html - Flexbox, absolute positioning and 100% height -

i've run bit of problem while playing around flexbox inside absolute box, inside defined height div (i'll explain along way).

first off, here's page demo, might easier grasp problem: http://geekometric.com/test_new_homepage.html

as can see, when hover block, text appears below doesn't quite show fully.

i have main div (let's call $main) hover part 600x250px overflow: hidden, , inside it, 2 divs: title , text (say $title , $text), appear after 1 (regular flow).

$title can take 2 lines, height set auto. $text set 100% height, positioned in relative , set display: flex. inside div ($intro) positioned in absolute, top: 100% (which switches 0 when hovered) , align-self: flex-end in order keep @ bottom of $main. (this keep text being stuck title - breathe)

the structure goes this, basically:

<div class="main">  <div class="title">i'm title!</div>  <div class="text">   <div class="intro"><p>just bunch of long paragraphs of text</p></div>  </div> </div> 

now, can see on demo, $text's height set 100%, expected height $main minus $title's heights, here seems $main's height, makes $text block overflow, , when hover block make text appear, locks bottom outside $main , cuts off part of text.

would have clue has how can make $text have expected height, knowing can't predict $title's height (and can't use calc(), @ least as know) , i don't want use javascript in way?

you can check source code on demo - know code bit heavy i'm testing things out, i'll clean when put online. ;)

thanks can provide, , hope clear - please let me know if need more details!

cheers,
chris

i've gone through , reworked code without using heights block text or title text , using flex. if use display: flex; only on container contain flexible items within it, tell each item how flexible (ie. flex-grow: 1;), you'll result you're looking for. here's link fiddle put using initial code , reworking code. let me know if have questions or need clarification on anything.

body {    font-family: 'bitter', georgia, serif;    width: 673px;  }  { color: #161616; text-decoration: none; }  * { box-sizing: border-box; }    .home_post_new * { transition: .5s all; }    .home_post_new {    background-position: right center;    background-repeat: no-repeat;    width: 100%;    height: 250px;    position: relative;    overflow: hidden;    margin-bottom: 20px;  }    .home_post_new_text {    float: right;    display: flex;    flex-direction: column;    width: 600px;    height: 100%;    background: hsla(0,0%,100%,0);    color: #fff;    position: relative;  }    .home_post_new:hover .home_post_new_text {    background: hsla(0,0%,0%,.33);  }    .home_post_new_block {    flex-grow: 2;    position: relative;    top: 250px;    width: 100%;    padding: 16px 16px 32px;    font-size: .9em;    line-height: 125%;    text-shadow: 0 1px 0 hsla(0,0%,0%,.75), 0 0 5px hsla(0,0%,0%,.75);  }  .home_post_new:hover .home_post_new_block {    top: 0;  }  .home_post_new_title {    flex-grow: 1;    font-family: 'source sans pro', arial, sans-serif;    font-size: 1.625em;    line-height: 1.333em;    width: 100%;    padding: 4px 8px 16px;    text-shadow: 0 1px 0 hsla(0,0%,0%,.75), 0 0 1px hsla(0,0%,0%,.75), 0 1px 5px hsla(0,0%,0%,.75);    background: -moz-linear-gradient(top, rgba(0,0,0,0.65) 0%, rgba(0,0,0,0) 100%);    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0.65)), color-stop(100%,rgba(0,0,0,0)));    background: -webkit-linear-gradient(top, rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%);    background: -o-linear-gradient(top, rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%);    background: -ms-linear-gradient(top, rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%);    background: linear-gradient(to bottom, rgba(0,0,0,0.65) 0%,rgba(0,0,0,0) 100%);  }    .home_post_new_more {    position: absolute;    right: 0;    bottom: -50%;    padding: 4px 8px;    font-family: 'source sans pro', arial, sans-serif;    color: #fff;    text-shadow: 0 1px 0 hsla(0,0%,0%,.75), 0 0 5px hsla(0,0%,0%,.75);    border-style: solid;    border-width: 1px 0 0 1px;    border-color: currentcolor;    border-radius: 0;     border-top-left-radius: 2px;    text-transform: uppercase;    letter-spacing: 1px;    background: hsla(0,0%,0%, .5);  }  .home_post_new_more:hover {    color: #009884;    cursor: pointer;  }  .home_post_new:hover .home_post_new_more {    bottom: 0;  }      .home_post_new_meta {    width: calc(100% - 600px);    height: 100%;    text-align: center;    color: #009884;  }    .home_post_new_date {    background: #009884;    color: #eee;    padding: 24px 0 0;    height: 50%;  }    .home_post_new_date_day {    font-size: 250%;    font-weight: bold;  }    .home_post_new_date_month {    font-family: 'source sans pro', arial, sans-serif;    text-transform: uppercase;    font-size: 150%;    border-top: 1px solid #eee;    display: inline-block;    margin-top: 8px;    padding-top: 4px;  }    .home_post_new_date_comments {    color: currentcolor;    display: inline-block;    border-radius: 50%;    border-bottom-right-radius: 0;    width: 42px;    height: 42px;    margin-top: 32px;     padding: 12px 4px;    border: 1px solid currentcolor;    margin-top: calc(50% - 4px);  }    .home_post_new_text:after {    clear: both;    overflow: auto;    zoom: 1;  }

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