/* ============================================
           RIHAN BUS RENTAL - CASE STUDY PAGE
           Premium Corporate Design System
        ============================================ */

        :root {
            --color-primary: #1B2B5A;
            --color-accent: #2EAD4B;
            --color-text: #2D3748;
            --color-text-light: #64748B;
            --color-bg: #FFFFFF;
            --color-bg-light: #F8FAFC;
            --color-bg-alt: #F1F5F9;
            --font-display: 'Georgia', 'Times New Roman', serif;
            --font-body: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            --shadow-sm: 0 2px 8px rgba(27, 43, 90, 0.06);
            --shadow-md: 0 8px 24px rgba(27, 43, 90, 0.08);
            --shadow-lg: 0 16px 48px rgba(27, 43, 90, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-narrow {
            max-width: 800px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-display);
            color: var(--color-primary);
            font-weight: 600;
            line-height: 1.3;
        }

        .section-decorator {
            width: 60px;
            height: 3px;
            background: var(--color-accent);
            margin: 16px 0 24px;
            border-radius: 2px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-family: var(--font-body);
            font-size: 0.95rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 6px;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

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

        .btn-primary:hover {
            background: #152347;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-accent {
            background: var(--color-accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: #259840;
            transform: translateY(-2px);
        }

        /* ============================================
           CASE STUDY HERO
        ============================================ */
        .case-hero {
            background: linear-gradient(135deg, var(--color-primary) 0%, #152347 100%);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }

        .case-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1560264280-88b68371db39?w=1200&q=80') center/cover;
            opacity: 0.1;
        }

        .case-hero-content {
            position: relative;
            z-index: 1;
            max-width: 700px;
        }

        .case-label {
            display: inline-block;
            background: var(--color-accent);
            color: #fff;
            padding: 6px 16px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }

        .case-hero h1 {
            font-size: clamp(1.75rem, 4vw, 2.75rem);
            color: #fff;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .case-hero-summary {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }

        .case-hero-meta {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .meta-item {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }

        .meta-item strong {
            display: block;
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        /* ============================================
           RESULTS BANNER
        ============================================ */
        .results-banner {
            background: var(--color-bg);
            margin-top: -40px;
            position: relative;
            z-index: 10;
            padding: 0 24px;
        }

        .results-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background: var(--color-bg);
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .result-item {
            padding: 40px 32px;
            text-align: center;
            border-right: 1px solid #E2E8F0;
        }

        .result-item:last-child {
            border-right: none;
        }

        .result-value {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--color-accent);
            font-family: var(--font-display);
            margin-bottom: 8px;
        }

        .result-label {
            color: var(--color-text-light);
            font-size: 0.9rem;
        }

        /* ============================================
           CASE CONTENT SECTIONS
        ============================================ */
        .case-section {
            padding: 80px 0;
        }

        .case-section:nth-child(even) {
            background: var(--color-bg-light);
        }

        .case-content h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            margin-bottom: 12px;
        }

        .case-content p {
            color: var(--color-text-light);
            font-size: 1.05rem;
            line-height: 1.9;
            margin-bottom: 20px;
        }

        .case-content p:last-child {
            margin-bottom: 0;
        }

        /* Client Background Section */
        .client-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .client-image {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .client-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        /* Challenges Section */
        .challenges-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 40px;
        }

        .challenge-card {
            background: var(--color-bg);
            padding: 32px;
            border-radius: 12px;
            border-left: 4px solid #DC2626;
            box-shadow: var(--shadow-sm);
        }

        .challenge-card h3 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: #991B1B;
        }

        .challenge-card p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            margin: 0;
        }

        /* Solution Section */
        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .solution-steps {
            counter-reset: step;
        }

        .solution-step {
            display: flex;
            gap: 20px;
            margin-bottom: 28px;
            padding-bottom: 28px;
            border-bottom: 1px solid #E2E8F0;
        }

        .solution-step:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .step-number {
            width: 48px;
            height: 48px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .step-content h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .step-content p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            margin: 0;
        }

        .solution-image {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .solution-image img {
            width: 100%;
            height: 500px;
            object-fit: cover;
        }

        /* Results Detail Section */
        .results-detail-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
            margin-top: 40px;
        }

        .result-detail-card {
            background: var(--color-bg);
            padding: 32px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            border-top: 4px solid var(--color-accent);
        }

        .result-detail-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .result-detail-card h3 span {
            width: 32px;
            height: 32px;
            background: var(--color-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.9rem;
        }

        .result-detail-card p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            margin: 0;
        }

        /* ============================================
           TESTIMONIAL SECTION
        ============================================ */
        .testimonial-section {
            padding: 100px 0;
            background: var(--color-primary);
            text-align: center;
        }

        .testimonial-quote {
            max-width: 800px;
            margin: 0 auto;
        }

        .quote-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 32px;
            color: var(--color-accent);
            opacity: 0.5;
        }

        .testimonial-quote blockquote {
            font-family: var(--font-display);
            font-size: clamp(1.25rem, 2.5vw, 1.75rem);
            color: #fff;
            font-style: italic;
            line-height: 1.6;
            margin-bottom: 32px;
        }

        .testimonial-author {
            color: rgba(255, 255, 255, 0.9);
        }

        .testimonial-author strong {
            display: block;
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .testimonial-author span {
            font-size: 0.9rem;
            opacity: 0.7;
        }

        /* ============================================
           CTA SECTION
        ============================================ */
        .cta-section {
            padding: 80px 0;
            background: var(--color-bg-light);
            text-align: center;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 1.1rem;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============================================
           ANIMATIONS
        ============================================ */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ============================================
           RESPONSIVE
        ============================================ */
        @media (max-width: 1024px) {
            .results-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .result-item:nth-child(2) {
                border-right: none;
            }

            .result-item:nth-child(3),
            .result-item:nth-child(4) {
                border-top: 1px solid #E2E8F0;
            }

            .client-grid,
            .solution-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .challenges-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .results-grid {
                grid-template-columns: 1fr;
            }

            .result-item {
                border-right: none;
                border-bottom: 1px solid #E2E8F0;
            }

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

            .challenges-grid,
            .results-detail-grid {
                grid-template-columns: 1fr;
            }

            .case-hero {
                padding: 80px 0;
            }

            .case-section {
                padding: 60px 0;
            }

            .case-hero-meta {
                gap: 20px;
            }
        }

        @media (max-width: 480px) {
            .cta-buttons {
                flex-direction: column;
            }

            .cta-buttons .btn {
                width: 100%;
            }
        }