/* Base Styles */
:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-secondary: #f8fafc;
  --color-accent: #0ea5e9;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.2s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.5;
  background-color: #fff;
  max-width:1440px;
  margin:auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  margin-bottom: 1rem;
  line-height: 1.2;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--color-primary);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

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

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

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

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

.btn-outline-light {
  background-color: transparent;
  border: 1px solid white;
  color: white;
}

.btn-outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Section Styles */
.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--color-secondary);
}

.lead-text {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: 2rem;
}

/* Hero Section */
.hero {
  position: relative;
  padding: 8rem 0;
  overflow: hidden;
  background-image: url('../images/img-project/project-005.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to right, #f8fafc, #f1f5f9);
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: 2.5rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;

  .btn {
    gap: 0.7rem;
  }
}

/* Navigation */
.main-nav {
  background-color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-links li a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 0.375rem;
  transition: var(--transition);
}

.nav-links li a:hover {
  color: var(--color-primary);
  background-color: var(--color-secondary);
}

.nav-links li a i {
  margin-right: 0.5rem;
}

/* Feature Box */
.feature-box {
  background-color: var(--color-secondary);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-top: 2rem;
  border: 1px solid var(--color-border);
  /* margin-left: 2rem;
  margin-right: 2rem; */
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
  justify-content: center;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  /* padding: 0px 10px 0px 50px; */
}

.feature-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.schematics {
  margin: 2rem auto;
  margin-bottom: 3rem;
  width: 90%;
  height: auto;
  justify-content: center;
  transition: all 0.3s ease-in-out;
  border-radius: 30px;
  background: #e0e0e0;
  box-shadow: 15px 15px 30px #bebebe,
             -15px -15px 30px #ffffff;
  &:hover {
    width: 92%;
  }
}

/* Pipeline Stages */
.pipeline-stages {
  position: relative;
  padding-left: 1.5rem;
  /* border: 1px solid black; */
}

.pipeline-stage {
  position: relative;
  margin-bottom: 3rem;
  display: flex;
  gap: 1.5rem;
}

.pipeline-stage:last-child {
  margin-bottom: 0;
}

.pipeline-stage::before {
  content: "";
  position: absolute;
  top: 3rem;
  left: 1.5rem;
  bottom: -3rem;
  width: 1px;
  background-color: var(--color-border);
  z-index: 0;
}

.pipeline-stage:last-child::before {
  display: none;
}

.stage-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: 9999px;
  font-size: 1.25rem;
  font-weight: bold;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.stage-content {
  flex-grow: 1;
  margin-top: 0.5rem;
}

.stage-details {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
  margin-top: 1rem;
}

.stage-details ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(200px, 1fr));
  gap: 0.5rem;
}

.stage-details li {
  display: flex;
  align-items: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.stage-details li i {
  font-size: 0.75rem;
  color: var(--color-text-light);
  margin-right: 0.5rem;
}

/* Database Structure */
.tabs {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.tab-header {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--color-border);
}

.tab-btn {
  padding: 1rem;
  text-align: center;
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-weight: 500;
  color: var(--color-text-light);
  transition: var(--transition);
}

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

.tab-btn.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.tab-content {
  padding: 1rem;
}

.tab-pane {
  display: none;
}

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

/* Schema Diagram */
.schema-diagram {
  background-color: var(--color-secondary);
  padding: 1.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

.schema-container {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.schema-svg {
  width: 100%;
  height: auto;
  max-width: 800px;
}

.schema-caption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: 1rem;
}

.schema-description {
  color: var(--color-text);
}

/* Database Tables */
.tables-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.db-table {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.db-table-header {
  background-color: var(--color-secondary);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.db-table-header h3 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.db-table-header p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.db-table table {
  width: 100%;
  border-collapse: collapse;
}

.db-table th {
  background-color: var(--color-secondary);
  text-align: left;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.db-table td {
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.db-table tr:first-child td {
  border-top: none;
}

.db-table tr:hover {
  background-color: var(--color-secondary);
}

/* Relationships */
.relationships-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.relationships-box {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
}

.relationships-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.5rem;
}

.relationship-item {
  background-color: var(--color-secondary);
  border-radius: 0.5rem;
  padding: 1rem;
}

.relationship-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .relationship-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.relationship-header h4 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.relationship-header p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.relationship-type {
  background-color: var(--color-secondary);
  color: var(--color-text);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.relationship-constraint {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.relationship-constraint code {
  font-size: 0.75rem;
  background-color: white;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.integrity-box {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
}

.integrity-box h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.integrity-list {
  margin-top: 0.5rem;
}

.integrity-list li {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.integrity-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-secondary);
  color: var(--color-text);
  border-radius: 9999px;
  font-size: 0.75rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

/* Technology Stack */
.tech-tabs {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.tech-tab-header {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .tech-tab-header {
    grid-template-columns: repeat(6, 1fr);
  }
}

.tech-tab-btn {
  padding: 1rem 0.5rem;
  text-align: center;
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-tab-btn i {
  margin-right: 0.5rem;
}

.tech-tab-btn:hover {
  color: var(--color-primary);
}

.tech-tab-btn.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.tech-tab-content {
  padding: 1rem;
}

.tech-tab-pane {
  display: none;
}

.tech-tab-pane.active {
  display: block;
}

.tech-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.tech-card {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
  transition: var(--transition);
}

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

.tech-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.tech-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* Challenges & Solutions */
.alert {
  display: flex;
  align-items: flex-start;
  background-color: #fff8f1;
  border-left: 4px solid var(--color-warning);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.alert-icon {
  color: var(--color-warning);
  font-size: 1.25rem;
  margin-right: 1rem;
}

.alert-content h3 {
  margin-bottom: 0.25rem;
}

.alert-content p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.accordion-item {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  padding: 1rem;
  cursor: pointer;
  transition: var(--transition);
}

.accordion-header:hover {
  background-color: var(--color-secondary);
}

.accordion-status {
  margin-right: 1rem;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.accordion-status.solved {
  color: var(--color-success);
}

.accordion-status.in-progress {
  color: var(--color-warning);
}

.accordion-status.unsolved {
  color: var(--color-danger);
}

.accordion-title {
  flex-grow: 1;
}

.accordion-title h3 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.accordion-title p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.status-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-right: 0.5rem;
}

.status-badge.solved {
  background-color: #ecfdf5;
  color: var(--color-success);
}

.status-badge.in-progress {
  background-color: #fffbeb;
  color: var(--color-warning);
}

.status-badge.unsolved {
  background-color: #fee2e2;
  color: var(--color-danger);
}

.accordion-icon {
  margin-left: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: var(--transition);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 0 1rem 1rem 3.25rem;
}

.accordion-item.active .accordion-content {
  display: block;
}

.challenge-solution {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.challenge-section h4,
.solution-section h4,
.impact-section h4 {
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

/* Automation and Scheduling */
.automation-tabs {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.automation-tab-header {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .automation-tab-header {
    grid-template-columns: repeat(4, 1fr);
  }
}

.automation-tab-btn {
  padding: 1rem 0.5rem;
  text-align: center;
  background-color: transparent;
  border: none;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text-light);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.automation-tab-btn i {
  margin-right: 0.5rem;
}

.automation-tab-btn:hover {
  color: var(--color-primary);
}

.automation-tab-btn.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.automation-tab-content {
  padding: 1rem;
}

.automation-tab-pane {
  display: none;
}

.automation-tab-pane.active {
  display: block;
}

.automation-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.automation-card {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  padding: 1rem;
  transition: var(--transition);
}

.automation-card:hover {
  box-shadow: var(--shadow-md);
}

.automation-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .automation-card-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.automation-card-header h3 {
  font-size: 1.125rem;
  margin-bottom: 0;
}

.schedule {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  color: var(--color-text);
  white-space: nowrap;
}

.schedule i {
  margin-right: 0.25rem;
  font-size: 0.75rem;
}

.automation-card p {
  font-size: 0.875rem;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.metrics-box {
  background-color: var(--color-secondary);
  padding: 0.75rem;
  border-radius: 0.375rem;
}

.metrics-box h4 {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.metric-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
}

.metric-item:last-child {
  margin-bottom: 0;
}

.metric-item span:first-child {
  color: var(--color-text-light);
}

.metric-item span:last-child {
  font-weight: 500;
  color: var(--color-text);
}

/* Footer */
.footer {
  background-color: var(--color-primary);
  color: white;
  padding: 3rem 0;
  text-align: center;
}

.footer h2 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.footer p {
  color: #94a3b8;
  margin-bottom: 2rem;
}

.footer-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.copyright {
  font-size: 0.875rem;
  color: #64748b;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .hero {
    padding: 5rem 0;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .section {
    padding: 3rem 0;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .stage-details ul {
    grid-template-columns: 1fr;
  }
}