/* =========================================================
   PRADHEEP TALKS — PROFESSIONAL PAGE DESIGN
   Scope: .pradheep-talks only
   ========================================================= */

.pradheep-talks {
    --pt-primary: #173f5f;
    --pt-secondary: #1f7a8c;
    --pt-accent: #d69e2e;
    --pt-light: #f5f8fa;
    --pt-white: #ffffff;
    --pt-dark: #1f2933;
    --pt-muted: #64748b;
    --pt-border: #dbe4ea;

    max-width: 1180px;
    margin: 0 auto;
    padding: 30px 20px 60px;
    color: var(--pt-dark);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.7;
}

/* ---------- GLOBAL ---------- */

.pradheep-talks *,
.pradheep-talks *::before,
.pradheep-talks *::after {
    box-sizing: border-box;
}

.pradheep-talks a {
    color: var(--pt-secondary);
    text-decoration: none;
}

.pradheep-talks a:hover {
    text-decoration: underline;
}

.pradheep-talks h1,
.pradheep-talks h2,
.pradheep-talks h3,
.pradheep-talks h4 {
    line-height: 1.25;
}

/* ---------- HERO ---------- */

.pradheep-talks .pt-hero {
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(135deg, #173f5f 0%, #1f7a8c 100%);
    color: #ffffff;
    border-radius: 22px;
    padding: 55px 45px;
    margin-bottom: 35px;
    box-shadow: 0 15px 40px rgba(23, 63, 95, 0.18);
}

.pradheep-talks .pt-hero::after {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    right: -80px;
    top: -90px;
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 50%;
}

.pradheep-talks .pt-eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #ffe9a8;
}

.pradheep-talks .pt-hero h1 {
    margin: 0 0 15px;
    color: #ffffff;
    font-size: clamp(34px, 5vw, 58px);
    font-weight: 800;
}

.pradheep-talks .pt-hero p {
    max-width: 820px;
    margin: 0 0 25px;
    color: rgba(255,255,255,0.92);
    font-size: 18px;
}

.pradheep-talks .pt-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.pradheep-talks .pt-button {
    display: inline-block;
    padding: 11px 20px;
    border-radius: 999px;
    background: #ffffff;
    color: var(--pt-primary) !important;
    font-weight: 700;
    text-decoration: none !important;
    transition: all 0.2s ease;
}

.pradheep-talks .pt-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.pradheep-talks .pt-button.pt-button-outline {
    background: transparent;
    color: #ffffff !important;
    border: 1px solid rgba(255,255,255,0.6);
}

/* ---------- INTRO ---------- */

.pradheep-talks .pt-intro {
    max-width: 900px;
    margin: 0 auto 45px;
    text-align: center;
}

.pradheep-talks .pt-intro h2 {
    margin-bottom: 12px;
    color: var(--pt-primary);
    font-size: 32px;
}

.pradheep-talks .pt-intro p {
    color: var(--pt-muted);
    font-size: 17px;
}

/* ---------- SECTION HEADINGS ---------- */

.pradheep-talks .pt-section {
    margin: 55px 0;
}

.pradheep-talks .pt-section-title {
    margin-bottom: 25px;
}

.pradheep-talks .pt-section-title h2 {
    margin: 0 0 8px;
    color: var(--pt-primary);
    font-size: 30px;
}

.pradheep-talks .pt-section-title p {
    margin: 0;
    color: var(--pt-muted);
}

/* ---------- EVENT CARDS ---------- */

.pradheep-talks .pt-event-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.pradheep-talks .pt-event-card {
    position: relative;
    padding: 27px;
    background: var(--pt-white);
    border: 1px solid var(--pt-border);
    border-radius: 16px;
    box-shadow: 0 7px 22px rgba(23,63,95,0.07);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pradheep-talks .pt-event-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 32px rgba(23,63,95,0.13);
}

.pradheep-talks .pt-event-date {
    display: inline-block;
    margin-bottom: 12px;
    padding: 5px 11px;
    border-radius: 20px;
    background: #eef7f8;
    color: var(--pt-secondary);
    font-size: 13px;
    font-weight: 700;
}

.pradheep-talks .pt-event-card h3 {
    margin: 0 0 12px;
    color: var(--pt-primary);
    font-size: 21px;
}

.pradheep-talks .pt-event-card p {
    margin: 7px 0;
    color: var(--pt-muted);
}

.pradheep-talks .pt-event-card strong {
    color: var(--pt-dark);
}

/* ---------- TOPICS / THEMES ---------- */

.pradheep-talks .pt-theme-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.pradheep-talks .pt-theme {
    padding: 23px;
    background: var(--pt-light);
    border-left: 4px solid var(--pt-accent);
    border-radius: 12px;
}

.pradheep-talks .pt-theme h3 {
    margin: 0 0 8px;
    color: var(--pt-primary);
    font-size: 18px;
}

.pradheep-talks .pt-theme p {
    margin: 0;
    color: var(--pt-muted);
    font-size: 15px;
}

/* ---------- RESOURCES ---------- */

.pradheep-talks .pt-resource-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.pradheep-talks .pt-resource {
    display: block;
    padding: 23px;
    background: #ffffff;
    border: 1px solid var(--pt-border);
    border-radius: 14px;
    box-shadow: 0 5px 18px rgba(23,63,95,0.06);
}

.pradheep-talks .pt-resource h3 {
    margin: 0 0 8px;
    color: var(--pt-primary);
    font-size: 18px;
}

.pradheep-talks .pt-resource p {
    margin: 0;
    color: var(--pt-muted);
    font-size: 14px;
}

/* ---------- YEAR ARCHIVE ---------- */

.pradheep-talks .pt-archive {
    margin-top: 20px;
}

.pradheep-talks .pt-year {
    margin-bottom: 13px;
    border: 1px solid var(--pt-border);
    border-radius: 12px;
    background: #ffffff;
    overflow: hidden;
}

.pradheep-talks .pt-year summary {
    cursor: pointer;
    padding: 17px 20px;
    background: var(--pt-light);
    color: var(--pt-primary);
    font-size: 20px;
    font-weight: 800;
    list-style: none;
}

.pradheep-talks .pt-year summary::-webkit-details-marker {
    display: none;
}

.pradheep-talks .pt-year summary::after {
    content: "+";
    float: right;
    color: var(--pt-secondary);
    font-size: 22px;
}

.pradheep-talks .pt-year[open] summary::after {
    content: "−";
}

.pradheep-talks .pt-history {
    padding: 8px 22px 15px;
}

.pradheep-talks .pt-history-item {
    padding: 18px 0;
    border-bottom: 1px solid #e8eef2;
}

.pradheep-talks .pt-history-item:last-child {
    border-bottom: none;
}

.pradheep-talks .pt-history-item h3 {
    margin: 0 0 5px;
    color: var(--pt-primary);
    font-size: 18px;
}

.pradheep-talks .pt-history-item p {
    margin: 4px 0;
    color: var(--pt-muted);
}

.pradheep-talks .pt-date {
    margin-bottom: 5px;
    color: var(--pt-secondary);
    font-size: 13px;
    font-weight: 700;
}

/* ---------- NOTES ---------- */

.pradheep-talks .pt-note {
    margin: 25px 0;
    padding: 18px 22px;
    border-left: 4px solid var(--pt-accent);
    background: #fffaf0;
    border-radius: 8px;
    color: #5f4b20;
}

/* ---------- CTA ---------- */

.pradheep-talks .pt-cta {
    margin-top: 55px;
    padding: 40px 30px;
    background: var(--pt-primary);
    color: #ffffff;
    text-align: center;
    border-radius: 20px;
}

.pradheep-talks .pt-cta h2 {
    margin: 0 0 12px;
    color: #ffffff;
    font-size: 30px;
}

.pradheep-talks .pt-cta p {
    max-width: 750px;
    margin: 0 auto 22px;
    color: rgba(255,255,255,0.9);
}

.pradheep-talks .pt-cta a {
    color: #ffffff;
    font-weight: 700;
}

/* ---------- MOBILE ---------- */

@media (max-width: 800px) {

    .pradheep-talks {
        padding: 20px 14px 45px;
    }

    .pradheep-talks .pt-hero {
        padding: 38px 25px;
        border-radius: 16px;
    }

    .pradheep-talks .pt-hero h1 {
        font-size: 38px;
    }

    .pradheep-talks .pt-event-grid,
    .pradheep-talks .pt-theme-grid,
    .pradheep-talks .pt-resource-grid {
        grid-template-columns: 1fr;
    }

    .pradheep-talks .pt-section {
        margin: 40px 0;
    }

    .pradheep-talks .pt-section-title h2 {
        font-size: 26px;
    }
}

@media (max-width: 480px) {

    .pradheep-talks .pt-hero {
        padding: 30px 20px;
    }

    .pradheep-talks .pt-hero h1 {
        font-size: 32px;
    }

    .pradheep-talks .pt-hero p {
        font-size: 16px;
    }

    .pradheep-talks .pt-button {
        width: 100%;
        text-align: center;
    }

    .pradheep-talks .pt-event-card {
        padding: 21px;
    }

    .pradheep-talks .pt-year summary {
        font-size: 18px;
    }
}