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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --bg: #f8fafc;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.phone-frame {
    width: 375px;
    height: 812px;
    background: var(--bg);
    border-radius: 40px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
    overflow: hidden;
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 30px;
    background: #1e293b;
    border-radius: 0 0 20px 20px;
    z-index: 100;
}

.app-container {
    height: 100%;
    position: relative;
    padding-top: 30px;
}

.screen {
    display: none;
    height: calc(100% - 30px);
    overflow-y: auto;
    background: var(--bg);
}

.screen.active {
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.app-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.household-name {
    font-size: 13px;
    color: var(--text-secondary);
}

.page-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.icon-btn:hover {
    background: var(--border);
    color: var(--text);
}

/* Summary Card */
.summary-card {
    margin: 16px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 20px;
    color: white;
}

.summary-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.summary-title {
    font-size: 15px;
    opacity: 0.9;
}

.summary-badge {
    font-size: 12px;
    background: rgba(255,255,255,0.2);
    padding: 4px 10px;
    border-radius: 20px;
}

.summary-stats {
    display: flex;
    justify-content: space-between;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
}

.stat-label {
    font-size: 12px;
    opacity: 0.8;
}

/* Sections */
.section {
    padding: 0 16px 16px;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* Request Card */
.request-card {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--card);
    border-radius: 16px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.2s;
}

.request-card:hover {
    transform: translateY(-2px);
}

.request-card.pending {
    border-left: 4px solid var(--warning);
}

.request-icon {
    font-size: 32px;
    margin-right: 14px;
}

.request-details {
    flex: 1;
}

.request-item {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.request-meta {
    font-size: 13px;
    color: var(--text-secondary);
}

.request-badge {
    font-size: 10px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    text-transform: uppercase;
}

.request-badge.new {
    background: var(--warning-light);
    color: var(--warning);
}

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.activity-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--card);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.activity-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 14px;
}

.activity-item.approved .activity-icon {
    background: var(--success-light);
    color: var(--success);
}

.activity-item.discussed .activity-icon {
    background: var(--warning-light);
    color: var(--warning);
}

.activity-details {
    flex: 1;
}

.activity-title {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.activity-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

.activity-time {
    font-size: 12px;
    color: var(--text-secondary);
}

/* FAB */
.fab {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: all 0.2s;
}

.fab:hover {
    background: var(--primary-dark);
    transform: translateX(-50%) translateY(-2px);
}

/* Request Form */
.request-form {
    padding: 20px;
    flex: 1;
}

.quick-add {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.quick-add-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.quick-add-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 16px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

.price-input-wrapper {
    position: relative;
}

.currency {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--text-secondary);
}

.price-input {
    padding-left: 32px;
}

.category-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.category-chip {
    padding: 10px 16px;
    background: var(--card);
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.category-chip.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.form-textarea {
    min-height: 80px;
    resize: none;
}

.submit-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.submit-btn:hover {
    background: var(--primary-dark);
}

.threshold-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* Approval Screen */
.approval-content {
    padding: 20px;
    flex: 1;
}

.requester-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.requester-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    color: white;
}

.requester-name {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
}

.requester-time {
    font-size: 13px;
    color: var(--text-secondary);
}

.purchase-card {
    background: var(--card);
    border-radius: 20px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 16px;
}

.purchase-image {
    font-size: 64px;
    margin-bottom: 16px;
}

.purchase-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.purchase-price {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.purchase-category {
    display: inline-block;
    padding: 6px 14px;
    background: var(--border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.purchase-note {
    background: var(--card);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}

.note-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.note-text {
    font-size: 14px;
    color: var(--text);
    font-style: italic;
}

.budget-context {
    background: var(--card);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 24px;
}

.budget-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
}

.budget-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.budget-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}

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

.budget-fill {
    position: absolute;
    height: 100%;
    background: var(--success);
    border-radius: 4px;
    transition: width 0.3s;
}

.budget-projected {
    position: absolute;
    height: 100%;
    background: var(--warning);
    border-radius: 4px;
    opacity: 0.5;
}

.budget-note {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
    text-align: center;
}

.approval-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px 8px;
    border: none;
    border-radius: 14px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn.approve {
    background: var(--success);
    color: white;
}

.action-btn.approve:hover {
    background: #059669;
}

.action-btn.discuss {
    background: var(--primary);
    color: white;
}

.action-btn.discuss:hover {
    background: var(--primary-dark);
}

.action-btn.hold {
    background: var(--border);
    color: var(--text-secondary);
}

.action-btn.hold:hover {
    background: #cbd5e1;
}

/* Settings */
.settings-content {
    padding: 20px;
    flex: 1;
}

.settings-section {
    margin-bottom: 28px;
}

.settings-section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.settings-section-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.threshold-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.threshold-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--card);
    border-radius: 12px;
}

.threshold-icon {
    font-size: 24px;
}

.threshold-details {
    flex: 1;
}

.threshold-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.threshold-value {
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
}

.threshold-slider {
    width: 80px;
    accent-color: var(--primary);
}

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

.member-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--card);
    border-radius: 12px;
}

.member-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.member-avatar.you {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.member-name {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.member-role {
    font-size: 12px;
    color: var(--text-secondary);
}

.add-member-btn {
    padding: 14px;
    background: transparent;
    border: 2px dashed var(--border);
    border-radius: 12px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.add-member-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.toggle-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px;
    background: var(--card);
    border-radius: 12px;
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--text);
}

.toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border);
    border-radius: 28px;
    transition: 0.3s;
}

.toggle-slider::before {
    position: absolute;
    content: '';
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: 0.3s;
}

.toggle input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* Modal */
.modal {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    justify-content: center;
    align-items: center;
    padding: 20px;
    z-index: 100;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card);
    border-radius: 24px;
    padding: 32px;
    text-align: center;
    max-width: 300px;
    width: 100%;
}

.modal-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 16px;
}

.modal-icon.success {
    background: var(--success-light);
    color: var(--success);
}

.modal-icon.discuss {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.modal-icon.hold {
    background: var(--warning-light);
    color: var(--warning);
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.modal-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.modal-btn:hover {
    background: var(--primary-dark);
}

/* Responsive */
@media (max-width: 420px) {
    body {
        padding: 0;
    }
    
    .phone-frame {
        width: 100%;
        height: 100vh;
        border-radius: 0;
    }
    
    .phone-frame::before {
        display: none;
    }
    
    .app-container {
        padding-top: 0;
    }
    
    .screen {
        height: 100%;
    }
}