/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color Palette */
    --primary-dark: #05386B;
    --primary-medium: #379683;
    --primary-light: #5CDB95;
    --secondary-light: #8EE4AF;
    --background-light: #EDF5E1;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-medium) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-medium) 0%, var(--primary-light) 100%);
    --gradient-accent: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    --gradient-background: linear-gradient(135deg, var(--background-light) 0%, #ffffff 100%);
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-base: 0.25s ease-in-out;
    --transition-slow: 0.4s ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Base HTML Elements */
html {
    font-size: 16px;
    line-height: 1.6;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--gradient-background);
    color: var(--primary-dark);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-screen p {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 500;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* Header */
.header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__brand {
    display: flex;
    flex-direction: column;
}

.header__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
}

.header__subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.header__menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.header__menu-toggle span {
    width: 1.5rem;
    height: 2px;
    background: white;
    margin: 2px 0;
    transition: var(--transition-base);
}

.header__menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.header__menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.header__nav {
    display: flex;
}

.nav__list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav__link {
    color: white;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: var(--transition-base);
    font-weight: 500;
}

.nav__link:hover,
.nav__link.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* Sections */
.section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.section--active {
    display: block;
}

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

.section__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-dark);
    margin: 0;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn--primary {
    background: var(--gradient-secondary);
    color: white;
}

.btn--secondary {
    background: white;
    color: var(--primary-medium);
    border: 2px solid var(--primary-medium);
}

.btn--secondary:hover {
    background: var(--primary-medium);
    color: white;
}

.btn--cta {
    background: var(--gradient-accent);
    color: var(--primary-dark);
    font-size: var(--font-size-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    font-weight: 600;
}

.btn__icon {
    font-size: var(--font-size-lg);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stats-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: var(--transition-base);
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stats-card__icon {
    font-size: var(--font-size-3xl);
    width: 4rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--border-radius-lg);
}

.stats-card__number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-dark);
    margin: 0 0 var(--spacing-xs) 0;
}

.stats-card__label {
    color: var(--primary-medium);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Search Box */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box__input {
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) var(--spacing-xl);
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    width: 250px;
    transition: var(--transition-base);
}

.search-box__input:focus {
    outline: none;
    border-color: var(--primary-medium);
    box-shadow: 0 0 0 3px rgba(55, 150, 131, 0.1);
}

.search-box__icon {
    position: absolute;
    left: var(--spacing-sm);
    color: var(--primary-medium);
}

/* Filters */
.filters {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-light);
    background: white;
    color: var(--primary-medium);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.filter-btn:hover,
.filter-btn--active {
    background: var(--primary-light);
    color: white;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-base);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.project-card__header {
    background: var(--gradient-secondary);
    color: white;
    padding: var(--spacing-lg);
}

.project-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0 0 var(--spacing-sm) 0;
}

.project-card__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.project-card__body {
    padding: var(--spacing-lg);
}

.project-card__description {
    color: var(--primary-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-card__progress {
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--background-light);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.progress-bar__fill {
    height: 100%;
    background: var(--gradient-accent);
    transition: width var(--transition-slow);
}

.project-card__actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.btn--small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* View Toggle */
.view-toggle {
    display: flex;
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.view-toggle__btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: white;
    color: var(--primary-medium);
    cursor: pointer;
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.view-toggle__btn:hover,
.view-toggle__btn--active {
    background: var(--primary-light);
    color: white;
}

/* Schedule Controls */
.schedule-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.schedule-controls__left {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

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

.select-box {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    background: white;
    color: var(--primary-medium);
    cursor: pointer;
    min-width: 200px;
}

.date-range {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.date-input {
    padding: var(--spacing-sm);
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
}

.time-scale {
    display: flex;
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.time-scale__btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: white;
    color: var(--primary-medium);
    cursor: pointer;
    transition: var(--transition-base);
    font-size: var(--font-size-sm);
}

.time-scale__btn:hover,
.time-scale__btn--active {
    background: var(--primary-light);
    color: white;
}

/* Schedule Views */
.schedule-container {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.schedule-view {
    display: none;
    min-height: 400px;
}

.schedule-view--active {
    display: block;
}

/* Gantt Chart */
.gantt-chart {
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.gantt-header {
    display: flex;
    border-bottom: 2px solid var(--background-light);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
}

.gantt-task-list {
    width: 250px;
    font-weight: 600;
    color: var(--primary-dark);
}

.gantt-timeline {
    flex: 1;
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--primary-medium);
}

.gantt-row {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    min-height: 40px;
}

.gantt-task-name {
    width: 250px;
    padding-right: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--primary-dark);
}

.gantt-task-bar {
    flex: 1;
    position: relative;
    height: 20px;
    background: var(--background-light);
    border-radius: var(--border-radius-sm);
}

.gantt-bar {
    position: absolute;
    height: 100%;
    background: var(--gradient-accent);
    border-radius: var(--border-radius-sm);
    cursor: grab;
    transition: var(--transition-base);
}

.gantt-bar:hover {
    transform: scaleY(1.2);
}

.gantt-bar:active {
    cursor: grabbing;
}

/* Task List */
.task-list {
    padding: var(--spacing-lg);
}

.task-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border: 1px solid var(--background-light);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
    background: white;
    transition: var(--transition-base);
}

.task-item:hover {
    box-shadow: var(--shadow-md);
}

.task-item__content {
    flex: 1;
}

.task-item__title {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.task-item__meta {
    font-size: var(--font-size-sm);
    color: var(--primary-medium);
}

.task-item__actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Kanban Board */
.kanban-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

.kanban-column {
    background: var(--background-light);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    min-height: 400px;
}

.kanban-column__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-md);
    text-align: center;
    padding: var(--spacing-sm);
    background: white;
    border-radius: var(--border-radius-md);
}

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

.kanban-task {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    cursor: grab;
    transition: var(--transition-base);
}

.kanban-task:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.kanban-task:active {
    cursor: grabbing;
}

.kanban-task__title {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.kanban-task__meta {
    font-size: var(--font-size-sm);
    color: var(--primary-medium);
}

/* Reports Grid */
.reports-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.report-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.report-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.report-card__chart {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background-light);
    border-radius: var(--border-radius-md);
    color: var(--primary-medium);
}

/* Recent Projects */
.recent-projects {
    margin-bottom: var(--spacing-2xl);
}

.recent-projects__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
}

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

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.cta-section__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.cta-section__description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* FAQ Section */
.faq-section {
    margin-top: var(--spacing-2xl);
}

.faq-section__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-item__question {
    width: 100%;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary-dark);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
}

.faq-item__question::after {
    content: '+';
    position: absolute;
    right: var(--spacing-lg);
    font-size: var(--font-size-xl);
    transition: var(--transition-base);
}

.faq-item__question:hover {
    background: var(--background-light);
}

.faq-item__question.active::after {
    transform: rotate(45deg);
}

.faq-item__answer {
    padding: 0 var(--spacing-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item__answer.active {
    padding: 0 var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
    max-height: 200px;
}

.faq-item__answer p {
    color: var(--primary-medium);
    line-height: 1.6;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal__content {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.8);
    transition: var(--transition-base);
}

.modal.active .modal__content {
    transform: scale(1);
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--background-light);
}

.modal__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-dark);
    margin: 0;
}

.modal__close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--primary-medium);
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: var(--transition-base);
}

.modal__close:hover {
    color: var(--primary-dark);
    transform: scale(1.1);
}

/* Forms */
.form {
    padding: var(--spacing-lg);
}

.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form__label {
    display: block;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.form__input,
.form__textarea,
.form__select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--primary-light);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: var(--transition-base);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
    outline: none;
    border-color: var(--primary-medium);
    box-shadow: 0 0 0 3px rgba(55, 150, 131, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 80px;
}

.form__select[multiple] {
    min-height: 100px;
}

.form__help {
    font-size: var(--font-size-sm);
    color: var(--primary-medium);
    margin-top: var(--spacing-xs);
}

.form__actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

/* Notifications */
.notification-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-tooltip);
    max-width: 400px;
}

.notification {
    background: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-light);
    transform: translateX(100%);
    opacity: 0;
    animation: slideIn 0.3s ease-out forwards;
}

.notification--success {
    border-left-color: var(--primary-light);
}

.notification--error {
    border-left-color: #e74c3c;
}

.notification--warning {
    border-left-color: #f39c12;
}

.notification__title {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xs);
}

.notification__message {
    color: var(--primary-medium);
    font-size: var(--font-size-sm);
}

@keyframes slideIn {
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Footer */
.footer {
    background: var(--primary-dark);
    color: white;
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

.footer__text {
    text-align: center;
    font-size: var(--font-size-sm);
    margin: 0;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header__menu-toggle {
        display: flex;
    }
    
    .header__nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary-dark);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }
    
    .header__nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav__list {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }
    
    .nav__link {
        display: block;
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .section__header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .section__title {
        font-size: var(--font-size-2xl);
    }
    
    .section__actions {
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    
    .stats-card {
        flex-direction: column;
        text-align: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .search-box__input {
        width: 100%;
    }
    
    .schedule-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .schedule-controls__left,
    .schedule-controls__right {
        justify-content: center;
    }
    
    .kanban-board {
        grid-template-columns: 1fr;
    }
    
    .reports-grid {
        grid-template-columns: 1fr;
    }
    
    .form__row {
        grid-template-columns: 1fr;
    }
    
    .form__actions {
        flex-direction: column;
    }
    
    .cta-section {
        padding: var(--spacing-xl);
    }
    
    .cta-section__title {
        font-size: var(--font-size-2xl);
    }
    
    .notification-container {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .header__title {
        font-size: var(--font-size-xl);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-card {
        padding: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .modal__content {
        width: 95%;
        margin: var(--spacing-sm);
    }
    
    .gantt-task-name {
        width: 150px;
    }
    
    .view-toggle,
    .time-scale {
        width: 100%;
    }
    
    .view-toggle__btn,
    .time-scale__btn {
        flex: 1;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .loading-spinner {
        border-width: 2px;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .btn,
    .modal {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .section {
        display: block !important;
        page-break-after: always;
    }
    
    .section:last-child {
        page-break-after: auto;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.btn:focus,
.nav__link:focus,
.form__input:focus,
.form__textarea:focus,
.form__select:focus {
    outline: 2px solid var(--primary-medium);
    outline-offset: 2px;
}

/* Screen reader only content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}