/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
    --ss-green: #28a745;
    --ss-green-dark: #1e7e34;
    --ss-green-muted: rgba(40, 167, 69, 0.12);
    --ss-navy: #0f1523;
    --ss-navy-2: #1a2235;
    --ss-blue: #0066ff;
    --ss-orange: #ff7200;
    --ss-finance: #2563eb;
    --ss-retail: #059669;
    --ss-delivery: #d97706;
    --ss-media: #0891b2;
    --ss-hashicorp: #7b42bc;
    --ss-isovalent: #00bfff;
    --ss-codefresh: #11b3a5;
    --ss-lang-python: #3572A5;
    --ss-lang-go: #00ADD8;
    --ss-lang-node: #339933;
    --ss-lang-ts: #3178C6;
    --ss-lang-bash: #89E051;
    --ss-grey-mid: #5a6278;
    --ss-blue-muted: rgba(0,102,255,0.1);
    --ss-orange-muted: rgba(255,114,0,0.1);
    --ss-dark-gradient: linear-gradient(135deg, var(--ss-navy) 0%, var(--ss-navy-2) 100%);
    --radius: 12px;
    --transition: all 0.25s ease;
}

/* Base */
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--ss-navy-2);
}

/* Smooth fade-in for tab panes */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.tab-pane.show { animation: fade-up 0.3s ease; }

/* Spin for submit button */
@keyframes spin { to { transform: rotate(360deg); } }
.spin { display: inline-block; animation: spin 0.75s linear infinite; }

/* ============================================
   HERO
   ============================================ */
.hero-section {
    background: var(--ss-dark-gradient);
    padding: 5rem 0 3.5rem;
}

.hero-lead { max-width: 520px; }

.hero-stat-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--ss-green);
    line-height: 1;
}

.hero-stat-label {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.55);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.2rem;
}

/* ============================================
   SHARED ICON BOX BASE
   ============================================ */
.value-icon,
.expertise-icon,
.industry-icon,
.portfolio-github-icon,
.contact-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border-radius: 10px;
}

/* ============================================
   VALUE CARDS (About)
   ============================================ */
.value-icon {
    width: 52px;
    height: 52px;
    font-size: 1.4rem;
}
.value-icon.expertise { background: var(--ss-green-muted); color: var(--ss-green); }
.value-icon.vision    { background: var(--ss-blue-muted);   color: var(--ss-blue); }
.value-icon.results   { background: var(--ss-orange-muted); color: var(--ss-orange); }

/* ============================================
   EXPERTISE TABS
   ============================================ */
.expertise-section .nav-pills .nav-link {
    color: var(--ss-grey-mid);
    font-weight: 500;
    border-radius: 50px;
    padding: 0.5rem 1.25rem;
    transition: var(--transition);
}
.expertise-section .nav-pills .nav-link.active,
.expertise-section .nav-pills .nav-link:hover {
    background: var(--ss-green);
    color: white;
}
.expertise-section .nav-pills .nav-link:focus-visible {
    outline: 2px solid var(--ss-green);
    outline-offset: 2px;
}

.expertise-card {
    border-radius: var(--radius);
    transition: var(--transition);
}
.expertise-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.09);
    transform: translateY(-3px);
}

.expertise-icon {
    width: 48px;
    height: 48px;
    background: var(--ss-green-muted);
    color: var(--ss-green);
    font-size: 1.3rem;
}

/* ============================================
   INDUSTRY CARDS
   ============================================ */
.industry-icon {
    width: 52px;
    height: 52px;
    font-size: 1.4rem;
    color: white;
}
.industry-icon.finance  { background: var(--ss-finance); }
.industry-icon.retail   { background: var(--ss-retail); }
.industry-icon.delivery { background: var(--ss-delivery); }
.industry-icon.media    { background: var(--ss-media); }

.industry-card {
    border-radius: var(--radius);
    transition: var(--transition);
}
.industry-card:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

/* ============================================
   PORTFOLIO
   ============================================ */
.portfolio-github-icon {
    width: 48px;
    height: 48px;
    background: var(--ss-navy-2);
    color: white;
    font-size: 1.4rem;
}

.language-tag {
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    display: inline-block;
}
.language-tag.python { background: var(--ss-lang-python); color: white; }
.language-tag.go     { background: var(--ss-lang-go);     color: white; }
.language-tag.node   { background: var(--ss-lang-node);   color: white; }
.language-tag.ts     { background: var(--ss-lang-ts);     color: white; }
.language-tag.bash   { background: var(--ss-lang-bash);   color: var(--ss-navy-2); }

/* ============================================
   CONTACT
   ============================================ */
.contact-section {
    background: var(--ss-dark-gradient);
}

.contact-item {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}
.contact-item-icon {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    color: var(--ss-green);
    font-size: 1.1rem;
}

/* Service tags */
.service-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 1rem;
    background: #f0f2f5;
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ss-grey-mid);
    cursor: pointer;
    transition: var(--transition);
}
.service-tag:hover { border-color: var(--ss-green); color: var(--ss-green); }
.service-tag.active { background: var(--ss-green); color: white; border-color: var(--ss-green); }

/* Form */
#contactForm .form-control { transition: var(--transition); }
#contactForm .form-floating textarea.form-control { min-height: 120px; }

/* Form */
.btn-submit {
    background: var(--ss-green);
    border: none;
    color: white;
    width: 100%;
    padding: 0.75rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
}
.btn-submit:hover { background: var(--ss-green-dark); }
.btn-submit:disabled { opacity: 0.7; }

.success-message {
    background: var(--bs-success-bg-subtle);
    border: 2px solid var(--ss-green);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    margin-bottom: 1.25rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer-social a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.75);
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
}
.footer-social a:hover { background: var(--ss-green); color: white; }

/* Institution badge colours */
.text-hashicorp { color: var(--ss-hashicorp) !important; }
.text-isovalent { color: var(--ss-isovalent) !important; }
.text-codefresh { color: var(--ss-codefresh) !important; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 991px) {
    .hero-lead { max-width: none; }
}

@media (max-width: 767px) {
    .hero-section { padding: 4rem 0 2.5rem; }
}