/* ═══════════════════════════════════════════
   ResearchPro — Sub-Page & Component Styles
   ═══════════════════════════════════════════ */

/* ═══ PRELOADER ═══ */
.preloader{position:fixed;inset:0;z-index:10000;background:var(--navy);display:flex;align-items:center;justify-content:center;transition:opacity .6s,visibility .6s}
.preloader.loaded{opacity:0;visibility:hidden;pointer-events:none}
.preloader__content{text-align:center}
.preloader__logo{font-family:var(--font-serif);font-weight:700;font-style:italic;font-size:32px;color:#fff;margin-bottom:24px}
.preloader__logo span{color:var(--gold)}
.preloader__bar{width:200px;height:3px;background:rgba(255,255,255,.1);border-radius:999px;overflow:hidden}
.preloader__bar-fill{width:0;height:100%;background:linear-gradient(90deg,var(--gold),var(--gold-light));border-radius:999px;animation:preloaderFill 1s ease-out forwards}
@keyframes preloaderFill{to{width:100%}}

body.modal-open{overflow:hidden}

/* ═══ NAVBAR DROPDOWN (desktop) ═══ */
.navbar__dropdown{position:relative}
.navbar__dropdown-trigger{display:flex;align-items:center;gap:4px}
.navbar__dropdown-trigger svg{transition:transform .3s}
.navbar__dropdown.open .navbar__dropdown-trigger svg{transform:rotate(180deg)}
.navbar__dropdown-menu{position:absolute;top:100%;left:0;min-width:220px;background:linear-gradient(135deg,#fdf8ef,#faf3e2);border:1px solid rgba(201,169,110,.25);border-radius:16px;padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .3s var(--ease);box-shadow:0 20px 60px rgba(0,0,0,.1);z-index:100;list-style:none}
.navbar__dropdown.open .navbar__dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.navbar__dropdown-menu li{list-style:none}
.navbar__dropdown-menu a{display:block;padding:10px 16px;border-radius:10px;font-size:13px;font-weight:500;color:#111;transition:background .2s,color .2s}
.navbar__dropdown-menu a:hover{background:rgba(201,169,110,.15);color:#0f1729}
.navbar__dropdown-menu a.active{color:var(--gold);font-weight:600}
.navbar__links a.active{color:var(--gold)}

/* ═══ SCROLL TO TOP ═══ */
.scroll-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;border-radius:50%;background:var(--navy);border:1px solid rgba(201,169,110,.2);display:flex;align-items:center;justify-content:center;z-index:100;opacity:0;visibility:hidden;transform:translateY(20px);transition:all .4s var(--ease);cursor:pointer;box-shadow:0 8px 30px rgba(0,0,0,.15)}
.scroll-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.scroll-top:hover{background:var(--gold);border-color:var(--gold);transform:translateY(-4px);box-shadow:0 12px 40px rgba(201,169,110,.3)}
.scroll-top svg{width:20px;height:20px;stroke:var(--gold);fill:none;stroke-width:2;transition:stroke .3s}
.scroll-top:hover svg{stroke:var(--navy)}

/* ═══ MODAL ═══ */
.modal-overlay{position:fixed;inset:0;z-index:500;background:rgba(0,0,0,.6);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .4s;padding:24px}
.modal-overlay.active{opacity:1;visibility:visible}
.modal{background:var(--surface);border-radius:24px;padding:48px;max-width:480px;width:100%;position:relative;transform:translateY(30px) scale(.95);transition:transform .5s var(--ease);box-shadow:0 40px 100px rgba(0,0,0,.15)}
.modal-overlay.active .modal{transform:translateY(0) scale(1)}
.modal__close{position:absolute;top:16px;right:20px;font-size:28px;color:var(--text-muted);background:none;border:none;cursor:pointer;transition:color .3s;line-height:1}
.modal__close:hover{color:var(--text-primary)}
.modal__title{font-family:var(--font-serif);font-size:28px;font-weight:700;margin-bottom:8px}
.modal__desc{font-size:14px;color:var(--text-muted);font-weight:300;margin-bottom:28px;line-height:1.6}
.modal__form{display:flex;flex-direction:column;gap:12px}
.modal__input{padding:14px 18px;border:1.5px solid var(--glass-border);border-radius:12px;font-family:var(--font-sans);font-size:14px;background:var(--bg);color:var(--text-primary);transition:border-color .3s,box-shadow .3s;outline:none}
.modal__input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,169,110,.1)}
.modal__input.error{border-color:#e74c3c;box-shadow:0 0 0 3px rgba(231,76,60,.1)}
.modal__input.valid{border-color:#2ecc71}
.modal__select{appearance:none;cursor:pointer}
.modal__textarea{resize:vertical;min-height:80px}
.modal__submit{padding:16px;border-radius:12px;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--navy);font-weight:700;font-size:15px;border:none;cursor:pointer;transition:all .4s;letter-spacing:.5px}
.modal__submit:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(201,169,110,.3)}

/* ═══ TOAST ═══ */
.toast{position:fixed;bottom:32px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--navy);color:#fff;padding:16px 32px;border-radius:12px;font-size:14px;font-weight:500;z-index:600;opacity:0;transition:all .4s var(--ease);box-shadow:0 12px 40px rgba(0,0,0,.2);border:1px solid rgba(201,169,110,.15)}
.toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}

/* ═══ PAGE HERO (sub-pages) ═══ */
.page-hero{padding:160px 24px 100px;background:var(--navy);position:relative;overflow:hidden;text-align:center}
.page-hero::before{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:800px;height:800px;border-radius:50%;background:radial-gradient(circle,rgba(201,169,110,.06) 0%,transparent 70%);pointer-events:none}
.page-hero__label{display:inline-flex;align-items:center;gap:8px;background:rgba(201,169,110,.08);border:1px solid rgba(201,169,110,.15);border-radius:999px;padding:8px 20px;font-size:12px;font-weight:600;color:var(--gold);text-transform:uppercase;letter-spacing:2px;margin-bottom:28px}
.page-hero__title{font-family:var(--font-serif);font-size:clamp(2.2rem,5vw,3.8rem);font-weight:700;color:#fff;line-height:1.15;margin-bottom:20px;max-width:800px;margin-left:auto;margin-right:auto}
.page-hero__title em{font-style:italic;color:var(--gold)}
.page-hero__desc{font-size:18px;color:rgba(255,255,255,.5);font-weight:300;line-height:1.7;max-width:600px;margin:0 auto 36px}
.page-hero__ctas{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ═══ SERVICE DETAIL GRID ═══ */
.service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:1200px;margin:0 auto}
.service-card{padding:36px;border-radius:20px;background:var(--surface);border:1px solid var(--glass-border);transition:all .5s var(--ease);position:relative;overflow:hidden}
.service-card:hover{transform:translateY(-6px);box-shadow:0 20px 60px rgba(0,0,0,.06);border-color:var(--glass-border-hover)}
.service-card__icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(201,169,110,.08),rgba(201,169,110,.02));display:flex;align-items:center;justify-content:center;margin-bottom:20px;transition:all .3s}
.service-card:hover .service-card__icon{background:linear-gradient(135deg,rgba(201,169,110,.15),rgba(201,169,110,.06));transform:scale(1.05)}
.service-card__icon svg{width:24px;height:24px;stroke:var(--gold);fill:none;stroke-width:1.5}
.service-card__title{font-size:18px;font-weight:700;margin-bottom:10px;color:var(--text-primary)}
.service-card__body{font-size:14px;color:var(--text-secondary);font-weight:300;line-height:1.7}

/* ═══ PROCESS TIMELINE ═══ */
.timeline{max-width:900px;margin:0 auto;position:relative;padding-left:40px}
.timeline::before{content:'';position:absolute;left:15px;top:0;bottom:0;width:2px;background:linear-gradient(180deg,var(--gold),var(--glass-border))}
.timeline-step{position:relative;padding:0 0 48px 40px}
.timeline-step:last-child{padding-bottom:0}
.timeline-step__dot{position:absolute;left:-33px;top:4px;width:18px;height:18px;border-radius:50%;background:var(--bg);border:2px solid var(--gold);transition:all .4s;z-index:1}
.timeline-step.visible .timeline-step__dot{background:var(--gold);box-shadow:0 0 20px rgba(201,169,110,.3)}
.timeline-step__number{font-size:12px;font-weight:700;color:var(--gold);text-transform:uppercase;letter-spacing:2px;margin-bottom:8px}
.timeline-step__title{font-size:20px;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.timeline-step__desc{font-size:14px;color:var(--text-secondary);font-weight:300;line-height:1.7}

/* ═══ TECH STACK GRID ═══ */
.tech-grid{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;max-width:800px;margin:0 auto}
.tech-badge{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:999px;background:var(--surface);border:1px solid var(--glass-border);font-size:14px;font-weight:500;color:var(--text-primary);transition:all .3s}
.tech-badge:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-3px);box-shadow:0 8px 25px rgba(201,169,110,.08)}

/* ═══ CASE STUDY CARDS ═══ */
.case-card{border-radius:20px;overflow:hidden;background:var(--surface);border:1px solid var(--glass-border);transition:all .5s var(--ease)}
.case-card:hover{transform:translateY(-8px);box-shadow:0 25px 70px rgba(0,0,0,.08)}
.case-card__image{height:200px;background:linear-gradient(135deg,var(--navy),var(--navy-light));display:flex;align-items:center;justify-content:center;padding:24px;position:relative;overflow:hidden}
.case-card__image::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(12,18,34,.4));pointer-events:none}
.case-card__image-icon{width:64px;height:64px;border-radius:16px;background:rgba(201,169,110,.1);display:flex;align-items:center;justify-content:center;position:relative;z-index:1}
.case-card__image-icon svg{width:32px;height:32px;stroke:var(--gold);fill:none;stroke-width:1.5}
.case-card__body{padding:28px}
.case-card__tag{display:inline-block;font-size:11px;font-weight:600;color:var(--gold);text-transform:uppercase;letter-spacing:2px;margin-bottom:12px}
.case-card__title{font-size:20px;font-weight:700;margin-bottom:10px}
.case-card__desc{font-size:14px;color:var(--text-secondary);font-weight:300;line-height:1.7;margin-bottom:16px}
.case-card__metrics{display:flex;gap:24px}
.case-card__metric{text-align:center}
.case-card__metric-value{font-size:24px;font-weight:800;color:var(--gold);display:block}
.case-card__metric-label{font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px}

/* ═══ BLOG CARDS ═══ */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:28px;max-width:1200px;margin:0 auto}
.blog-card{border-radius:20px;overflow:hidden;background:var(--surface);border:1px solid var(--glass-border);transition:all .5s var(--ease)}
.blog-card:hover{transform:translateY(-6px);box-shadow:0 20px 60px rgba(0,0,0,.06)}
.blog-card__image{height:180px;background:linear-gradient(135deg,var(--navy) 0%,var(--navy-light) 100%);display:flex;align-items:center;justify-content:center;position:relative}
.blog-card__category{position:absolute;top:16px;left:16px;font-size:10px;font-weight:700;color:var(--navy);background:var(--gold);padding:5px 14px;border-radius:999px;text-transform:uppercase;letter-spacing:1.5px}
.blog-card__body{padding:24px}
.blog-card__meta{font-size:12px;color:var(--text-muted);margin-bottom:10px;display:flex;gap:16px}
.blog-card__title{font-size:18px;font-weight:700;margin-bottom:10px;line-height:1.4;transition:color .3s}
.blog-card:hover .blog-card__title{color:var(--gold)}
.blog-card__excerpt{font-size:14px;color:var(--text-secondary);font-weight:300;line-height:1.7;margin-bottom:16px}
.blog-card__link{font-size:13px;font-weight:600;color:var(--gold);display:inline-flex;align-items:center;gap:6px;transition:gap .3s}
.blog-card:hover .blog-card__link{gap:10px}

/* ═══ CONTACT FORM ═══ */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;max-width:1100px;margin:0 auto;align-items:start}
.contact-info__title{font-family:var(--font-serif);font-size:32px;font-weight:700;margin-bottom:16px}
.contact-info__desc{font-size:15px;color:var(--text-secondary);font-weight:300;line-height:1.7;margin-bottom:32px}
.contact-info__item{display:flex;align-items:flex-start;gap:16px;margin-bottom:24px}
.contact-info__icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,rgba(201,169,110,.08),rgba(201,169,110,.02));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-info__icon svg{width:20px;height:20px;stroke:var(--gold);fill:none;stroke-width:1.5}
.contact-info__label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--text-muted);margin-bottom:4px}
.contact-info__value{font-size:15px;color:var(--text-primary);font-weight:400}
.page-form{background:var(--surface);border:1px solid var(--glass-border);border-radius:24px;padding:40px}
.page-form__title{font-size:22px;font-weight:700;margin-bottom:24px}
.page-form__grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.page-form__input{padding:14px 18px;border:1.5px solid var(--glass-border);border-radius:12px;font-family:var(--font-sans);font-size:14px;background:var(--bg);color:var(--text-primary);transition:border-color .3s,box-shadow .3s;outline:none;width:100%}
.page-form__input:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,169,110,.1)}
.page-form__input.error{border-color:#e74c3c}
.page-form__input.valid{border-color:#2ecc71}
.page-form__full{grid-column:1/-1}
.page-form__submit{grid-column:1/-1;padding:16px;border-radius:12px;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:var(--navy);font-weight:700;font-size:15px;border:none;cursor:pointer;transition:all .4s;letter-spacing:.5px}
.page-form__submit:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(201,169,110,.3)}

/* ═══ BENEFITS GRID ═══ */
.benefits-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;max-width:1200px;margin:0 auto}
.benefit-card{padding:32px;border-radius:16px;background:var(--bg);border:1px solid var(--glass-border);text-align:center;transition:all .4s}
.benefit-card:hover{transform:translateY(-4px);box-shadow:0 15px 50px rgba(0,0,0,.05)}
.benefit-card__icon{font-size:36px;margin-bottom:16px}
.benefit-card__title{font-size:16px;font-weight:700;margin-bottom:8px}
.benefit-card__desc{font-size:13px;color:var(--text-secondary);font-weight:300;line-height:1.6}

/* ═══ COMPARISON TABLE ═══ */
.comparison-table{width:100%;max-width:1000px;margin:0 auto;border-collapse:separate;border-spacing:0;border-radius:16px;overflow:hidden;border:1px solid var(--glass-border)}
.comparison-table th{background:var(--navy);color:rgba(255,255,255,.8);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:2px;padding:18px 24px;text-align:left}
.comparison-table th:first-child{color:var(--gold)}
.comparison-table td{padding:16px 24px;border-bottom:1px solid var(--glass-border);font-size:14px;color:var(--text-secondary);font-weight:300}
.comparison-table tr:last-child td{border-bottom:none}
.comparison-table tr:hover td{background:rgba(201,169,110,.02)}
.comparison-table .check{color:var(--gold);font-weight:600}
.comparison-table .highlight{background:rgba(201,169,110,.03)}

/* ═══ FILTER BUTTONS ═══ */
.filter-bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.filter-btn{padding:10px 24px;border-radius:999px;font-size:13px;font-weight:500;border:1px solid var(--glass-border);background:transparent;color:var(--text-secondary);cursor:pointer;transition:all .3s}
.filter-btn:hover,.filter-btn.active{background:var(--navy);color:var(--gold);border-color:var(--navy)}

/* ═══ RESPONSIVE SUB-PAGES ═══ */
@media(max-width:1024px){.service-grid{grid-template-columns:repeat(2,1fr)}.contact-grid{grid-template-columns:1fr}.blog-grid{grid-template-columns:repeat(2,1fr)}.page-form__grid{grid-template-columns:1fr}.case-card__metrics{flex-wrap:wrap;gap:16px}}
@media(max-width:768px){.service-grid{grid-template-columns:1fr}.blog-grid{grid-template-columns:1fr}.timeline{padding-left:30px}.timeline::before{left:10px}.timeline-step{padding-left:30px}.timeline-step__dot{left:-28px}.page-hero{padding:140px 20px 80px}.page-hero__title{font-size:clamp(1.8rem,5vw,3rem)}.tech-grid{gap:10px}.comparison-table{font-size:12px}}