/* =========================================================================
   Altronix Design Tools hub  —  /system_design_tools/system_surveyor
   Self-contained styling layered on top of Bootstrap 3.
   Does not depend on styles.css so it renders predictably.
   Brand palette lives in the :root variables below — tweak to match the
   live Altronix brand spec if exact hex values differ.
   ========================================================================= */

:root {
    --dt-red:        #e21e26;   /* Altronix red accent */
    --dt-red-dark:   #b8161d;
    --dt-ink:        #1b1e24;   /* near-black (navbar tone) */
    --dt-ink-2:      #2b3038;
    --dt-slate:      #4a5058;
    --dt-muted:      #6c757d;
    --dt-line:       #e4e7eb;
    --dt-bg:         #f5f7fa;
    --dt-card-bg:    #ffffff;
    --dt-radius:     8px;
    --dt-shadow:     0 1px 3px rgba(20,23,28,.08), 0 6px 18px rgba(20,23,28,.06);
    --dt-shadow-lg:  0 10px 28px rgba(20,23,28,.16);
}

/* Page canvas. The global layout already offsets the body for the fixed-top
   navbar, so we don't add padding-top here (avoids a double gap / seam). */
.dt-page {
    background: var(--dt-bg);
    color: var(--dt-ink);
    font-family: "Open Sans", "Roboto", "Helvetica Neue", Arial, sans-serif;
    overflow-x: hidden;
}

/* ---------------------------------------------------------------- HERO --- */
.dt-hero {
    position: relative;
    color: #fff;
    text-align: center;
    padding: 96px 20px 104px;
    background:
        linear-gradient(120deg, rgba(16,18,23,.92) 0%, rgba(20,23,28,.82) 52%, rgba(150,20,26,.74) 100%),
        url('/images/system_surveyor/tablet-hands-mockup.jpg') center center / cover no-repeat,
        var(--dt-ink);
    overflow: hidden;
}
/* thin brand rule along the bottom of the hero */
.dt-hero::after {
    content: "";
    position: absolute; left: 0; right: 0; bottom: 0; height: 4px;
    background: var(--dt-red);
}
.dt-hero-inner { position: relative; max-width: 820px; margin: 0 auto; }
.dt-eyebrow {
    display: inline-block;
    font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
    font-weight: 700; color: #ff9ea3;
    margin-bottom: 14px;
}
.dt-hero h1 {
    font-family: "Roboto", "Open Sans", sans-serif;
    font-weight: 800;
    font-size: 44px; line-height: 1.1; margin: 0 0 16px;
    letter-spacing: -.5px;
}
.dt-hero p {
    font-size: 18px; line-height: 1.55;
    color: rgba(255,255,255,.85);
    margin: 0 auto 28px; max-width: 640px;
}
.dt-hero .btn { margin: 6px; }

/* ------------------------------------------------------------ BUTTONS --- */
.btn-dt {
    background: var(--dt-red);
    border: 1px solid var(--dt-red);
    color: #fff;
    font-weight: 600;
    padding: 11px 26px;
    border-radius: var(--dt-radius);
    transition: background .15s ease, transform .1s ease, box-shadow .15s ease;
}
.btn-dt:hover, .btn-dt:focus { background: var(--dt-red-dark); border-color: var(--dt-red-dark); color: #fff; }
.btn-dt:active { transform: translateY(1px); }

.btn-dt-ghost {
    background: transparent;
    border: 1px solid rgba(255,255,255,.55);
    color: #fff;
    font-weight: 600;
    padding: 11px 26px;
    border-radius: var(--dt-radius);
    transition: background .15s ease, border-color .15s ease;
}
.btn-dt-ghost:hover, .btn-dt-ghost:focus { background: rgba(255,255,255,.12); border-color: #fff; color: #fff; }

/* ------------------------------------------------------- BENEFIT STRIP --- */
.dt-benefits {
    background: #fff;
    border-bottom: 1px solid var(--dt-line);
    padding: 26px 0;
}
.dt-benefits .row { display: flex; flex-wrap: wrap; }
.dt-benefit {
    text-align: center;
    padding: 14px 10px;
    color: var(--dt-slate);
}
.dt-benefit i, .dt-benefit .dt-bi {
    display: inline-flex; align-items: center; justify-content: center;
    width: 46px; height: 46px; margin-bottom: 8px;
    border-radius: 50%;
    background: rgba(226,30,38,.10);
    color: var(--dt-red);
    font-size: 20px;
}
.dt-benefit strong { display: block; color: var(--dt-ink); font-size: 15px; }
.dt-benefit span { font-size: 13px; color: var(--dt-muted); }

/* -------------------------------------------------------------- INTRO --- */
.dt-intro { background: #fff; border-bottom: 1px solid var(--dt-line); padding: 40px 0; }
.dt-intro-lead {
    max-width: 860px; margin: 0 auto; text-align: center;
    font-size: 19px; line-height: 1.7; color: var(--dt-slate);
}
.dt-intro-lead strong { color: var(--dt-ink); }

/* ------------------------------------------------------ DEVICE SHOWCASE --- */
.dt-showcase { background: #fff; border-bottom: 1px solid var(--dt-line); padding: 50px 0 46px; }
.dt-showcase-img { display: block; width: 100%; max-width: 1000px; height: auto; margin: 26px auto 0; }

/* --------------------------------------------------------- TOOL GRID --- */
.dt-center { text-align: center; }
.dt-center .dt-section-sub { max-width: 760px; margin-left: auto; margin-right: auto; }
.dt-section { padding: 46px 0;}
.dt-section-alt { background: #fff; border-top: 1px solid var(--dt-line); border-bottom: 1px solid var(--dt-line); padding-bottom: 46px; }
.dt-section-head { margin-bottom: 26px; }
.dt-section-title {
    font-family: "Roboto", "Open Sans", sans-serif;
    font-weight: 700; font-size: 24px; color: var(--dt-ink);
    margin: 0 0 6px;
}
.dt-section-sub { color: var(--dt-muted); font-size: 15px; margin: 0; }

/* equal-height cards using flex over the BS3 grid */
.dt-grid { display: flex; flex-wrap: wrap; margin-left: -12px; margin-right: -12px; }
.dt-grid > [class*="col-"] { display: flex; padding-left: 12px; padding-right: 12px; margin-bottom: 24px; }

.dt-card {
    display: flex; flex-direction: column;
    width: 100%;
    background: var(--dt-card-bg);
    border: 1px solid var(--dt-line);
    border-radius: var(--dt-radius);
    padding: 26px 24px 24px;
    box-shadow: var(--dt-shadow);
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.dt-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--dt-shadow-lg);
    border-color: rgba(226,30,38,.35);
}
.dt-card-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 54px; height: 54px; margin-bottom: 16px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--dt-ink) 0%, var(--dt-ink-2) 100%);
    color: #fff; font-size: 24px;
}
.dt-card:hover .dt-card-icon { background: linear-gradient(135deg, var(--dt-red-dark) 0%, var(--dt-red) 100%); }
.dt-card-title { font-size: 18px; font-weight: 700; color: var(--dt-ink); margin: 0 0 8px; }
.dt-card-desc { font-size: 14px; line-height: 1.55; color: var(--dt-muted); margin: 0 0 18px; flex: 1 1 auto; }
.dt-card-cta {
    display: inline-flex; align-items: center; gap: 6px;
    font-weight: 700; font-size: 14px; color: var(--dt-red);
    text-decoration: none; align-self: flex-start;
}
.dt-card-cta:hover, .dt-card-cta:focus { color: var(--dt-red-dark); text-decoration: none; }
.dt-card-cta .dt-arrow { transition: transform .15s ease; }
.dt-card:hover .dt-card-cta .dt-arrow { transform: translateX(4px); }

/* stretch the whole card into a clickable link without losing styling */
a.dt-card, a.dt-card:hover, a.dt-card:focus { text-decoration: none; color: inherit; }

/* centered grid (used when a section has only a few cards) */
.dt-grid-center { justify-content: center; }

/* product-catalog download button (horizontal: icon tile + title/meta) */
.dt-catalog-wrap { display: flex; justify-content: center; }
.dt-catalog-btn {
    display: flex; align-items: center; gap: 14px;
    width: 100%; max-width: 300px;
    background: transparent;
    border: 2px solid #c2c9d1;
    border-radius: 12px;
    padding: 12px 15px;
    text-decoration: none;
    transition: transform .1s ease, background .15s ease, box-shadow .16s ease, border-color .16s ease;
}
/* hover: transparent -> white (default button behavior); text stays the same */
.dt-catalog-btn:hover, .dt-catalog-btn:focus {
    background: #fff;
    border-color: #aab2bc;
    box-shadow: var(--dt-shadow);
    text-decoration: none;
}
/* press-down feedback, matching the other page buttons (.btn-dt:active) */
.dt-catalog-btn:active { transform: translateY(1px); }
.dt-catalog-icon {
    flex: 0 0 auto;
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: 10px;
    background: var(--dt-ink);
    color: #fff;
    transition: background .16s ease;
}
.dt-catalog-icon svg { width: 20px; height: 20px; }
/* icon turns red on hover */
.dt-catalog-btn:hover .dt-catalog-icon, .dt-catalog-btn:focus .dt-catalog-icon { background: var(--dt-red); }
.dt-catalog-text { display: flex; flex-direction: column; min-width: 0; }
.dt-catalog-title {
    font-family: "Roboto", "Open Sans", sans-serif;
    font-weight: 800; font-size: 15px; line-height: 1.2;
    color: var(--dt-ink);
}
.dt-catalog-meta { font-size: 11.5px; color: var(--dt-muted); margin-top: 3px; }

/* informational (non-clickable) feature cards: keep a subtle presence, no lift */
.dt-card-static { cursor: default; }
.dt-card-static .dt-card-icon { align-self: center; }
.dt-card-static:hover {
    transform: none;
    box-shadow: var(--dt-shadow);
    border-color: var(--dt-line);
}
.dt-card-static .dt-card-icon {
    background: linear-gradient(135deg, var(--dt-red-dark) 0%, var(--dt-red) 100%);
}

/* ------------------------------------------------------- HOW-IT-WORKS --- */
.dt-steps { display: flex; flex-wrap: wrap; margin: 0 -14px; }
.dt-step { flex: 1 1 0; min-width: 220px; padding: 8px 14px 20px; position: relative; }
.dt-step-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; margin-bottom: 14px;
    border-radius: 50%;
    background: var(--dt-red); color: #fff;
    font-weight: 800; font-size: 18px;
    box-shadow: 0 4px 12px rgba(226,30,38,.35);
}
.dt-step-title { font-size: 17px; font-weight: 700; color: var(--dt-ink); margin: 0 0 6px; }
.dt-step-desc { font-size: 14px; line-height: 1.55; color: var(--dt-muted); margin: 0; }

/* lighter "resources" cards */
.dt-section-resources { background: #fff; margin-top: 40px; border-top: 1px solid var(--dt-line); padding-bottom: 46px; }
.dt-card-sm { padding: 20px; }
.dt-card-sm .dt-card-icon { width: 44px; height: 44px; font-size: 19px; border-radius: 10px; }
.dt-card-sm .dt-card-title { font-size: 16px; margin-bottom: 4px; }

/* -------------------------------------------------------------- CTA --- */
.dt-cta {
    margin-top: 8px;
    background: linear-gradient(120deg, var(--dt-ink) 0%, var(--dt-ink-2) 100%);
    color: #fff; text-align: center;
    padding: 54px 20px;
}
.dt-cta h2 { font-family: "Roboto", sans-serif; font-weight: 800; font-size: 30px; margin: 0 0 10px; }
.dt-cta p { font-size: 17px; color: rgba(255,255,255,.82); margin: 0 auto 24px; max-width: 560px; }

/* --------------------------------------------------------- RESPONSIVE --- */
@media (max-width: 991px) {
    .dt-hero h1 { font-size: 36px; }
}
@media (max-width: 767px) {
    .dt-hero { padding: 60px 18px 66px; }
    .dt-hero h1 { font-size: 29px; }
    .dt-hero p { font-size: 16px; }
    .dt-benefits .row { display: block; }
    .dt-intro-lead { font-size: 17px; }
    .dt-section-title { font-size: 21px; }
    .dt-steps { display: block; }
    .dt-step { padding-bottom: 8px; }
    .dt-cta h2 { font-size: 24px; }
}