/* Industrial Precision — SHC design system */

:root {
    --color-primary: #006699;
    --color-primary-hover: #004d75;
    --color-primary-light: #bfe0ff;
    --color-deep-navy: #1A3646;
    --color-on-surface: #1a1c1c;
    --color-outline-variant: #c0c7d0;
    --color-surface-variant: #e2e2e2;
    --color-surface-grid: #e0e0e0;
    --color-text-muted: #707880;
    --color-white: #ffffff;
    --color-on-primary-dark: #001e31;
    --color-primary-shadow: rgba(0, 102, 153, 0.15);
}

@layer base {
    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: "Inter", sans-serif;
        color: var(--color-on-surface);
    }
    h1, h2, h3, h4, h5, h6 {
        font-family: "Hanken Grotesk", sans-serif;
        font-weight: 600;
        letter-spacing: -0.01em;
    }
    .font-display {
        font-family: "Hanken Grotesk", sans-serif;
    }
    .font-mono {
        font-family: "JetBrains Mono", monospace;
    }
}

@layer components {
    .blueprint-bg {
        background-image: radial-gradient(circle, var(--color-surface-variant) 1px, transparent 1px);
        background-size: 24px 24px;
    }

    .technical-grid-bg {
        background-image:
            linear-gradient(var(--color-surface-grid) 1px, transparent 1px),
            linear-gradient(90deg, var(--color-surface-grid) 1px, transparent 1px);
        background-size: 40px 40px;
    }

    .technical-border {
        border: 1px solid var(--color-outline-variant);
    }

    .card-hover {
        transition: all 0.2s ease;
    }
    .card-hover:hover {
        border-top: 2px solid var(--color-primary);
        transform: translateY(-2px);
    }

    .label-technical {
        font-family: "JetBrains Mono", monospace;
        font-size: 13px;
        font-weight: 500;
        line-height: 16px;
        letter-spacing: 0.05em;
    }

    .form-input {
        width: 100%;
        padding: 0.75rem 1rem;
        border-radius: 0.125rem;
        border: 1px solid var(--color-outline-variant);
        background-color: var(--color-white);
        color: var(--color-on-surface);
        font-family: "Inter", sans-serif;
        font-size: 16px;
        transition: all 0.2s ease;
    }
    .form-input::placeholder {
        color: var(--color-text-muted);
        opacity: 0.7;
    }
    .form-input:hover {
        border-color: var(--color-primary);
    }
    .form-input:focus {
        outline: none;
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-primary-shadow);
    }

    .form-textarea {
        width: 100%;
        padding: 0.75rem 1rem;
        border-radius: 0.125rem;
        border: 1px solid var(--color-outline-variant);
        background-color: var(--color-white);
        color: var(--color-on-surface);
        font-family: "Inter", sans-serif;
        font-size: 16px;
        transition: all 0.2s ease;
        resize: vertical;
    }
    .form-textarea::placeholder {
        color: var(--color-text-muted);
        opacity: 0.7;
    }
    .form-textarea:hover {
        border-color: var(--color-primary);
    }
    .form-textarea:focus {
        outline: none;
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px var(--color-primary-shadow);
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        background-color: var(--color-primary);
        color: var(--color-white);
        padding: 0.75rem 2rem;
        border-radius: 0.125rem;
        font-family: "Inter", sans-serif;
        font-weight: 600;
        font-size: 14px;
        line-height: 20px;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        transition: all 0.2s ease;
        border: 1px solid var(--color-primary);
    }
    .btn-primary:hover {
        background-color: var(--color-primary-hover);
        border-color: var(--color-primary-hover);
    }
    .btn-primary:active {
        opacity: 0.8;
        transform: scale(0.98);
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        background-color: transparent;
        color: var(--color-primary);
        padding: 0.75rem 2rem;
        border-radius: 0.125rem;
        font-family: "Inter", sans-serif;
        font-weight: 600;
        font-size: 14px;
        line-height: 20px;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        transition: all 0.2s ease;
        border: 1px solid var(--color-primary);
    }
    .btn-ghost:hover {
        background-color: var(--color-primary);
        color: var(--color-white);
    }

    .btn-on-navy {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        background-color: var(--color-primary);
        color: var(--color-white);
        padding: 1rem 2rem;
        border-radius: 0.125rem;
        font-family: "Inter", sans-serif;
        font-weight: 600;
        font-size: 14px;
        line-height: 20px;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        transition: all 0.2s ease;
        border: 1px solid var(--color-primary);
    }
    .btn-on-navy:hover {
        background-color: var(--color-primary-light);
        color: var(--color-on-primary-dark);
        border-color: var(--color-primary-light);
    }

    .animate-on-scroll {
        opacity: 0;
        transform: translateY(2rem);
        transition: opacity 1s cubic-bezier(0.25, 0.1, 0.25, 1),
                    transform 1s cubic-bezier(0.25, 0.1, 0.25, 1);
    }

    .animate-on-scroll.is-visible {
        opacity: 1;
        transform: translateY(0);
    }

    .animate-on-scroll > *:nth-child(1) { transition-delay: 0ms; }
    .animate-on-scroll > *:nth-child(2) { transition-delay: 120ms; }
    .animate-on-scroll > *:nth-child(3) { transition-delay: 240ms; }
    .animate-on-scroll > *:nth-child(4) { transition-delay: 360ms; }
    .animate-on-scroll > *:nth-child(5) { transition-delay: 480ms; }
    .animate-on-scroll > *:nth-child(6) { transition-delay: 600ms; }

    .stat-number {
        font-variant-numeric: tabular-nums;
    }

    .process-flow-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 2rem;
        height: 2rem;
        line-height: 1;
    }

    .process-flow-icon--lucide svg,
    .process-flow-icon--lucide {
        width: 2rem;
        height: 2rem;
        stroke-width: 1.75;
    }

    .process-flow-icon--nerd {
        font-family: "Symbols Nerd Font", "JetBrainsMono Nerd Font", "JetBrains Mono", monospace;
        font-size: 1.75rem;
        font-weight: 500;
    }

    .no-js .animate-on-scroll {
        opacity: 1;
        transform: none;
    }

    .back-to-top {
        position: fixed;
        z-index: 50;
        right: 1.25rem;
        bottom: 5rem;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 3.5rem;
        height: 3.5rem;
        padding: 0;
        border: 1px solid var(--color-primary);
        border-radius: 0.125rem;
        background-color: var(--color-primary);
        color: var(--color-white);
        cursor: pointer;
        opacity: 0;
        visibility: hidden;
        transform: translateY(0.5rem);
        transition: opacity 0.25s ease,
                    transform 0.25s ease,
                    visibility 0.25s ease,
                    background-color 0.2s ease,
                    border-color 0.2s ease,
                    box-shadow 0.2s ease;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
    }

    @media (min-width: 768px) {
        .back-to-top {
            right: 2rem;
            bottom: 2rem;
            width: 3rem;
            height: 3rem;
        }
    }

    .back-to-top.is-visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .back-to-top:hover {
        background-color: var(--color-primary-hover);
        border-color: var(--color-primary-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    }

    .back-to-top:active {
        transform: translateY(0) scale(0.96);
    }

    .back-to-top .material-symbols-outlined {
        font-size: 1.5rem;
        font-weight: 500;
    }

    .no-js .back-to-top {
        display: none;
    }
}