/* ===========================
   CSS Variables & Theme
   =========================== */
:root {
    /* Colors */
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-secondary: #64748b;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    
    /* Neutrals */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    
    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #334155;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* ===========================
   Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; margin-bottom: var(--spacing-md); }

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

/* ===========================
   Login View
   =========================== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 100%);
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-header {
    margin-bottom: var(--spacing-xl);
}

.login-logo {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.login-header h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.login-header p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.login-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    transition: background-color var(--transition-fast);
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1rem;
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

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

.error-message {
    color: var(--color-danger);
    font-size: 0.875rem;
    min-height: 20px;
}

/* ===========================
   App Container
   =========================== */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ===========================
   Sidebar
   =========================== */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    transition: width var(--transition-normal);
    position: relative;
    z-index: 100;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-title,
.sidebar.collapsed .nav-item span {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
    flex-shrink: 0;
    color: var(--color-primary);
}

.sidebar-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    transition: opacity var(--transition-normal);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 0.75rem var(--spacing-lg);
    color: var(--sidebar-text);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--color-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-item:hover {
    background-color: var(--sidebar-hover);
    color: white;
}

.nav-item.active {
    background-color: var(--sidebar-hover);
    color: white;
}

.nav-item.active::before {
    opacity: 1;
}

.nav-item svg {
    flex-shrink: 0;
}

.nav-item span {
    transition: opacity var(--transition-normal);
}

.sidebar-toggle {
    margin: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--sidebar-hover);
    color: var(--sidebar-text);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

/* ===========================
   Main Content
   =========================== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Top Navigation */
.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.top-nav-left h2 {
    margin: 0;
    color: var(--color-text);
}

.top-nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-xs);
}

.user-email {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}

.user-role {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.125rem 0.5rem;
    background-color: var(--color-bg);
    border-radius: var(--radius-sm);
}

/* ===========================
   View Container
   =========================== */
.view-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* ===========================
   Dashboard
   =========================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.dashboard-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.tasks-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.empty-state {
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--spacing-xl);
    font-size: 0.95rem;
}

/* ===========================
   Calendar View
   =========================== */
.calendar-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

/* ===========================
   Settings View
   =========================== */
.settings-section {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    max-width: 600px;
}

.settings-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-item label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.setting-item p {
    font-size: 1rem;
    color: var(--color-text);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .top-nav {
        padding: var(--spacing-md);
    }
    
    .user-info {
        display: none;
    }
    
    .view-container {
        padding: var(--spacing-md);
    }
}
/* ===========================
   Project Cards
   =========================== */
.project-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.project-card-header h4 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.project-status {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-transform: uppercase;
}

.project-status.active {
    background-color: #dbeafe;
    color: #1e40af;
}

.project-status.completed {
    background-color: #d1fae5;
    color: #065f46;
}

.project-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.project-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.project-info svg {
    flex-shrink: 0;
}

/* ===========================
   Task Items
   =========================== */
.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.task-item:hover {
    background-color: #e0e7ff;
}

.task-item-content h5 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 0.95rem;
    color: var(--color-text);
}

.task-project {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
}

.task-item-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ===========================
   Loading Spinner
   =========================== */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.spinner-icon {
    animation: spin 1s linear infinite;
    color: var(--color-primary);
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
/* ===========================
   New Project & Detail Utilities
   =========================== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.section-header h3 {
    margin-bottom: 0;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.text-muted {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 450px;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
   max-height: 90vh; 
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-header h3 { margin: 0; }

.icon-btn {
    background: none;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}
.icon-btn:hover { color: var(--color-danger); }

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.form-group input {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* Project Detail View */
.detail-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.detail-header h2 { margin-bottom: var(--spacing-xs); }

.phases-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.phase-block {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.phase-block h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-primary-dark);
    font-size: 1.1rem;
    border-bottom: 2px solid var(--color-bg);
    padding-bottom: var(--spacing-xs);
}

.phase-tasks {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}
/* ===========================
   Gating & Dynamic Deadline Styles
   =========================== */
.install-date-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}
.install-date-group label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 600;
}
.editable-date {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
}

/* Task States */
.task-locked {
    opacity: 0.45;
    pointer-events: none;
    background-color: #f1f5f9;
    border-left-color: var(--color-border);
}
.task-completed {
    border-left-color: var(--color-success);
    background-color: #f0fdf4;
}
.task-completed h5 {
    text-decoration: line-through;
    color: var(--color-text-muted);
}
.task-skipped {
    border-left-color: var(--color-warning);
    background-color: #fffbeb;
}
.task-skipped h5 {
    text-decoration: line-through;
    color: var(--color-text-muted);
}

/* Interactive Buttons */
.task-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    pointer-events: auto; /* Required to allow skip clicks on locked items if needed */
}
.btn-warning {
    background-color: var(--color-warning);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
}
.btn-warning:hover {
    background-color: #d97706;
}
.btn-skip {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}
.btn-skip:hover {
    border-color: var(--color-warning);
    color: var(--color-warning);
}
.btn-complete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    background: transparent;
    color: transparent;
    transition: all var(--transition-fast);
}
.btn-complete:hover {
    border-color: var(--color-success);
}
.task-completed .btn-complete {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: white;
}
.task-skipped .btn-complete {
    display: none;
}
.skip-badge {
    font-size: 0.7rem;
    background: var(--color-warning);
    color: white;
    padding: 0.1rem 0.4rem;
    border-radius: 12px;
    text-transform: uppercase;
    font-weight: bold;
}
/* AI Drawer */
.ai-drawer {
    position: fixed;
    right: -400px;
    top: 0;
    bottom: 0;
    width: 400px;
    background: var(--color-surface);
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    transition: right var(--transition-normal);
}
.ai-drawer.active { right: 0; }
.ai-header { padding: 1rem; border-bottom: 1px solid var(--color-border); display: flex; justify-content: space-between; align-items: center; }
.ai-chat-history { flex: 1; padding: 1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 1rem; }
.ai-message { padding: 0.75rem; border-radius: var(--radius-md); font-size: 0.9rem; max-width: 85%; }
.ai-message.user { background: var(--color-primary); color: white; align-self: flex-end; }
.ai-message.ai { background: var(--color-bg); border: 1px solid var(--color-border); align-self: flex-start; }
.ai-input-area { padding: 1rem; border-top: 1px solid var(--color-border); display: flex; gap: 0.5rem; }
.ai-input-area textarea { flex: 1; resize: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0.5rem; font-family: inherit; }

/* Communication Area inside Tasks */
.task-item { flex-direction: column; align-items: stretch; }
.task-main { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.task-communications { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--color-border); }
.chat-url-bar { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.chat-input { flex: 1; padding: 0.4rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: 0.85rem;}
.chat-link { display: inline-flex; align-items: center; gap: 0.2rem; color: var(--color-primary); font-size: 0.85rem; font-weight: 500; }
.notes-container { background: rgba(0,0,0,0.02); padding: 0.75rem; border-radius: var(--radius-md); }
.notes-list { max-height: 150px; overflow-y: auto; margin-bottom: 0.75rem; display: flex; flex-direction: column; gap: 0.5rem; }
.note-msg { font-size: 0.85rem; padding: 0.5rem; background: var(--color-surface); border-radius: var(--radius-sm); border: 1px solid var(--color-border); }
.note-input-area { display: flex; gap: 0.5rem; }
.note-textarea { flex: 1; height: 35px; resize: none; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0.4rem; font-size: 0.85rem; font-family: inherit; }
/* Capsule Link Button on Dashboard */
.btn-capsule {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background-color: #e8f0fe;
    color: var(--color-primary-dark);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid #cce0ff;
}
.btn-capsule:hover {
    background-color: #d2e3fc;
    box-shadow: var(--shadow-sm);
    color: var(--color-primary-dark);
}