/* Cloudscape Design System - Design Tokens */
:root {
    /* Colors - Cloudscape Palette */
    --color-background-container: #f9fafb;
    --color-background-container-content: #ffffff;
    --color-border-divider-default: #eaeded;
    --color-border-item-default: #d5dbdb;
    --color-text-body-default: #16191f;
    --color-text-body-secondary: #545b64;
    --color-text-heading-default: #16191f;
    --color-text-link-default: #0972d3;
    --color-text-link-hover: #033160;
    
    /* Interactive Colors */
    --color-background-button-primary-default: #0972d3;
    --color-background-button-primary-hover: #033160;
    --color-background-button-primary-active: #033160;
    --color-text-button-primary-default: #ffffff;
    
    --color-background-button-normal-default: #ffffff;
    --color-background-button-normal-hover: #f2f3f3;
    --color-background-button-normal-active: #eaeded;
    --color-text-button-normal-default: #16191f;
    --color-border-button-normal-default: #d5dbdb;
    
    /* Status Colors */
    --color-background-status-error: #fff4f4;
    --color-text-status-error: #d13212;
    --color-background-status-success: #f4fbf6;
    --color-text-status-success: #037f0c;
    --color-background-status-warning: #fff8e6;
    --color-text-status-warning: #ff9900;
    
    /* Spacing - Cloudscape Scale */
    --space-xs: 4px;
    --space-s: 8px;
    --space-m: 12px;
    --space-l: 16px;
    --space-xl: 20px;
    --space-xxl: 24px;
    --space-xxxl: 32px;
    
    /* Typography - Using Inter as close alternative to Amazon Ember */
    --font-family-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Roboto, Arial, sans-serif;
    --font-size-body-s: 12px;
    --font-size-body-m: 14px;
    --font-size-heading-xs: 14px;
    --font-size-heading-s: 16px;
    --font-size-heading-m: 18px;
    --font-size-heading-l: 20px;
    --font-size-heading-xl: 24px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --line-height-body: 1.5;
    --line-height-heading: 1.3;
    
    /* Shadows */
    --shadow-container: 0 1px 1px 0 rgba(0, 28, 36, 0.3), 1px 1px 1px 0 rgba(0, 28, 36, 0.15), -1px 1px 1px 0 rgba(0, 28, 36, 0.15);
    --shadow-dropdown: 0 4px 6px 0 rgba(0, 28, 36, 0.3), 0 2px 4px 0 rgba(0, 28, 36, 0.2);
    
    /* Border Radius */
    --border-radius: 2px;
    --border-radius-button: 2px;
}

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

body {
    font-family: var(--font-family-base);
    background: var(--color-background-container);
    min-height: 100vh;
    padding: var(--space-xl);
    color: var(--color-text-body-default);
    font-size: var(--font-size-body-m);
    line-height: var(--line-height-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

header {
    background: var(--color-text-heading-default);
    color: #ffffff;
    padding: var(--space-xl) var(--space-xxxl);
    margin-bottom: var(--space-xl);
    border-bottom: 2px solid var(--color-background-button-primary-default);
    box-shadow: var(--shadow-container);
}

header a[href*="logout"] {
    color: #ffffff !important;
    background-color: var(--color-text-status-error);
    text-decoration: none;
    font-size: var(--font-size-body-m);
    display: inline-block;
    padding: var(--space-s) var(--space-l);
    border: 1px solid var(--color-text-status-error);
    border-radius: var(--border-radius-button);
    transition: background-color 0.15s ease;
    font-weight: var(--font-weight-medium);
}

header a[href*="logout"]:hover {
    background-color: #b91c1c;
    color: #ffffff !important;
}

/* Header Icons */
.header-icons {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-icon-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: var(--space-s) var(--space-m);
    border-radius: var(--border-radius-button);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    font-size: var(--font-size-body-m);
}

.header-icon-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Help Dropdown */
.help-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-s);
    background: var(--color-background-container-content);
    border: 1px solid var(--color-border-item-default);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-dropdown);
    min-width: 200px;
    z-index: 1000;
    overflow: hidden;
}

.dropdown-menu a {
    display: block;
    padding: var(--space-m) var(--space-l);
    color: var(--color-text-body-default);
    text-decoration: none;
    transition: background-color 0.15s ease;
    border-bottom: 1px solid var(--color-border-divider-default);
    font-size: var(--font-size-body-m);
}

.dropdown-menu a:last-child {
    border-bottom: none;
}

.dropdown-menu a:hover {
    background-color: var(--color-background-button-normal-hover);
    color: var(--color-text-body-default);
}

header h1 {
    font-size: var(--font-size-heading-xl);
    margin-bottom: var(--space-xs);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-heading);
    color: #ffffff;
}

.subtitle {
    font-size: var(--font-size-body-m);
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.8);
    font-weight: var(--font-weight-normal);
}

.page-nav {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    background: var(--color-background-container-content);
    border: 1px solid var(--color-border-item-default);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-container);
    overflow: hidden;
}

.nav-link {
    padding: var(--space-m) var(--space-xl);
    background: var(--color-background-container-content);
    color: var(--color-text-body-default);
    text-decoration: none;
    border: none;
    border-right: 1px solid var(--color-border-divider-default);
    font-weight: var(--font-weight-normal);
    transition: background 0.15s ease;
    font-size: var(--font-size-body-m);
    display: inline-flex;
    align-items: center;
    gap: var(--space-s);
}

.nav-link:hover {
    background: var(--color-background-button-normal-hover);
    color: var(--color-text-body-default);
}

.nav-link.active {
    background: var(--color-background-container);
    color: var(--color-text-link-default);
    border-bottom: 2px solid var(--color-background-button-primary-default);
    font-weight: var(--font-weight-medium);
}

.tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    background: var(--color-background-container-content);
    border: 1px solid var(--color-border-item-default);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-container);
    overflow: hidden;
}

.tab-btn {
    padding: var(--space-m) var(--space-xl);
    background: var(--color-background-container-content);
    border: none;
    border-right: 1px solid var(--color-border-divider-default);
    cursor: pointer;
    font-size: var(--font-size-body-m);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-body-default);
    transition: background 0.15s ease;
    font-family: var(--font-family-base);
}

.tab-btn:hover {
    background: var(--color-background-button-normal-hover);
}

.tab-btn.active {
    background: var(--color-background-container);
    color: var(--color-text-link-default);
    border-bottom: 2px solid var(--color-background-button-primary-default);
    font-weight: var(--font-weight-medium);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.card {
    background: var(--color-background-container-content);
    border: 1px solid var(--color-border-item-default);
    border-radius: var(--border-radius);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow-container);
}

.card h2 {
    color: var(--color-text-heading-default);
    margin-bottom: var(--space-l);
    font-size: var(--font-size-heading-l);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-heading);
}

.chart-container {
    position: relative;
    height: 400px;
    margin-top: 20px;
}

.year-selector {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.year-selector label {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-body-default);
    font-size: var(--font-size-body-m);
}

.year-selector select {
    padding: var(--space-s) var(--space-m);
    border: 1px solid var(--color-border-item-default);
    border-radius: var(--border-radius-button);
    font-size: var(--font-size-body-m);
    cursor: pointer;
    background: var(--color-background-container-content);
    color: var(--color-text-body-default);
    font-family: var(--font-family-base);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.year-selector select:hover {
    border-color: var(--color-text-body-secondary);
}

.year-selector select:focus {
    outline: none;
    border-color: var(--color-background-button-primary-default);
    box-shadow: 0 0 0 2px rgba(9, 114, 211, 0.1);
}

.year-selector button {
    padding: var(--space-s) var(--space-l);
    background: var(--color-background-button-primary-default);
    color: var(--color-text-button-primary-default);
    border: none;
    border-radius: var(--border-radius-button);
    font-size: var(--font-size-body-m);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background 0.15s ease;
    font-family: var(--font-family-base);
}

.year-selector button:hover {
    background: var(--color-background-button-primary-hover);
}

.loading {
    text-align: center;
    padding: var(--space-xxxl);
    color: var(--color-text-body-secondary);
    font-size: var(--font-size-body-m);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.5em;
    }
    
    .card {
        padding: 15px;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .year-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .year-selector select,
    .year-selector button {
        width: 100%;
    }
}

/* ====================================================================
   Unified Buttons
   ==================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: var(--space-s) var(--space-l);
    font-family: var(--font-family-base);
    font-size: var(--font-size-body-m);
    font-weight: var(--font-weight-medium);
    line-height: 1.2;
    border-radius: var(--border-radius-button);
    border: 1px solid var(--color-border-button-normal-default);
    background: var(--color-background-button-normal-default);
    color: var(--color-text-button-normal-default);
    cursor: pointer;
    transition: background-color 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, color 0.15s ease;
    min-height: 36px;
    text-decoration: none;
}

.btn:hover {
    background: var(--color-background-button-normal-hover);
    border-color: var(--color-border-button-normal-default);
}

.btn:active {
    background: var(--color-background-button-normal-active);
}

.btn-primary,
.btn-load,
.btn-save,
.btn-add,
.btn-import,
.btn-payroll {
    background: var(--color-background-button-primary-default) !important;
    color: var(--color-text-button-primary-default) !important;
    border: 1px solid var(--color-background-button-primary-default) !important;
}

.btn-primary:hover,
.btn-load:hover,
.btn-save:hover,
.btn-add:hover,
.btn-import:hover,
.btn-payroll:hover {
    background: var(--color-background-button-primary-hover) !important;
    border-color: var(--color-background-button-primary-hover) !important;
}

.btn-secondary,
.btn-clear,
.btn-export {
    background: var(--color-background-button-normal-default) !important;
    color: var(--color-text-button-normal-default) !important;
    border: 1px solid var(--color-border-button-normal-default) !important;
}

.btn-secondary:hover,
.btn-clear:hover,
.btn-export:hover {
    background: var(--color-background-button-normal-hover) !important;
    border-color: var(--color-border-button-normal-default) !important;
}

.btn-warning {
    background: var(--color-text-status-warning) !important;
    color: #fff !important;
    border: 1px solid var(--color-text-status-warning) !important;
}

.btn-danger {
    background: var(--color-text-status-error) !important;
    color: #fff !important;
    border: 1px solid var(--color-text-status-error) !important;
}

.btn-success {
    background: var(--color-text-status-success) !important;
    color: #fff !important;
    border: 1px solid var(--color-text-status-success) !important;
}

.btn-ghost {
    background: transparent !important;
    color: var(--color-text-body-default) !important;
    border: 1px solid transparent !important;
}

.btn:disabled,
.btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}