 12px;
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: 32px;
}

.footer__inner {
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    opacity: 0.75;
}

.footer__inner a {
    color: var(--color-text-secondary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), color var(--transition);
}

.footer__inner a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* ===========================
   Header
   =========================== */
.header {
    padding: 28px 0 12px;
    text-align: center;
}


.header__inner {
    max-width: 700px;
    margin: 0 auto;
}

.header__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.header__subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* ===========================
   Actions Bar
   =========================== */
.actions-bar {
    display: flex;
    gap: 12px;
    padding: 20px 0;
    flex-wrap: wrap;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font);
    white-space: nowrap;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
}

.btn--primary:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.btn--outline {
    background: var(--color-surface);
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

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

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

.btn--text {
    background: none;
    color: var(--color-primary);
    padding: 8px 0;
    font-weight: 500;
}

.btn--text:hover {
    color: var(--color-primary-hover);
    transform: none;
}

.btn--full {
    width: 100%;
    justify-content: center;
    margin-top: 14px;
}

.btn--small {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn--sm-icon {
    padding: 8px 14px;
    font-size: 0.85rem;
}

.btn__icon {
    font-size: 1.2rem;
    font-weight: 400;
    line-height: 1;
}

/* ===========================
   Empty State
   =========================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state__icon {
    font-size: 4rem;
    margin-bottom: 16px;
}

.empty-state__title {
    font-size: 1.5rem;
    color: var(--color-text);
    margin-bottom: 8px;
}

.empty-state__text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   Goals Grid
   =========================== */
.goals-section {
    padding-bottom: 40px;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

/* ===========================
   Goal Card
   =========================== */
.goal-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--color-card-shadow);
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.goal-card:hover {
    box-shadow: var(--color-card-shadow-hover);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
}

.goal-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.goal-card__name {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    flex: 1;
    margin-right: 12px;
}

.goal-card__currency {
    font-size: 0.8rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 3px 10px;
    border-radius: 20px;
    font-weight: 600;
    white-space: nowrap;
}

.goal-card__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
}

.goal-card__stat {
    text-align: center;
    padding: 10px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.goal-card__stat-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text);
}

.goal-card__stat-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

.goal-card__progress {
    margin-bottom: 12px;
}

.goal-card__progress-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.goal-card__progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
    border-radius: 4px;
    transition: width 0.6s ease;
    width: 0%;
}

.goal-card__progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.goal-card__status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 20px;
}

.goal-card__status--on-track {
    background: #d4edda;
    color: #155724;
}

.goal-card__status--warning {
    background: #fff3cd;
    color: #856404;
}

.goal-card__status--danger {
    background: #f8d7da;
    color: #721c24;
}

.goal-card__status--success {
    background: #cce5ff;
    color: #004085;
}

.goal-card__actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.goal-card__actions .btn {
    flex: 1;
}

/* ===========================
   Goal Detail View
   =========================== */
.detail-section {
    padding-bottom: 60px;
}

.detail__back {
    margin-bottom: 16px;
    display: inline-block;
}

.detail-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--color-card-shadow);
    padding: 32px;
}

.detail-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.detail-card__name {
    font-size: 1.8rem;
    font-weight: 700;
}

.detail-card__badge {
    font-size: 0.85rem;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
}

.detail-card__stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.detail-stat {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 16px;
}

.detail-stat__value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.detail-stat__value--success {
    color: var(--color-success);
}

.detail-stat__value--danger {
    color: var(--color-danger);
}

.detail-stat__value--primary {
    color: var(--color-primary);
}

.detail-stat__label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* ===========================
   Charts
   =========================== */
.chart-section {
    margin-bottom: 32px;
}

.chart-section__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.chart-container {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
}

.chart-container canvas {
    width: 100% !important;
    height: auto !important;
    max-height: 300px;
}

/* Progress Scale */
.progress-scale {
    margin-bottom: 32px;
}

.progress-scale__track {
    position: relative;
    height: 40px;
    background: var(--color-border);
    border-radius: 20px;
    overflow: hidden;
    margin: 20px 0 8px;
}

.progress-scale__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
    border-radius: 20px;
    transition: width 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
    position: relative;
}

.progress-scale__fill-text {
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    padding-right: 12px;
    white-space: nowrap;
}

.progress-scale__labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* ===========================
   Recommendations
   =========================== */
.recommendations-section {
    margin-bottom: 32px;
}

.recommendations-section__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.recommendation-item {
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-text);
    border-left: 4px solid var(--color-primary);
}

.recommendation-item__icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.recommendation-item--special {
    background: linear-gradient(135deg, #6c5ce7, #a855f7);
    color: #fff;
    border-left: 4px solid #fff;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

.recommendation-item--special .recommendation-item__icon {
    font-size: 1.4rem;
}

/* ===========================
   What-If Scenarios
   =========================== */
.whatif-section {
    margin-bottom: 32px;
}

.whatif-section__title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.whatif-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
}

.whatif-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.whatif-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--color-card-shadow);
}

.whatif-card__title {
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 12px;
    color: var(--color-text);
}

.whatif-card__controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.whatif-card__input {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font);
    outline: none;
    transition: var(--transition);
}

.whatif-card__input:focus {
    border-color: var(--color-primary);
}

.whatif-card__result {
    font-size: 0.9rem;
    padding: 8px 12px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    font-weight: 600;
    margin-top: 8px;
}

.whatif-card__result--better {
    color: var(--color-success);
}

.whatif-card__result--worse {
    color: var(--color-danger);
}

/* ===========================
   Modal
   =========================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.25s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.modal--small {
    max-width: 440px;
}

.modal--goal {
    max-width: 600px;
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px 0;
}

.modal__title {
    font-size: 1.3rem;
    font-weight: 700;
}

.modal__close {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0 4px;
    line-height: 1;
    transition: var(--transition);
}

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

.modal__body {
    padding: 24px 28px;
}

.modal__footer {
    padding: 0 28px 24px;
}

/* ===========================
   Form
   =========================== */
.form {
    padding: 24px 28px 28px;
}

.form__group {
    margin-bottom: 18px;
}

.form__label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.form__input {
    width: 100%;
    padding: 12px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font);
    outline: none;
    transition: var(--transition);
    background: var(--color-surface);
}

.form__input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form__select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23636e72' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form__group--small {
    min-width: 120px;
}

.form__actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

.form__actions .btn {
    min-width: 120px;
}

/* ===========================
   Data Management
   =========================== */
.data-info {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.data-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
    .app {
        padding: 0 16px;
    }

    .header__title {
        font-size: 1.6rem;
    }

    .goals-grid {
        grid-template-columns: 1fr;
    }

    .actions-bar {
        flex-direction: column;
    }

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

    .form__row {
        grid-template-columns: 1fr;
    }

    .detail-card {
        padding: 20px;
    }

    .detail-card__stats {
        grid-template-columns: 1fr 1fr;
    }

    .detail-card__name {
        font-size: 1.4rem;
    }

    .modal {
        margin: 10px;
        max-height: 85vh;
    }

    .form {
        padding: 20px;
    }

    .modal__header {
        padding: 20px 20px 0;
    }

    .whatif-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .detail-card__stats {
        grid-template-columns: 1fr;
    }

    .goal-card__stats {
        grid-template-columns: 1fr;
    }
}

/* ===========================
   Interactive Sliders
   =========================== */
.interactive-panel {
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
}

.interactive-panel__title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.interactive-panel__title small {
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.interactive-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 600px) {
    .interactive-grid {
        grid-template-columns: 1fr;
    }
}

.interactive-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.interactive-field__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.interactive-field__label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.interactive-field__value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 2px 8px;
    width: 120px;
    text-align: right;
    font-family: var(--font);
}

.interactive-field__value:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

/* Custom range slider */
input[type="range"].interactive-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right, var(--color-primary) 0%, var(--color-border) 0%);
    outline: none;
    transition: background 0.15s;
    cursor: pointer;
}

input[type="range"].interactive-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform 0.15s;
}

input[type="range"].interactive-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type="range"].interactive-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    border: 3px solid white;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    cursor: pointer;
}

.interactive-field--savings .interactive-field__value {
    color: var(--color-success);
    border-color: var(--color-success);
}

.interactive-field--savings input[type="range"].interactive-slider::-webkit-slider-thumb {
    background: var(--color-success);
}

.interactive-field--savings input[type="range"].interactive-slider::-moz-range-thumb {
    background: var(--color-success);
}

.interactive-field--cost .interactive-field__value {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.interactive-field--cost input[type="range"].interactive-slider::-webkit-slider-thumb {
    background: var(--color-danger);
}

.interactive-field--cost input[type="range"].interactive-slider::-moz-range-thumb {
    background: var(--color-danger);
}

/* ===========================
   Scrollbar
   =========================== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}