/* Nuki System - Modern SAAS UI */

/* 1. Root & Variables
-------------------------------------------------- */
:root {
    /* Colors */
    --c-primary: hsl(210, 90%, 55%);
    --c-primary-light: hsl(210, 90%, 96%);
    --c-primary-dark: hsl(210, 90%, 45%);
    --c-secondary: hsl(250, 7%, 26%);
    --c-accent: hsl(340, 85%, 60%);
    --c-success: hsl(150, 60%, 45%);
    --c-warning: hsl(40, 80%, 60%);
    --c-danger: hsl(350, 75%, 55%);
    
    --c-text-primary: hsl(210, 10%, 25%);
    --c-text-secondary: hsl(210, 8%, 55%);
    --c-text-muted: hsl(210, 8%, 75%);

    --c-bg-body: hsl(210, 20%, 98%);
    --c-bg-panel: #ffffff;
    --c-border: hsl(210, 15%, 92%);
    --c-border-light: hsl(210, 15%, 96%);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Spacing & Sizing */
    --spacing: 1.5rem;
    --spacing-half: calc(var(--spacing) / 2);
    --spacing-quarter: calc(var(--spacing) / 4);
    --border-radius: 0.75rem;
    --sidebar-width: 240px;
}

/* 2. Base & Layout
-------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    background-color: var(--c-bg-body);
    color: var(--c-text-primary);
    font-family: var(--font-family);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
    grid-template-areas: 
        "header header"
        "sidebar main";
}

.app-header { grid-area: header; }
.app-sidebar { grid-area: sidebar; }
.app-main { grid-area: main; }

.app-main {
    padding: var(--spacing);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* 3. Header & Sidebar
-------------------------------------------------- */
.app-header {
    background-color: var(--c-bg-panel);
    border-bottom: 1px solid var(--c-border);
    padding: 0 var(--spacing);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.app-header .brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--c-text-primary);
    text-decoration: none;
}
.app-header .brand .icon { color: var(--c-primary); }

.user-menu a {
    color: var(--c-text-secondary);
    text-decoration: none;
    font-weight: 500;
}
.user-menu a:hover { color: var(--c-primary); }

.app-sidebar {
    background-color: var(--c-bg-panel);
    border-right: 1px solid var(--c-border);
    padding: var(--spacing);
}
.app-sidebar nav a {
    display: block;
    padding: var(--spacing-half) var(--spacing);
    border-radius: calc(var(--border-radius) / 1.5);
    text-decoration: none;
    color: var(--c-text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-quarter);
}
.app-sidebar nav a.active,
.app-sidebar nav a:hover {
    background-color: var(--c-primary-light);
    color: var(--c-primary-dark);
}

/* 4. Page Header & Cards
-------------------------------------------------- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing);
}
.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}
.page-header p {
    color: var(--c-text-secondary);
    margin: 0.25rem 0 0;
}

.card {
    background-color: var(--c-bg-panel);
    border: 1px solid var(--c-border);
    border-radius: var(--border-radius);
    padding: var(--spacing);
}

/* 5. Table
-------------------------------------------------- */
.table-wrapper {
    overflow-x: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
table th, table td {
    padding: var(--spacing-half) var(--spacing);
    text-align: left;
    border-bottom: 1px solid var(--c-border-light);
    vertical-align: middle;
}
table th {
    color: var(--c-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}
table tbody tr:last-child td {
    border-bottom: 0;
}
table strong { font-weight: 600; }
table code {
    font-family: "SF Mono", "Fira Code", monospace;
    background-color: var(--c-bg-body);
    padding: 0.2em 0.4em;
    border-radius: 4px;
}

/* 6. Forms & Buttons
-------------------------------------------------- */
.button, button, [role="button"] {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border: 1px solid transparent;
    border-radius: calc(var(--border-radius) / 1.5);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.button.primary, button.primary {
    background-color: var(--c-primary);
    color: #fff;
}
.button.primary:hover, button.primary:hover { background-color: var(--c-primary-dark); }

.button.secondary, button.secondary {
    background-color: var(--c-bg-panel);
    color: var(--c-text-primary);
    border-color: var(--c-border);
}
.button.secondary:hover, button.secondary:hover { border-color: var(--c-primary); color: var(--c-primary); }

.button.destructive, button.destructive {
    background-color: var(--c-danger);
    color: #fff;
}
.button.destructive:hover, button.destructive:hover { opacity: 0.85; }

/* Form inputs */
input[type="text"],
input[type="datetime-local"],
textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--c-border);
    border-radius: calc(var(--border-radius) / 1.5);
    background-color: var(--c-bg-body);
    transition: border-color 0.2s ease;
}
textarea {
    resize: vertical;
}
input:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 2px var(--c-primary-light);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing);
}

/* 7. Status Badges & Flash Messages
-------------------------------------------------- */
.status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.status-pending { background-color: hsl(40, 80%, 93%); color: hsl(40, 70%, 40%); }
.status-created { background-color: hsl(150, 60%, 93%); color: hsl(150, 60%, 30%); }
.status-error { background-color: hsl(350, 75%, 95%); color: hsl(350, 70%, 45%); }
.status-active { background-color: hsl(150, 60%, 93%); color: hsl(150, 60%, 30%); }
.status-upcoming { background-color: hsl(210, 90%, 94%); color: hsl(210, 80%, 35%); }
.status-expired { background-color: hsl(0, 0%, 92%); color: hsl(0, 0%, 35%); }

.flash-message {
    padding: var(--spacing-half) var(--spacing);
    margin-bottom: var(--spacing);
    border-radius: var(--border-radius);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: var(--spacing-half);
}
.flash-message.success { background-color: var(--c-primary-light); border-color: var(--c-primary); color: var(--c-primary-dark); }
.flash-message.error { background-color: hsl(350, 75%, 97%); border-color: var(--c-danger); color: var(--c-danger); }


/* 8. Modal
-------------------------------------------------- */
dialog {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    padding: 0;
    max-width: 500px;
    width: 90%;
}
dialog::backdrop {
    background-color: rgba(30, 40, 60, 0.5);
    backdrop-filter: blur(4px);
}
dialog article { padding: 0; }
dialog header {
    padding: var(--spacing) var(--spacing) var(--spacing-half);
    border-bottom: 1px solid var(--c-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
}
dialog .close {
    text-decoration: none;
    color: var(--c-text-muted);
    font-size: 1.5rem;
    line-height: 1;
}
dialog .close:hover { color: var(--c-text-primary); }
dialog section {
    padding: var(--spacing);
}
dialog footer {
    padding: var(--spacing-half) var(--spacing);
    border-top: 1px solid var(--c-border);
    display: flex;
    justify-content: space-between;
}

.hidden { display: none !important; }
.text-muted { color: var(--c-text-muted); }
.text-center { text-align: center; }
.note-star {
    color: var(--c-primary);
    margin-left: 0.4rem;
    font-size: 0.9rem;
    cursor: help;
}
.note-star-empty {
    color: var(--c-text-muted);
    opacity: 0.6;
}
.action-buttons {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}
.action-buttons form {
    margin: 0;
}

@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-areas: 
            "header"
            "main";
    }
    .app-sidebar { display: none; }
}